2532 lines
40 KiB
Text
2532 lines
40 KiB
Text
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#LyX 2.0 created this file. For more info see http://www.lyx.org/
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\lyxformat 413
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\begin_document
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\begin_header
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\textclass article
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\use_default_options true
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\maintain_unincluded_children false
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\language english
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\language_package default
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\inputencoding auto
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\fontencoding global
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\font_roman default
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\font_sans default
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\font_typewriter default
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\font_default_family default
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\use_non_tex_fonts false
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\font_sc false
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\font_osf false
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\font_sf_scale 100
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\font_tt_scale 100
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\graphics default
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\default_output_format default
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\output_sync 0
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\bibtex_command default
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\index_command default
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\paperfontsize default
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\use_hyperref false
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\papersize default
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\use_geometry false
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\use_amsmath 1
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\use_esint 1
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\use_mhchem 1
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\use_mathdots 1
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\cite_engine basic
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\use_bibtopic false
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\use_indices false
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\paperorientation portrait
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\suppress_date false
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\use_refstyle 0
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\index Index
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\shortcut idx
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\color #008000
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\end_index
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\secnumdepth 3
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\tocdepth 3
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\paragraph_separation indent
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\paragraph_indentation default
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\quotes_language english
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\papercolumns 1
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\papersides 1
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\paperpagestyle default
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\tracking_changes false
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\output_changes false
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\html_math_output 0
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\html_css_as_file 0
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\html_be_strict false
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\end_header
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\begin_body
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\begin_layout Title
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GD Scripting Language (GDScript)
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\end_layout
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\begin_layout Section
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Introduction
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\end_layout
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\begin_layout Standard
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GDScript is a high level, dynamically typed programming language used to
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create content.
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It uses a syntax that is very similar to the Python language (blocks are
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indent-based) and it's goal is to be very optimal and tigthly integrated
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with the engine, allowing great flexibility for content creation and integratio
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n.
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\end_layout
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\begin_layout Section
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Example
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\end_layout
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\begin_layout Standard
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Some people can learn better by just taking a look at the syntax, so here's
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a simple example of how it looks.
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\end_layout
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\begin_layout Standard
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\begin_inset listings
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inline false
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status open
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\begin_layout Plain Layout
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#a file is a class!
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\end_layout
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\begin_layout Plain Layout
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\end_layout
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\begin_layout Plain Layout
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#inheritance
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\end_layout
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\begin_layout Plain Layout
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extends BaseClass
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\end_layout
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\begin_layout Plain Layout
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\end_layout
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\begin_layout Plain Layout
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#member variables
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\end_layout
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\begin_layout Plain Layout
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\end_layout
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\begin_layout Plain Layout
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var a=5
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\end_layout
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\begin_layout Plain Layout
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var s="Hello"
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\end_layout
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\begin_layout Plain Layout
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var arr=[1,2,3]
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\end_layout
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\begin_layout Plain Layout
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var dict={"key":"value", 2:3}
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\end_layout
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\begin_layout Plain Layout
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\end_layout
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\begin_layout Plain Layout
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#constants
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\end_layout
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\begin_layout Plain Layout
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\end_layout
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\begin_layout Plain Layout
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const answer=42
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\end_layout
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\begin_layout Plain Layout
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const thename="Charly"
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\end_layout
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\begin_layout Plain Layout
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\end_layout
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\begin_layout Plain Layout
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#built-in vector types
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\end_layout
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\begin_layout Plain Layout
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\end_layout
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\begin_layout Plain Layout
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var v2 = Vector2(1,2)
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\end_layout
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\begin_layout Plain Layout
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var v3 = Vector3(1,2,3)
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\end_layout
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\begin_layout Plain Layout
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\end_layout
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\begin_layout Plain Layout
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#function
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\end_layout
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\begin_layout Plain Layout
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\end_layout
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\begin_layout Plain Layout
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func some_function(param1,param2):
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\end_layout
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\begin_layout Plain Layout
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var local_var=5
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\end_layout
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\begin_layout Plain Layout
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\end_layout
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\begin_layout Plain Layout
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if param1 < local_var:
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\end_layout
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\begin_layout Plain Layout
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print(param1)
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\end_layout
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\begin_layout Plain Layout
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elif param2 > 5:
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\end_layout
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\begin_layout Plain Layout
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print(param2)
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\end_layout
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\begin_layout Plain Layout
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else:
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\end_layout
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\begin_layout Plain Layout
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print("fail!")
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\end_layout
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\begin_layout Plain Layout
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\end_layout
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\begin_layout Plain Layout
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for i in range(20):
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\end_layout
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\begin_layout Plain Layout
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print(i)
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\end_layout
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\begin_layout Plain Layout
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\end_layout
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\begin_layout Plain Layout
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while(param2!=0):
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\end_layout
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\begin_layout Plain Layout
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param2-=1
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\end_layout
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\begin_layout Plain Layout
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\end_layout
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\begin_layout Plain Layout
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var local_var2 = param1+3
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\end_layout
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\begin_layout Plain Layout
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return local_var2
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\end_layout
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\begin_layout Plain Layout
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\end_layout
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\begin_layout Plain Layout
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\end_layout
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\begin_layout Plain Layout
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#subclass
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\end_layout
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\begin_layout Plain Layout
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\end_layout
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\begin_layout Plain Layout
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class Something:
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\end_layout
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\begin_layout Plain Layout
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var a=10
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\end_layout
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\begin_layout Plain Layout
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\end_layout
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\begin_layout Plain Layout
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#constructor
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\end_layout
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\begin_layout Plain Layout
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\end_layout
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\begin_layout Plain Layout
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func _init():
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\end_layout
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\begin_layout Plain Layout
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print("constructed!")
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\end_layout
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\begin_layout Plain Layout
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var lv = Something.new()
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\end_layout
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\begin_layout Plain Layout
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print(lv.a)
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\end_layout
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\begin_layout Plain Layout
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\end_layout
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\begin_layout Plain Layout
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\end_layout
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\end_inset
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\end_layout
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\begin_layout Section
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Language
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\end_layout
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\begin_layout Subsection
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Identifiers
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\end_layout
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\begin_layout Standard
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Any string that restricts itself to alphabetic characters ('a' to 'z' and
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'A' to 'Z'), digits ('0' to '9') and '_' qualifies as an identifier.
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As an extra restriction, identifiers must not begin with a digit.
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Identifiers are case-sensitive ('foo' is different to 'FOO').
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\end_layout
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\begin_layout Subsection
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Keywords
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\end_layout
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\begin_layout Standard
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The following is the list of keywords supported by the language.
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Since keywords are reserved words (tokens), they can't be used as identifiers.
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\end_layout
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\begin_layout Subsection
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Operators
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\end_layout
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\begin_layout Standard
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The following is the list of supported operators and their precedence (TODO,
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change since this was made to reflect python operators)
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\end_layout
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\begin_layout Standard
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\begin_inset Tabular
|
||
|
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<lyxtabular version="3" rows="18" columns="2">
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<features tabularvalignment="middle">
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<column alignment="center" valignment="top" width="0">
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<column alignment="center" valignment="top" width="0">
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<row>
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<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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Operator
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" rightline="true" usebox="none">
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\begin_inset Text
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||
|
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|
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|
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\begin_layout Plain Layout
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||
|
|
Note
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|
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\end_layout
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||
|
|
|
||
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\end_inset
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||
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</cell>
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</row>
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<row>
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<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
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|
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\begin_inset Text
|
||
|
|
|
||
|
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\begin_layout Plain Layout
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x[index]
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\end_layout
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|
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\end_inset
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||
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
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||
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|
\begin_inset Text
|
||
|
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||
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\begin_layout Plain Layout
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Subscription, Highest Priority
|
||
|
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\end_layout
|
||
|
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|
||
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\end_inset
|
||
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</cell>
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||
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</row>
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||
|
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<row>
|
||
|
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<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
x.attribute
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
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</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Attribute Reference
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
extends
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Instance Type Checker
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
~
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Bitwise NOT
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
-x
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Negative
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
* / %
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Mult / Div / Remainder
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
+ -
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Addition / Substraction
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
<< >>
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Bit Shifting
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
&
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Bitwise AND
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
^
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Bitwise XOR
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Bitwise OR
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
< > == != >= <=
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Comparisons
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
in
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Content Test
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
! not
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Boolean NOT
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
and &&
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Boolean AND
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
or ||
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Boolean OR
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
= += -= *= /= ^= &= |=
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Assignment, Lowest Priority
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
</lyxtabular>
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Literals
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset Tabular
|
||
|
|
<lyxtabular version="3" rows="6" columns="2">
|
||
|
|
<features tabularvalignment="middle">
|
||
|
|
<column alignment="center" valignment="top" width="0">
|
||
|
|
<column alignment="center" valignment="top" width="0">
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Literal
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Name
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
45
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Base 10 Integer
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
0x8F51
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Base 16 (hex) Integer
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
3.14, 58.1e-10
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Floating Point Number (real)
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
'Hello',
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
Hi
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Strings
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
@'Hello', @'Hi'
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" rightline="true" usebox="none">
|
||
|
|
\begin_inset Text
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
Internationalized Strings
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
</cell>
|
||
|
|
</row>
|
||
|
|
</lyxtabular>
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Comments
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Anything from a '#' to the end of the line is ignored and is considered
|
||
|
|
a comment.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset listings
|
||
|
|
lstparams "language=Python"
|
||
|
|
inline false
|
||
|
|
status open
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
# This is a comment
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Section
|
||
|
|
Built-in Types
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Basic Bult-In Types
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
A variable in GDScript can be assigned many of several built-in types.
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
null
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
'null' is a data type that contains no information, nothing assigned, and
|
||
|
|
it's just empy.
|
||
|
|
It can only be set to one value: 'null'.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
bool
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Boolean data type, can only contain 'true' or 'false'.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
int
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Integer data type, can only contain integer numbers, negative and positive.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
float
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
contains a floating point value (real).
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
String
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Sequence of characters in unicode format.
|
||
|
|
Strings can contain the standard C escape sequences.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Vector Built-In Types
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
Vector2/Size2
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
2D vector type, containing x and y fields.
|
||
|
|
Can alternatively access fields as width and height for readability.
|
||
|
|
Can also be accessed as array.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
Rect2
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
2D Rectangle type.
|
||
|
|
Contains 2 vectors fields,
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
pos
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
and size
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
.
|
||
|
|
Alternatively contains an
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
end
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
field which is
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
pos+size
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
Vector3
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
3D vector type.
|
||
|
|
Contains x, y and z fields.
|
||
|
|
Can also be accessed as array.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
Matrix32
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
3x2 matrix used for 2D transforms.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
Plane
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
3D Plane type in normalized form.
|
||
|
|
Contains a
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
normal
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
vector field and a
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
d
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
scalar distance.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
Quat
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Quaternion, datatype used for representing a 3D rotation.
|
||
|
|
It's useful for interpolating rotations.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
AABB/Box3
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Axis Aligned bounding box (or alternatively, 3D box).
|
||
|
|
Contains 2 vectors fields,
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
pos
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
and size
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
.
|
||
|
|
Alternatively contains an
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
end
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
field which is
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
pos+size
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
Matrix3
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
3x3 matrix used for 3D rotation and scale.
|
||
|
|
Contains 3 vector fields x,y and z.
|
||
|
|
Can also be accessed as array of 3D vectors.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
Transform
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
3D Transform, contains a Matrix3 field
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
basis
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
and a Vector3 field
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
origin
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Engine Built-In Types
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
Color
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Color datatype, contains r,g,b,a fields.
|
||
|
|
Can also be accessed as h,s,v for hue/saturation/value.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
Image
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Contains a 2D Image of custom format and allows direct access to the pixels.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
NodePath
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Compiled path to a node, used mainly in the scene system.
|
||
|
|
Can be easily asigned from/to a String.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
RID
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Resource ID (RID).
|
||
|
|
Servers use generic RIDs to reference opaque data.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
Object
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Base class for anything not a built-in type.
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
InputEvent
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Events from input devices are contained in very compact form in InputEvent
|
||
|
|
objects.
|
||
|
|
Due to fact they can be received in high amounts from frame to frame, they
|
||
|
|
are optimized in their own datatype.
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Container Built-In Types
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
Array
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Generic sequence of objects.
|
||
|
|
It's size can be changed to anything and starts from index 0.
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset listings
|
||
|
|
inline false
|
||
|
|
status open
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
var arr=[]
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
arr=[1,2,3]
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
arr[0]="Hi!"
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Arrays are allocated linearly in memory, so they are fast, but very large
|
||
|
|
arrays (more than tens of thousands of elements) may cause fragmentation.
|
||
|
|
There are specialized arrays for some built-in datatypes which do not suffer
|
||
|
|
from this and use much less memory.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
Dictionary
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Associative container which contains values referenced by unique keys.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset listings
|
||
|
|
inline false
|
||
|
|
status open
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
var dict={4:5, "a key":"a value", 28:[1,2,3]}
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
dict["Hi!"]=0
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
ByteArray
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Array of bytes.
|
||
|
|
Can only contains bytes (integers from 0 to 255).
|
||
|
|
Optimized for memory usage, can't fragment the memory.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
IntArray
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Array of integers.
|
||
|
|
Can only contain integers.
|
||
|
|
Optimized for memory usage, can't fragment the memory.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
FloatArray
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Array of floats, can only contain floats.
|
||
|
|
Optimized for memory usage, can't fragment the memory.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
StringArray
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Array of strings, can only contain strings.
|
||
|
|
Optimized for memory usage, can't fragment the memory.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
Vector2Array
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Array of Vector2, can only contain 2D Vectors.
|
||
|
|
Optimized for memory usage, can't fragment the memory.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
Vector3Array
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Array of Vector3, can only contain 3D Vectors.
|
||
|
|
Optimized for memory usage, can't fragment the memory.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
ColorArray
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Array of Color, can only contains colors.
|
||
|
|
Optimized for memory usage, can't fragment the memory.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Section
|
||
|
|
Data
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Variables
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Variables can exist as class members or local to functions.
|
||
|
|
They are created with the
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
var
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
keyword and may be, optionally, be assigned a value upon initialization.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset listings
|
||
|
|
inline false
|
||
|
|
status open
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
var a # datatype is null by default
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
var b = 5
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
var c = 3.8
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
var d = b+c # variables are always initialized in order
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Constants
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Constants are similar to variables, but must be constants or constant expression
|
||
|
|
s and must be assigned on initialization.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset listings
|
||
|
|
inline false
|
||
|
|
status open
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
const a = 5
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
const b = Vector2(20,20)
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
const c = 10+20 # constant expression
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
const d = Vector2(20,30).x # constant expression: 20
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
const e = [1,2,3,4][0] # constant expression: 1
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
const f = sin(20) # sin() can be used in constant expression
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
const g = x+20 # invalid, not a constant expression!
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Functions
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Functions always belong to a class.
|
||
|
|
The scope priority for variable look-up is: local -> class member -> global.
|
||
|
|
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
self
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
is provided as an option for accessing class members but is not required
|
||
|
|
always (and must
|
||
|
|
\emph on
|
||
|
|
not
|
||
|
|
\emph default
|
||
|
|
be defined as first parameter, like in Python).
|
||
|
|
For performance reasons, functions are not considered class members, so
|
||
|
|
they can't be referenced directly.
|
||
|
|
A function can return at any point.
|
||
|
|
The default return value is null.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset listings
|
||
|
|
inline false
|
||
|
|
status open
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
func myfunction(a,b):
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
print(a)
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
print(b)
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
return a+b # return is optional, otherwise null is returned
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
Statements and Control Flow
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Statements are standard, and can be assignments, function calls, control
|
||
|
|
flow structures, etc (see below).
|
||
|
|
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
;
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
as separator is entirely optional.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
if/else/elif
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Simple conditions are created by using the
|
||
|
|
\emph on
|
||
|
|
if/else/elif
|
||
|
|
\emph default
|
||
|
|
syntax.
|
||
|
|
Parenthesis around statements is allowed but not requiered.
|
||
|
|
Given the nature of the tab-based indentation, elif can be used instead
|
||
|
|
of else:/if: to mantain a level of indentation.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset listings
|
||
|
|
inline false
|
||
|
|
status open
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
if [expression]:
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
statement(s)
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
elif [expression]:
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
statement(s)
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
else:
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
statement(s)
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
while
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Simple loops are created by using
|
||
|
|
\emph on
|
||
|
|
while
|
||
|
|
\emph default
|
||
|
|
syntax.
|
||
|
|
Loops can be broken using
|
||
|
|
\emph on
|
||
|
|
break
|
||
|
|
\emph default
|
||
|
|
, or continued using
|
||
|
|
\emph on
|
||
|
|
continue
|
||
|
|
\emph default
|
||
|
|
:
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset listings
|
||
|
|
inline false
|
||
|
|
status open
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
while [expression]:
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
statement(s)
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsubsection
|
||
|
|
for
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
To iterate a range, array or table a
|
||
|
|
\emph on
|
||
|
|
for
|
||
|
|
\emph default
|
||
|
|
loop is used.
|
||
|
|
For loops store the index in the loop variable on each iteration.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset listings
|
||
|
|
inline false
|
||
|
|
status open
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
for i in [0,1,2]:
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
statement # loop iterates 3 times, i being 0,1 and 2
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
var dict = {"a":0, "b":1, "c": 2}
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
for i in dict:
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
print(dict[i]) # loop iterates the keys, i being "a","b" and c".
|
||
|
|
It prints 0, 1 and 2.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
for i in range(3):
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
statement # similar to [0,1,2] but does not allocate an array
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
for i in range(1,3):
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
statement # similar to [1,2] but does not allocate an array
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
for i in range(2,8,2):
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
statement # similar to [2,4,6] but does not allocate an array
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Section
|
||
|
|
Classes
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
By default, the body of a script file is an unnamed class, and it can only
|
||
|
|
be referenced externally as a resource or file.
|
||
|
|
Class syntax is meant to be very compact and can only contain member variables
|
||
|
|
or functions.
|
||
|
|
Static functions are allowed, but not static members (in the spirit of
|
||
|
|
thread safety, since scripts can be initialized in separate threads without
|
||
|
|
the user knowing).
|
||
|
|
In the same way, member variables (including arrays and dictionaries) are
|
||
|
|
initialized every time an instance is created.
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Class File Example
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Example of a class file, imagine it being stored in a file like myclass.gd.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset listings
|
||
|
|
inline false
|
||
|
|
status open
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
var a=5
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
function print_value_of_a():
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
print(a)
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Inheritance
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
A class-file can inherit from a global class, another file or a subclass
|
||
|
|
inside another file.
|
||
|
|
Multiple inheritance is not allowed.
|
||
|
|
The
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
extends
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
syntax is used:
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset listings
|
||
|
|
inline false
|
||
|
|
status open
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
# extend from some class (global)
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
extends SomeClass
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
# optionally, extend from another file
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
extends "somefile.gd"
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
# extend from a subclass in another file
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
extends "somefile.gd".Subclass
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Inheritance Testing
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
It is possible to check if an instance inherits from a given class.
|
||
|
|
For this the
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
extends
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
keyword can be used as an operator instead:
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset listings
|
||
|
|
inline false
|
||
|
|
status open
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
static var enemy_class = preload("enemy.gd") # cache the enemy class
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
[..]
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
if ( entity extends enemy_class ):
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
entity.apply_damage()
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Constructor
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
A class can have an optional constructor, a function named
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
_init
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
that is called when the class is instanced.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Sub Classes
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
A class file can have subclasses.
|
||
|
|
Syntax should be straightforward:
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset listings
|
||
|
|
inline false
|
||
|
|
status open
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
class SomeSubClass:
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
var a=5
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
function print_value_of_a():
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
print(a)
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
function _init():
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
var sc = SomeSubClass.new() #instance by calling built-in new
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
sc.print_value_of_a()
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Classes as Objects
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
It may be desired at some point to load a class from a file and then instance
|
||
|
|
it.
|
||
|
|
Since the global scope does not exist, classes must be loaded as a resource.
|
||
|
|
Instancing is done by calling the
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
new
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
function in a class object:
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset listings
|
||
|
|
inline false
|
||
|
|
status open
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
#load the class (loaded every time the script is instanced)
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
var MyClass = load("myclass.gd")
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
#alternatively, using the preload() function preloads the class at compile
|
||
|
|
time
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
var MyClass2 = preload("myclass.gd")
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
function _init():
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
var a = MyClass.new()
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
a.somefunction()
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Exports
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Class members can be exported.
|
||
|
|
This means their value gets saved along with a scene.
|
||
|
|
If class members have initializers to constant expressions, they will be
|
||
|
|
available for editing in the property editor.
|
||
|
|
Exporting is done by using the export keyword:
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset listings
|
||
|
|
inline false
|
||
|
|
status open
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
extends Button
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
export var data # value will be saved
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
export var number=5 # also available to the property editor
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
One of the fundamental benefits of exporting member variables is to have
|
||
|
|
them visible in the property editor.
|
||
|
|
This way artists and game designers can modify values that later influence
|
||
|
|
how the program runs.
|
||
|
|
For this, a special export syntax is provided for more detail in the exported
|
||
|
|
variables:
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset listings
|
||
|
|
inline false
|
||
|
|
status open
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
#if the exported value assigns a constant or constant expression, the type
|
||
|
|
will be infered and used in the editor
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
export var number=5
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
#export can take a basic datatype as argument, which will be used in the
|
||
|
|
editor
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
export(int) var number
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
#export can also take a resource type as hint
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
export(Texture) var character_face
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
#integers and strings hint enumerated values
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
export(int,"Warrior","Magician","Thief") var character_class # (editor will
|
||
|
|
set them as 0,1 and 2)
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
export(String,"Rebecca","Mary","Leah") var character_name
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
#strings as paths
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
export(String,FILE) var f # string is a path to a file
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
export(String,DIR) var f # string is a path to a directory
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
export(String,FILE,"*.txt") var f # string is a path to a file, custom filter
|
||
|
|
provided as hint
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
#integers and floats hint ranges
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
export(int,20) var i # 0 to 20 allowed
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
export(int,-10,20) var j # -10 to 20 allowed
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
export(float,-10,20,0.2) var k # -10 to 20 allowed, with stepping of 0.2
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
#color can hint availability of alpha
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
export(Color,RGB) var col # Color is RGB
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
export(Color,RGBA) var col # Color is RGBA
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
It must be noted that even if the script is not being run while at the editor,
|
||
|
|
the exported properties are still editable (see below for
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
tool
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
).
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Static Functions
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
A function can be declared static.
|
||
|
|
When static, it has no access to the instance member variables or
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
self
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
.
|
||
|
|
This is mainly useful to make libraries of helper functions:
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset listings
|
||
|
|
inline false
|
||
|
|
status open
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
static func sum2(a,b):
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
return a+b
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Asserting
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
It is possible to assert a condition, which will cause a debugger break
|
||
|
|
if false.
|
||
|
|
Just use the built-in 'assert' function.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset listings
|
||
|
|
inline false
|
||
|
|
status open
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
assert(a==2)
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
# if a is not 2, it will generate a debugger break
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Tool Mode
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Scripts by default don't run inside the editor, and only the exported properties
|
||
|
|
can be changed.
|
||
|
|
In some cases it is desired that they do (as long as they don't execute
|
||
|
|
game code or manually avoid doing so).
|
||
|
|
For this, the
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
tool
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
keyword exists, and must be placed at the top of the file:
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset listings
|
||
|
|
inline false
|
||
|
|
status open
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
tool
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
extends Button
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
func _init():
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
print("Hello")
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Memory Management
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
If a class inherits from
|
||
|
|
\emph on
|
||
|
|
Reference
|
||
|
|
\emph default
|
||
|
|
, then instances will be freed when no longer in use.
|
||
|
|
No garbage collector exists, just simple reference counting.
|
||
|
|
By default, all classes that don't define inheritance extend
|
||
|
|
\emph on
|
||
|
|
Reference
|
||
|
|
\emph default
|
||
|
|
.
|
||
|
|
If this is not desired, then a class must inherit
|
||
|
|
\emph on
|
||
|
|
Object
|
||
|
|
\emph default
|
||
|
|
manually and must call instance.free().
|
||
|
|
To avoid reference cycles that can't be freed, a weakref() function is
|
||
|
|
provided for creating weak references.
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Subsection
|
||
|
|
Function References
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
Functions can't be referenced because they are not treated as class members.
|
||
|
|
There are two alternatives to this, though.
|
||
|
|
The
|
||
|
|
\begin_inset Quotes eld
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
call
|
||
|
|
\begin_inset Quotes erd
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
function or the funcref() helper.
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Standard
|
||
|
|
\begin_inset listings
|
||
|
|
inline false
|
||
|
|
status open
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
instance.call("funcname",args) # call a function by bane
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
var fr = funcref(instance,"funcname") #create a function ref
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\begin_layout Plain Layout
|
||
|
|
|
||
|
|
fr.exec(args)
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_inset
|
||
|
|
|
||
|
|
|
||
|
|
\end_layout
|
||
|
|
|
||
|
|
\end_body
|
||
|
|
\end_document
|