61 lines
3.3 KiB
XML
61 lines
3.3 KiB
XML
<?xml version="1.0" encoding="UTF-8" ?>
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<class name="HeightMapShape3D" inherits="Shape3D" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
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<brief_description>
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A 3D height map shape used for physics collision.
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</brief_description>
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<description>
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A 3D heightmap shape, intended for use in physics. Usually used to provide a shape for a [CollisionShape3D]. This is useful for terrain, but it is limited as overhangs (such as caves) cannot be stored. Holes in a [HeightMapShape3D] are created by assigning very low values to points in the desired area.
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[b]Performance:[/b] [HeightMapShape3D] is faster to check collisions against than [ConcavePolygonShape3D], but it is significantly slower than primitive shapes like [BoxShape3D].
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A heightmap collision shape can also be build by using an [Image] reference:
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[codeblocks]
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[gdscript]
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var heightmap_texture: Texture = ResourceLoader.load("res://heightmap_image.exr")
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var heightmap_image: Image = heightmap_texture.get_image()
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heightmap_image.convert(Image.FORMAT_RF)
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var height_min: float = 0.0
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var height_max: float = 10.0
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update_map_data_from_image(heightmap_image, height_min, height_max)
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[/gdscript]
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[/codeblocks]
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</description>
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<tutorials>
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</tutorials>
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<methods>
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<method name="get_max_height" qualifiers="const">
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<return type="float" />
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<description>
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Returns the largest height value found in [member map_data]. Recalculates only when [member map_data] changes.
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</description>
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</method>
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<method name="get_min_height" qualifiers="const">
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<return type="float" />
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<description>
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Returns the smallest height value found in [member map_data]. Recalculates only when [member map_data] changes.
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</description>
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</method>
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<method name="update_map_data_from_image">
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<return type="void" />
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<param index="0" name="image" type="Image" />
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<param index="1" name="height_min" type="float" />
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<param index="2" name="height_max" type="float" />
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<description>
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Updates [member map_data] with data read from an [Image] reference. Automatically resizes heightmap [member map_width] and [member map_depth] to fit the full image width and height.
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The image needs to be in either [constant Image.FORMAT_RF] (32 bit), [constant Image.FORMAT_RH] (16 bit), or [constant Image.FORMAT_R8] (8 bit).
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Each image pixel is read in as a float on the range from [code]0.0[/code] (black pixel) to [code]1.0[/code] (white pixel). This range value gets remapped to [param height_min] and [param height_max] to form the final height value.
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</description>
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</method>
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</methods>
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<members>
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<member name="map_data" type="PackedFloat32Array" setter="set_map_data" getter="get_map_data" default="PackedFloat32Array(0, 0, 0, 0)">
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Height map data. The array's size must be equal to [member map_width] multiplied by [member map_depth].
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</member>
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<member name="map_depth" type="int" setter="set_map_depth" getter="get_map_depth" default="2">
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Number of vertices in the depth of the height map. Changing this will resize the [member map_data].
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</member>
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<member name="map_width" type="int" setter="set_map_width" getter="get_map_width" default="2">
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Number of vertices in the width of the height map. Changing this will resize the [member map_data].
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</member>
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</members>
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</class>
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