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virtualx-engine/scene/2d/camera_2d.cpp
Rémi Verschelde d8223ffa75 Welcome in 2017, dear changelog reader! 
That year should bring the long-awaited OpenGL ES 3.0 compatible renderer
with state-of-the-art rendering techniques tuned to work as low as middle
end handheld devices - without compromising with the possibilities given
for higher end desktop games of course. Great times ahead for the Godot
community and the gamers that will play our games!

(cherry picked from commit c7bc44d5ad)
2017-01-12 19:15:30 +01:00

638 lines
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/*************************************************************************/
/* camera_2d.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "camera_2d.h"
#include "scene/scene_string_names.h"
#include "servers/visual_server.h"
void Camera2D::_update_scroll() {
if (!is_inside_tree())
return;
if (get_tree()->is_editor_hint()) {
update(); //will just be drawn
return;
}
if (current) {
Matrix32 xform = get_camera_transform();
if (viewport) {
viewport->set_canvas_transform( xform );
}
get_tree()->call_group(SceneTree::GROUP_CALL_REALTIME,group_name,"_camera_moved",xform);
};
}
void Camera2D::set_zoom(const Vector2 &p_zoom) {
zoom = p_zoom;
Point2 old_smoothed_camera_pos = smoothed_camera_pos;
_update_scroll();
smoothed_camera_pos = old_smoothed_camera_pos;
};
Vector2 Camera2D::get_zoom() const {
return zoom;
};
Matrix32 Camera2D::get_camera_transform() {
if (!get_tree())
return Matrix32();
Size2 screen_size = get_viewport_rect().size;
screen_size=get_viewport_rect().size;
Point2 new_camera_pos = get_global_transform().get_origin();
Point2 ret_camera_pos;
if (!first) {
if (anchor_mode==ANCHOR_MODE_DRAG_CENTER) {
if (h_drag_enabled && !get_tree()->is_editor_hint()) {
camera_pos.x = MIN( camera_pos.x, (new_camera_pos.x + screen_size.x * 0.5 * drag_margin[MARGIN_RIGHT]));
camera_pos.x = MAX( camera_pos.x, (new_camera_pos.x - screen_size.x * 0.5 * drag_margin[MARGIN_LEFT]));
} else {
if (h_ofs<0) {
camera_pos.x = new_camera_pos.x + screen_size.x * 0.5 * drag_margin[MARGIN_RIGHT] * h_ofs;
} else {
camera_pos.x = new_camera_pos.x + screen_size.x * 0.5 * drag_margin[MARGIN_LEFT] * h_ofs;
}
}
if (v_drag_enabled && !get_tree()->is_editor_hint()) {
camera_pos.y = MIN( camera_pos.y, (new_camera_pos.y + screen_size.y * 0.5 * drag_margin[MARGIN_BOTTOM]));
camera_pos.y = MAX( camera_pos.y, (new_camera_pos.y - screen_size.y * 0.5 * drag_margin[MARGIN_TOP]));
} else {
if (v_ofs<0) {
camera_pos.y = new_camera_pos.y + screen_size.y * 0.5 * drag_margin[MARGIN_TOP] * v_ofs;
} else {
camera_pos.y = new_camera_pos.y + screen_size.y * 0.5 * drag_margin[MARGIN_BOTTOM] * v_ofs;
}
}
} else if (anchor_mode==ANCHOR_MODE_FIXED_TOP_LEFT){
camera_pos=new_camera_pos;
}
if (smoothing_enabled && !get_tree()->is_editor_hint()) {
float c = smoothing*get_fixed_process_delta_time();
smoothed_camera_pos = ((camera_pos-smoothed_camera_pos)*c)+smoothed_camera_pos;
ret_camera_pos=smoothed_camera_pos;
// camera_pos=camera_pos*(1.0-smoothing)+new_camera_pos*smoothing;
} else {
ret_camera_pos=smoothed_camera_pos=camera_pos;
}
} else {
ret_camera_pos=smoothed_camera_pos=camera_pos=new_camera_pos;
first=false;
}
Point2 screen_offset = (anchor_mode==ANCHOR_MODE_DRAG_CENTER ? (screen_size * 0.5 * zoom) : Point2());
float angle = get_global_transform().get_rotation();
if(rotating){
screen_offset = screen_offset.rotated(angle);
}
Rect2 screen_rect(-screen_offset+ret_camera_pos,screen_size*zoom);
if (screen_rect.pos.x + screen_rect.size.x > limit[MARGIN_RIGHT])
screen_rect.pos.x = limit[MARGIN_RIGHT] - screen_rect.size.x;
if (screen_rect.pos.y + screen_rect.size.y > limit[MARGIN_BOTTOM])
screen_rect.pos.y = limit[MARGIN_BOTTOM] - screen_rect.size.y;
if (screen_rect.pos.x < limit[MARGIN_LEFT])
screen_rect.pos.x=limit[MARGIN_LEFT];
if (screen_rect.pos.y < limit[MARGIN_TOP])
screen_rect.pos.y =limit[MARGIN_TOP];
if (offset!=Vector2()) {
screen_rect.pos+=offset;
if (screen_rect.pos.x + screen_rect.size.x > limit[MARGIN_RIGHT])
screen_rect.pos.x = limit[MARGIN_RIGHT] - screen_rect.size.x;
if (screen_rect.pos.y + screen_rect.size.y > limit[MARGIN_BOTTOM])
screen_rect.pos.y = limit[MARGIN_BOTTOM] - screen_rect.size.y;
if (screen_rect.pos.x < limit[MARGIN_LEFT])
screen_rect.pos.x=limit[MARGIN_LEFT];
if (screen_rect.pos.y < limit[MARGIN_TOP])
screen_rect.pos.y =limit[MARGIN_TOP];
}
camera_screen_center=screen_rect.pos+screen_rect.size*0.5;
Matrix32 xform;
if(rotating){
xform.set_rotation(angle);
}
xform.scale_basis(zoom);
xform.set_origin(screen_rect.pos/*.floor()*/);
/*
if (0) {
xform = get_global_transform() * xform;
} else {
xform.elements[2]+=get_global_transform().get_origin();
}
*/
return (xform).affine_inverse();
}
void Camera2D::_notification(int p_what) {
switch(p_what) {
case NOTIFICATION_FIXED_PROCESS: {
_update_scroll();
} break;
case NOTIFICATION_TRANSFORM_CHANGED: {
if (!is_fixed_processing())
_update_scroll();
} break;
case NOTIFICATION_ENTER_TREE: {
viewport = NULL;
Node *n=this;
while(n){
viewport = n->cast_to<Viewport>();
if (viewport)
break;
n=n->get_parent();
}
canvas = get_canvas();
RID vp = viewport->get_viewport();
group_name = "__cameras_"+itos(vp.get_id());
canvas_group_name ="__cameras_c"+itos(canvas.get_id());
add_to_group(group_name);
add_to_group(canvas_group_name);
if(get_tree()->is_editor_hint()) {
set_fixed_process(false);
}
_update_scroll();
first=true;
} break;
case NOTIFICATION_EXIT_TREE: {
if (is_current()) {
if (viewport) {
viewport->set_canvas_transform( Matrix32() );
}
}
remove_from_group(group_name);
remove_from_group(canvas_group_name);
viewport=NULL;
} break;
case NOTIFICATION_DRAW: {
if (!is_inside_tree() || !get_tree()->is_editor_hint())
break;
Color area_axis_color(0.5, 0.42, 0.87, 0.63);
float area_axis_width = 1;
if(current)
area_axis_width = 3;
Matrix32 inv_camera_transform = get_camera_transform().affine_inverse();
Size2 screen_size = get_viewport_rect().size;
Vector2 screen_endpoints[4]= {
inv_camera_transform.xform(Vector2(0, 0)),
inv_camera_transform.xform(Vector2(screen_size.width,0)),
inv_camera_transform.xform(Vector2(screen_size.width, screen_size.height)),
inv_camera_transform.xform(Vector2(0, screen_size.height))
};
Matrix32 inv_transform = get_global_transform().affine_inverse(); // undo global space
for(int i=0;i<4;i++) {
draw_line(inv_transform.xform(screen_endpoints[i]), inv_transform.xform(screen_endpoints[(i+1)%4]), area_axis_color, area_axis_width);
}
} break;
}
}
void Camera2D::set_offset(const Vector2& p_offset) {
offset=p_offset;
_update_scroll();
}
Vector2 Camera2D::get_offset() const{
return offset;
}
void Camera2D::set_anchor_mode(AnchorMode p_anchor_mode){
anchor_mode=p_anchor_mode;
_update_scroll();
}
Camera2D::AnchorMode Camera2D::get_anchor_mode() const {
return anchor_mode;
}
void Camera2D::set_rotating(bool p_rotating){
rotating=p_rotating;
_update_scroll();
}
bool Camera2D::is_rotating() const {
return rotating;
}
void Camera2D::_make_current(Object *p_which) {
if (p_which==this) {
current=true;
_update_scroll();
} else {
current=false;
}
}
void Camera2D::_set_current(bool p_current) {
if (p_current)
make_current();
current=p_current;
}
bool Camera2D::is_current() const {
return current;
}
void Camera2D::make_current() {
if (!is_inside_tree()) {
current=true;
} else {
get_tree()->call_group(SceneTree::GROUP_CALL_REALTIME,group_name,"_make_current",this);
}
}
void Camera2D::clear_current() {
current=false;
if (is_inside_tree()) {
get_tree()->call_group(SceneTree::GROUP_CALL_REALTIME,group_name,"_make_current",(Object*)(NULL));
}
}
void Camera2D::set_limit(Margin p_margin,int p_limit) {
ERR_FAIL_INDEX(p_margin,4);
limit[p_margin]=p_limit;
}
int Camera2D::get_limit(Margin p_margin) const{
ERR_FAIL_INDEX_V(p_margin,4,0);
return limit[p_margin];
}
void Camera2D::set_drag_margin(Margin p_margin,float p_drag_margin) {
ERR_FAIL_INDEX(p_margin,4);
drag_margin[p_margin]=p_drag_margin;
}
float Camera2D::get_drag_margin(Margin p_margin) const{
ERR_FAIL_INDEX_V(p_margin,4,0);
return drag_margin[p_margin];
}
Vector2 Camera2D::get_camera_pos() const {
return camera_pos;
}
void Camera2D::force_update_scroll() {
_update_scroll();
}
void Camera2D::reset_smoothing() {
smoothed_camera_pos = camera_pos;
_update_scroll();
}
void Camera2D::align() {
Size2 screen_size = get_viewport_rect().size;
screen_size=get_viewport_rect().size;
Point2 current_camera_pos = get_global_transform().get_origin();
if (anchor_mode==ANCHOR_MODE_DRAG_CENTER) {
if (h_ofs<0) {
camera_pos.x = current_camera_pos.x + screen_size.x * 0.5 * drag_margin[MARGIN_RIGHT] * h_ofs;
} else {
camera_pos.x = current_camera_pos.x + screen_size.x * 0.5 * drag_margin[MARGIN_LEFT] * h_ofs;
}
if (v_ofs<0) {
camera_pos.y = current_camera_pos.y + screen_size.y * 0.5 * drag_margin[MARGIN_TOP] * v_ofs;
} else {
camera_pos.y = current_camera_pos.y + screen_size.y * 0.5 * drag_margin[MARGIN_BOTTOM] * v_ofs;
}
} else if (anchor_mode==ANCHOR_MODE_FIXED_TOP_LEFT){
camera_pos=current_camera_pos;
}
_update_scroll();
}
void Camera2D::set_follow_smoothing(float p_speed) {
smoothing=p_speed;
if (smoothing>0 && !(is_inside_tree() && get_tree()->is_editor_hint()))
set_fixed_process(true);
else
set_fixed_process(false);
}
float Camera2D::get_follow_smoothing() const{
return smoothing;
}
Point2 Camera2D::get_camera_screen_center() const {
return camera_screen_center;
}
void Camera2D::set_h_drag_enabled(bool p_enabled) {
h_drag_enabled=p_enabled;
}
bool Camera2D::is_h_drag_enabled() const{
return h_drag_enabled;
}
void Camera2D::set_v_drag_enabled(bool p_enabled){
v_drag_enabled=p_enabled;
}
bool Camera2D::is_v_drag_enabled() const{
return v_drag_enabled;
}
void Camera2D::set_v_offset(float p_offset) {
v_ofs=p_offset;
}
float Camera2D::get_v_offset() const{
return v_ofs;
}
void Camera2D::set_h_offset(float p_offset){
h_ofs=p_offset;
}
float Camera2D::get_h_offset() const{
return h_ofs;
}
void Camera2D::_set_old_smoothing(float p_val) {
//compatibility
if (p_val>0) {
smoothing_enabled=true;
set_follow_smoothing(p_val);
}
}
void Camera2D::set_enable_follow_smoothing(bool p_enabled) {
smoothing_enabled=p_enabled;
}
bool Camera2D::is_follow_smoothing_enabled() const {
return smoothing_enabled;
}
void Camera2D::_bind_methods() {
ObjectTypeDB::bind_method(_MD("set_offset","offset"),&Camera2D::set_offset);
ObjectTypeDB::bind_method(_MD("get_offset"),&Camera2D::get_offset);
ObjectTypeDB::bind_method(_MD("set_anchor_mode","anchor_mode"),&Camera2D::set_anchor_mode);
ObjectTypeDB::bind_method(_MD("get_anchor_mode"),&Camera2D::get_anchor_mode);
ObjectTypeDB::bind_method(_MD("set_rotating","rotating"),&Camera2D::set_rotating);
ObjectTypeDB::bind_method(_MD("is_rotating"),&Camera2D::is_rotating);
ObjectTypeDB::bind_method(_MD("make_current"),&Camera2D::make_current);
ObjectTypeDB::bind_method(_MD("clear_current"),&Camera2D::clear_current);
ObjectTypeDB::bind_method(_MD("_make_current"),&Camera2D::_make_current);
ObjectTypeDB::bind_method(_MD("_update_scroll"),&Camera2D::_update_scroll);
ObjectTypeDB::bind_method(_MD("_set_current","current"),&Camera2D::_set_current);
ObjectTypeDB::bind_method(_MD("is_current"),&Camera2D::is_current);
ObjectTypeDB::bind_method(_MD("set_limit","margin","limit"),&Camera2D::set_limit);
ObjectTypeDB::bind_method(_MD("get_limit","margin"),&Camera2D::get_limit);
ObjectTypeDB::bind_method(_MD("set_v_drag_enabled","enabled"),&Camera2D::set_v_drag_enabled);
ObjectTypeDB::bind_method(_MD("is_v_drag_enabled"),&Camera2D::is_v_drag_enabled);
ObjectTypeDB::bind_method(_MD("set_h_drag_enabled","enabled"),&Camera2D::set_h_drag_enabled);
ObjectTypeDB::bind_method(_MD("is_h_drag_enabled"),&Camera2D::is_h_drag_enabled);
ObjectTypeDB::bind_method(_MD("set_v_offset","ofs"),&Camera2D::set_v_offset);
ObjectTypeDB::bind_method(_MD("get_v_offset"),&Camera2D::get_v_offset);
ObjectTypeDB::bind_method(_MD("set_h_offset","ofs"),&Camera2D::set_h_offset);
ObjectTypeDB::bind_method(_MD("get_h_offset"),&Camera2D::get_h_offset);
ObjectTypeDB::bind_method(_MD("set_drag_margin","margin","drag_margin"),&Camera2D::set_drag_margin);
ObjectTypeDB::bind_method(_MD("get_drag_margin","margin"),&Camera2D::get_drag_margin);
ObjectTypeDB::bind_method(_MD("get_camera_pos"),&Camera2D::get_camera_pos);
ObjectTypeDB::bind_method(_MD("get_camera_screen_center"),&Camera2D::get_camera_screen_center);
ObjectTypeDB::bind_method(_MD("set_zoom","zoom"),&Camera2D::set_zoom);
ObjectTypeDB::bind_method(_MD("get_zoom"),&Camera2D::get_zoom);
ObjectTypeDB::bind_method(_MD("set_follow_smoothing","follow_smoothing"),&Camera2D::set_follow_smoothing);
ObjectTypeDB::bind_method(_MD("get_follow_smoothing"),&Camera2D::get_follow_smoothing);
ObjectTypeDB::bind_method(_MD("set_enable_follow_smoothing","follow_smoothing"),&Camera2D::set_enable_follow_smoothing);
ObjectTypeDB::bind_method(_MD("is_follow_smoothing_enabled"),&Camera2D::is_follow_smoothing_enabled);
ObjectTypeDB::bind_method(_MD("force_update_scroll"),&Camera2D::force_update_scroll);
ObjectTypeDB::bind_method(_MD("reset_smoothing"),&Camera2D::reset_smoothing);
ObjectTypeDB::bind_method(_MD("align"),&Camera2D::align);
ObjectTypeDB::bind_method(_MD("_set_old_smoothing","follow_smoothing"),&Camera2D::_set_old_smoothing);
ADD_PROPERTYNZ( PropertyInfo(Variant::VECTOR2,"offset"),_SCS("set_offset"),_SCS("get_offset"));
ADD_PROPERTY( PropertyInfo(Variant::INT,"anchor_mode",PROPERTY_HINT_ENUM,"Fixed TopLeft,Drag Center"),_SCS("set_anchor_mode"),_SCS("get_anchor_mode"));
ADD_PROPERTY( PropertyInfo(Variant::BOOL,"rotating"),_SCS("set_rotating"),_SCS("is_rotating"));
ADD_PROPERTY( PropertyInfo(Variant::BOOL,"current"),_SCS("_set_current"),_SCS("is_current"));
ADD_PROPERTY( PropertyInfo(Variant::VECTOR2,"zoom"),_SCS("set_zoom"),_SCS("get_zoom") );
ADD_PROPERTYI( PropertyInfo(Variant::INT,"limit/left"),_SCS("set_limit"),_SCS("get_limit"),MARGIN_LEFT);
ADD_PROPERTYI( PropertyInfo(Variant::INT,"limit/top"),_SCS("set_limit"),_SCS("get_limit"),MARGIN_TOP);
ADD_PROPERTYI( PropertyInfo(Variant::INT,"limit/right"),_SCS("set_limit"),_SCS("get_limit"),MARGIN_RIGHT);
ADD_PROPERTYI( PropertyInfo(Variant::INT,"limit/bottom"),_SCS("set_limit"),_SCS("get_limit"),MARGIN_BOTTOM);
ADD_PROPERTY( PropertyInfo(Variant::BOOL,"drag_margin/h_enabled"),_SCS("set_h_drag_enabled"),_SCS("is_h_drag_enabled") );
ADD_PROPERTY( PropertyInfo(Variant::BOOL,"drag_margin/v_enabled"),_SCS("set_v_drag_enabled"),_SCS("is_v_drag_enabled") );
ADD_PROPERTY( PropertyInfo(Variant::BOOL,"smoothing/enable"),_SCS("set_enable_follow_smoothing"),_SCS("is_follow_smoothing_enabled") );
ADD_PROPERTY( PropertyInfo(Variant::REAL,"smoothing/speed"),_SCS("set_follow_smoothing"),_SCS("get_follow_smoothing") );
//compatibility
ADD_PROPERTY( PropertyInfo(Variant::REAL,"smoothing",PROPERTY_HINT_NONE,"",0),_SCS("_set_old_smoothing"),_SCS("get_follow_smoothing") );
ADD_PROPERTYI( PropertyInfo(Variant::REAL,"drag_margin/left",PROPERTY_HINT_RANGE,"0,1,0.01"),_SCS("set_drag_margin"),_SCS("get_drag_margin"),MARGIN_LEFT);
ADD_PROPERTYI( PropertyInfo(Variant::REAL,"drag_margin/top",PROPERTY_HINT_RANGE,"0,1,0.01"),_SCS("set_drag_margin"),_SCS("get_drag_margin"),MARGIN_TOP);
ADD_PROPERTYI( PropertyInfo(Variant::REAL,"drag_margin/right",PROPERTY_HINT_RANGE,"0,1,0.01"),_SCS("set_drag_margin"),_SCS("get_drag_margin"),MARGIN_RIGHT);
ADD_PROPERTYI( PropertyInfo(Variant::REAL,"drag_margin/bottom",PROPERTY_HINT_RANGE,"0,1,0.01"),_SCS("set_drag_margin"),_SCS("get_drag_margin"),MARGIN_BOTTOM);
BIND_CONSTANT( ANCHOR_MODE_DRAG_CENTER );
BIND_CONSTANT( ANCHOR_MODE_FIXED_TOP_LEFT );
}
Camera2D::Camera2D() {
anchor_mode=ANCHOR_MODE_DRAG_CENTER;
rotating=false;
current=false;
limit[MARGIN_LEFT]=-10000000;
limit[MARGIN_TOP]=-10000000;
limit[MARGIN_RIGHT]=10000000;
limit[MARGIN_BOTTOM]=10000000;
drag_margin[MARGIN_LEFT]=0.2;
drag_margin[MARGIN_TOP]=0.2;
drag_margin[MARGIN_RIGHT]=0.2;
drag_margin[MARGIN_BOTTOM]=0.2;
camera_pos=Vector2();
first=true;
smoothing_enabled=false;
smoothing=5.0;
zoom = Vector2(1, 1);
h_drag_enabled=true;
v_drag_enabled=true;
h_ofs=0;
v_ofs=0;
}
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