godot/scene/resources/rectangle_shape_2d.cpp

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/*  rectangle_shape_2d.cpp                                               */
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#include "rectangle_shape_2d.h"

#include "servers/physics_server_2d.h"
#include "servers/rendering_server.h"
void RectangleShape2D::_update_shape() {
	PhysicsServer2D::get_singleton()->shape_set_data(get_rid(), size * 0.5);
	emit_changed();
}

void RectangleShape2D::set_size(const Vector2 &p_size) {
	size = p_size;
	_update_shape();
}

Vector2 RectangleShape2D::get_size() const {
	return size;
}

void RectangleShape2D::draw(const RID &p_to_rid, const Color &p_color) {
	RenderingServer::get_singleton()->canvas_item_add_rect(p_to_rid, Rect2(-size * 0.5, size), p_color);
	if (is_collision_outline_enabled()) {
		// Draw an outlined rectangle to make individual shapes easier to distinguish.
		Vector<Vector2> stroke_points;
		stroke_points.resize(5);
		stroke_points.write[0] = -size * 0.5;
		stroke_points.write[1] = Vector2(size.x, -size.y) * 0.5;
		stroke_points.write[2] = size * 0.5;
		stroke_points.write[3] = Vector2(-size.x, size.y) * 0.5;
		stroke_points.write[4] = -size * 0.5;

		Vector<Color> stroke_colors;
		stroke_colors.resize(5);
		for (int i = 0; i < 5; i++) {
			stroke_colors.write[i] = (p_color);
		}

		RenderingServer::get_singleton()->canvas_item_add_polyline(p_to_rid, stroke_points, stroke_colors);
	}
}

Rect2 RectangleShape2D::get_rect() const {
	return Rect2(-size * 0.5, size);
}

real_t RectangleShape2D::get_enclosing_radius() const {
	return size.length() / 2;
}

void RectangleShape2D::_bind_methods() {
	ClassDB::bind_method(D_METHOD("set_size", "size"), &RectangleShape2D::set_size);
	ClassDB::bind_method(D_METHOD("get_size"), &RectangleShape2D::get_size);

	ADD_PROPERTY(PropertyInfo(Variant::VECTOR2, "size"), "set_size", "get_size");
}

RectangleShape2D::RectangleShape2D() :
		Shape2D(PhysicsServer2D::get_singleton()->rectangle_shape_create()) {
	size = Vector2(20, 20);
	_update_shape();
}