godot/scene/resources/circle_shape_2d.cpp

/*************************************************************************/
/*  circle_shape_2d.cpp                                                  */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
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#include "circle_shape_2d.h"

#include "servers/physics_2d_server.h"
#include "servers/visual_server.h"
void CircleShape2D::_update_shape() {

	Physics2DServer::get_singleton()->shape_set_data(get_rid(),radius);
	emit_changed();
}


void CircleShape2D::set_radius(real_t p_radius) {

	radius=p_radius;
	_update_shape();
}

real_t CircleShape2D::get_radius() const {

	return radius;
}


void CircleShape2D::_bind_methods() {

	ClassDB::bind_method(_MD("set_radius","radius"),&CircleShape2D::set_radius);
	ClassDB::bind_method(_MD("get_radius"),&CircleShape2D::get_radius);

	ADD_PROPERTY( PropertyInfo(Variant::REAL,"radius",PROPERTY_HINT_RANGE,"0.01,16384,0.5"),_SCS("set_radius"),_SCS("get_radius") );

}

Rect2 CircleShape2D::get_rect() const {
	Rect2 rect;
	rect.pos=-Point2(get_radius(),get_radius());
	rect.size=Point2(get_radius(),get_radius())*2.0;
	return rect;
}

void CircleShape2D::draw(const RID& p_to_rid,const Color& p_color) {

	Vector<Vector2> points;
	for(int i=0;i<24;i++) {

		points.push_back(Vector2(Math::cos(i*Math_PI*2/24.0),Math::sin(i*Math_PI*2/24.0))*get_radius());
	}

	Vector<Color> col;
	col.push_back(p_color);
	VisualServer::get_singleton()->canvas_item_add_polygon(p_to_rid,points,col);

}

CircleShape2D::CircleShape2D() : Shape2D( Physics2DServer::get_singleton()->shape_create(Physics2DServer::SHAPE_CIRCLE)) {

	radius=10;
	_update_shape();
}