/*************************************************************************/
/*  shape_2d.cpp                                                         */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md)    */
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#include "shape_2d.h"
#include "servers/physics_2d_server.h"
RID Shape2D::get_rid() const {

	return shape;
}

void Shape2D::set_custom_solver_bias(real_t p_bias) {

	custom_bias = p_bias;
	Physics2DServer::get_singleton()->shape_set_custom_solver_bias(shape, custom_bias);
}

real_t Shape2D::get_custom_solver_bias() const {

	return custom_bias;
}

bool Shape2D::collide_with_motion(const Transform2D &p_local_xform, const Vector2 &p_local_motion, const Ref<Shape2D> &p_shape, const Transform2D &p_shape_xform, const Vector2 &p_shape_motion) {

	ERR_FAIL_COND_V(p_shape.is_null(), false);
	int r;
	return Physics2DServer::get_singleton()->shape_collide(get_rid(), p_local_xform, p_local_motion, p_shape->get_rid(), p_shape_xform, p_shape_motion, NULL, 0, r);
}

bool Shape2D::collide(const Transform2D &p_local_xform, const Ref<Shape2D> &p_shape, const Transform2D &p_shape_xform) {
	ERR_FAIL_COND_V(p_shape.is_null(), false);
	int r;
	return Physics2DServer::get_singleton()->shape_collide(get_rid(), p_local_xform, Vector2(), p_shape->get_rid(), p_shape_xform, Vector2(), NULL, 0, r);
}

Variant Shape2D::collide_with_motion_and_get_contacts(const Transform2D &p_local_xform, const Vector2 &p_local_motion, const Ref<Shape2D> &p_shape, const Transform2D &p_shape_xform, const Vector2 &p_shape_motion) {

	ERR_FAIL_COND_V(p_shape.is_null(), Variant());
	const int max_contacts = 16;
	Vector2 result[max_contacts * 2];
	int contacts = 0;

	if (!Physics2DServer::get_singleton()->shape_collide(get_rid(), p_local_xform, p_local_motion, p_shape->get_rid(), p_shape_xform, p_shape_motion, result, max_contacts, contacts))
		return Variant();

	Array results;
	results.resize(contacts * 2);
	for (int i = 0; i < contacts; i++) {
		results[i] = result[i];
	}

	return results;
}
Variant Shape2D::collide_and_get_contacts(const Transform2D &p_local_xform, const Ref<Shape2D> &p_shape, const Transform2D &p_shape_xform) {

	ERR_FAIL_COND_V(p_shape.is_null(), Variant());
	const int max_contacts = 16;
	Vector2 result[max_contacts * 2];
	int contacts = 0;

	if (!Physics2DServer::get_singleton()->shape_collide(get_rid(), p_local_xform, Vector2(), p_shape->get_rid(), p_shape_xform, Vector2(), result, max_contacts, contacts))
		return Variant();

	Array results;
	results.resize(contacts * 2);
	for (int i = 0; i < contacts; i++) {
		results[i] = result[i];
	}

	return results;
}

void Shape2D::_bind_methods() {

	ClassDB::bind_method(D_METHOD("set_custom_solver_bias", "bias"), &Shape2D::set_custom_solver_bias);
	ClassDB::bind_method(D_METHOD("get_custom_solver_bias"), &Shape2D::get_custom_solver_bias);
	ClassDB::bind_method(D_METHOD("collide", "local_xform", "with_shape", "shape_xform"), &Shape2D::collide);
	ClassDB::bind_method(D_METHOD("collide_with_motion", "local_xform", "local_motion", "with_shape", "shape_xform", "shape_motion"), &Shape2D::collide_with_motion);
	ClassDB::bind_method(D_METHOD("collide_and_get_contacts", "local_xform", "with_shape", "shape_xform"), &Shape2D::collide_and_get_contacts);
	ClassDB::bind_method(D_METHOD("collide_with_motion_and_get_contacts", "local_xform", "local_motion", "with_shape", "shape_xform", "shape_motion"), &Shape2D::collide_with_motion_and_get_contacts);

	ADD_PROPERTY(PropertyInfo(Variant::REAL, "custom_solver_bias", PROPERTY_HINT_RANGE, "0,1,0.001"), "set_custom_solver_bias", "get_custom_solver_bias");
}

Shape2D::Shape2D(const RID &p_rid) {
	shape = p_rid;
	custom_bias = 0;
}

Shape2D::~Shape2D() {

	Physics2DServer::get_singleton()->free(shape);
}