/*************************************************************************/
/*  multimesh.cpp                                                        */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2014 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 "multimesh.h"
#include "servers/visual_server.h"



void MultiMesh::_set_transform_array(const DVector<Vector3>& p_array) {

	int instance_count = get_instance_count();

	DVector<Vector3> xforms = p_array;
	int len=xforms.size();
	ERR_FAIL_COND((len/4) != instance_count);
	if (len==0)
		return;

	DVector<Vector3>::Read r = xforms.read();

	for(int i=0;i<len/4;i++) {

		Transform t;
		t.basis[0]=r[i*4+0];
		t.basis[1]=r[i*4+1];
		t.basis[2]=r[i*4+2];
		t.origin=r[i*4+3];

		set_instance_transform(i,t);
	}

}

DVector<Vector3> MultiMesh::_get_transform_array() const {

	int instance_count = get_instance_count();

	if (instance_count==0)
		return DVector<Vector3>();

	DVector<Vector3> xforms;
	xforms.resize(instance_count*4);

	DVector<Vector3>::Write w = xforms.write();

	for(int i=0;i<instance_count;i++) {

		Transform t=get_instance_transform(i);
		w[i*4+0]=t.basis[0];
		w[i*4+1]=t.basis[1];
		w[i*4+2]=t.basis[2];
		w[i*4+3]=t.origin;
	}

	return xforms;

}


void MultiMesh::_set_color_array(const DVector<Color>& p_array) {

	int instance_count = get_instance_count();

	DVector<Color> colors = p_array;
	int len=colors.size();
	ERR_FAIL_COND(len != instance_count);
	if (len==0)
		return;

	DVector<Color>::Read r = colors.read();

	for(int i=0;i<len;i++) {

		set_instance_color(i,r[i]);
	}

}

DVector<Color> MultiMesh::_get_color_array() const {

	int instance_count = get_instance_count();

	if (instance_count==0)
		return DVector<Color>();

	DVector<Color> colors;
	colors.resize(instance_count);

	for(int i=0;i<instance_count;i++) {

		colors.set(i,get_instance_color(i));
	}

	return colors;

}




void MultiMesh::set_mesh(const Ref<Mesh>& p_mesh) {

	mesh=p_mesh;
	if (!mesh.is_null())
		VisualServer::get_singleton()->multimesh_set_mesh(multimesh,mesh->get_rid());
	else
		VisualServer::get_singleton()->multimesh_set_mesh(multimesh,RID());

}

Ref<Mesh> MultiMesh::get_mesh() const {

	return mesh;

}

void MultiMesh::set_instance_count(int p_count) {

	VisualServer::get_singleton()->multimesh_set_instance_count(multimesh,p_count);

}
int MultiMesh::get_instance_count() const {

	return VisualServer::get_singleton()->multimesh_get_instance_count(multimesh);

}

void MultiMesh::set_instance_transform(int p_instance, const Transform& p_transform) {

	VisualServer::get_singleton()->multimesh_instance_set_transform(multimesh,p_instance,p_transform);


}
Transform MultiMesh::get_instance_transform(int p_instance) const {

	return VisualServer::get_singleton()->multimesh_instance_get_transform(multimesh,p_instance);

}

void MultiMesh::set_instance_color(int p_instance, const Color& p_color) {


	VisualServer::get_singleton()->multimesh_instance_set_color(multimesh,p_instance,p_color);

}
Color MultiMesh::get_instance_color(int p_instance) const {

	return VisualServer::get_singleton()->multimesh_instance_get_color(multimesh,p_instance);

}

void MultiMesh::set_aabb(const AABB& p_aabb) {

	aabb=p_aabb;
	VisualServer::get_singleton()->multimesh_set_aabb(multimesh,p_aabb);


}
AABB MultiMesh::get_aabb() const {

	return aabb;

}

void MultiMesh::generate_aabb() {



	ERR_EXPLAIN("Cannot generate AABB if mesh is null.");
	ERR_FAIL_COND(mesh.is_null());

	AABB base_aabb=mesh->get_aabb();

	aabb=AABB();

	int instance_count = get_instance_count();
	for(int i=0;i<instance_count;i++) {


		Transform xform = get_instance_transform(i);
		if(i==0)
			aabb=xform.xform(base_aabb);
		else
			aabb.merge_with(xform.xform(base_aabb));

	}

	set_aabb(aabb);

}

RID MultiMesh::get_rid() const {

	return multimesh;

}

void MultiMesh::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("set_mesh","mesh:Mesh"),&MultiMesh::set_mesh);
	ObjectTypeDB::bind_method(_MD("get_mesh:Mesh"),&MultiMesh::get_mesh);
	ObjectTypeDB::bind_method(_MD("set_instance_count"),&MultiMesh::set_instance_count);
	ObjectTypeDB::bind_method(_MD("get_instance_count"),&MultiMesh::get_instance_count);
	ObjectTypeDB::bind_method(_MD("set_instance_transform"),&MultiMesh::set_instance_transform);
	ObjectTypeDB::bind_method(_MD("get_instance_transform"),&MultiMesh::get_instance_transform);
	ObjectTypeDB::bind_method(_MD("set_instance_color"),&MultiMesh::set_instance_color);
	ObjectTypeDB::bind_method(_MD("get_instance_color"),&MultiMesh::get_instance_color);
	ObjectTypeDB::bind_method(_MD("set_aabb"),&MultiMesh::set_aabb);
	ObjectTypeDB::bind_method(_MD("get_aabb"),&MultiMesh::get_aabb);

	ObjectTypeDB::bind_method(_MD("generate_aabb"),&MultiMesh::generate_aabb);

	ObjectTypeDB::bind_method(_MD("_set_transform_array"),&MultiMesh::_set_transform_array);
	ObjectTypeDB::bind_method(_MD("_get_transform_array"),&MultiMesh::_get_transform_array);
	ObjectTypeDB::bind_method(_MD("_set_color_array"),&MultiMesh::_set_color_array);
	ObjectTypeDB::bind_method(_MD("_get_color_array"),&MultiMesh::_get_color_array);


	ADD_PROPERTY(PropertyInfo(Variant::INT,"instance_count",PROPERTY_HINT_RANGE,"0,16384,1"), _SCS("set_instance_count"), _SCS("get_instance_count"));
	ADD_PROPERTY(PropertyInfo(Variant::OBJECT,"mesh",PROPERTY_HINT_RESOURCE_TYPE,"Mesh"), _SCS("set_mesh"), _SCS("get_mesh"));
	ADD_PROPERTY(PropertyInfo(Variant::_AABB,"aabb"), _SCS("set_aabb"), _SCS("get_aabb") );
	ADD_PROPERTY(PropertyInfo(Variant::VECTOR3_ARRAY,"transform_array",PROPERTY_HINT_NONE,"",PROPERTY_USAGE_NOEDITOR), _SCS("_set_transform_array"), _SCS("_get_transform_array"));
	ADD_PROPERTY(PropertyInfo(Variant::COLOR_ARRAY,"color_array",PROPERTY_HINT_NONE,"",PROPERTY_USAGE_NOEDITOR), _SCS("_set_color_array"), _SCS("_get_color_array"));

}

MultiMesh::MultiMesh() {

	multimesh = VisualServer::get_singleton()->multimesh_create();
}

MultiMesh::~MultiMesh() {

	VisualServer::get_singleton()->free(multimesh);
}
