text: /*************************************************************************/
  /*  multimesh.cpp                                                        */
  /*************************************************************************/
  /*                       This file is part of:                           */
  /*                           GODOT ENGINE                                */
  /*                      https://godotengine.org                          */
  /*************************************************************************/
  /* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur.                 */
  /* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md)    */
  /*                                                                       */
  /* 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 PoolVector<Vector3> &p_array) {
  
  	PoolVector<Vector3> xforms = p_array;
  	int len = xforms.size();
  	ERR_FAIL_COND((len / 4) != instance_count);
  	if (len == 0)
  		return;
  
  	PoolVector<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);
  	}
  }
  
  PoolVector<Vector3> MultiMesh::_get_transform_array() const {
  
  	if (instance_count == 0)
  		return PoolVector<Vector3>();
  
  	PoolVector<Vector3> xforms;
  	xforms.resize(instance_count * 4);
  
  	PoolVector<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 PoolVector<Color> &p_array) {
  
  	PoolVector<Color> colors = p_array;
  	int len = colors.size();
  	if (len == 0)
  		return;
  	ERR_FAIL_COND(len != instance_count);
  
  	PoolVector<Color>::Read r = colors.read();
  
  	for (int i = 0; i < len; i++) {
  
  		set_instance_color(i, r[i]);
  	}
  }
  
  PoolVector<Color> MultiMesh::_get_color_array() const {
  
  	if (instance_count == 0 || color_format == COLOR_NONE)
  		return PoolVector<Color>();
  
  	PoolVector<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_custom_data_array(const PoolVector<Color> &p_array) {
  
  	PoolVector<Color> custom_datas = p_array;
  	int len = custom_datas.size();
  	if (len == 0)
  		return;
  	ERR_FAIL_COND(len != instance_count);
  
  	PoolVector<Color>::Read r = custom_datas.read();
  
  	for (int i = 0; i < len; i++) {
  
  		set_instance_custom_data(i, r[i]);
  	}
  }
  
  PoolVector<Color> MultiMesh::_get_custom_data_array() const {
  
  	if (instance_count == 0 || custom_data_format == CUSTOM_DATA_NONE)
  		return PoolVector<Color>();
  
  	PoolVector<Color> custom_datas;
  	custom_datas.resize(instance_count);
  
  	for (int i = 0; i < instance_count; i++) {
  
  		custom_datas.set(i, get_instance_custom_data(i));
  	}
  
  	return custom_datas;
  }
  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) {
  	ERR_FAIL_COND(p_count < 0);
  	VisualServer::get_singleton()->multimesh_allocate(multimesh, p_count, VS::MultimeshTransformFormat(transform_format), VS::MultimeshColorFormat(color_format), VS::MultimeshCustomDataFormat(custom_data_format));
  	instance_count = p_count;
  }
  int MultiMesh::get_instance_count() const {
  
  	return instance_count;
  }
  
  void MultiMesh::set_visible_instance_count(int p_count) {
  	ERR_FAIL_COND(p_count < -1);
  	VisualServer::get_singleton()->multimesh_set_visible_instances(multimesh, p_count);
  	visible_instance_count = p_count;
  }
  int MultiMesh::get_visible_instance_count() const {
  
  	return visible_instance_count;
  }
  
  void MultiMesh::set_instance_transform(int p_instance, const Transform &p_transform) {
  
  	VisualServer::get_singleton()->multimesh_instance_set_transform(multimesh, p_instance, p_transform);
  }
  
  void MultiMesh::set_instance_transform_2d(int p_instance, const Transform2D &p_transform) {
  
  	VisualServer::get_singleton()->multimesh_instance_set_transform_2d(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);
  }
  
  Transform2D MultiMesh::get_instance_transform_2d(int p_instance) const {
  
  	return VisualServer::get_singleton()->multimesh_instance_get_transform_2d(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_instance_custom_data(int p_instance, const Color &p_custom_data) {
  
  	VisualServer::get_singleton()->multimesh_instance_set_custom_data(multimesh, p_instance, p_custom_data);
  }
  Color MultiMesh::get_instance_custom_data(int p_instance) const {
  
  	return VisualServer::get_singleton()->multimesh_instance_get_custom_data(multimesh, p_instance);
  }
  
  AABB MultiMesh::get_aabb() const {
  
  	return VisualServer::get_singleton()->multimesh_get_aabb(multimesh);
  }
  
  RID MultiMesh::get_rid() const {
  
  	return multimesh;
  }
  
  void MultiMesh::set_color_format(ColorFormat p_color_format) {
  
  	ERR_FAIL_COND(instance_count > 0);
  	color_format = p_color_format;
  }
  
  MultiMesh::ColorFormat MultiMesh::get_color_format() const {
  
  	return color_format;
  }
  
  void MultiMesh::set_custom_data_format(CustomDataFormat p_custom_data_format) {
  
  	ERR_FAIL_COND(instance_count > 0);
  	custom_data_format = p_custom_data_format;
  }
  
  MultiMesh::CustomDataFormat MultiMesh::get_custom_data_format() const {
  
  	return custom_data_format;
  }
  
  void MultiMesh::set_transform_format(TransformFormat p_transform_format) {
  
  	ERR_FAIL_COND(instance_count > 0);
  	transform_format = p_transform_format;
  }
  MultiMesh::TransformFormat MultiMesh::get_transform_format() const {
  
  	return transform_format;
  }
  
  void MultiMesh::_bind_methods() {
  
  	ClassDB::bind_method(D_METHOD("set_mesh", "mesh"), &MultiMesh::set_mesh);
  	ClassDB::bind_method(D_METHOD("get_mesh"), &MultiMesh::get_mesh);
  	ClassDB::bind_method(D_METHOD("set_color_format", "format"), &MultiMesh::set_color_format);
  	ClassDB::bind_method(D_METHOD("get_color_format"), &MultiMesh::get_color_format);
  	ClassDB::bind_method(D_METHOD("set_custom_data_format", "format"), &MultiMesh::set_custom_data_format);
  	ClassDB::bind_method(D_METHOD("get_custom_data_format"), &MultiMesh::get_custom_data_format);
  	ClassDB::bind_method(D_METHOD("set_transform_format", "format"), &MultiMesh::set_transform_format);
  	ClassDB::bind_method(D_METHOD("get_transform_format"), &MultiMesh::get_transform_format);
  
  	ClassDB::bind_method(D_METHOD("set_instance_count", "count"), &MultiMesh::set_instance_count);
  	ClassDB::bind_method(D_METHOD("get_instance_count"), &MultiMesh::get_instance_count);
  	ClassDB::bind_method(D_METHOD("set_visible_instance_count", "count"), &MultiMesh::set_visible_instance_count);
  	ClassDB::bind_method(D_METHOD("get_visible_instance_count"), &MultiMesh::get_visible_instance_count);
  	ClassDB::bind_method(D_METHOD("set_instance_transform", "instance", "transform"), &MultiMesh::set_instance_transform);
  	ClassDB::bind_method(D_METHOD("set_instance_transform_2d", "instance", "transform"), &MultiMesh::set_instance_transform_2d);
  	ClassDB::bind_method(D_METHOD("get_instance_transform", "instance"), &MultiMesh::get_instance_transform);
  	ClassDB::bind_method(D_METHOD("get_instance_transform_2d", "instance"), &MultiMesh::get_instance_transform_2d);
  	ClassDB::bind_method(D_METHOD("set_instance_color", "instance", "color"), &MultiMesh::set_instance_color);
  	ClassDB::bind_method(D_METHOD("get_instance_color", "instance"), &MultiMesh::get_instance_color);
  	ClassDB::bind_method(D_METHOD("set_instance_custom_data", "instance", "custom_data"), &MultiMesh::set_instance_custom_data);
  	ClassDB::bind_method(D_METHOD("get_instance_custom_data", "instance"), &MultiMesh::get_instance_custom_data);
  	ClassDB::bind_method(D_METHOD("get_aabb"), &MultiMesh::get_aabb);
  
  	ClassDB::bind_method(D_METHOD("_set_transform_array"), &MultiMesh::_set_transform_array);
  	ClassDB::bind_method(D_METHOD("_get_transform_array"), &MultiMesh::_get_transform_array);
  	ClassDB::bind_method(D_METHOD("_set_color_array"), &MultiMesh::_set_color_array);
  	ClassDB::bind_method(D_METHOD("_get_color_array"), &MultiMesh::_get_color_array);
  	ClassDB::bind_method(D_METHOD("_set_custom_data_array"), &MultiMesh::_set_custom_data_array);
  	ClassDB::bind_method(D_METHOD("_get_custom_data_array"), &MultiMesh::_get_custom_data_array);
  
  	ADD_PROPERTY(PropertyInfo(Variant::INT, "color_format", PROPERTY_HINT_ENUM, "None,Byte,Float"), "set_color_format", "get_color_format");
  	ADD_PROPERTY(PropertyInfo(Variant::INT, "transform_format", PROPERTY_HINT_ENUM, "2D,3D"), "set_transform_format", "get_transform_format");
  	ADD_PROPERTY(PropertyInfo(Variant::INT, "custom_data_format", PROPERTY_HINT_ENUM, "None,Byte,Float"), "set_custom_data_format", "get_custom_data_format");
  	ADD_PROPERTY(PropertyInfo(Variant::INT, "instance_count", PROPERTY_HINT_RANGE, "0,16384,1,or_greater"), "set_instance_count", "get_instance_count");
  	ADD_PROPERTY(PropertyInfo(Variant::INT, "visible_instance_count", PROPERTY_HINT_RANGE, "-1,16384,1,or_greater"), "set_visible_instance_count", "get_visible_instance_count");
  	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "mesh", PROPERTY_HINT_RESOURCE_TYPE, "Mesh"), "set_mesh", "get_mesh");
  	ADD_PROPERTY(PropertyInfo(Variant::POOL_VECTOR3_ARRAY, "transform_array", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR | PROPERTY_USAGE_INTERNAL), "_set_transform_array", "_get_transform_array");
  	ADD_PROPERTY(PropertyInfo(Variant::POOL_COLOR_ARRAY, "color_array", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR | PROPERTY_USAGE_INTERNAL), "_set_color_array", "_get_color_array");
  	ADD_PROPERTY(PropertyInfo(Variant::POOL_COLOR_ARRAY, "custom_data_array", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR | PROPERTY_USAGE_INTERNAL), "_set_custom_data_array", "_get_custom_data_array");
  
  	BIND_ENUM_CONSTANT(TRANSFORM_2D);
  	BIND_ENUM_CONSTANT(TRANSFORM_3D);
  
  	BIND_ENUM_CONSTANT(COLOR_NONE);
  	BIND_ENUM_CONSTANT(COLOR_8BIT);
  	BIND_ENUM_CONSTANT(COLOR_FLOAT);
  
  	BIND_ENUM_CONSTANT(CUSTOM_DATA_NONE);
  	BIND_ENUM_CONSTANT(CUSTOM_DATA_8BIT);
  	BIND_ENUM_CONSTANT(CUSTOM_DATA_FLOAT);
  }
  
  MultiMesh::MultiMesh() {
  
  	multimesh = VisualServer::get_singleton()->multimesh_create();
  	color_format = COLOR_NONE;
  	custom_data_format = CUSTOM_DATA_NONE;
  	transform_format = TRANSFORM_2D;
  	visible_instance_count = -1;
  	instance_count = 0;
  }
  
  MultiMesh::~MultiMesh() {
  
  	VisualServer::get_singleton()->free(multimesh);
  }
  