/*************************************************************************/
/*  multimesh_instance_2d.cpp                                            */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
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#include "multimesh_instance_2d.h"
#include "core/core_string_names.h"

#include "scene/resources/mesh/multimesh.h"

void MultiMeshInstance2D::_notification(int p_what) {
	if (p_what == NOTIFICATION_DRAW) {
		if (multimesh.is_valid()) {
			draw_multimesh(multimesh, texture, normal_map);
		}
	}
}

void MultiMeshInstance2D::_bind_methods() {
	ClassDB::bind_method(D_METHOD("set_multimesh", "multimesh"), &MultiMeshInstance2D::set_multimesh);
	ClassDB::bind_method(D_METHOD("get_multimesh"), &MultiMeshInstance2D::get_multimesh);

	ClassDB::bind_method(D_METHOD("set_texture", "texture"), &MultiMeshInstance2D::set_texture);
	ClassDB::bind_method(D_METHOD("get_texture"), &MultiMeshInstance2D::get_texture);

	ClassDB::bind_method(D_METHOD("set_normal_map", "normal_map"), &MultiMeshInstance2D::set_normal_map);
	ClassDB::bind_method(D_METHOD("get_normal_map"), &MultiMeshInstance2D::get_normal_map);

	ADD_SIGNAL(MethodInfo("texture_changed"));

	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "multimesh", PROPERTY_HINT_RESOURCE_TYPE, "MultiMesh"), "set_multimesh", "get_multimesh");
	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "texture", PROPERTY_HINT_RESOURCE_TYPE, "Texture"), "set_texture", "get_texture");
	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "normal_map", PROPERTY_HINT_RESOURCE_TYPE, "Texture"), "set_normal_map", "get_normal_map");
}

void MultiMeshInstance2D::set_multimesh(const Ref<MultiMesh> &p_multimesh) {
	// Cleanup previous connection if any.
	if (multimesh.is_valid()) {
		multimesh->disconnect(CoreStringNames::get_singleton()->changed, this, "update");
	}
	multimesh = p_multimesh;

	// Connect to the multimesh so the AABB can update when instance transforms are changed.
	if (multimesh.is_valid()) {
		multimesh->connect(CoreStringNames::get_singleton()->changed, this, "update");
	}
	update();
}

Ref<MultiMesh> MultiMeshInstance2D::get_multimesh() const {
	return multimesh;
}

void MultiMeshInstance2D::set_texture(const Ref<Texture> &p_texture) {
	if (p_texture == texture) {
		return;
	}
	texture = p_texture;
	update();
	emit_signal("texture_changed");
	_change_notify("texture");
}

Ref<Texture> MultiMeshInstance2D::get_texture() const {
	return texture;
}

void MultiMeshInstance2D::set_normal_map(const Ref<Texture> &p_texture) {
	normal_map = p_texture;
	update();
}

Ref<Texture> MultiMeshInstance2D::get_normal_map() const {
	return normal_map;
}

MultiMeshInstance2D::MultiMeshInstance2D() {
}

MultiMeshInstance2D::~MultiMeshInstance2D() {
}
