/*
 * mesh.h
 * 	- wrapper for assimp http://www.assimp.org
 */

#pragma once

#include <glm/glm.hpp>

#include "animation.h"
#include "util.h"
#include "util_image.h"


struct meMeshInfo
{
	glm::mat4 model_transform;
	// NOTE: vertices, normals, and tex_coords have the same count
	uint num_vertices;
	glm::vec3* vertices;
	glm::vec3* normals;
	glm::vec3* texture_coords; // NOTE: stay aligned with other buffers
	uint num_indices;
	uint* indices;
	util_image diffuse_texture;
	node_animation* node_anim;
};

struct meMeshGroup
{
	// TODO: this should be one big allocation since the mesh doesn't change
	// 	while running
	meMeshInfo** meshes;
	uint num_meshes;
};


bool meInitAssimp();

// NOTE: meshes loaded from assimp require texture coordinates, and a diffuse
// 	texture, which can be a seperate file, or embedded in the input file
bool meLoadFromFile(meMeshGroup& mesh_group, const char* filepath);

void meFreeMeshGroup(meMeshGroup& mesh_group);

void meShutdownAssimp();