/* Definition of a mesh of unstructured triangles in the RAM and in the GPU. */

#ifndef cviewer_mesh_H
#define cviewer_mesh_H

#include <rf3.h>
#include <rf4x4.h>

#include <cviewer_opengl.h>

typedef struct mesh_vertex_t {
  rf3_t vertex;
  rf3_t normal;
} mesh_vertex_t;

typedef struct mesh_t {
  GLuint vao, vbo;
  rf4x4_t model;

  rf3_t color;

  mesh_vertex_t* vertices;
  GLsizei count;
} mesh_t;
  /* Holds the data from a mesh that exists either in the RAM as in GPU memory */

void mesh_create(mesh_t* m, mesh_vertex_t const* vertices, size_t count);
  /* Populates a mesh {m} with {count} vertices described by following the pointer {vertices} and upload to the GPU
    The {vertices} data could be safely freed after calling {mesh_create}. */

void mesh_destroy(mesh_t const* m);
  /* Destroys all resources created by {m} in the GPU and in memory. */

void mesh_bind(mesh_t const* m);
  /* Binds the mesh and the buffer to be drawn. */

void mesh_update(mesh_t const* m);
  /* Updates the vertices in ram to the GPU. */

void mesh_draw(mesh_t const* m);
  /* Draws the mesh. */

#endif