#include "main.h"
#include <GL/glew.h>
#include <stdlib.h>

struct obj 
{
	unsigned int vertex, vao, vbo;
};

mesh_t create_mesh( float * mesh )
{
	struct obj * p;

	p=malloc(sizeof(struct obj));

	p->vertex=(*mesh)/3;

	glGenVertexArrays( 1, &p->vao );
	glGenBuffers( 1, &p->vbo );

	glBindVertexArray( p->vao );
	glBindBuffer( GL_ARRAY_BUFFER, p->vbo );
	glBufferData( GL_ARRAY_BUFFER, (p->vertex*3)*sizeof(float), mesh+1, 
		GL_STATIC_DRAW );

	glVertexAttribPointer( 0,3,GL_FLOAT, 0, 3*sizeof(float), NULL );
	glEnableVertexAttribArray(0);

	return p;
}

void destroy_mesh( mesh_t p )
{
	struct obj * obj ;
	obj = p;
	glDeleteVertexArrays( 1, &obj->vao );
	glDeleteBuffers( 1, &obj->vbo );
	free( p );
}

void draw_mesh( mesh_t p )
{
	struct obj * obj=p;

	glBindVertexArray( obj->vao );
#ifdef DEBUG
	{
		int i;
		for( i=0; i<obj->vertex;i+=3 )
			glDrawArrays(GL_LINE_LOOP, i, 3 );
	}
#else
	glDrawArrays(GL_TRIANGLES, 0, obj->vertex );
#endif
}