/* Simple Scene Graph ------------------------------------------------------- */

#ifndef __SSG_H__
#define __SSG_H__

#ifdef __APPLE__
#include <GL/glew.h>                                                                                                                                                      
#include <GLUT/glut.h>
#else
#include <GL/glew.h>
#include <GL/glut.h>
#endif

#include <stdlib.h>

enum {
    SSG_NODE_RENDER,
    SSG_NODE_SHADER,
};

typedef struct SSG_Node	    SSG_Node;
typedef struct SSG_Viewer   SSG_Viewer;
typedef struct SSG_Shader   SSG_Shader;

typedef	void render_func_t(SSG_Node *n);

SSG_Node *  ssg_node_create(render_func_t *render, int type, void *data);
void	    ssg_node_delete(SSG_Node *n);
void *	    ssg_node_data(SSG_Node *n);
void	    ssg_node_connect(SSG_Node *parent, SSG_Node *child);
void	    ssg_node_render(SSG_Node *n);

SSG_Viewer *ssg_viewer_create(const char *title, size_t width, size_t height);
void	    ssg_viewer_initialize(SSG_Viewer *v, int *argc, char *argv[]);
void	    ssg_viewer_show(SSG_Viewer *v, SSG_Node *n);

void	    ssg_cube_render(SSG_Node *n);
#define	    ssg_cube_create()   ssg_node_create(ssg_cube_render, SSG_NODE_RENDER, NULL)
void	    ssg_teapot_render(SSG_Node *n);
#define	    ssg_teapot_create() ssg_node_create(ssg_teapot_render, SSG_NODE_RENDER, NULL)

SSG_Shader *ssg_shader_create(const char *vert_src_path, const char *frag_src_path);
GLuint	    ssg_shader_program(SSG_Shader *s);

#endif

/* vim: set sts=4 sw=4 ts=8 ft=cpp: ----------------------------------------- */