libgender/util.h

#ifndef UTIL_H
#define UTIL_H

#include <cmath>
#include <cfloat>
#include <cstdlib>
#include <vector>
#include <string>

#include "opengl.h"

#include <SDL/SDL_image.h>

using namespace std;

extern CGcontext cgc;
extern CGprogram vsh;
extern CGprogram fsh;
extern CGparameter mv, mvp, lightpos;
extern CGprofile vsh_profile, fsh_profile;

typedef long long soffs; // 32 bit
typedef unsigned long long uoffs;
#define OFFS_BITS 63
#define SOFFS_MIN (soffs)-(1LL << (OFFS_BITS - 2))
#define SOFFS_MAX (soffs)+(1LL << (OFFS_BITS - 2))
#define MAXEXTENT (1ULL << (OFFS_BITS - 1))

#define ABS(n) ((n) < 0 ? -(n) : (n))

struct sector
{
  soffs x, y, z;

  sector (soffs x, soffs y, soffs z) : x(x), y(y), z(z) { };
  sector (soffs xyz = 0) : x(xyz), y(xyz), z(xyz) { };

  void offset (int subindex, uoffs extent)
  {
    if (subindex & 1) x += extent;
    if (subindex & 2) y += extent;
    if (subindex & 4) z += extent;
  }
};

inline sector operator +(const sector &a, const sector &b)
{
  return sector (a.x + b.x, a.y + b.y, a.z + b.z);
}

inline sector operator -(const sector &a, const sector &b)
{
  return sector (a.x - b.x, a.y - b.y, a.z - b.z);
}

inline sector operator /(const sector &a, soffs b)
{
  return sector (a.x / b, a.y / b, a.z / b);
}

inline sector operator >>(const sector &a, unsigned int b)
{
  return sector (a.x >> b, a.y >> b, a.z >> b);
}

inline bool operator <=(const sector &a, const sector &b)
{
  return a.x <= b.x && a.y <= b.y && a.z <= b.z;
}

inline soffs max (const sector &a)
{
  return max (a.x, max (a.y, a.z));
}

inline sector translate (const sector &p, const sector &src, const sector &dst)
{
  return p + (dst - src);
}

inline sector abs (const sector &s)
{
  return sector (ABS (s.x), ABS (s.y), ABS (s.z));
}

struct vec2
{
  GLfloat x, y;
  vec2 () { };
  vec2 (GLfloat s) : x(s), y(s) { };
  vec2 (GLfloat x, GLfloat y) : x(x), y(y) { };
};

struct vec3
{
  GLfloat x, y, z;
  vec3 () { };
  vec3 (GLfloat s) : x(s), y(s), z(s) { };
  vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
  vec3 (const sector &s) : x(s.x), y(s.y), z(s.z) { };

  const vec3 operator -() const
  { return vec3 (-x, -y, -z); }
};

const vec3 normalize (const vec3 &v);
const vec3 cross (const vec3 &a, const vec3 &b);

inline const vec3 operator *(const vec3 &a, GLfloat s)
{
  return vec3 (a.x * s, a.y * s, a.z * s);
}

inline const vec3 operator +(const vec3 &a, const vec3 &b)
{
  return vec3 (a.x + b.x, a.y + b.y, a.z + b.z);
}

inline const vec3 operator -(const vec3 &a, const vec3 &b)
{
  return vec3 (a.x - b.x, a.y - b.y, a.z - b.z);
}

inline GLfloat dot (const vec3 &a, const vec3 &b)
{
  return a.x * b.x + a.y * b.y + a.z * b.z;
}

// squared length
inline const GLfloat length2 (const vec3 &v)
{
  return dot (v, v);
}

inline const GLfloat length (const vec3 &v)
{
  return sqrtf (length2 (v));
}

typedef vec3 point;

struct vec4
{
  GLfloat x, y, z, w;
  vec4 () { };
  vec4 (GLfloat s) : x(s), y(s), z(s), w(s) { };
  vec4 (GLfloat x, GLfloat y, GLfloat z, GLfloat w) : x(x), y(y), z(z), w(w) { };
};

// a generic plane
struct plane
{
  vec3 n;
  GLfloat d;

  plane () { };
  plane (GLfloat a, GLfloat b, GLfloat c, GLfloat d);
};

inline GLfloat distance (const plane &a, const point &p)
{
  return dot (a.n, p) + a.d;
}

struct sphere {
  point p;
  GLfloat r;

  sphere () { };
  sphere (const point &p, GLfloat r) : p(p), r(r) { };
};

inline bool overlap (const sphere &a, const sphere &b)
{
  GLfloat d = a.r + b.r;

  return length2 (a.p - b.p) <= d * d;
}

struct cone {
  point p;
  vec3 a; // axis
  GLfloat f, fs1, fc2; // angle

  cone () { };
  cone (const point &p, const vec3 &a, GLfloat f)
  : p(p), a(a), f(f)
  {
    fs1 = 1.F / sinf (f);
    fc2 = cosf (f); fc2 *= fc2;
  };
};

inline bool overlap (const cone &c, const sphere &s)
{
  vec3 d = s.p - c.p + c.a * (s.r * c.fs1);
  GLfloat dd = dot (c.a, d);
  return dd > 0.F && dd * dd >= length2 (d) * c.fc2;
}

void renormalize (sector &s, point &p);

struct colour
{
  GLubyte r, g, b, a;
  colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.)
  : r(GLubyte (r * 255.F + .5F))
  , g(GLubyte (g * 255.F + .5F))
  , b(GLubyte (b * 255.F + .5F))
  , a(GLubyte (a * 255.F + .5F))
  {
  }
};

struct tex2
{
  GLfloat s, t;
  tex2 () { };
  tex2 (GLfloat s, GLfloat t) : s(s), t(t) { };
};

struct box
{
  point a, b;

  box() { };

  void reset ()
  {
    a = point ( FLT_MAX,  FLT_MAX,  FLT_MAX);
    b = point (-FLT_MAX, -FLT_MAX, -FLT_MAX);
  }

  void add (const box &o);
  void add (const point &p);
};

struct entity;
struct geometry;
struct view;
struct octant;

extern struct timer
{
  static double now;
  static double diff;
  static double fps;

  static void frame ();
  timer ();
} timer;

/*
#define MAX_EVENT_TYPES 10
enum event_type { TIMER_EV };
struct event
{
   event_type type;
};

typedef callback1<void, event&> event_cb;

class skedjuhlar
{
   public:
// only 10 types for now
   private:
      vector <list<event_cb> > event_lists;
   
   public:
      skedjuhlar () {
         event_lists.resize (MAX_EVENT_TYPES, list<event_cb>());
      }
      
      void register_event_cb (const event_type &t, const event_cb &e) {
         event_lists[t].push_back (e);
      };
      void send_event (event &e) {
         list<event_cb> &l = event_lists[e.type];
         for (list<event_cb>::iterator it = l.begin (); it != l.end (); it++) {
            (*it)(e);
         }
      };
      void check_events () {
         while (!events.empty ()) {
            event &e = events.pop_front ();
            list<event_cb> &l = event_lists[e->name];
            for (list<event_cb>::iterator it = l.begin (); it !+ l.end (); it++) {
               (*it)(e);
            }
            delete e; // ugly slow? hai hai..... 183G
         }
      }
};

extern skedjuhlar main_scheduler;
*/

namespace gl
{
#ifdef DEBUG
  void errchk (const char *name, const char *args, const char *file, int line);
#endif

  struct vertex_v3f
  {
    point p; // vertex

    vertex_v3f () { };
    vertex_v3f (point p) : p(p) { };

    GLenum gl_format () const { return GL_V3F; }
  };

  struct vertex_t2f_n3f_v3f
  {
    tex2  t; // texture
    vec3  n; // normal
    point p; // vertex

    vertex_t2f_n3f_v3f () { }
    vertex_t2f_n3f_v3f (point p, vec3 n, tex2 t = tex2()) : p(p), n(n), t(t) { }

    GLenum gl_format () const { return GL_T2F_N3F_V3F; }
  };

  GLsizei format_stride (GLenum format);
  GLsizei format_offset_p (GLenum format);
  GLsizei format_offset_n (GLenum format);
  GLsizei format_offset_t (GLenum format);

  struct index_ushort
  {
    GLushort i;

    index_ushort () { }
    index_ushort (GLushort i) : i(i) { }

    GLenum gl_format () const { return GL_UNSIGNED_SHORT; }
  };

  struct matrix
  {
    GLfloat data[4][4];

    const GLfloat operator ()(int i, int j) const { return data[j][i]; };
    GLfloat &operator ()(int i, int j) { return data[j][i]; };

    operator GLfloat *() { return &data[0][0]; }

    void diagonal (GLfloat v);
    void clear () { diagonal (0.F); };
    void identity () { diagonal (1.F); };

    void print (); // ugly

    static const matrix translation (const vec3 &v);
    static const matrix rotation (GLfloat degrees, const vec3 &axis);

    matrix () { };
    matrix (GLfloat diag) { diagonal (diag); };
  };

  const matrix operator *(const matrix &a, const matrix &b);
  const vec3 operator *(const matrix &a, const vec3 &v);

  template<GLenum target>
  struct vertex_buffer_object_base {
    GLuint buffer;
    GLenum format;

    bool alloc ()
    {
      if (buffer)
        return false;

      glGenBuffersARB (1, &buffer);
      return true;
    }

    void bind ()
    {
      glBindBufferARB (target, buffer);
    }

    template<class data>
    void set (const data *d, GLsizei count, GLenum usage = GL_STATIC_DRAW_ARB)
    {
      alloc ();
      format = d->gl_format ();
      glBindBufferARB (target, buffer);
      glBufferDataARB (target, count * sizeof (data), d, usage);
    }

    template<class data>
    void set (const vector<data> &d, GLenum usage = GL_STATIC_DRAW_ARB)
    {
      set (&d[0], d.size (), usage);
    }

    vertex_buffer_object_base ()
    : buffer(0)
    {
    }
    
    ~vertex_buffer_object_base ()
    {
      if (buffer)
        glDeleteBuffersARB (1, &buffer);
    }

    operator GLint ()
    {
      return buffer;
    }
  };

  struct vertex_buffer_object : vertex_buffer_object_base<GL_ARRAY_BUFFER_ARB> {
    void bind ()
    {
      vertex_buffer_object_base<GL_ARRAY_BUFFER_ARB>::bind ();
      glInterleavedArrays (format, 0, 0);
    }

    void draw (GLenum mode, GLint first, GLsizei count)
    {
      bind ();
      glDrawArrays (mode, first, count);
    }
  };

  struct index_buffer_object : vertex_buffer_object_base<GL_ELEMENT_ARRAY_BUFFER_ARB> {
    void draw (GLenum mode, GLint first, GLsizei count)
    {
      bind ();
      glDrawElements (mode, count, format, (GLushort*)0 + first); // only SHORT supported :( // first //D//TODO
    }
  };

  void draw_bbox (const sector &a, const sector &b);

}

GLuint SDL_GL_LoadTexture (SDL_Surface *surface, GLfloat *texcoord);

#endif

Revision:	1.51
Committed:	Sat Oct 23 21:43:27 2004 UTC (21 years, 10 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.50:	+16 -0 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#ifndef UTIL_H
2			#define UTIL_H
3
4	root	1.7	#include <cmath>
5	root	1.27	#include <cfloat>
6	root	1.39	#include <cstdlib>
7	root	1.1	#include <vector>
8	root	1.22	#include <string>
9	root	1.1
10	root	1.37	#include "opengl.h"
11	root	1.18
12	root	1.37	#include <SDL/SDL_image.h>
13	root	1.30
14	root	1.1	using namespace std;
15	root	1.18
16			extern CGcontext cgc;
17			extern CGprogram vsh;
18			extern CGprogram fsh;
19	root	1.19	extern CGparameter mv, mvp, lightpos;
20	root	1.21	extern CGprofile vsh_profile, fsh_profile;
21	root	1.1
22	root	1.36	typedef long long soffs; // 32 bit
23			typedef unsigned long long uoffs;
24	root	1.39	#define OFFS_BITS 63
25	root	1.36	#define SOFFS_MIN (soffs)-(1LL << (OFFS_BITS - 2))
26			#define SOFFS_MAX (soffs)+(1LL << (OFFS_BITS - 2))
27			#define MAXEXTENT (1ULL << (OFFS_BITS - 1))
28	root	1.1
29	root	1.39	#define ABS(n) ((n) < 0 ? -(n) : (n))
30
31	root	1.37	struct sector
32			{
33	root	1.32	soffs x, y, z;
34
35			sector (soffs x, soffs y, soffs z) : x(x), y(y), z(z) { };
36			sector (soffs xyz = 0) : x(xyz), y(xyz), z(xyz) { };
37
38			void offset (int subindex, uoffs extent)
39			{
40			if (subindex & 1) x += extent;
41			if (subindex & 2) y += extent;
42			if (subindex & 4) z += extent;
43			}
44			};
45
46			inline sector operator +(const sector &a, const sector &b)
47			{
48			return sector (a.x + b.x, a.y + b.y, a.z + b.z);
49			}
50
51			inline sector operator -(const sector &a, const sector &b)
52			{
53			return sector (a.x - b.x, a.y - b.y, a.z - b.z);
54			}
55
56			inline sector operator /(const sector &a, soffs b)
57			{
58			return sector (a.x / b, a.y / b, a.z / b);
59			}
60
61	root	1.40	inline sector operator >>(const sector &a, unsigned int b)
62			{
63			return sector (a.x >> b, a.y >> b, a.z >> b);
64			}
65
66	root	1.32	inline bool operator <=(const sector &a, const sector &b)
67			{
68			return a.x <= b.x && a.y <= b.y && a.z <= b.z;
69			}
70
71			inline soffs max (const sector &a)
72			{
73			return max (a.x, max (a.y, a.z));
74			}
75
76			inline sector translate (const sector &p, const sector &src, const sector &dst)
77			{
78			return p + (dst - src);
79			}
80
81			inline sector abs (const sector &s)
82			{
83	root	1.39	return sector (ABS (s.x), ABS (s.y), ABS (s.z));
84	root	1.32	}
85	root	1.1
86	root	1.51	struct vec2
87			{
88			GLfloat x, y;
89			vec2 () { };
90			vec2 (GLfloat s) : x(s), y(s) { };
91			vec2 (GLfloat x, GLfloat y) : x(x), y(y) { };
92			};
93
94	root	1.37	struct vec3
95			{
96	root	1.1	GLfloat x, y, z;
97			vec3 () { };
98	root	1.32	vec3 (GLfloat s) : x(s), y(s), z(s) { };
99	root	1.1	vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
100	root	1.32	vec3 (const sector &s) : x(s.x), y(s.y), z(s.z) { };
101	root	1.1
102			const vec3 operator -() const
103			{ return vec3 (-x, -y, -z); }
104			};
105
106			const vec3 normalize (const vec3 &v);
107			const vec3 cross (const vec3 &a, const vec3 &b);
108	root	1.6
109			inline const vec3 operator *(const vec3 &a, GLfloat s)
110			{
111			return vec3 (a.x * s, a.y * s, a.z * s);
112			}
113
114	root	1.27	inline const vec3 operator +(const vec3 &a, const vec3 &b)
115			{
116			return vec3 (a.x + b.x, a.y + b.y, a.z + b.z);
117			}
118
119			inline const vec3 operator -(const vec3 &a, const vec3 &b)
120			{
121			return vec3 (a.x - b.x, a.y - b.y, a.z - b.z);
122			}
123
124	root	1.6	inline GLfloat dot (const vec3 &a, const vec3 &b)
125			{
126			return a.x * b.x + a.y * b.y + a.z * b.z;
127			}
128
129	root	1.45	// squared length
130			inline const GLfloat length2 (const vec3 &v)
131	root	1.6	{
132	root	1.45	return dot (v, v);
133			}
134
135			inline const GLfloat length (const vec3 &v)
136			{
137			return sqrtf (length2 (v));
138	root	1.6	}
139	root	1.1
140	root	1.10	typedef vec3 point;
141	root	1.51
142			struct vec4
143			{
144			GLfloat x, y, z, w;
145			vec4 () { };
146			vec4 (GLfloat s) : x(s), y(s), z(s), w(s) { };
147			vec4 (GLfloat x, GLfloat y, GLfloat z, GLfloat w) : x(x), y(y), z(z), w(w) { };
148			};
149	root	1.10
150			// a generic plane
151	root	1.37	struct plane
152			{
153	root	1.10	vec3 n;
154			GLfloat d;
155
156			plane () { };
157			plane (GLfloat a, GLfloat b, GLfloat c, GLfloat d);
158			};
159	root	1.45
160			inline GLfloat distance (const plane &a, const point &p)
161			{
162			return dot (a.n, p) + a.d;
163			}
164
165			struct sphere {
166			point p;
167			GLfloat r;
168
169			sphere () { };
170			sphere (const point &p, GLfloat r) : p(p), r(r) { };
171			};
172
173			inline bool overlap (const sphere &a, const sphere &b)
174			{
175			GLfloat d = a.r + b.r;
176
177			return length2 (a.p - b.p) <= d * d;
178			}
179
180			struct cone {
181			point p;
182			vec3 a; // axis
183	root	1.47	GLfloat f, fs1, fc2; // angle
184	root	1.45
185			cone () { };
186			cone (const point &p, const vec3 &a, GLfloat f)
187			: p(p), a(a), f(f)
188			{
189	root	1.46	fs1 = 1.F / sinf (f);
190	root	1.47	fc2 = cosf (f); fc2 *= fc2;
191	root	1.45	};
192			};
193
194			inline bool overlap (const cone &c, const sphere &s)
195			{
196	root	1.46	vec3 d = s.p - c.p + c.a * (s.r * c.fs1);
197	root	1.47	GLfloat dd = dot (c.a, d);
198			return dd > 0.F && dd * dd >= length2 (d) * c.fc2;
199	root	1.45	}
200	root	1.10
201			void renormalize (sector &s, point &p);
202
203	root	1.37	struct colour
204			{
205	root	1.40	GLubyte r, g, b, a;
206			colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.)
207			: r(GLubyte (r * 255.F + .5F))
208			, g(GLubyte (g * 255.F + .5F))
209			, b(GLubyte (b * 255.F + .5F))
210			, a(GLubyte (a * 255.F + .5F))
211			{
212			}
213	root	1.10	};
214	root	1.5
215	root	1.40	struct tex2
216	root	1.37	{
217	root	1.1	GLfloat s, t;
218	root	1.40	tex2 () { };
219			tex2 (GLfloat s, GLfloat t) : s(s), t(t) { };
220	root	1.1	};
221
222	root	1.37	struct box
223			{
224	root	1.27	point a, b;
225	root	1.8
226			box() { };
227	root	1.1
228			void reset ()
229			{
230	root	1.27	a = point ( FLT_MAX, FLT_MAX, FLT_MAX);
231			b = point (-FLT_MAX, -FLT_MAX, -FLT_MAX);
232	root	1.1	}
233
234			void add (const box &o);
235			void add (const point &p);
236			};
237	root	1.5
238	root	1.27	struct entity;
239			struct geometry;
240	root	1.20	struct view;
241	root	1.32	struct octant;
242	root	1.7
243	root	1.37	extern struct timer
244			{
245	root	1.7	static double now;
246			static double diff;
247	root	1.44	static double fps;
248	root	1.7
249			static void frame ();
250			timer ();
251			} timer;
252	root	1.11
253	root	1.13	/*
254	root	1.11	#define MAX_EVENT_TYPES 10
255			enum event_type { TIMER_EV };
256	root	1.37	struct event
257			{
258	root	1.11	event_type type;
259			};
260
261			typedef callback1<void, event&> event_cb;
262
263	root	1.37	class skedjuhlar
264			{
265	root	1.11	public:
266			// only 10 types for now
267			private:
268			vector <list<event_cb> > event_lists;
269
270			public:
271			skedjuhlar () {
272			event_lists.resize (MAX_EVENT_TYPES, list<event_cb>());
273			}
274
275			void register_event_cb (const event_type &t, const event_cb &e) {
276			event_lists[t].push_back (e);
277			};
278			void send_event (event &e) {
279			list<event_cb> &l = event_lists[e.type];
280			for (list<event_cb>::iterator it = l.begin (); it != l.end (); it++) {
281			(*it)(e);
282			}
283			};
284			void check_events () {
285			while (!events.empty ()) {
286			event &e = events.pop_front ();
287			list<event_cb> &l = event_lists[e->name];
288			for (list<event_cb>::iterator it = l.begin (); it !+ l.end (); it++) {
289			(*it)(e);
290			}
291			delete e; // ugly slow? hai hai..... 183G
292			}
293			}
294			};
295
296			extern skedjuhlar main_scheduler;
297	root	1.13	*/
298	root	1.22
299	root	1.37	namespace gl
300			{
301	root	1.41	#ifdef DEBUG
302			void errchk (const char name, const char args, const char *file, int line);
303			#endif
304
305	root	1.40	struct vertex_v3f
306			{
307			point p; // vertex
308
309			vertex_v3f () { };
310			vertex_v3f (point p) : p(p) { };
311
312			GLenum gl_format () const { return GL_V3F; }
313			};
314
315			struct vertex_t2f_n3f_v3f
316			{
317			tex2 t; // texture
318			vec3 n; // normal
319			point p; // vertex
320
321	root	1.48	vertex_t2f_n3f_v3f () { }
322			vertex_t2f_n3f_v3f (point p, vec3 n, tex2 t = tex2()) : p(p), n(n), t(t) { }
323	root	1.40
324			GLenum gl_format () const { return GL_T2F_N3F_V3F; }
325			};
326	root	1.34
327	root	1.49	GLsizei format_stride (GLenum format);
328			GLsizei format_offset_p (GLenum format);
329			GLsizei format_offset_n (GLenum format);
330			GLsizei format_offset_t (GLenum format);
331
332	root	1.48	struct index_ushort
333			{
334			GLushort i;
335
336			index_ushort () { }
337			index_ushort (GLushort i) : i(i) { }
338
339			GLenum gl_format () const { return GL_UNSIGNED_SHORT; }
340			};
341
342	root	1.41	struct matrix
343			{
344			GLfloat data[4][4];
345
346			const GLfloat operator ()(int i, int j) const { return data[j][i]; };
347			GLfloat &operator ()(int i, int j) { return data[j][i]; };
348
349			operator GLfloat *() { return &data[0][0]; }
350
351			void diagonal (GLfloat v);
352			void clear () { diagonal (0.F); };
353			void identity () { diagonal (1.F); };
354
355			void print (); // ugly
356
357			static const matrix translation (const vec3 &v);
358			static const matrix rotation (GLfloat degrees, const vec3 &axis);
359
360			matrix () { };
361			matrix (GLfloat diag) { diagonal (diag); };
362			};
363
364			const matrix operator *(const matrix &a, const matrix &b);
365			const vec3 operator *(const matrix &a, const vec3 &v);
366	root	1.40
367	root	1.48	template<GLenum target>
368			struct vertex_buffer_object_base {
369	root	1.40	GLuint buffer;
370			GLenum format;
371
372	root	1.48	bool alloc ()
373	root	1.40	{
374	root	1.48	if (buffer)
375			return false;
376
377			glGenBuffersARB (1, &buffer);
378			return true;
379	root	1.40	}
380
381	root	1.48	void bind ()
382	root	1.40	{
383			glBindBufferARB (target, buffer);
384			}
385
386	root	1.48	template<class data>
387			void set (const data *d, GLsizei count, GLenum usage = GL_STATIC_DRAW_ARB)
388	root	1.40	{
389			alloc ();
390	root	1.48	format = d->gl_format ();
391	root	1.40	glBindBufferARB (target, buffer);
392	root	1.48	glBufferDataARB (target, count * sizeof (data), d, usage);
393	root	1.40	}
394
395	root	1.48	template<class data>
396			void set (const vector<data> &d, GLenum usage = GL_STATIC_DRAW_ARB)
397	root	1.40	{
398	root	1.48	set (&d[0], d.size (), usage);
399	root	1.40	}
400
401	root	1.48	vertex_buffer_object_base ()
402	root	1.40	: buffer(0)
403			{
404			}
405
406	root	1.48	~vertex_buffer_object_base ()
407	root	1.40	{
408	root	1.48	if (buffer)
409			glDeleteBuffersARB (1, &buffer);
410	root	1.40	}
411
412			operator GLint ()
413			{
414			return buffer;
415			}
416			};
417
418	root	1.48	struct vertex_buffer_object : vertex_buffer_object_base<GL_ARRAY_BUFFER_ARB> {
419			void bind ()
420			{
421			vertex_buffer_object_base<GL_ARRAY_BUFFER_ARB>::bind ();
422			glInterleavedArrays (format, 0, 0);
423			}
424
425			void draw (GLenum mode, GLint first, GLsizei count)
426			{
427			bind ();
428			glDrawArrays (mode, first, count);
429			}
430			};
431
432			struct index_buffer_object : vertex_buffer_object_base<GL_ELEMENT_ARRAY_BUFFER_ARB> {
433			void draw (GLenum mode, GLint first, GLsizei count)
434			{
435			bind ();
436			glDrawElements (mode, count, format, (GLushort*)0 + first); // only SHORT supported :( // first //D//TODO
437			}
438			};
439
440			void draw_bbox (const sector &a, const sector &b);
441	root	1.49
442	root	1.31	}
443
444	root	1.40	GLuint SDL_GL_LoadTexture (SDL_Surface surface, GLfloat texcoord);
445	root	1.27
446	root	1.1	#endif
447