cvsroot/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;

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) { };
  vec4 (const vec3 &v, GLfloat w = 1.F) : x(v.x), y(v.y), z(v.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) { };
};

template<typename vectype> class vector_traits { };

template<>
struct vector_traits<vec2>
{
  typedef GLfloat basetype;
  static const int dimension () { return 2; }
};

template<>
struct vector_traits<vec3>
{
  typedef GLfloat basetype;
  static const int dimension () { return 3; }
};

template<>
struct vector_traits<vec4>
{
  typedef GLfloat basetype;
  static const int dimension () { return 4; }
};

template<>
struct vector_traits<tex2>
{
  typedef GLfloat basetype;
  static const int dimension () { return 2; }
};

template<>
struct vector_traits<colour>
{
  typedef GLubyte basetype;
  static const int dimension () { return 4; }
};

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 v; // vertex

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

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

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

  template<typename unused> class type_traits { };

  template<> struct type_traits<GLfloat > { static const GLenum glenum () { return GL_FLOAT; } };
  template<> struct type_traits<GLdouble> { static const GLenum glenum () { return GL_DOUBLE; } };
  template<> struct type_traits<GLint   > { static const GLenum glenum () { return GL_INT; } };
  template<> struct type_traits<GLuint  > { static const GLenum glenum () { return GL_UNSIGNED_INT; } };
  template<> struct type_traits<GLshort > { static const GLenum glenum () { return GL_SHORT; } };
  template<> struct type_traits<GLushort> { static const GLenum glenum () { return GL_UNSIGNED_SHORT; } };
  template<> struct type_traits<GLbyte  > { static const GLenum glenum () { return GL_BYTE; } };
  template<> struct type_traits<GLubyte > { static const GLenum glenum () { return GL_UNSIGNED_BYTE; } };
  template<> struct type_traits<vertex_v3f        > { static const GLenum glenum () { return GL_V3F; } };
  template<> struct type_traits<vertex_t2f_n3f_v3f> { static const GLenum glenum () { return GL_T2F_N3F_V3F; } };

  template<GLenum unused> class enum_traits { };

  template<> struct enum_traits<GL_FLOAT         > { typedef GLfloat type; };
  template<> struct enum_traits<GL_DOUBLE        > { typedef GLdouble type; };
  template<> struct enum_traits<GL_INT           > { typedef GLint type; };
  template<> struct enum_traits<GL_UNSIGNED_INT  > { typedef GLuint type; };
  template<> struct enum_traits<GL_SHORT         > { typedef GLshort type; };
  template<> struct enum_traits<GL_UNSIGNED_SHORT> { typedef GLushort type; };
  template<> struct enum_traits<GL_BYTE          > { typedef GLbyte type; };
  template<> struct enum_traits<GL_UNSIGNED_BYTE > { typedef GLubyte type; };
  template<> struct enum_traits<GL_V3F           > { typedef vertex_v3f type; };
  template<> struct enum_traits<GL_T2F_N3F_V3F   > { typedef vertex_t2f_n3f_v3f type; };

  // deprecated:
  GLsizei format_stride (GLenum format);
  GLsizei format_offset_p (GLenum format);
  GLsizei format_offset_n (GLenum format);
  GLsizei format_offset_t (GLenum format);

  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 matrix translation (const vec3 &v);
    static matrix rotation (GLfloat degrees, const vec3 &axis);
    static matrix scaling (GLfloat sx, GLfloat sy, GLfloat sz, GLfloat w = 1.F);

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

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

  template<GLenum target>
  struct vertex_buffer_object
  {
    GLuint buffer;
    GLenum format;
    GLsizei count;
    GLsizei size;

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

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

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

    template<class basetype>
    void set (const basetype *d, GLsizei count, GLenum usage = GL_STATIC_DRAW_ARB)
    {
      alloc ();
      format = type_traits<basetype>::glenum ();
      this->count = count;
      size = sizeof (basetype);
      vertex_buffer_object::bind ();
      glBufferDataARB (target, count * this->size, d, usage);
    }

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

    template<typename basetype>
    void set (GLsizei count, GLenum usage = GL_DYNAMIC_DRAW_ARB)
    {
      alloc ();
      format = type_traits<basetype>::glenum ();
      this->count = count;
      size = sizeof (basetype);
      vertex_buffer_object::bind ();
      glBufferDataARB (target, this->count * size, 0, usage);
    }

    void *map (GLenum access = GL_WRITE_ONLY)
    {
      vertex_buffer_object::bind ();
      return glMapBufferARB (target, access);
    }

    void unmap ()
    {
      vertex_buffer_object::bind ();
      glUnmapBuffer (target);
    }

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

    operator GLint ()
    {
      return buffer;
    }
  };

  struct vertex_buffer : vertex_buffer_object<GL_ARRAY_BUFFER_ARB>
  {
    void bind ()
    {
      vertex_buffer_object<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 : vertex_buffer_object<GL_ELEMENT_ARRAY_BUFFER_ARB>
  {
    void draw (GLenum mode, GLint first, GLsizei count)
    {
      bind ();
      glDrawElements (mode, count, format, (GLvoid *)((char *)0 + first * size)); // 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:	1.56
Committed:	Sat Oct 30 15:59:20 2004 UTC (21 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.55:	+51 -43 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	root	1.36	typedef long long soffs; // 32 bit
17			typedef unsigned long long uoffs;
18	root	1.39	#define OFFS_BITS 63
19	root	1.36	#define SOFFS_MIN (soffs)-(1LL << (OFFS_BITS - 2))
20			#define SOFFS_MAX (soffs)+(1LL << (OFFS_BITS - 2))
21			#define MAXEXTENT (1ULL << (OFFS_BITS - 1))
22	root	1.1
23	root	1.39	#define ABS(n) ((n) < 0 ? -(n) : (n))
24
25	root	1.37	struct sector
26			{
27	root	1.32	soffs x, y, z;
28
29			sector (soffs x, soffs y, soffs z) : x(x), y(y), z(z) { };
30			sector (soffs xyz = 0) : x(xyz), y(xyz), z(xyz) { };
31
32			void offset (int subindex, uoffs extent)
33			{
34			if (subindex & 1) x += extent;
35			if (subindex & 2) y += extent;
36			if (subindex & 4) z += extent;
37			}
38			};
39
40			inline sector operator +(const sector &a, const sector &b)
41			{
42			return sector (a.x + b.x, a.y + b.y, a.z + b.z);
43			}
44
45			inline sector operator -(const sector &a, const sector &b)
46			{
47			return sector (a.x - b.x, a.y - b.y, a.z - b.z);
48			}
49
50			inline sector operator /(const sector &a, soffs b)
51			{
52			return sector (a.x / b, a.y / b, a.z / b);
53			}
54
55	root	1.40	inline sector operator >>(const sector &a, unsigned int b)
56			{
57			return sector (a.x >> b, a.y >> b, a.z >> b);
58			}
59
60	root	1.32	inline bool operator <=(const sector &a, const sector &b)
61			{
62			return a.x <= b.x && a.y <= b.y && a.z <= b.z;
63			}
64
65			inline soffs max (const sector &a)
66			{
67			return max (a.x, max (a.y, a.z));
68			}
69
70			inline sector translate (const sector &p, const sector &src, const sector &dst)
71			{
72			return p + (dst - src);
73			}
74
75			inline sector abs (const sector &s)
76			{
77	root	1.39	return sector (ABS (s.x), ABS (s.y), ABS (s.z));
78	root	1.32	}
79	root	1.1
80	root	1.51	struct vec2
81			{
82			GLfloat x, y;
83			vec2 () { };
84			vec2 (GLfloat s) : x(s), y(s) { };
85			vec2 (GLfloat x, GLfloat y) : x(x), y(y) { };
86			};
87
88	root	1.37	struct vec3
89			{
90	root	1.1	GLfloat x, y, z;
91			vec3 () { };
92	root	1.32	vec3 (GLfloat s) : x(s), y(s), z(s) { };
93	root	1.1	vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
94	root	1.32	vec3 (const sector &s) : x(s.x), y(s.y), z(s.z) { };
95	root	1.1
96			const vec3 operator -() const
97			{ return vec3 (-x, -y, -z); }
98			};
99
100			const vec3 normalize (const vec3 &v);
101			const vec3 cross (const vec3 &a, const vec3 &b);
102	root	1.6
103			inline const vec3 operator *(const vec3 &a, GLfloat s)
104			{
105			return vec3 (a.x * s, a.y * s, a.z * s);
106			}
107
108	root	1.27	inline const vec3 operator +(const vec3 &a, const vec3 &b)
109			{
110			return vec3 (a.x + b.x, a.y + b.y, a.z + b.z);
111			}
112
113			inline const vec3 operator -(const vec3 &a, const vec3 &b)
114			{
115			return vec3 (a.x - b.x, a.y - b.y, a.z - b.z);
116			}
117
118	root	1.6	inline GLfloat dot (const vec3 &a, const vec3 &b)
119			{
120			return a.x * b.x + a.y * b.y + a.z * b.z;
121			}
122
123	root	1.45	// squared length
124			inline const GLfloat length2 (const vec3 &v)
125	root	1.6	{
126	root	1.45	return dot (v, v);
127			}
128
129			inline const GLfloat length (const vec3 &v)
130			{
131			return sqrtf (length2 (v));
132	root	1.6	}
133	root	1.1
134	root	1.10	typedef vec3 point;
135	root	1.51
136			struct vec4
137			{
138			GLfloat x, y, z, w;
139			vec4 () { };
140			vec4 (GLfloat s) : x(s), y(s), z(s), w(s) { };
141			vec4 (GLfloat x, GLfloat y, GLfloat z, GLfloat w) : x(x), y(y), z(z), w(w) { };
142	root	1.53	vec4 (const vec3 &v, GLfloat w = 1.F) : x(v.x), y(v.y), z(v.z), w(w) { };
143	root	1.51	};
144	root	1.10
145			// a generic plane
146	root	1.37	struct plane
147			{
148	root	1.10	vec3 n;
149			GLfloat d;
150
151			plane () { };
152			plane (GLfloat a, GLfloat b, GLfloat c, GLfloat d);
153			};
154	root	1.45
155			inline GLfloat distance (const plane &a, const point &p)
156			{
157			return dot (a.n, p) + a.d;
158			}
159
160			struct sphere {
161			point p;
162			GLfloat r;
163
164			sphere () { };
165			sphere (const point &p, GLfloat r) : p(p), r(r) { };
166			};
167
168			inline bool overlap (const sphere &a, const sphere &b)
169			{
170			GLfloat d = a.r + b.r;
171
172			return length2 (a.p - b.p) <= d * d;
173			}
174
175			struct cone {
176			point p;
177			vec3 a; // axis
178	root	1.47	GLfloat f, fs1, fc2; // angle
179	root	1.45
180			cone () { };
181			cone (const point &p, const vec3 &a, GLfloat f)
182			: p(p), a(a), f(f)
183			{
184	root	1.46	fs1 = 1.F / sinf (f);
185	root	1.47	fc2 = cosf (f); fc2 *= fc2;
186	root	1.45	};
187			};
188
189			inline bool overlap (const cone &c, const sphere &s)
190			{
191	root	1.46	vec3 d = s.p - c.p + c.a * (s.r * c.fs1);
192	root	1.47	GLfloat dd = dot (c.a, d);
193			return dd > 0.F && dd * dd >= length2 (d) * c.fc2;
194	root	1.45	}
195	root	1.10
196			void renormalize (sector &s, point &p);
197
198	root	1.37	struct colour
199			{
200	root	1.40	GLubyte r, g, b, a;
201			colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.)
202			: r(GLubyte (r * 255.F + .5F))
203			, g(GLubyte (g * 255.F + .5F))
204			, b(GLubyte (b * 255.F + .5F))
205			, a(GLubyte (a * 255.F + .5F))
206			{
207			}
208	root	1.10	};
209	root	1.5
210	root	1.40	struct tex2
211	root	1.37	{
212	root	1.1	GLfloat s, t;
213	root	1.40	tex2 () { };
214			tex2 (GLfloat s, GLfloat t) : s(s), t(t) { };
215	root	1.1	};
216
217	root	1.52	template<typename vectype> class vector_traits { };
218
219			template<>
220			struct vector_traits<vec2>
221			{
222			typedef GLfloat basetype;
223			static const int dimension () { return 2; }
224			};
225
226			template<>
227			struct vector_traits<vec3>
228			{
229			typedef GLfloat basetype;
230			static const int dimension () { return 3; }
231			};
232
233			template<>
234			struct vector_traits<vec4>
235			{
236			typedef GLfloat basetype;
237			static const int dimension () { return 4; }
238			};
239
240			template<>
241			struct vector_traits<tex2>
242			{
243			typedef GLfloat basetype;
244			static const int dimension () { return 2; }
245			};
246
247			template<>
248			struct vector_traits<colour>
249			{
250			typedef GLubyte basetype;
251			static const int dimension () { return 4; }
252			};
253
254	root	1.37	struct box
255			{
256	root	1.27	point a, b;
257	root	1.8
258			box() { };
259	root	1.1
260			void reset ()
261			{
262	root	1.27	a = point ( FLT_MAX, FLT_MAX, FLT_MAX);
263			b = point (-FLT_MAX, -FLT_MAX, -FLT_MAX);
264	root	1.1	}
265
266			void add (const box &o);
267			void add (const point &p);
268			};
269	root	1.5
270	root	1.27	struct entity;
271			struct geometry;
272	root	1.20	struct view;
273	root	1.32	struct octant;
274	root	1.7
275	root	1.37	extern struct timer
276			{
277	root	1.7	static double now;
278			static double diff;
279	root	1.44	static double fps;
280	root	1.7
281			static void frame ();
282			timer ();
283			} timer;
284	root	1.11
285	root	1.13	/*
286	root	1.11	#define MAX_EVENT_TYPES 10
287			enum event_type { TIMER_EV };
288	root	1.37	struct event
289			{
290	root	1.11	event_type type;
291			};
292
293			typedef callback1<void, event&> event_cb;
294
295	root	1.37	class skedjuhlar
296			{
297	root	1.11	public:
298			// only 10 types for now
299			private:
300			vector <list<event_cb> > event_lists;
301
302			public:
303			skedjuhlar () {
304			event_lists.resize (MAX_EVENT_TYPES, list<event_cb>());
305			}
306
307			void register_event_cb (const event_type &t, const event_cb &e) {
308			event_lists[t].push_back (e);
309			};
310			void send_event (event &e) {
311			list<event_cb> &l = event_lists[e.type];
312			for (list<event_cb>::iterator it = l.begin (); it != l.end (); it++) {
313			(*it)(e);
314			}
315			};
316			void check_events () {
317			while (!events.empty ()) {
318			event &e = events.pop_front ();
319			list<event_cb> &l = event_lists[e->name];
320			for (list<event_cb>::iterator it = l.begin (); it !+ l.end (); it++) {
321			(*it)(e);
322			}
323			delete e; // ugly slow? hai hai..... 183G
324			}
325			}
326			};
327
328			extern skedjuhlar main_scheduler;
329	root	1.13	*/
330	root	1.22
331	root	1.37	namespace gl
332			{
333	root	1.41	#ifdef DEBUG
334			void errchk (const char name, const char args, const char *file, int line);
335			#endif
336
337	root	1.40	struct vertex_v3f
338			{
339	root	1.56	point v; // vertex
340	root	1.40
341			vertex_v3f () { };
342	root	1.56	vertex_v3f (point v) : v(v) { };
343	root	1.40	};
344
345			struct vertex_t2f_n3f_v3f
346			{
347			tex2 t; // texture
348			vec3 n; // normal
349	root	1.56	point v; // vertex
350	root	1.40
351	root	1.48	vertex_t2f_n3f_v3f () { }
352	root	1.56	vertex_t2f_n3f_v3f (point v, vec3 n, tex2 t = tex2()) : v(v), n(n), t(t) { }
353			};
354	root	1.40
355	root	1.56	template<typename unused> class type_traits { };
356
357			template<> struct type_traits<GLfloat > { static const GLenum glenum () { return GL_FLOAT; } };
358			template<> struct type_traits<GLdouble> { static const GLenum glenum () { return GL_DOUBLE; } };
359			template<> struct type_traits<GLint > { static const GLenum glenum () { return GL_INT; } };
360			template<> struct type_traits<GLuint > { static const GLenum glenum () { return GL_UNSIGNED_INT; } };
361			template<> struct type_traits<GLshort > { static const GLenum glenum () { return GL_SHORT; } };
362			template<> struct type_traits<GLushort> { static const GLenum glenum () { return GL_UNSIGNED_SHORT; } };
363			template<> struct type_traits<GLbyte > { static const GLenum glenum () { return GL_BYTE; } };
364			template<> struct type_traits<GLubyte > { static const GLenum glenum () { return GL_UNSIGNED_BYTE; } };
365			template<> struct type_traits<vertex_v3f > { static const GLenum glenum () { return GL_V3F; } };
366			template<> struct type_traits<vertex_t2f_n3f_v3f> { static const GLenum glenum () { return GL_T2F_N3F_V3F; } };
367
368			template<GLenum unused> class enum_traits { };
369
370			template<> struct enum_traits<GL_FLOAT > { typedef GLfloat type; };
371			template<> struct enum_traits<GL_DOUBLE > { typedef GLdouble type; };
372			template<> struct enum_traits<GL_INT > { typedef GLint type; };
373			template<> struct enum_traits<GL_UNSIGNED_INT > { typedef GLuint type; };
374			template<> struct enum_traits<GL_SHORT > { typedef GLshort type; };
375			template<> struct enum_traits<GL_UNSIGNED_SHORT> { typedef GLushort type; };
376			template<> struct enum_traits<GL_BYTE > { typedef GLbyte type; };
377			template<> struct enum_traits<GL_UNSIGNED_BYTE > { typedef GLubyte type; };
378			template<> struct enum_traits<GL_V3F > { typedef vertex_v3f type; };
379			template<> struct enum_traits<GL_T2F_N3F_V3F > { typedef vertex_t2f_n3f_v3f type; };
380	root	1.34
381	root	1.56	// deprecated:
382	root	1.49	GLsizei format_stride (GLenum format);
383			GLsizei format_offset_p (GLenum format);
384			GLsizei format_offset_n (GLenum format);
385			GLsizei format_offset_t (GLenum format);
386
387	root	1.41	struct matrix
388			{
389			GLfloat data[4][4];
390
391			const GLfloat operator ()(int i, int j) const { return data[j][i]; };
392			GLfloat &operator ()(int i, int j) { return data[j][i]; };
393
394			operator GLfloat *() { return &data[0][0]; }
395
396			void diagonal (GLfloat v);
397			void clear () { diagonal (0.F); };
398			void identity () { diagonal (1.F); };
399
400			void print (); // ugly
401
402	root	1.54	static matrix translation (const vec3 &v);
403			static matrix rotation (GLfloat degrees, const vec3 &axis);
404			static matrix scaling (GLfloat sx, GLfloat sy, GLfloat sz, GLfloat w = 1.F);
405	root	1.41
406			matrix () { };
407			matrix (GLfloat diag) { diagonal (diag); };
408			};
409
410	root	1.54	matrix operator *(const matrix &a, const matrix &b);
411			vec3 operator *(const matrix &a, const vec3 &v);
412	root	1.40
413	root	1.48	template<GLenum target>
414	root	1.56	struct vertex_buffer_object
415			{
416	root	1.40	GLuint buffer;
417			GLenum format;
418	root	1.52	GLsizei count;
419	root	1.56	GLsizei size;
420	root	1.40
421	root	1.48	bool alloc ()
422	root	1.40	{
423	root	1.48	if (buffer)
424			return false;
425
426			glGenBuffersARB (1, &buffer);
427			return true;
428	root	1.40	}
429
430	root	1.48	void bind ()
431	root	1.40	{
432			glBindBufferARB (target, buffer);
433			}
434
435	root	1.56	template<class basetype>
436			void set (const basetype *d, GLsizei count, GLenum usage = GL_STATIC_DRAW_ARB)
437	root	1.40	{
438			alloc ();
439	root	1.56	format = type_traits<basetype>::glenum ();
440	root	1.52	this->count = count;
441	root	1.56	size = sizeof (basetype);
442	root	1.55	vertex_buffer_object::bind ();
443	root	1.56	glBufferDataARB (target, count * this->size, d, usage);
444	root	1.40	}
445
446	root	1.48	template<class data>
447			void set (const vector<data> &d, GLenum usage = GL_STATIC_DRAW_ARB)
448	root	1.40	{
449	root	1.48	set (&d[0], d.size (), usage);
450	root	1.40	}
451
452	root	1.56	template<typename basetype>
453			void set (GLsizei count, GLenum usage = GL_DYNAMIC_DRAW_ARB)
454	root	1.55	{
455			alloc ();
456	root	1.56	format = type_traits<basetype>::glenum ();
457			this->count = count;
458			size = sizeof (basetype);
459	root	1.55	vertex_buffer_object::bind ();
460	root	1.56	glBufferDataARB (target, this->count * size, 0, usage);
461	root	1.55	}
462
463			void *map (GLenum access = GL_WRITE_ONLY)
464			{
465			vertex_buffer_object::bind ();
466			return glMapBufferARB (target, access);
467			}
468
469			void unmap ()
470			{
471			vertex_buffer_object::bind ();
472			glUnmapBuffer (target);
473			}
474
475	root	1.54	vertex_buffer_object ()
476	root	1.40	: buffer(0)
477			{
478			}
479
480	root	1.54	~vertex_buffer_object ()
481	root	1.40	{
482	root	1.48	if (buffer)
483			glDeleteBuffersARB (1, &buffer);
484	root	1.40	}
485
486			operator GLint ()
487			{
488			return buffer;
489			}
490			};
491
492	root	1.56	struct vertex_buffer : vertex_buffer_object<GL_ARRAY_BUFFER_ARB>
493			{
494	root	1.48	void bind ()
495			{
496	root	1.54	vertex_buffer_object<GL_ARRAY_BUFFER_ARB>::bind ();
497	root	1.56	glInterleavedArrays (format, 0, 0);
498	root	1.48	}
499
500			void draw (GLenum mode, GLint first, GLsizei count)
501			{
502			bind ();
503			glDrawArrays (mode, first, count);
504			}
505			};
506
507	root	1.56	struct index_buffer : vertex_buffer_object<GL_ELEMENT_ARRAY_BUFFER_ARB>
508			{
509	root	1.48	void draw (GLenum mode, GLint first, GLsizei count)
510			{
511			bind ();
512	root	1.56	glDrawElements (mode, count, format, (GLvoid )((char )0 + first * size)); // only SHORT supported :( // first //D//TODO
513	root	1.48	}
514			};
515
516			void draw_bbox (const sector &a, const sector &b);
517	root	1.49
518	root	1.31	}
519
520	root	1.40	GLuint SDL_GL_LoadTexture (SDL_Surface surface, GLfloat texcoord);
521	root	1.27
522	root	1.1	#endif
523