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 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;
}

inline const GLfloat norm (const vec3 &v)
{
  return sqrtf (dot (v, v));
}

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);

typedef vec3 point;

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

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

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

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 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
{
  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; }
  };

  extern int nesting;
  void errchk (const char *name, const char *args, const char *file, int line);

  struct vertex_buffer_object {
    GLuint buffer;
    GLenum format;

    void alloc ()
    {
      if (!buffer)
        glGenBuffersARB (1, &buffer);
    }

    void bind (GLenum target = GL_ARRAY_BUFFER_ARB)
    {
      glBindBufferARB (target, buffer);
      glInterleavedArrays (format, 0, 0);
    }

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

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

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

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

    operator GLint ()
    {
      return buffer;
    }
  };

  const GLenum  bbox_mode  = GL_QUADS;
  const GLsizei bbox_count = 6*4;
  void gen_bbox (vertex_buffer_object &vb, const sector &a, const sector &b);
}

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

#endif

Revision:	1.40
Committed:	Sat Oct 16 23:23:21 2004 UTC (21 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.39:	+95 -7 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	1.37	struct vec3
87			{
88	root	1.1	GLfloat x, y, z;
89			vec3 () { };
90	root	1.32	vec3 (GLfloat s) : x(s), y(s), z(s) { };
91	root	1.1	vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
92	root	1.32	vec3 (const sector &s) : x(s.x), y(s.y), z(s.z) { };
93	root	1.1
94			const vec3 operator -() const
95			{ return vec3 (-x, -y, -z); }
96			};
97
98			const vec3 normalize (const vec3 &v);
99			const vec3 cross (const vec3 &a, const vec3 &b);
100	root	1.6
101			inline const vec3 operator *(const vec3 &a, GLfloat s)
102			{
103			return vec3 (a.x * s, a.y * s, a.z * s);
104			}
105
106	root	1.27	inline const vec3 operator +(const vec3 &a, const vec3 &b)
107			{
108			return vec3 (a.x + b.x, a.y + b.y, a.z + b.z);
109			}
110
111			inline const vec3 operator -(const vec3 &a, const vec3 &b)
112			{
113			return vec3 (a.x - b.x, a.y - b.y, a.z - b.z);
114			}
115
116	root	1.6	inline GLfloat dot (const vec3 &a, const vec3 &b)
117			{
118			return a.x * b.x + a.y * b.y + a.z * b.z;
119			}
120
121	root	1.39	inline const GLfloat norm (const vec3 &v)
122	root	1.6	{
123			return sqrtf (dot (v, v));
124			}
125	root	1.1
126	root	1.37	struct matrix
127			{
128	root	1.5	GLfloat data[4][4];
129
130	root	1.12	const GLfloat operator ()(int i, int j) const { return data[j][i]; };
131			GLfloat &operator ()(int i, int j) { return data[j][i]; };
132	root	1.5
133	root	1.33	operator GLfloat *() { return &data[0][0]; }
134
135	root	1.5	void diagonal (GLfloat v);
136	root	1.32	void clear () { diagonal (0.F); };
137			void identity () { diagonal (1.F); };
138	root	1.5
139			void print (); // ugly
140
141	root	1.16	static const matrix translation (const vec3 &v);
142			static const matrix rotation (GLfloat degrees, const vec3 &axis);
143	root	1.5
144	root	1.16	matrix () { };
145			matrix (GLfloat diag) { diagonal (diag); };
146	root	1.5	};
147
148	root	1.16	const matrix operator *(const matrix &a, const matrix &b);
149			const vec3 operator *(const matrix &a, const vec3 &v);
150	root	1.10
151			typedef vec3 point;
152
153			// a generic plane
154	root	1.37	struct plane
155			{
156	root	1.10	vec3 n;
157			GLfloat d;
158
159			GLfloat distance (const point &p) const
160			{
161			return dot (n, p) + d;
162			}
163
164			plane () { };
165			plane (GLfloat a, GLfloat b, GLfloat c, GLfloat d);
166			};
167
168			void renormalize (sector &s, point &p);
169
170	root	1.37	struct colour
171			{
172	root	1.40	GLubyte r, g, b, a;
173			colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.)
174			: r(GLubyte (r * 255.F + .5F))
175			, g(GLubyte (g * 255.F + .5F))
176			, b(GLubyte (b * 255.F + .5F))
177			, a(GLubyte (a * 255.F + .5F))
178			{
179			}
180	root	1.10	};
181	root	1.5
182	root	1.40	struct tex2
183	root	1.37	{
184	root	1.1	GLfloat s, t;
185	root	1.40	tex2 () { };
186			tex2 (GLfloat s, GLfloat t) : s(s), t(t) { };
187	root	1.1	};
188
189	root	1.37	struct box
190			{
191	root	1.27	point a, b;
192	root	1.8
193			box() { };
194	root	1.1
195			void reset ()
196			{
197	root	1.27	a = point ( FLT_MAX, FLT_MAX, FLT_MAX);
198			b = point (-FLT_MAX, -FLT_MAX, -FLT_MAX);
199	root	1.1	}
200
201			void add (const box &o);
202			void add (const point &p);
203			};
204	root	1.5
205	root	1.27	struct entity;
206			struct geometry;
207	root	1.20	struct view;
208	root	1.32	struct octant;
209	root	1.7
210	root	1.37	extern struct timer
211			{
212	root	1.7	static double now;
213			static double diff;
214
215			static void frame ();
216			timer ();
217			} timer;
218	root	1.11
219	root	1.13	/*
220	root	1.11	#define MAX_EVENT_TYPES 10
221			enum event_type { TIMER_EV };
222	root	1.37	struct event
223			{
224	root	1.11	event_type type;
225			};
226
227			typedef callback1<void, event&> event_cb;
228
229	root	1.37	class skedjuhlar
230			{
231	root	1.11	public:
232			// only 10 types for now
233			private:
234			vector <list<event_cb> > event_lists;
235
236			public:
237			skedjuhlar () {
238			event_lists.resize (MAX_EVENT_TYPES, list<event_cb>());
239			}
240
241			void register_event_cb (const event_type &t, const event_cb &e) {
242			event_lists[t].push_back (e);
243			};
244			void send_event (event &e) {
245			list<event_cb> &l = event_lists[e.type];
246			for (list<event_cb>::iterator it = l.begin (); it != l.end (); it++) {
247			(*it)(e);
248			}
249			};
250			void check_events () {
251			while (!events.empty ()) {
252			event &e = events.pop_front ();
253			list<event_cb> &l = event_lists[e->name];
254			for (list<event_cb>::iterator it = l.begin (); it !+ l.end (); it++) {
255			(*it)(e);
256			}
257			delete e; // ugly slow? hai hai..... 183G
258			}
259			}
260			};
261
262			extern skedjuhlar main_scheduler;
263	root	1.13	*/
264	root	1.22
265	root	1.37	namespace gl
266			{
267	root	1.40	struct vertex_v3f
268			{
269			point p; // vertex
270
271			vertex_v3f () { };
272			vertex_v3f (point p) : p(p) { };
273
274			GLenum gl_format () const { return GL_V3F; }
275			};
276
277			struct vertex_t2f_n3f_v3f
278			{
279			tex2 t; // texture
280			vec3 n; // normal
281			point p; // vertex
282
283			vertex_t2f_n3f_v3f () { };
284			vertex_t2f_n3f_v3f (point p, vec3 n, tex2 t = tex2()) : p(p), n(n), t(t) { };
285
286			GLenum gl_format () const { return GL_T2F_N3F_V3F; }
287			};
288	root	1.34
289	root	1.35	extern int nesting;
290	root	1.34	void errchk (const char name, const char args, const char *file, int line);
291	root	1.40
292			struct vertex_buffer_object {
293			GLuint buffer;
294			GLenum format;
295
296			void alloc ()
297			{
298			if (!buffer)
299			glGenBuffersARB (1, &buffer);
300			}
301
302			void bind (GLenum target = GL_ARRAY_BUFFER_ARB)
303			{
304			glBindBufferARB (target, buffer);
305			glInterleavedArrays (format, 0, 0);
306			}
307
308			void draw (GLenum mode, GLint first, GLsizei count)
309			{
310			bind ();
311			glDrawArrays (mode, first, count);
312			}
313
314			template<class vertex>
315			void set (const vertex *v, GLsizei count, GLenum usage = GL_STATIC_DRAW_ARB, GLenum target = GL_ARRAY_BUFFER_ARB)
316			{
317			alloc ();
318			format = v->gl_format ();
319			glBindBufferARB (target, buffer);
320			glBufferDataARB (target, count * sizeof (vertex), v, usage);
321			}
322
323			template<class vertex>
324			void set (const vector<vertex> &v, GLenum usage = GL_STATIC_DRAW_ARB, GLenum target = GL_ARRAY_BUFFER_ARB)
325			{
326			set (&v[0], v.size (), usage, target);
327			}
328
329			vertex_buffer_object ()
330			: buffer(0)
331			{
332			}
333
334			~vertex_buffer_object ()
335			{
336			glDeleteBuffersARB (1, &buffer);
337			}
338
339			operator GLint ()
340			{
341			return buffer;
342			}
343			};
344
345			const GLenum bbox_mode = GL_QUADS;
346			const GLsizei bbox_count = 6*4;
347			void gen_bbox (vertex_buffer_object &vb, const sector &a, const sector &b);
348	root	1.31	}
349
350	root	1.40	GLuint SDL_GL_LoadTexture (SDL_Surface surface, GLfloat texcoord);
351	root	1.27
352	root	1.1	#endif
353