libgender/util.h

#ifndef UTIL_H
#define UTIL_H

#include <SDL/SDL.h>
#include <SDL/SDL_image.h>
#include <cmath>
#include <cfloat>
#include <vector>
#include <string>

#include <Cg/cg.h>
#include <Cg/cgGL.h>

#define GL_LG_DEBUG do { GLenum gl_derror = glGetError (); if (gl_derror != GL_NO_ERROR) fprintf (stderr, "%s:%d GLERROR: %d\n", __FILE__, __LINE__, gl_derror); } while (0)

using namespace std;

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

#include <GL/gl.h>

typedef int soffs; // 32 bit
typedef unsigned int uoffs;
#define OFFS_BITS 31
#define SOFFS_MIN (soffs)-(1 << (OFFS_BITS - 2))
#define SOFFS_MAX (soffs)+(1 << (OFFS_BITS - 2))
#define MAXEXTENT (1UL << (OFFS_BITS - 1))

#define GLFLOAT_MAX 1e30
#define GLFLOAT_MIN -1e30

struct vec3 {
  GLfloat x, y, z;
  vec3 () { };
  vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(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 abs (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]; };

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

  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);
};

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 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));
}

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

struct colour {
  GLfloat r, g, b, a;
  colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.) : r(r), g(g), b(b), a(a) { };
};

struct texc {
  GLfloat s, t;
  texc () { };
  texc (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 light {
  point p;
  colour c;
  GLfloat intensity;
  GLfloat radius;
};

struct material {
  colour diffuse, specular, emission;
  GLfloat shininess;

  material () 
  { 
    diffuse   = colour (1, 0, 1, 1);
    specular  = colour (1, 0, 1, 1);
    emission  = colour (1, 0, 1, 1);
    shininess = 1;
  }
};

struct entity;
struct geometry;
struct view;

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;
*/

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

inline int power_of_two (int input)
{
  int value = 1;

  while (value < input)
    {
      value <<= 1;
    }
  return value;
}

struct TextureExecption { 
  TextureExecption (string s) : msg(s) { }
  string msg; 
};

struct Texture {
  SDL_Surface *image;
  GLuint texture;
  GLfloat texcoord[4];

public:

  Texture(const char *f)
  {
    image = IMG_Load (f);

    if (!image) 
      throw (TextureExecption ("Couldn't load " + (string) f + ": " + (string) IMG_GetError ()));

    texture = SDL_GL_LoadTexture (image, (GLfloat*)&texcoord);
    if (texture == 0) 
      throw (TextureExecption ("Couldn't make GL Texture, failed to create new RGB SWSurface"));
  }
};

#endif

Revision:	1.30
Committed:	Fri Oct 8 16:52:49 2004 UTC (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.29:	+2 -0 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#ifndef UTIL_H
2			#define UTIL_H
3
4	root	1.22	#include <SDL/SDL.h>
5			#include <SDL/SDL_image.h>
6	root	1.7	#include <cmath>
7	root	1.27	#include <cfloat>
8	root	1.1	#include <vector>
9	root	1.22	#include <string>
10	root	1.1
11	root	1.18	#include <Cg/cg.h>
12			#include <Cg/cgGL.h>
13
14	root	1.30	#define GL_LG_DEBUG do { GLenum gl_derror = glGetError (); if (gl_derror != GL_NO_ERROR) fprintf (stderr, "%s:%d GLERROR: %d\n", __FILE__, __LINE__, gl_derror); } while (0)
15
16	root	1.1	using namespace std;
17	root	1.18
18			extern CGcontext cgc;
19			extern CGprogram vsh;
20			extern CGprogram fsh;
21	root	1.19	extern CGparameter mv, mvp, lightpos;
22	root	1.21	extern CGprofile vsh_profile, fsh_profile;
23	root	1.1
24	root	1.7	#include <GL/gl.h>
25
26	root	1.3	typedef int soffs; // 32 bit
27			typedef unsigned int uoffs;
28	root	1.4	#define OFFS_BITS 31
29	root	1.9	#define SOFFS_MIN (soffs)-(1 << (OFFS_BITS - 2))
30			#define SOFFS_MAX (soffs)+(1 << (OFFS_BITS - 2))
31			#define MAXEXTENT (1UL << (OFFS_BITS - 1))
32	root	1.1
33			#define GLFLOAT_MAX 1e30
34			#define GLFLOAT_MIN -1e30
35
36			struct vec3 {
37			GLfloat x, y, z;
38			vec3 () { };
39			vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
40
41			const vec3 operator -() const
42			{ return vec3 (-x, -y, -z); }
43			};
44
45			const vec3 normalize (const vec3 &v);
46			const vec3 cross (const vec3 &a, const vec3 &b);
47	root	1.6
48			inline const vec3 operator *(const vec3 &a, GLfloat s)
49			{
50			return vec3 (a.x * s, a.y * s, a.z * s);
51			}
52
53	root	1.27	inline const vec3 operator +(const vec3 &a, const vec3 &b)
54			{
55			return vec3 (a.x + b.x, a.y + b.y, a.z + b.z);
56			}
57
58			inline const vec3 operator -(const vec3 &a, const vec3 &b)
59			{
60			return vec3 (a.x - b.x, a.y - b.y, a.z - b.z);
61			}
62
63	root	1.6	inline GLfloat dot (const vec3 &a, const vec3 &b)
64			{
65			return a.x * b.x + a.y * b.y + a.z * b.z;
66			}
67
68			inline const GLfloat abs (const vec3 &v)
69			{
70			return sqrtf (dot (v, v));
71			}
72	root	1.1
73	root	1.16	struct matrix {
74	root	1.5	GLfloat data[4][4];
75
76	root	1.12	const GLfloat operator ()(int i, int j) const { return data[j][i]; };
77			GLfloat &operator ()(int i, int j) { return data[j][i]; };
78	root	1.5
79			void diagonal (GLfloat v);
80			void clear () { diagonal (0.); };
81			void identity () { diagonal (1.); };
82
83			void print (); // ugly
84
85	root	1.16	static const matrix translation (const vec3 &v);
86			static const matrix rotation (GLfloat degrees, const vec3 &axis);
87	root	1.5
88	root	1.16	matrix () { };
89			matrix (GLfloat diag) { diagonal (diag); };
90	root	1.5	};
91
92	root	1.16	const matrix operator *(const matrix &a, const matrix &b);
93			const vec3 operator *(const matrix &a, const vec3 &v);
94	root	1.10
95			typedef vec3 point;
96
97			// a generic plane
98	root	1.12	struct plane {
99	root	1.10	vec3 n;
100			GLfloat d;
101
102			GLfloat distance (const point &p) const
103			{
104			return dot (n, p) + d;
105			}
106
107			plane () { };
108			plane (GLfloat a, GLfloat b, GLfloat c, GLfloat d);
109			};
110
111			struct sector {
112			soffs x, y, z;
113
114	root	1.28	sector (soffs x, soffs y, soffs z) : x(x), y(y), z(z) { };
115			sector (soffs xyz = 0) : x(xyz), y(xyz), z(xyz) { };
116	root	1.10
117			void offset (int subindex, uoffs extent)
118			{
119			if (subindex & 1) x += extent;
120			if (subindex & 2) y += extent;
121			if (subindex & 4) z += extent;
122			}
123			};
124
125	root	1.28	inline sector operator +(const sector &a, const sector &b)
126	root	1.23	{
127			return sector (a.x + b.x, a.y + b.y, a.z + b.z);
128			}
129
130	root	1.28	inline sector operator -(const sector &a, const sector &b)
131	root	1.23	{
132			return sector (a.x - b.x, a.y - b.y, a.z - b.z);
133			}
134
135	root	1.28	inline sector operator /(const sector &a, soffs b)
136			{
137			return sector (a.x / b, a.y / b, a.z / b);
138			}
139
140			inline bool operator <=(const sector &a, const sector &b)
141			{
142			return a.x <= b.x && a.y <= b.y && a.z <= b.z;
143			}
144
145	root	1.29	inline soffs max (const sector &a)
146			{
147			return max (a.x, max (a.y, a.z));
148			}
149
150	root	1.28	inline sector translate (const sector &p, const sector &src, const sector &dst)
151	root	1.10	{
152	root	1.27	return p + (dst - src);
153	root	1.28	}
154
155			inline sector abs (const sector &s)
156			{
157			return sector (abs (s.x), abs (s.y), abs (s.z));
158	root	1.10	}
159
160			void renormalize (sector &s, point &p);
161
162			struct colour {
163			GLfloat r, g, b, a;
164			colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.) : r(r), g(g), b(b), a(a) { };
165			};
166	root	1.5
167	root	1.1	struct texc {
168			GLfloat s, t;
169			texc () { };
170			texc (GLfloat s, GLfloat t) : s(s), t(t) { };
171			};
172
173			struct box {
174	root	1.27	point a, b;
175	root	1.8
176			box() { };
177	root	1.1
178			void reset ()
179			{
180	root	1.27	a = point ( FLT_MAX, FLT_MAX, FLT_MAX);
181			b = point (-FLT_MAX, -FLT_MAX, -FLT_MAX);
182	root	1.1	}
183
184			void add (const box &o);
185			void add (const point &p);
186			};
187	root	1.5
188	root	1.1	struct light {
189			point p;
190			colour c;
191			GLfloat intensity;
192			GLfloat radius;
193	root	1.2	};
194
195			struct material {
196			colour diffuse, specular, emission;
197			GLfloat shininess;
198	root	1.26
199			material ()
200			{
201			diffuse = colour (1, 0, 1, 1);
202			specular = colour (1, 0, 1, 1);
203			emission = colour (1, 0, 1, 1);
204			shininess = 1;
205			}
206	root	1.1	};
207
208	root	1.27	struct entity;
209			struct geometry;
210	root	1.20	struct view;
211	root	1.7
212			extern struct timer {
213			static double now;
214			static double diff;
215
216			static void frame ();
217			timer ();
218			} timer;
219	root	1.11
220	root	1.13	/*
221	root	1.11	#define MAX_EVENT_TYPES 10
222			enum event_type { TIMER_EV };
223			struct event {
224			event_type type;
225			};
226
227			typedef callback1<void, event&> event_cb;
228
229			class skedjuhlar {
230
231			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			GLuint SDL_GL_LoadTexture (SDL_Surface * surface, GLfloat * texcoord);
266	root	1.27
267	root	1.22	inline int power_of_two (int input)
268			{
269			int value = 1;
270
271			while (value < input)
272			{
273			value <<= 1;
274			}
275			return value;
276			}
277
278			struct TextureExecption {
279	root	1.27	TextureExecption (string s) : msg(s) { }
280			string msg;
281	root	1.22	};
282	root	1.27
283	root	1.22	struct Texture {
284	root	1.27	SDL_Surface *image;
285			GLuint texture;
286			GLfloat texcoord[4];
287
288			public:
289
290			Texture(const char *f)
291			{
292			image = IMG_Load (f);
293
294			if (!image)
295			throw (TextureExecption ("Couldn't load " + (string) f + ": " + (string) IMG_GetError ()));
296	root	1.22
297	root	1.27	texture = SDL_GL_LoadTexture (image, (GLfloat*)&texcoord);
298			if (texture == 0)
299			throw (TextureExecption ("Couldn't make GL Texture, failed to create new RGB SWSurface"));
300			}
301	root	1.22	};
302	root	1.1
303			#endif
304