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>

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:	1.29
Committed:	Fri Oct 8 09:59:25 2004 UTC (21 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.28:	+5 -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	1.1	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	1.7	#include <GL/gl.h>
23
24	root	1.3	typedef int soffs; // 32 bit
25			typedef unsigned int uoffs;
26	root	1.4	#define OFFS_BITS 31
27	root	1.9	#define SOFFS_MIN (soffs)-(1 << (OFFS_BITS - 2))
28			#define SOFFS_MAX (soffs)+(1 << (OFFS_BITS - 2))
29			#define MAXEXTENT (1UL << (OFFS_BITS - 1))
30	root	1.1
31			#define GLFLOAT_MAX 1e30
32			#define GLFLOAT_MIN -1e30
33
34			struct vec3 {
35			GLfloat x, y, z;
36			vec3 () { };
37			vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
38
39			const vec3 operator -() const
40			{ return vec3 (-x, -y, -z); }
41			};
42
43			const vec3 normalize (const vec3 &v);
44			const vec3 cross (const vec3 &a, const vec3 &b);
45	root	1.6
46			inline const vec3 operator *(const vec3 &a, GLfloat s)
47			{
48			return vec3 (a.x * s, a.y * s, a.z * s);
49			}
50
51	root	1.27	inline const vec3 operator +(const vec3 &a, const vec3 &b)
52			{
53			return vec3 (a.x + b.x, a.y + b.y, a.z + b.z);
54			}
55
56			inline const vec3 operator -(const vec3 &a, const vec3 &b)
57			{
58			return vec3 (a.x - b.x, a.y - b.y, a.z - b.z);
59			}
60
61	root	1.6	inline GLfloat dot (const vec3 &a, const vec3 &b)
62			{
63			return a.x * b.x + a.y * b.y + a.z * b.z;
64			}
65
66			inline const GLfloat abs (const vec3 &v)
67			{
68			return sqrtf (dot (v, v));
69			}
70	root	1.1
71	root	1.16	struct matrix {
72	root	1.5	GLfloat data[4][4];
73
74	root	1.12	const GLfloat operator ()(int i, int j) const { return data[j][i]; };
75			GLfloat &operator ()(int i, int j) { return data[j][i]; };
76	root	1.5
77			void diagonal (GLfloat v);
78			void clear () { diagonal (0.); };
79			void identity () { diagonal (1.); };
80
81			void print (); // ugly
82
83	root	1.16	static const matrix translation (const vec3 &v);
84			static const matrix rotation (GLfloat degrees, const vec3 &axis);
85	root	1.5
86	root	1.16	matrix () { };
87			matrix (GLfloat diag) { diagonal (diag); };
88	root	1.5	};
89
90	root	1.16	const matrix operator *(const matrix &a, const matrix &b);
91			const vec3 operator *(const matrix &a, const vec3 &v);
92	root	1.10
93			typedef vec3 point;
94
95			// a generic plane
96	root	1.12	struct plane {
97	root	1.10	vec3 n;
98			GLfloat d;
99
100			GLfloat distance (const point &p) const
101			{
102			return dot (n, p) + d;
103			}
104
105			plane () { };
106			plane (GLfloat a, GLfloat b, GLfloat c, GLfloat d);
107			};
108
109			struct sector {
110			soffs x, y, z;
111
112	root	1.28	sector (soffs x, soffs y, soffs z) : x(x), y(y), z(z) { };
113			sector (soffs xyz = 0) : x(xyz), y(xyz), z(xyz) { };
114	root	1.10
115			void offset (int subindex, uoffs extent)
116			{
117			if (subindex & 1) x += extent;
118			if (subindex & 2) y += extent;
119			if (subindex & 4) z += extent;
120			}
121			};
122
123	root	1.28	inline sector operator +(const sector &a, const sector &b)
124	root	1.23	{
125			return sector (a.x + b.x, a.y + b.y, a.z + b.z);
126			}
127
128	root	1.28	inline sector operator -(const sector &a, const sector &b)
129	root	1.23	{
130			return sector (a.x - b.x, a.y - b.y, a.z - b.z);
131			}
132
133	root	1.28	inline sector operator /(const sector &a, soffs b)
134			{
135			return sector (a.x / b, a.y / b, a.z / b);
136			}
137
138			inline bool operator <=(const sector &a, const sector &b)
139			{
140			return a.x <= b.x && a.y <= b.y && a.z <= b.z;
141			}
142
143	root	1.29	inline soffs max (const sector &a)
144			{
145			return max (a.x, max (a.y, a.z));
146			}
147
148	root	1.28	inline sector translate (const sector &p, const sector &src, const sector &dst)
149	root	1.10	{
150	root	1.27	return p + (dst - src);
151	root	1.28	}
152
153			inline sector abs (const sector &s)
154			{
155			return sector (abs (s.x), abs (s.y), abs (s.z));
156	root	1.10	}
157
158			void renormalize (sector &s, point &p);
159
160			struct colour {
161			GLfloat r, g, b, a;
162			colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.) : r(r), g(g), b(b), a(a) { };
163			};
164	root	1.5
165	root	1.1	struct texc {
166			GLfloat s, t;
167			texc () { };
168			texc (GLfloat s, GLfloat t) : s(s), t(t) { };
169			};
170
171			struct box {
172	root	1.27	point a, b;
173	root	1.8
174			box() { };
175	root	1.1
176			void reset ()
177			{
178	root	1.27	a = point ( FLT_MAX, FLT_MAX, FLT_MAX);
179			b = point (-FLT_MAX, -FLT_MAX, -FLT_MAX);
180	root	1.1	}
181
182			void add (const box &o);
183			void add (const point &p);
184			};
185	root	1.5
186	root	1.1	struct light {
187			point p;
188			colour c;
189			GLfloat intensity;
190			GLfloat radius;
191	root	1.2	};
192
193			struct material {
194			colour diffuse, specular, emission;
195			GLfloat shininess;
196	root	1.26
197			material ()
198			{
199			diffuse = colour (1, 0, 1, 1);
200			specular = colour (1, 0, 1, 1);
201			emission = colour (1, 0, 1, 1);
202			shininess = 1;
203			}
204	root	1.1	};
205
206	root	1.27	struct entity;
207			struct geometry;
208	root	1.20	struct view;
209	root	1.7
210			extern struct timer {
211			static double now;
212			static double diff;
213
214			static void frame ();
215			timer ();
216			} timer;
217	root	1.11
218	root	1.13	/*
219	root	1.11	#define MAX_EVENT_TYPES 10
220			enum event_type { TIMER_EV };
221			struct event {
222			event_type type;
223			};
224
225			typedef callback1<void, event&> event_cb;
226
227			class skedjuhlar {
228
229			public:
230			// only 10 types for now
231			private:
232			vector <list<event_cb> > event_lists;
233
234			public:
235			skedjuhlar () {
236			event_lists.resize (MAX_EVENT_TYPES, list<event_cb>());
237			}
238
239			void register_event_cb (const event_type &t, const event_cb &e) {
240			event_lists[t].push_back (e);
241			};
242			void send_event (event &e) {
243			list<event_cb> &l = event_lists[e.type];
244			for (list<event_cb>::iterator it = l.begin (); it != l.end (); it++) {
245			(*it)(e);
246			}
247			};
248			void check_events () {
249			while (!events.empty ()) {
250			event &e = events.pop_front ();
251			list<event_cb> &l = event_lists[e->name];
252			for (list<event_cb>::iterator it = l.begin (); it !+ l.end (); it++) {
253			(*it)(e);
254			}
255			delete e; // ugly slow? hai hai..... 183G
256			}
257			}
258			};
259
260			extern skedjuhlar main_scheduler;
261	root	1.13	*/
262	root	1.22
263			GLuint SDL_GL_LoadTexture (SDL_Surface * surface, GLfloat * texcoord);
264	root	1.27
265	root	1.22	inline int power_of_two (int input)
266			{
267			int value = 1;
268
269			while (value < input)
270			{
271			value <<= 1;
272			}
273			return value;
274			}
275
276			struct TextureExecption {
277	root	1.27	TextureExecption (string s) : msg(s) { }
278			string msg;
279	root	1.22	};
280	root	1.27
281	root	1.22	struct Texture {
282	root	1.27	SDL_Surface *image;
283			GLuint texture;
284			GLfloat texcoord[4];
285
286			public:
287
288			Texture(const char *f)
289			{
290			image = IMG_Load (f);
291
292			if (!image)
293			throw (TextureExecption ("Couldn't load " + (string) f + ": " + (string) IMG_GetError ()));
294	root	1.22
295	root	1.27	texture = SDL_GL_LoadTexture (image, (GLfloat*)&texcoord);
296			if (texture == 0)
297			throw (TextureExecption ("Couldn't make GL Texture, failed to create new RGB SWSurface"));
298			}
299	root	1.22	};
300	root	1.1
301			#endif
302