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>

#include <GL/gl.h>
#include <GL/glext.h>
#include "gldebug.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))

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));
}

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 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]; };

  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 {
  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;
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 {
  void draw_box (const view &ctx, const sector &a, const sector &b);

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

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:	1.35
Committed:	Sat Oct 9 23:12:07 2004 UTC (21 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.34:	+1 -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	1.34	#include <GL/gl.h>
15			#include <GL/glext.h>
16			#include "gldebug.h"
17	root	1.30
18	root	1.1	using namespace std;
19	root	1.18
20			extern CGcontext cgc;
21			extern CGprogram vsh;
22			extern CGprogram fsh;
23	root	1.19	extern CGparameter mv, mvp, lightpos;
24	root	1.21	extern CGprofile vsh_profile, fsh_profile;
25	root	1.1
26	root	1.7	#include <GL/gl.h>
27
28	root	1.3	typedef int soffs; // 32 bit
29			typedef unsigned int uoffs;
30	root	1.4	#define OFFS_BITS 31
31	root	1.9	#define SOFFS_MIN (soffs)-(1 << (OFFS_BITS - 2))
32			#define SOFFS_MAX (soffs)+(1 << (OFFS_BITS - 2))
33			#define MAXEXTENT (1UL << (OFFS_BITS - 1))
34	root	1.1
35	root	1.32	struct sector {
36			soffs x, y, z;
37
38			sector (soffs x, soffs y, soffs z) : x(x), y(y), z(z) { };
39			sector (soffs xyz = 0) : x(xyz), y(xyz), z(xyz) { };
40
41			void offset (int subindex, uoffs extent)
42			{
43			if (subindex & 1) x += extent;
44			if (subindex & 2) y += extent;
45			if (subindex & 4) z += extent;
46			}
47			};
48
49			inline sector operator +(const sector &a, const sector &b)
50			{
51			return sector (a.x + b.x, a.y + b.y, a.z + b.z);
52			}
53
54			inline sector operator -(const sector &a, const sector &b)
55			{
56			return sector (a.x - b.x, a.y - b.y, a.z - b.z);
57			}
58
59			inline sector operator /(const sector &a, soffs b)
60			{
61			return sector (a.x / b, a.y / b, a.z / b);
62			}
63
64			inline bool operator <=(const sector &a, const sector &b)
65			{
66			return a.x <= b.x && a.y <= b.y && a.z <= b.z;
67			}
68
69			inline soffs max (const sector &a)
70			{
71			return max (a.x, max (a.y, a.z));
72			}
73
74			inline sector translate (const sector &p, const sector &src, const sector &dst)
75			{
76			return p + (dst - src);
77			}
78
79			inline sector abs (const sector &s)
80			{
81			return sector (abs (s.x), abs (s.y), abs (s.z));
82			}
83	root	1.1
84			struct vec3 {
85			GLfloat x, y, z;
86			vec3 () { };
87	root	1.32	vec3 (GLfloat s) : x(s), y(s), z(s) { };
88	root	1.1	vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
89	root	1.32	vec3 (const sector &s) : x(s.x), y(s.y), z(s.z) { };
90	root	1.1
91			const vec3 operator -() const
92			{ return vec3 (-x, -y, -z); }
93			};
94
95			const vec3 normalize (const vec3 &v);
96			const vec3 cross (const vec3 &a, const vec3 &b);
97	root	1.6
98			inline const vec3 operator *(const vec3 &a, GLfloat s)
99			{
100			return vec3 (a.x * s, a.y * s, a.z * s);
101			}
102
103	root	1.27	inline const vec3 operator +(const vec3 &a, const vec3 &b)
104			{
105			return vec3 (a.x + b.x, a.y + b.y, a.z + b.z);
106			}
107
108			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	root	1.6	inline GLfloat dot (const vec3 &a, const vec3 &b)
114			{
115			return a.x * b.x + a.y * b.y + a.z * b.z;
116			}
117
118			inline const GLfloat abs (const vec3 &v)
119			{
120			return sqrtf (dot (v, v));
121			}
122	root	1.1
123	root	1.16	struct matrix {
124	root	1.5	GLfloat data[4][4];
125
126	root	1.12	const GLfloat operator ()(int i, int j) const { return data[j][i]; };
127			GLfloat &operator ()(int i, int j) { return data[j][i]; };
128	root	1.5
129	root	1.33	operator GLfloat *() { return &data[0][0]; }
130
131	root	1.5	void diagonal (GLfloat v);
132	root	1.32	void clear () { diagonal (0.F); };
133			void identity () { diagonal (1.F); };
134	root	1.5
135			void print (); // ugly
136
137	root	1.16	static const matrix translation (const vec3 &v);
138			static const matrix rotation (GLfloat degrees, const vec3 &axis);
139	root	1.5
140	root	1.16	matrix () { };
141			matrix (GLfloat diag) { diagonal (diag); };
142	root	1.5	};
143
144	root	1.16	const matrix operator *(const matrix &a, const matrix &b);
145			const vec3 operator *(const matrix &a, const vec3 &v);
146	root	1.10
147			typedef vec3 point;
148
149			// a generic plane
150	root	1.12	struct plane {
151	root	1.10	vec3 n;
152			GLfloat d;
153
154			GLfloat distance (const point &p) const
155			{
156			return dot (n, p) + d;
157			}
158
159			plane () { };
160			plane (GLfloat a, GLfloat b, GLfloat c, GLfloat d);
161			};
162
163			void renormalize (sector &s, point &p);
164
165			struct colour {
166			GLfloat r, g, b, a;
167			colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.) : r(r), g(g), b(b), a(a) { };
168			};
169	root	1.5
170	root	1.1	struct texc {
171			GLfloat s, t;
172			texc () { };
173			texc (GLfloat s, GLfloat t) : s(s), t(t) { };
174			};
175
176			struct box {
177	root	1.27	point a, b;
178	root	1.8
179			box() { };
180	root	1.1
181			void reset ()
182			{
183	root	1.27	a = point ( FLT_MAX, FLT_MAX, FLT_MAX);
184			b = point (-FLT_MAX, -FLT_MAX, -FLT_MAX);
185	root	1.1	}
186
187			void add (const box &o);
188			void add (const point &p);
189			};
190	root	1.5
191	root	1.1	struct light {
192			point p;
193			colour c;
194			GLfloat intensity;
195			GLfloat radius;
196	root	1.2	};
197
198			struct material {
199			colour diffuse, specular, emission;
200			GLfloat shininess;
201	root	1.26
202			material ()
203			{
204			diffuse = colour (1, 0, 1, 1);
205			specular = colour (1, 0, 1, 1);
206			emission = colour (1, 0, 1, 1);
207			shininess = 1;
208			}
209	root	1.1	};
210
211	root	1.27	struct entity;
212			struct geometry;
213	root	1.20	struct view;
214	root	1.32	struct octant;
215	root	1.7
216			extern struct timer {
217			static double now;
218			static double diff;
219
220			static void frame ();
221			timer ();
222			} timer;
223	root	1.11
224	root	1.13	/*
225	root	1.11	#define MAX_EVENT_TYPES 10
226			enum event_type { TIMER_EV };
227			struct event {
228			event_type type;
229			};
230
231			typedef callback1<void, event&> event_cb;
232
233			class skedjuhlar {
234
235			public:
236			// only 10 types for now
237			private:
238			vector <list<event_cb> > event_lists;
239
240			public:
241			skedjuhlar () {
242			event_lists.resize (MAX_EVENT_TYPES, list<event_cb>());
243			}
244
245			void register_event_cb (const event_type &t, const event_cb &e) {
246			event_lists[t].push_back (e);
247			};
248			void send_event (event &e) {
249			list<event_cb> &l = event_lists[e.type];
250			for (list<event_cb>::iterator it = l.begin (); it != l.end (); it++) {
251			(*it)(e);
252			}
253			};
254			void check_events () {
255			while (!events.empty ()) {
256			event &e = events.pop_front ();
257			list<event_cb> &l = event_lists[e->name];
258			for (list<event_cb>::iterator it = l.begin (); it !+ l.end (); it++) {
259			(*it)(e);
260			}
261			delete e; // ugly slow? hai hai..... 183G
262			}
263			}
264			};
265
266			extern skedjuhlar main_scheduler;
267	root	1.13	*/
268	root	1.22
269	root	1.31	namespace gl {
270			void draw_box (const view &ctx, const sector &a, const sector &b);
271	root	1.34
272	root	1.35	extern int nesting;
273	root	1.34	void errchk (const char name, const char args, const char *file, int line);
274	root	1.31	}
275
276	root	1.22	GLuint SDL_GL_LoadTexture (SDL_Surface * surface, GLfloat * texcoord);
277	root	1.27
278	root	1.22	inline int power_of_two (int input)
279			{
280			int value = 1;
281
282			while (value < input)
283			{
284			value <<= 1;
285			}
286			return value;
287			}
288
289			struct TextureExecption {
290	root	1.27	TextureExecption (string s) : msg(s) { }
291			string msg;
292	root	1.22	};
293	root	1.27
294	root	1.22	struct Texture {
295	root	1.27	SDL_Surface *image;
296			GLuint texture;
297			GLfloat texcoord[4];
298
299			public:
300
301			Texture(const char *f)
302			{
303			image = IMG_Load (f);
304
305			if (!image)
306			throw (TextureExecption ("Couldn't load " + (string) f + ": " + (string) IMG_GetError ()));
307	root	1.22
308	root	1.27	texture = SDL_GL_LoadTexture (image, (GLfloat*)&texcoord);
309			if (texture == 0)
310			throw (TextureExecption ("Couldn't make GL Texture, failed to create new RGB SWSurface"));
311			}
312	root	1.22	};
313	root	1.1
314			#endif
315