libgender/util.h

#ifndef UTIL_H
#define UTIL_H

#include <SDL/SDL.h>
#include <SDL/SDL_image.h>
#include <cmath>
#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 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 = 0, soffs y = 0, soffs z = 0) : x(x), y(y), z(z) { };

  void offset (int subindex, uoffs extent)
  {
    if (subindex & 1) x += extent;
    if (subindex & 2) y += extent;
    if (subindex & 4) z += extent;
  }
};

inline const sector operator +(const sector &a, const sector &b)
{
  return sector (a.x + b.x, a.y + b.y, a.z + b.z);
}

inline const sector operator -(const sector &a, const sector &b)
{
  return sector (a.x - b.x, a.y - b.y, a.z - b.z);
}

inline const sector translate (const sector &p, const sector &src, const sector &dst)
{
  sector r;

  r.x = p.x + (dst.x - src.x);
  r.y = p.y + (dst.y - src.y);
  r.z = p.z + (dst.z - src.z);

  return r;
}

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 {
  sector a, b;

  box() { };

  void reset ()
  {
    a = sector (SOFFS_MAX, SOFFS_MAX, SOFFS_MAX);
    b = sector (SOFFS_MIN, SOFFS_MIN, SOFFS_MIN);
  }

  void add (const box &o);
  void add (const sector &p);
  void add (const point &p);
};

inline const box translate (const box &b, const sector &src, const sector &dst)
{
  box r;

  r.a = translate (b.a, src, dst);
  r.b = translate (b.b, src, dst);

  return r;
}

struct light {
  point p;
  colour c;
  GLfloat intensity;
  GLfloat radius;
};

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

struct entity_base;
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:
      void new_from_file (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:	1.23
Committed:	Wed Oct 6 07:45:20 2004 UTC (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.22:	+10 -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	1.1	#include <vector>
8	root	1.22	#include <string>
9	root	1.1
10	root	1.18	#include <Cg/cg.h>
11			#include <Cg/cgGL.h>
12
13	root	1.1	using namespace std;
14	root	1.18
15			extern CGcontext cgc;
16			extern CGprogram vsh;
17			extern CGprogram fsh;
18	root	1.19	extern CGparameter mv, mvp, lightpos;
19	root	1.21	extern CGprofile vsh_profile, fsh_profile;
20	root	1.1
21	root	1.7	#include <GL/gl.h>
22
23	root	1.3	typedef int soffs; // 32 bit
24			typedef unsigned int uoffs;
25	root	1.4	#define OFFS_BITS 31
26	root	1.9	#define SOFFS_MIN (soffs)-(1 << (OFFS_BITS - 2))
27			#define SOFFS_MAX (soffs)+(1 << (OFFS_BITS - 2))
28			#define MAXEXTENT (1UL << (OFFS_BITS - 1))
29	root	1.1
30			#define GLFLOAT_MAX 1e30
31			#define GLFLOAT_MIN -1e30
32
33			struct vec3 {
34			GLfloat x, y, z;
35			vec3 () { };
36			vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
37
38			const vec3 operator -() const
39			{ return vec3 (-x, -y, -z); }
40			};
41
42			const vec3 normalize (const vec3 &v);
43			const vec3 cross (const vec3 &a, const vec3 &b);
44	root	1.6
45			inline const vec3 operator *(const vec3 &a, GLfloat s)
46			{
47			return vec3 (a.x * s, a.y * s, a.z * s);
48			}
49
50			inline GLfloat dot (const vec3 &a, const vec3 &b)
51			{
52			return a.x * b.x + a.y * b.y + a.z * b.z;
53			}
54
55			inline const GLfloat abs (const vec3 &v)
56			{
57			return sqrtf (dot (v, v));
58			}
59	root	1.1
60	root	1.16	struct matrix {
61	root	1.5	GLfloat data[4][4];
62
63	root	1.12	const GLfloat operator ()(int i, int j) const { return data[j][i]; };
64			GLfloat &operator ()(int i, int j) { return data[j][i]; };
65	root	1.5
66			void diagonal (GLfloat v);
67			void clear () { diagonal (0.); };
68			void identity () { diagonal (1.); };
69
70			void print (); // ugly
71
72	root	1.16	static const matrix translation (const vec3 &v);
73			static const matrix rotation (GLfloat degrees, const vec3 &axis);
74	root	1.5
75	root	1.16	matrix () { };
76			matrix (GLfloat diag) { diagonal (diag); };
77	root	1.5	};
78
79	root	1.16	const matrix operator *(const matrix &a, const matrix &b);
80			const vec3 operator *(const matrix &a, const vec3 &v);
81	root	1.10
82			typedef vec3 point;
83
84			// a generic plane
85	root	1.12	struct plane {
86	root	1.10	vec3 n;
87			GLfloat d;
88
89			GLfloat distance (const point &p) const
90			{
91			return dot (n, p) + d;
92			}
93
94			plane () { };
95			plane (GLfloat a, GLfloat b, GLfloat c, GLfloat d);
96			};
97
98			struct sector {
99			soffs x, y, z;
100
101			sector (soffs x = 0, soffs y = 0, soffs z = 0) : x(x), y(y), z(z) { };
102
103			void offset (int subindex, uoffs extent)
104			{
105			if (subindex & 1) x += extent;
106			if (subindex & 2) y += extent;
107			if (subindex & 4) z += extent;
108			}
109			};
110
111	root	1.23	inline const sector operator +(const sector &a, const sector &b)
112			{
113			return sector (a.x + b.x, a.y + b.y, a.z + b.z);
114			}
115
116			inline const sector operator -(const sector &a, const sector &b)
117			{
118			return sector (a.x - b.x, a.y - b.y, a.z - b.z);
119			}
120
121	root	1.10	inline const sector translate (const sector &p, const sector &src, const sector &dst)
122			{
123			sector r;
124
125			r.x = p.x + (dst.x - src.x);
126			r.y = p.y + (dst.y - src.y);
127			r.z = p.z + (dst.z - src.z);
128
129			return r;
130			}
131
132			void renormalize (sector &s, point &p);
133
134			struct colour {
135			GLfloat r, g, b, a;
136			colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.) : r(r), g(g), b(b), a(a) { };
137			};
138	root	1.5
139	root	1.1	struct texc {
140			GLfloat s, t;
141			texc () { };
142			texc (GLfloat s, GLfloat t) : s(s), t(t) { };
143			};
144
145			struct box {
146	root	1.8	sector a, b;
147
148			box() { };
149	root	1.1
150			void reset ()
151			{
152	root	1.9	a = sector (SOFFS_MAX, SOFFS_MAX, SOFFS_MAX);
153			b = sector (SOFFS_MIN, SOFFS_MIN, SOFFS_MIN);
154	root	1.1	}
155
156			void add (const box &o);
157	root	1.8	void add (const sector &p);
158	root	1.1	void add (const point &p);
159			};
160	root	1.5
161			inline const box translate (const box &b, const sector &src, const sector &dst)
162			{
163			box r;
164
165			r.a = translate (b.a, src, dst);
166			r.b = translate (b.b, src, dst);
167
168			return r;
169			}
170	root	1.1
171			struct light {
172			point p;
173			colour c;
174			GLfloat intensity;
175			GLfloat radius;
176	root	1.2	};
177
178			struct material {
179			colour diffuse, specular, emission;
180			GLfloat shininess;
181	root	1.1	};
182
183	root	1.4	struct entity_base;
184	root	1.20	struct view;
185	root	1.7
186			extern struct timer {
187			static double now;
188			static double diff;
189
190			static void frame ();
191			timer ();
192			} timer;
193	root	1.11
194	root	1.13	/*
195	root	1.11	#define MAX_EVENT_TYPES 10
196			enum event_type { TIMER_EV };
197			struct event {
198			event_type type;
199			};
200
201			typedef callback1<void, event&> event_cb;
202
203			class skedjuhlar {
204
205			public:
206			// only 10 types for now
207			private:
208			vector <list<event_cb> > event_lists;
209
210			public:
211			skedjuhlar () {
212			event_lists.resize (MAX_EVENT_TYPES, list<event_cb>());
213			}
214
215			void register_event_cb (const event_type &t, const event_cb &e) {
216			event_lists[t].push_back (e);
217			};
218			void send_event (event &e) {
219			list<event_cb> &l = event_lists[e.type];
220			for (list<event_cb>::iterator it = l.begin (); it != l.end (); it++) {
221			(*it)(e);
222			}
223			};
224			void check_events () {
225			while (!events.empty ()) {
226			event &e = events.pop_front ();
227			list<event_cb> &l = event_lists[e->name];
228			for (list<event_cb>::iterator it = l.begin (); it !+ l.end (); it++) {
229			(*it)(e);
230			}
231			delete e; // ugly slow? hai hai..... 183G
232			}
233			}
234			};
235
236			extern skedjuhlar main_scheduler;
237	root	1.13	*/
238	root	1.22
239			GLuint SDL_GL_LoadTexture (SDL_Surface * surface, GLfloat * texcoord);
240			inline int power_of_two (int input)
241			{
242			int value = 1;
243
244			while (value < input)
245			{
246			value <<= 1;
247			}
248			return value;
249			}
250
251
252
253			struct TextureExecption {
254			TextureExecption(string s) : msg(s) {}
255			string msg;
256			};
257			struct Texture {
258			SDL_Surface *image;
259			GLuint texture;
260			GLfloat texcoord[4];
261
262			public:
263			void new_from_file (const char *f) {
264			image = IMG_Load(f);
265			if(!image)
266			throw (TextureExecption("Couldn't load " + (string) f + ": " + (string) IMG_GetError ()));
267			texture = SDL_GL_LoadTexture (image, (GLfloat*)&texcoord);
268			if (texture == 0)
269			throw (TextureExecption("Couldn't make GL Texture, failed to create new RGB SWSurface"));
270			}
271			};
272	root	1.1
273			#endif
274