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))

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]; };

  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);
}

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:	1.32
Committed:	Sat Oct 9 16:36:31 2004 UTC (21 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.31:	+53 -53 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	root	1.32	struct sector {
34			soffs x, y, z;
35
36			sector (soffs x, soffs y, soffs z) : x(x), y(y), z(z) { };
37			sector (soffs xyz = 0) : x(xyz), y(xyz), z(xyz) { };
38
39			void offset (int subindex, uoffs extent)
40			{
41			if (subindex & 1) x += extent;
42			if (subindex & 2) y += extent;
43			if (subindex & 4) z += extent;
44			}
45			};
46
47			inline sector operator +(const sector &a, const sector &b)
48			{
49			return sector (a.x + b.x, a.y + b.y, a.z + b.z);
50			}
51
52			inline sector operator -(const sector &a, const sector &b)
53			{
54			return sector (a.x - b.x, a.y - b.y, a.z - b.z);
55			}
56
57			inline sector operator /(const sector &a, soffs b)
58			{
59			return sector (a.x / b, a.y / b, a.z / b);
60			}
61
62			inline bool operator <=(const sector &a, const sector &b)
63			{
64			return a.x <= b.x && a.y <= b.y && a.z <= b.z;
65			}
66
67			inline soffs max (const sector &a)
68			{
69			return max (a.x, max (a.y, a.z));
70			}
71
72			inline sector translate (const sector &p, const sector &src, const sector &dst)
73			{
74			return p + (dst - src);
75			}
76
77			inline sector abs (const sector &s)
78			{
79			return sector (abs (s.x), abs (s.y), abs (s.z));
80			}
81	root	1.1
82			struct vec3 {
83			GLfloat x, y, z;
84			vec3 () { };
85	root	1.32	vec3 (GLfloat s) : x(s), y(s), z(s) { };
86	root	1.1	vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
87	root	1.32	vec3 (const sector &s) : x(s.x), y(s.y), z(s.z) { };
88	root	1.1
89			const vec3 operator -() const
90			{ return vec3 (-x, -y, -z); }
91			};
92
93			const vec3 normalize (const vec3 &v);
94			const vec3 cross (const vec3 &a, const vec3 &b);
95	root	1.6
96			inline const vec3 operator *(const vec3 &a, GLfloat s)
97			{
98			return vec3 (a.x * s, a.y * s, a.z * s);
99			}
100
101	root	1.27	inline const vec3 operator +(const vec3 &a, const vec3 &b)
102			{
103			return vec3 (a.x + b.x, a.y + b.y, a.z + b.z);
104			}
105
106			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	root	1.6	inline GLfloat dot (const vec3 &a, const vec3 &b)
112			{
113			return a.x * b.x + a.y * b.y + a.z * b.z;
114			}
115
116			inline const GLfloat abs (const vec3 &v)
117			{
118			return sqrtf (dot (v, v));
119			}
120	root	1.1
121	root	1.16	struct matrix {
122	root	1.5	GLfloat data[4][4];
123
124	root	1.12	const GLfloat operator ()(int i, int j) const { return data[j][i]; };
125			GLfloat &operator ()(int i, int j) { return data[j][i]; };
126	root	1.5
127			void diagonal (GLfloat v);
128	root	1.32	void clear () { diagonal (0.F); };
129			void identity () { diagonal (1.F); };
130	root	1.5
131			void print (); // ugly
132
133	root	1.16	static const matrix translation (const vec3 &v);
134			static const matrix rotation (GLfloat degrees, const vec3 &axis);
135	root	1.5
136	root	1.16	matrix () { };
137			matrix (GLfloat diag) { diagonal (diag); };
138	root	1.5	};
139
140	root	1.16	const matrix operator *(const matrix &a, const matrix &b);
141			const vec3 operator *(const matrix &a, const vec3 &v);
142	root	1.10
143			typedef vec3 point;
144
145			// a generic plane
146	root	1.12	struct plane {
147	root	1.10	vec3 n;
148			GLfloat d;
149
150			GLfloat distance (const point &p) const
151			{
152			return dot (n, p) + d;
153			}
154
155			plane () { };
156			plane (GLfloat a, GLfloat b, GLfloat c, GLfloat d);
157			};
158
159			void renormalize (sector &s, point &p);
160
161			struct colour {
162			GLfloat r, g, b, a;
163			colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.) : r(r), g(g), b(b), a(a) { };
164			};
165	root	1.5
166	root	1.1	struct texc {
167			GLfloat s, t;
168			texc () { };
169			texc (GLfloat s, GLfloat t) : s(s), t(t) { };
170			};
171
172			struct box {
173	root	1.27	point a, b;
174	root	1.8
175			box() { };
176	root	1.1
177			void reset ()
178			{
179	root	1.27	a = point ( FLT_MAX, FLT_MAX, FLT_MAX);
180			b = point (-FLT_MAX, -FLT_MAX, -FLT_MAX);
181	root	1.1	}
182
183			void add (const box &o);
184			void add (const point &p);
185			};
186	root	1.5
187	root	1.1	struct light {
188			point p;
189			colour c;
190			GLfloat intensity;
191			GLfloat radius;
192	root	1.2	};
193
194			struct material {
195			colour diffuse, specular, emission;
196			GLfloat shininess;
197	root	1.26
198			material ()
199			{
200			diffuse = colour (1, 0, 1, 1);
201			specular = colour (1, 0, 1, 1);
202			emission = colour (1, 0, 1, 1);
203			shininess = 1;
204			}
205	root	1.1	};
206
207	root	1.27	struct entity;
208			struct geometry;
209	root	1.20	struct view;
210	root	1.32	struct octant;
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	root	1.31	namespace gl {
266			void draw_box (const view &ctx, const sector &a, const sector &b);
267			}
268
269	root	1.22	GLuint SDL_GL_LoadTexture (SDL_Surface * surface, GLfloat * texcoord);
270	root	1.27
271	root	1.22	inline int power_of_two (int input)
272			{
273			int value = 1;
274
275			while (value < input)
276			{
277			value <<= 1;
278			}
279			return value;
280			}
281
282			struct TextureExecption {
283	root	1.27	TextureExecption (string s) : msg(s) { }
284			string msg;
285	root	1.22	};
286	root	1.27
287	root	1.22	struct Texture {
288	root	1.27	SDL_Surface *image;
289			GLuint texture;
290			GLfloat texcoord[4];
291
292			public:
293
294			Texture(const char *f)
295			{
296			image = IMG_Load (f);
297
298			if (!image)
299			throw (TextureExecption ("Couldn't load " + (string) f + ": " + (string) IMG_GetError ()));
300	root	1.22
301	root	1.27	texture = SDL_GL_LoadTexture (image, (GLfloat*)&texcoord);
302			if (texture == 0)
303			throw (TextureExecption ("Couldn't make GL Texture, failed to create new RGB SWSurface"));
304			}
305	root	1.22	};
306	root	1.1
307			#endif
308