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 (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.34:	+1 -0 lines
Log Message:	* empty log message *
#	Content
1	#ifndef UTIL_H
2	#define UTIL_H
3
4	#include <SDL/SDL.h>
5	#include <SDL/SDL_image.h>
6	#include <cmath>
7	#include <cfloat>
8	#include <vector>
9	#include <string>
10
11	#include <Cg/cg.h>
12	#include <Cg/cgGL.h>
13
14	#include <GL/gl.h>
15	#include <GL/glext.h>
16	#include "gldebug.h"
17
18	using namespace std;
19
20	extern CGcontext cgc;
21	extern CGprogram vsh;
22	extern CGprogram fsh;
23	extern CGparameter mv, mvp, lightpos;
24	extern CGprofile vsh_profile, fsh_profile;
25
26	#include <GL/gl.h>
27
28	typedef int soffs; // 32 bit
29	typedef unsigned int uoffs;
30	#define OFFS_BITS 31
31	#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
35	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
84	struct vec3 {
85	GLfloat x, y, z;
86	vec3 () { };
87	vec3 (GLfloat s) : x(s), y(s), z(s) { };
88	vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
89	vec3 (const sector &s) : x(s.x), y(s.y), z(s.z) { };
90
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
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	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	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
123	struct matrix {
124	GLfloat data[4][4];
125
126	const GLfloat operator ()(int i, int j) const { return data[j][i]; };
127	GLfloat &operator ()(int i, int j) { return data[j][i]; };
128
129	operator GLfloat *() { return &data[0][0]; }
130
131	void diagonal (GLfloat v);
132	void clear () { diagonal (0.F); };
133	void identity () { diagonal (1.F); };
134
135	void print (); // ugly
136
137	static const matrix translation (const vec3 &v);
138	static const matrix rotation (GLfloat degrees, const vec3 &axis);
139
140	matrix () { };
141	matrix (GLfloat diag) { diagonal (diag); };
142	};
143
144	const matrix operator *(const matrix &a, const matrix &b);
145	const vec3 operator *(const matrix &a, const vec3 &v);
146
147	typedef vec3 point;
148
149	// a generic plane
150	struct plane {
151	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
170	struct texc {
171	GLfloat s, t;
172	texc () { };
173	texc (GLfloat s, GLfloat t) : s(s), t(t) { };
174	};
175
176	struct box {
177	point a, b;
178
179	box() { };
180
181	void reset ()
182	{
183	a = point ( FLT_MAX, FLT_MAX, FLT_MAX);
184	b = point (-FLT_MAX, -FLT_MAX, -FLT_MAX);
185	}
186
187	void add (const box &o);
188	void add (const point &p);
189	};
190
191	struct light {
192	point p;
193	colour c;
194	GLfloat intensity;
195	GLfloat radius;
196	};
197
198	struct material {
199	colour diffuse, specular, emission;
200	GLfloat shininess;
201
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	};
210
211	struct entity;
212	struct geometry;
213	struct view;
214	struct octant;
215
216	extern struct timer {
217	static double now;
218	static double diff;
219
220	static void frame ();
221	timer ();
222	} timer;
223
224	/*
225	#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	*/
268
269	namespace gl {
270	void draw_box (const view &ctx, const sector &a, const sector &b);
271
272	extern int nesting;
273	void errchk (const char name, const char args, const char *file, int line);
274	}
275
276	GLuint SDL_GL_LoadTexture (SDL_Surface * surface, GLfloat * texcoord);
277
278	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	TextureExecption (string s) : msg(s) { }
291	string msg;
292	};
293
294	struct Texture {
295	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
308	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	};
313
314	#endif
315