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))

#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:	1.30
Committed:	Fri Oct 8 16:52:49 2004 UTC (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.29:	+2 -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	#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	using namespace std;
17
18	extern CGcontext cgc;
19	extern CGprogram vsh;
20	extern CGprogram fsh;
21	extern CGparameter mv, mvp, lightpos;
22	extern CGprofile vsh_profile, fsh_profile;
23
24	#include <GL/gl.h>
25
26	typedef int soffs; // 32 bit
27	typedef unsigned int uoffs;
28	#define OFFS_BITS 31
29	#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
33	#define GLFLOAT_MAX 1e30
34	#define GLFLOAT_MIN -1e30
35
36	struct vec3 {
37	GLfloat x, y, z;
38	vec3 () { };
39	vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
40
41	const vec3 operator -() const
42	{ return vec3 (-x, -y, -z); }
43	};
44
45	const vec3 normalize (const vec3 &v);
46	const vec3 cross (const vec3 &a, const vec3 &b);
47
48	inline const vec3 operator *(const vec3 &a, GLfloat s)
49	{
50	return vec3 (a.x * s, a.y * s, a.z * s);
51	}
52
53	inline const vec3 operator +(const vec3 &a, const vec3 &b)
54	{
55	return vec3 (a.x + b.x, a.y + b.y, a.z + b.z);
56	}
57
58	inline const vec3 operator -(const vec3 &a, const vec3 &b)
59	{
60	return vec3 (a.x - b.x, a.y - b.y, a.z - b.z);
61	}
62
63	inline GLfloat dot (const vec3 &a, const vec3 &b)
64	{
65	return a.x * b.x + a.y * b.y + a.z * b.z;
66	}
67
68	inline const GLfloat abs (const vec3 &v)
69	{
70	return sqrtf (dot (v, v));
71	}
72
73	struct matrix {
74	GLfloat data[4][4];
75
76	const GLfloat operator ()(int i, int j) const { return data[j][i]; };
77	GLfloat &operator ()(int i, int j) { return data[j][i]; };
78
79	void diagonal (GLfloat v);
80	void clear () { diagonal (0.); };
81	void identity () { diagonal (1.); };
82
83	void print (); // ugly
84
85	static const matrix translation (const vec3 &v);
86	static const matrix rotation (GLfloat degrees, const vec3 &axis);
87
88	matrix () { };
89	matrix (GLfloat diag) { diagonal (diag); };
90	};
91
92	const matrix operator *(const matrix &a, const matrix &b);
93	const vec3 operator *(const matrix &a, const vec3 &v);
94
95	typedef vec3 point;
96
97	// a generic plane
98	struct plane {
99	vec3 n;
100	GLfloat d;
101
102	GLfloat distance (const point &p) const
103	{
104	return dot (n, p) + d;
105	}
106
107	plane () { };
108	plane (GLfloat a, GLfloat b, GLfloat c, GLfloat d);
109	};
110
111	struct sector {
112	soffs x, y, z;
113
114	sector (soffs x, soffs y, soffs z) : x(x), y(y), z(z) { };
115	sector (soffs xyz = 0) : x(xyz), y(xyz), z(xyz) { };
116
117	void offset (int subindex, uoffs extent)
118	{
119	if (subindex & 1) x += extent;
120	if (subindex & 2) y += extent;
121	if (subindex & 4) z += extent;
122	}
123	};
124
125	inline sector operator +(const sector &a, const sector &b)
126	{
127	return sector (a.x + b.x, a.y + b.y, a.z + b.z);
128	}
129
130	inline sector operator -(const sector &a, const sector &b)
131	{
132	return sector (a.x - b.x, a.y - b.y, a.z - b.z);
133	}
134
135	inline sector operator /(const sector &a, soffs b)
136	{
137	return sector (a.x / b, a.y / b, a.z / b);
138	}
139
140	inline bool operator <=(const sector &a, const sector &b)
141	{
142	return a.x <= b.x && a.y <= b.y && a.z <= b.z;
143	}
144
145	inline soffs max (const sector &a)
146	{
147	return max (a.x, max (a.y, a.z));
148	}
149
150	inline sector translate (const sector &p, const sector &src, const sector &dst)
151	{
152	return p + (dst - src);
153	}
154
155	inline sector abs (const sector &s)
156	{
157	return sector (abs (s.x), abs (s.y), abs (s.z));
158	}
159
160	void renormalize (sector &s, point &p);
161
162	struct colour {
163	GLfloat r, g, b, a;
164	colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.) : r(r), g(g), b(b), a(a) { };
165	};
166
167	struct texc {
168	GLfloat s, t;
169	texc () { };
170	texc (GLfloat s, GLfloat t) : s(s), t(t) { };
171	};
172
173	struct box {
174	point a, b;
175
176	box() { };
177
178	void reset ()
179	{
180	a = point ( FLT_MAX, FLT_MAX, FLT_MAX);
181	b = point (-FLT_MAX, -FLT_MAX, -FLT_MAX);
182	}
183
184	void add (const box &o);
185	void add (const point &p);
186	};
187
188	struct light {
189	point p;
190	colour c;
191	GLfloat intensity;
192	GLfloat radius;
193	};
194
195	struct material {
196	colour diffuse, specular, emission;
197	GLfloat shininess;
198
199	material ()
200	{
201	diffuse = colour (1, 0, 1, 1);
202	specular = colour (1, 0, 1, 1);
203	emission = colour (1, 0, 1, 1);
204	shininess = 1;
205	}
206	};
207
208	struct entity;
209	struct geometry;
210	struct view;
211
212	extern struct timer {
213	static double now;
214	static double diff;
215
216	static void frame ();
217	timer ();
218	} timer;
219
220	/*
221	#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	*/
264
265	GLuint SDL_GL_LoadTexture (SDL_Surface * surface, GLfloat * texcoord);
266
267	inline int power_of_two (int input)
268	{
269	int value = 1;
270
271	while (value < input)
272	{
273	value <<= 1;
274	}
275	return value;
276	}
277
278	struct TextureExecption {
279	TextureExecption (string s) : msg(s) { }
280	string msg;
281	};
282
283	struct Texture {
284	SDL_Surface *image;
285	GLuint texture;
286	GLfloat texcoord[4];
287
288	public:
289
290	Texture(const char *f)
291	{
292	image = IMG_Load (f);
293
294	if (!image)
295	throw (TextureExecption ("Couldn't load " + (string) f + ": " + (string) IMG_GetError ()));
296
297	texture = SDL_GL_LoadTexture (image, (GLfloat*)&texcoord);
298	if (texture == 0)
299	throw (TextureExecption ("Couldn't make GL Texture, failed to create new RGB SWSurface"));
300	}
301	};
302
303	#endif
304