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>

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 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:	1.28
Committed:	Fri Oct 8 09:45:25 2004 UTC (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.27:	+20 -4 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	using namespace std;
15
16	extern CGcontext cgc;
17	extern CGprogram vsh;
18	extern CGprogram fsh;
19	extern CGparameter mv, mvp, lightpos;
20	extern CGprofile vsh_profile, fsh_profile;
21
22	#include <GL/gl.h>
23
24	typedef int soffs; // 32 bit
25	typedef unsigned int uoffs;
26	#define OFFS_BITS 31
27	#define SOFFS_MIN (soffs)-(1 << (OFFS_BITS - 2))
28	#define SOFFS_MAX (soffs)+(1 << (OFFS_BITS - 2))
29	#define MAXEXTENT (1UL << (OFFS_BITS - 1))
30
31	#define GLFLOAT_MAX 1e30
32	#define GLFLOAT_MIN -1e30
33
34	struct vec3 {
35	GLfloat x, y, z;
36	vec3 () { };
37	vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
38
39	const vec3 operator -() const
40	{ return vec3 (-x, -y, -z); }
41	};
42
43	const vec3 normalize (const vec3 &v);
44	const vec3 cross (const vec3 &a, const vec3 &b);
45
46	inline const vec3 operator *(const vec3 &a, GLfloat s)
47	{
48	return vec3 (a.x * s, a.y * s, a.z * s);
49	}
50
51	inline const vec3 operator +(const vec3 &a, const vec3 &b)
52	{
53	return vec3 (a.x + b.x, a.y + b.y, a.z + b.z);
54	}
55
56	inline const vec3 operator -(const vec3 &a, const vec3 &b)
57	{
58	return vec3 (a.x - b.x, a.y - b.y, a.z - b.z);
59	}
60
61	inline GLfloat dot (const vec3 &a, const vec3 &b)
62	{
63	return a.x * b.x + a.y * b.y + a.z * b.z;
64	}
65
66	inline const GLfloat abs (const vec3 &v)
67	{
68	return sqrtf (dot (v, v));
69	}
70
71	struct matrix {
72	GLfloat data[4][4];
73
74	const GLfloat operator ()(int i, int j) const { return data[j][i]; };
75	GLfloat &operator ()(int i, int j) { return data[j][i]; };
76
77	void diagonal (GLfloat v);
78	void clear () { diagonal (0.); };
79	void identity () { diagonal (1.); };
80
81	void print (); // ugly
82
83	static const matrix translation (const vec3 &v);
84	static const matrix rotation (GLfloat degrees, const vec3 &axis);
85
86	matrix () { };
87	matrix (GLfloat diag) { diagonal (diag); };
88	};
89
90	const matrix operator *(const matrix &a, const matrix &b);
91	const vec3 operator *(const matrix &a, const vec3 &v);
92
93	typedef vec3 point;
94
95	// a generic plane
96	struct plane {
97	vec3 n;
98	GLfloat d;
99
100	GLfloat distance (const point &p) const
101	{
102	return dot (n, p) + d;
103	}
104
105	plane () { };
106	plane (GLfloat a, GLfloat b, GLfloat c, GLfloat d);
107	};
108
109	struct sector {
110	soffs x, y, z;
111
112	sector (soffs x, soffs y, soffs z) : x(x), y(y), z(z) { };
113	sector (soffs xyz = 0) : x(xyz), y(xyz), z(xyz) { };
114
115	void offset (int subindex, uoffs extent)
116	{
117	if (subindex & 1) x += extent;
118	if (subindex & 2) y += extent;
119	if (subindex & 4) z += extent;
120	}
121	};
122
123	inline sector operator +(const sector &a, const sector &b)
124	{
125	return sector (a.x + b.x, a.y + b.y, a.z + b.z);
126	}
127
128	inline sector operator -(const sector &a, const sector &b)
129	{
130	return sector (a.x - b.x, a.y - b.y, a.z - b.z);
131	}
132
133	inline sector operator /(const sector &a, soffs b)
134	{
135	return sector (a.x / b, a.y / b, a.z / b);
136	}
137
138	inline bool operator <=(const sector &a, const sector &b)
139	{
140	return a.x <= b.x && a.y <= b.y && a.z <= b.z;
141	}
142
143	inline sector translate (const sector &p, const sector &src, const sector &dst)
144	{
145	return p + (dst - src);
146	}
147
148	inline sector abs (const sector &s)
149	{
150	return sector (abs (s.x), abs (s.y), abs (s.z));
151	}
152
153	void renormalize (sector &s, point &p);
154
155	struct colour {
156	GLfloat r, g, b, a;
157	colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.) : r(r), g(g), b(b), a(a) { };
158	};
159
160	struct texc {
161	GLfloat s, t;
162	texc () { };
163	texc (GLfloat s, GLfloat t) : s(s), t(t) { };
164	};
165
166	struct box {
167	point a, b;
168
169	box() { };
170
171	void reset ()
172	{
173	a = point ( FLT_MAX, FLT_MAX, FLT_MAX);
174	b = point (-FLT_MAX, -FLT_MAX, -FLT_MAX);
175	}
176
177	void add (const box &o);
178	void add (const point &p);
179	};
180
181	struct light {
182	point p;
183	colour c;
184	GLfloat intensity;
185	GLfloat radius;
186	};
187
188	struct material {
189	colour diffuse, specular, emission;
190	GLfloat shininess;
191
192	material ()
193	{
194	diffuse = colour (1, 0, 1, 1);
195	specular = colour (1, 0, 1, 1);
196	emission = colour (1, 0, 1, 1);
197	shininess = 1;
198	}
199	};
200
201	struct entity;
202	struct geometry;
203	struct view;
204
205	extern struct timer {
206	static double now;
207	static double diff;
208
209	static void frame ();
210	timer ();
211	} timer;
212
213	/*
214	#define MAX_EVENT_TYPES 10
215	enum event_type { TIMER_EV };
216	struct event {
217	event_type type;
218	};
219
220	typedef callback1<void, event&> event_cb;
221
222	class skedjuhlar {
223
224	public:
225	// only 10 types for now
226	private:
227	vector <list<event_cb> > event_lists;
228
229	public:
230	skedjuhlar () {
231	event_lists.resize (MAX_EVENT_TYPES, list<event_cb>());
232	}
233
234	void register_event_cb (const event_type &t, const event_cb &e) {
235	event_lists[t].push_back (e);
236	};
237	void send_event (event &e) {
238	list<event_cb> &l = event_lists[e.type];
239	for (list<event_cb>::iterator it = l.begin (); it != l.end (); it++) {
240	(*it)(e);
241	}
242	};
243	void check_events () {
244	while (!events.empty ()) {
245	event &e = events.pop_front ();
246	list<event_cb> &l = event_lists[e->name];
247	for (list<event_cb>::iterator it = l.begin (); it !+ l.end (); it++) {
248	(*it)(e);
249	}
250	delete e; // ugly slow? hai hai..... 183G
251	}
252	}
253	};
254
255	extern skedjuhlar main_scheduler;
256	*/
257
258	GLuint SDL_GL_LoadTexture (SDL_Surface * surface, GLfloat * texcoord);
259
260	inline int power_of_two (int input)
261	{
262	int value = 1;
263
264	while (value < input)
265	{
266	value <<= 1;
267	}
268	return value;
269	}
270
271	struct TextureExecption {
272	TextureExecption (string s) : msg(s) { }
273	string msg;
274	};
275
276	struct Texture {
277	SDL_Surface *image;
278	GLuint texture;
279	GLfloat texcoord[4];
280
281	public:
282
283	Texture(const char *f)
284	{
285	image = IMG_Load (f);
286
287	if (!image)
288	throw (TextureExecption ("Couldn't load " + (string) f + ": " + (string) IMG_GetError ()));
289
290	texture = SDL_GL_LoadTexture (image, (GLfloat*)&texcoord);
291	if (texture == 0)
292	throw (TextureExecption ("Couldn't make GL Texture, failed to create new RGB SWSurface"));
293	}
294	};
295
296	#endif
297