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 (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.31:	+53 -53 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	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
82	struct vec3 {
83	GLfloat x, y, z;
84	vec3 () { };
85	vec3 (GLfloat s) : x(s), y(s), z(s) { };
86	vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
87	vec3 (const sector &s) : x(s.x), y(s.y), z(s.z) { };
88
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
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	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	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
121	struct matrix {
122	GLfloat data[4][4];
123
124	const GLfloat operator ()(int i, int j) const { return data[j][i]; };
125	GLfloat &operator ()(int i, int j) { return data[j][i]; };
126
127	void diagonal (GLfloat v);
128	void clear () { diagonal (0.F); };
129	void identity () { diagonal (1.F); };
130
131	void print (); // ugly
132
133	static const matrix translation (const vec3 &v);
134	static const matrix rotation (GLfloat degrees, const vec3 &axis);
135
136	matrix () { };
137	matrix (GLfloat diag) { diagonal (diag); };
138	};
139
140	const matrix operator *(const matrix &a, const matrix &b);
141	const vec3 operator *(const matrix &a, const vec3 &v);
142
143	typedef vec3 point;
144
145	// a generic plane
146	struct plane {
147	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
166	struct texc {
167	GLfloat s, t;
168	texc () { };
169	texc (GLfloat s, GLfloat t) : s(s), t(t) { };
170	};
171
172	struct box {
173	point a, b;
174
175	box() { };
176
177	void reset ()
178	{
179	a = point ( FLT_MAX, FLT_MAX, FLT_MAX);
180	b = point (-FLT_MAX, -FLT_MAX, -FLT_MAX);
181	}
182
183	void add (const box &o);
184	void add (const point &p);
185	};
186
187	struct light {
188	point p;
189	colour c;
190	GLfloat intensity;
191	GLfloat radius;
192	};
193
194	struct material {
195	colour diffuse, specular, emission;
196	GLfloat shininess;
197
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	};
206
207	struct entity;
208	struct geometry;
209	struct view;
210	struct octant;
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	namespace gl {
266	void draw_box (const view &ctx, const sector &a, const sector &b);
267	}
268
269	GLuint SDL_GL_LoadTexture (SDL_Surface * surface, GLfloat * texcoord);
270
271	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	TextureExecption (string s) : msg(s) { }
284	string msg;
285	};
286
287	struct Texture {
288	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
301	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	};
306
307	#endif
308