libgender/util.h

#ifndef UTIL_H
#define UTIL_H

#include <cmath>
#include <cfloat>
#include <vector>
#include <string>

#include "opengl.h"

#include <SDL/SDL_image.h>

using namespace std;

extern CGcontext cgc;
extern CGprogram vsh;
extern CGprogram fsh;
extern CGparameter mv, mvp, lightpos;
extern CGprofile vsh_profile, fsh_profile;

typedef long long soffs; // 32 bit
typedef unsigned long long uoffs;
#define OFFS_BITS 31
#define SOFFS_MIN (soffs)-(1LL << (OFFS_BITS - 2))
#define SOFFS_MAX (soffs)+(1LL << (OFFS_BITS - 2))
#define MAXEXTENT (1ULL << (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 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:	1.37
Committed:	Sun Oct 10 14:15:16 2004 UTC (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.36:	+28 -41 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#ifndef UTIL_H
2			#define UTIL_H
3
4	root	1.7	#include <cmath>
5	root	1.27	#include <cfloat>
6	root	1.1	#include <vector>
7	root	1.22	#include <string>
8	root	1.1
9	root	1.37	#include "opengl.h"
10	root	1.18
11	root	1.37	#include <SDL/SDL_image.h>
12	root	1.30
13	root	1.1	using namespace std;
14	root	1.18
15			extern CGcontext cgc;
16			extern CGprogram vsh;
17			extern CGprogram fsh;
18	root	1.19	extern CGparameter mv, mvp, lightpos;
19	root	1.21	extern CGprofile vsh_profile, fsh_profile;
20	root	1.1
21	root	1.36	typedef long long soffs; // 32 bit
22			typedef unsigned long long uoffs;
23	root	1.4	#define OFFS_BITS 31
24	root	1.36	#define SOFFS_MIN (soffs)-(1LL << (OFFS_BITS - 2))
25			#define SOFFS_MAX (soffs)+(1LL << (OFFS_BITS - 2))
26			#define MAXEXTENT (1ULL << (OFFS_BITS - 1))
27	root	1.1
28	root	1.37	struct sector
29			{
30	root	1.32	soffs x, y, z;
31
32			sector (soffs x, soffs y, soffs z) : x(x), y(y), z(z) { };
33			sector (soffs xyz = 0) : x(xyz), y(xyz), z(xyz) { };
34
35			void offset (int subindex, uoffs extent)
36			{
37			if (subindex & 1) x += extent;
38			if (subindex & 2) y += extent;
39			if (subindex & 4) z += extent;
40			}
41			};
42
43			inline sector operator +(const sector &a, const sector &b)
44			{
45			return sector (a.x + b.x, a.y + b.y, a.z + b.z);
46			}
47
48			inline sector operator -(const sector &a, const sector &b)
49			{
50			return sector (a.x - b.x, a.y - b.y, a.z - b.z);
51			}
52
53			inline sector operator /(const sector &a, soffs b)
54			{
55			return sector (a.x / b, a.y / b, a.z / b);
56			}
57
58			inline bool operator <=(const sector &a, const sector &b)
59			{
60			return a.x <= b.x && a.y <= b.y && a.z <= b.z;
61			}
62
63			inline soffs max (const sector &a)
64			{
65			return max (a.x, max (a.y, a.z));
66			}
67
68			inline sector translate (const sector &p, const sector &src, const sector &dst)
69			{
70			return p + (dst - src);
71			}
72
73			inline sector abs (const sector &s)
74			{
75			return sector (abs (s.x), abs (s.y), abs (s.z));
76			}
77	root	1.1
78	root	1.37	struct vec3
79			{
80	root	1.1	GLfloat x, y, z;
81			vec3 () { };
82	root	1.32	vec3 (GLfloat s) : x(s), y(s), z(s) { };
83	root	1.1	vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
84	root	1.32	vec3 (const sector &s) : x(s.x), y(s.y), z(s.z) { };
85	root	1.1
86			const vec3 operator -() const
87			{ return vec3 (-x, -y, -z); }
88			};
89
90			const vec3 normalize (const vec3 &v);
91			const vec3 cross (const vec3 &a, const vec3 &b);
92	root	1.6
93			inline const vec3 operator *(const vec3 &a, GLfloat s)
94			{
95			return vec3 (a.x * s, a.y * s, a.z * s);
96			}
97
98	root	1.27	inline const vec3 operator +(const vec3 &a, const vec3 &b)
99			{
100			return vec3 (a.x + b.x, a.y + b.y, a.z + b.z);
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	root	1.6	inline GLfloat dot (const vec3 &a, const vec3 &b)
109			{
110			return a.x * b.x + a.y * b.y + a.z * b.z;
111			}
112
113			inline const GLfloat abs (const vec3 &v)
114			{
115			return sqrtf (dot (v, v));
116			}
117	root	1.1
118	root	1.37	struct matrix
119			{
120	root	1.5	GLfloat data[4][4];
121
122	root	1.12	const GLfloat operator ()(int i, int j) const { return data[j][i]; };
123			GLfloat &operator ()(int i, int j) { return data[j][i]; };
124	root	1.5
125	root	1.33	operator GLfloat *() { return &data[0][0]; }
126
127	root	1.5	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	1.37	struct plane
147			{
148	root	1.10	vec3 n;
149			GLfloat d;
150
151			GLfloat distance (const point &p) const
152			{
153			return dot (n, p) + d;
154			}
155
156			plane () { };
157			plane (GLfloat a, GLfloat b, GLfloat c, GLfloat d);
158			};
159
160			void renormalize (sector &s, point &p);
161
162	root	1.37	struct colour
163			{
164	root	1.10	GLfloat r, g, b, a;
165			colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.) : r(r), g(g), b(b), a(a) { };
166			};
167	root	1.5
168	root	1.37	struct texc
169			{
170	root	1.1	GLfloat s, t;
171			texc () { };
172			texc (GLfloat s, GLfloat t) : s(s), t(t) { };
173			};
174
175	root	1.37	struct box
176			{
177	root	1.27	point a, b;
178	root	1.8
179			box() { };
180	root	1.1
181			void reset ()
182			{
183	root	1.27	a = point ( FLT_MAX, FLT_MAX, FLT_MAX);
184			b = point (-FLT_MAX, -FLT_MAX, -FLT_MAX);
185	root	1.1	}
186
187			void add (const box &o);
188			void add (const point &p);
189			};
190	root	1.5
191	root	1.27	struct entity;
192			struct geometry;
193	root	1.20	struct view;
194	root	1.32	struct octant;
195	root	1.7
196	root	1.37	extern struct timer
197			{
198	root	1.7	static double now;
199			static double diff;
200
201			static void frame ();
202			timer ();
203			} timer;
204	root	1.11
205	root	1.13	/*
206	root	1.11	#define MAX_EVENT_TYPES 10
207			enum event_type { TIMER_EV };
208	root	1.37	struct event
209			{
210	root	1.11	event_type type;
211			};
212
213			typedef callback1<void, event&> event_cb;
214
215	root	1.37	class skedjuhlar
216			{
217	root	1.11	public:
218			// only 10 types for now
219			private:
220			vector <list<event_cb> > event_lists;
221
222			public:
223			skedjuhlar () {
224			event_lists.resize (MAX_EVENT_TYPES, list<event_cb>());
225			}
226
227			void register_event_cb (const event_type &t, const event_cb &e) {
228			event_lists[t].push_back (e);
229			};
230			void send_event (event &e) {
231			list<event_cb> &l = event_lists[e.type];
232			for (list<event_cb>::iterator it = l.begin (); it != l.end (); it++) {
233			(*it)(e);
234			}
235			};
236			void check_events () {
237			while (!events.empty ()) {
238			event &e = events.pop_front ();
239			list<event_cb> &l = event_lists[e->name];
240			for (list<event_cb>::iterator it = l.begin (); it !+ l.end (); it++) {
241			(*it)(e);
242			}
243			delete e; // ugly slow? hai hai..... 183G
244			}
245			}
246			};
247
248			extern skedjuhlar main_scheduler;
249	root	1.13	*/
250	root	1.22
251	root	1.37	namespace gl
252			{
253	root	1.31	void draw_box (const view &ctx, const sector &a, const sector &b);
254	root	1.34
255	root	1.35	extern int nesting;
256	root	1.34	void errchk (const char name, const char args, const char *file, int line);
257	root	1.31	}
258
259	root	1.22	GLuint SDL_GL_LoadTexture (SDL_Surface * surface, GLfloat * texcoord);
260	root	1.27
261	root	1.22	inline int power_of_two (int input)
262			{
263			int value = 1;
264
265			while (value < input)
266			{
267			value <<= 1;
268			}
269			return value;
270			}
271
272	root	1.37	struct TextureExecption
273			{
274	root	1.27	TextureExecption (string s) : msg(s) { }
275			string msg;
276	root	1.22	};
277	root	1.27
278	root	1.37	struct Texture
279			{
280	root	1.27	SDL_Surface *image;
281			GLuint texture;
282			GLfloat texcoord[4];
283
284			public:
285
286			Texture(const char *f)
287			{
288			image = IMG_Load (f);
289
290			if (!image)
291			throw (TextureExecption ("Couldn't load " + (string) f + ": " + (string) IMG_GetError ()));
292	root	1.22
293	root	1.27	texture = SDL_GL_LoadTexture (image, (GLfloat*)&texcoord);
294			if (texture == 0)
295			throw (TextureExecption ("Couldn't make GL Texture, failed to create new RGB SWSurface"));
296			}
297	root	1.22	};
298	root	1.1
299			#endif
300