libgender/util.h

#ifndef UTIL_H
#define UTIL_H

#include <cmath>
#include <cfloat>
#include <cstdlib>
#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 63
#define SOFFS_MIN (soffs)-(1LL << (OFFS_BITS - 2))
#define SOFFS_MAX (soffs)+(1LL << (OFFS_BITS - 2))
#define MAXEXTENT (1ULL << (OFFS_BITS - 1))

#define ABS(n) ((n) < 0 ? -(n) : (n))

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 norm (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_bbox (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);

#endif

Revision:	1.39
Committed:	Mon Oct 11 00:05:48 2004 UTC (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.38:	+7 -4 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	1.39	#include <cstdlib>
7	root	1.1	#include <vector>
8	root	1.22	#include <string>
9	root	1.1
10	root	1.37	#include "opengl.h"
11	root	1.18
12	root	1.37	#include <SDL/SDL_image.h>
13	root	1.30
14	root	1.1	using namespace std;
15	root	1.18
16			extern CGcontext cgc;
17			extern CGprogram vsh;
18			extern CGprogram fsh;
19	root	1.19	extern CGparameter mv, mvp, lightpos;
20	root	1.21	extern CGprofile vsh_profile, fsh_profile;
21	root	1.1
22	root	1.36	typedef long long soffs; // 32 bit
23			typedef unsigned long long uoffs;
24	root	1.39	#define OFFS_BITS 63
25	root	1.36	#define SOFFS_MIN (soffs)-(1LL << (OFFS_BITS - 2))
26			#define SOFFS_MAX (soffs)+(1LL << (OFFS_BITS - 2))
27			#define MAXEXTENT (1ULL << (OFFS_BITS - 1))
28	root	1.1
29	root	1.39	#define ABS(n) ((n) < 0 ? -(n) : (n))
30
31	root	1.37	struct sector
32			{
33	root	1.32	soffs x, y, z;
34
35			sector (soffs x, soffs y, soffs z) : x(x), y(y), z(z) { };
36			sector (soffs xyz = 0) : x(xyz), y(xyz), z(xyz) { };
37
38			void offset (int subindex, uoffs extent)
39			{
40			if (subindex & 1) x += extent;
41			if (subindex & 2) y += extent;
42			if (subindex & 4) z += extent;
43			}
44			};
45
46			inline sector operator +(const sector &a, const sector &b)
47			{
48			return sector (a.x + b.x, a.y + b.y, a.z + b.z);
49			}
50
51			inline sector operator -(const sector &a, const sector &b)
52			{
53			return sector (a.x - b.x, a.y - b.y, a.z - b.z);
54			}
55
56			inline sector operator /(const sector &a, soffs b)
57			{
58			return sector (a.x / b, a.y / b, a.z / b);
59			}
60
61			inline bool operator <=(const sector &a, const sector &b)
62			{
63			return a.x <= b.x && a.y <= b.y && a.z <= b.z;
64			}
65
66			inline soffs max (const sector &a)
67			{
68			return max (a.x, max (a.y, a.z));
69			}
70
71			inline sector translate (const sector &p, const sector &src, const sector &dst)
72			{
73			return p + (dst - src);
74			}
75
76			inline sector abs (const sector &s)
77			{
78	root	1.39	return sector (ABS (s.x), ABS (s.y), ABS (s.z));
79	root	1.32	}
80	root	1.1
81	root	1.37	struct vec3
82			{
83	root	1.1	GLfloat x, y, z;
84			vec3 () { };
85	root	1.32	vec3 (GLfloat s) : x(s), y(s), z(s) { };
86	root	1.1	vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
87	root	1.32	vec3 (const sector &s) : x(s.x), y(s.y), z(s.z) { };
88	root	1.1
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	root	1.6
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	root	1.27	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	root	1.6	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	root	1.39	inline const GLfloat norm (const vec3 &v)
117	root	1.6	{
118			return sqrtf (dot (v, v));
119			}
120	root	1.1
121	root	1.37	struct matrix
122			{
123	root	1.5	GLfloat data[4][4];
124
125	root	1.12	const GLfloat operator ()(int i, int j) const { return data[j][i]; };
126			GLfloat &operator ()(int i, int j) { return data[j][i]; };
127	root	1.5
128	root	1.33	operator GLfloat *() { return &data[0][0]; }
129
130	root	1.5	void diagonal (GLfloat v);
131	root	1.32	void clear () { diagonal (0.F); };
132			void identity () { diagonal (1.F); };
133	root	1.5
134			void print (); // ugly
135
136	root	1.16	static const matrix translation (const vec3 &v);
137			static const matrix rotation (GLfloat degrees, const vec3 &axis);
138	root	1.5
139	root	1.16	matrix () { };
140			matrix (GLfloat diag) { diagonal (diag); };
141	root	1.5	};
142
143	root	1.16	const matrix operator *(const matrix &a, const matrix &b);
144			const vec3 operator *(const matrix &a, const vec3 &v);
145	root	1.10
146			typedef vec3 point;
147
148			// a generic plane
149	root	1.37	struct plane
150			{
151	root	1.10	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	root	1.37	struct colour
166			{
167	root	1.10	GLfloat r, g, b, a;
168			colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.) : r(r), g(g), b(b), a(a) { };
169			};
170	root	1.5
171	root	1.37	struct texc
172			{
173	root	1.1	GLfloat s, t;
174			texc () { };
175			texc (GLfloat s, GLfloat t) : s(s), t(t) { };
176			};
177
178	root	1.37	struct box
179			{
180	root	1.27	point a, b;
181	root	1.8
182			box() { };
183	root	1.1
184			void reset ()
185			{
186	root	1.27	a = point ( FLT_MAX, FLT_MAX, FLT_MAX);
187			b = point (-FLT_MAX, -FLT_MAX, -FLT_MAX);
188	root	1.1	}
189
190			void add (const box &o);
191			void add (const point &p);
192			};
193	root	1.5
194	root	1.27	struct entity;
195			struct geometry;
196	root	1.20	struct view;
197	root	1.32	struct octant;
198	root	1.7
199	root	1.37	extern struct timer
200			{
201	root	1.7	static double now;
202			static double diff;
203
204			static void frame ();
205			timer ();
206			} timer;
207	root	1.11
208	root	1.13	/*
209	root	1.11	#define MAX_EVENT_TYPES 10
210			enum event_type { TIMER_EV };
211	root	1.37	struct event
212			{
213	root	1.11	event_type type;
214			};
215
216			typedef callback1<void, event&> event_cb;
217
218	root	1.37	class skedjuhlar
219			{
220	root	1.11	public:
221			// only 10 types for now
222			private:
223			vector <list<event_cb> > event_lists;
224
225			public:
226			skedjuhlar () {
227			event_lists.resize (MAX_EVENT_TYPES, list<event_cb>());
228			}
229
230			void register_event_cb (const event_type &t, const event_cb &e) {
231			event_lists[t].push_back (e);
232			};
233			void send_event (event &e) {
234			list<event_cb> &l = event_lists[e.type];
235			for (list<event_cb>::iterator it = l.begin (); it != l.end (); it++) {
236			(*it)(e);
237			}
238			};
239			void check_events () {
240			while (!events.empty ()) {
241			event &e = events.pop_front ();
242			list<event_cb> &l = event_lists[e->name];
243			for (list<event_cb>::iterator it = l.begin (); it !+ l.end (); it++) {
244			(*it)(e);
245			}
246			delete e; // ugly slow? hai hai..... 183G
247			}
248			}
249			};
250
251			extern skedjuhlar main_scheduler;
252	root	1.13	*/
253	root	1.22
254	root	1.37	namespace gl
255			{
256	root	1.39	void draw_bbox (const view &ctx, const sector &a, const sector &b);
257	root	1.34
258	root	1.35	extern int nesting;
259	root	1.34	void errchk (const char name, const char args, const char *file, int line);
260	root	1.31	}
261
262	root	1.22	GLuint SDL_GL_LoadTexture (SDL_Surface * surface, GLfloat * texcoord);
263	root	1.27
264	root	1.1	#endif
265