libgender/util.h

#ifndef UTIL_H
#define UTIL_H

#include <cmath>
#include <vector>

using namespace std;

#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 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 = 0, soffs y = 0, soffs z = 0) : x(x), y(y), z(z) { };

  void offset (int subindex, uoffs extent)
  {
    if (subindex & 1) x += extent;
    if (subindex & 2) y += extent;
    if (subindex & 4) z += extent;
  }
};

inline const sector translate (const sector &p, const sector &src, const sector &dst)
{
  sector r;

  r.x = p.x + (dst.x - src.x);
  r.y = p.y + (dst.y - src.y);
  r.z = p.z + (dst.z - src.z);

  return r;
}

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 {
  sector a, b;

  box() { };

  void reset ()
  {
    a = sector (SOFFS_MAX, SOFFS_MAX, SOFFS_MAX);
    b = sector (SOFFS_MIN, SOFFS_MIN, SOFFS_MIN);
  }

  void add (const box &o);
  void add (const sector &p);
  void add (const point &p);
};

inline const box translate (const box &b, const sector &src, const sector &dst)
{
  box r;

  r.a = translate (b.a, src, dst);
  r.b = translate (b.b, src, dst);

  return r;
}

struct light {
  point p;
  colour c;
  GLfloat intensity;
  GLfloat radius;
};

struct material {
  colour diffuse, specular, emission;
  GLfloat shininess;
};

struct entity_base;
struct draw_context;

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;
*/

#endif

Revision:	1.17
Committed:	Tue Oct 5 06:03:16 2004 UTC (21 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.16:	+0 -20 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	1.1	#include <vector>
6
7			using namespace std;
8
9	root	1.7	#include <GL/gl.h>
10
11	root	1.3	typedef int soffs; // 32 bit
12			typedef unsigned int uoffs;
13	root	1.4	#define OFFS_BITS 31
14	root	1.9	#define SOFFS_MIN (soffs)-(1 << (OFFS_BITS - 2))
15			#define SOFFS_MAX (soffs)+(1 << (OFFS_BITS - 2))
16			#define MAXEXTENT (1UL << (OFFS_BITS - 1))
17	root	1.1
18			#define GLFLOAT_MAX 1e30
19			#define GLFLOAT_MIN -1e30
20
21			struct vec3 {
22			GLfloat x, y, z;
23			vec3 () { };
24			vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
25
26			const vec3 operator -() const
27			{ return vec3 (-x, -y, -z); }
28			};
29
30			const vec3 normalize (const vec3 &v);
31			const vec3 cross (const vec3 &a, const vec3 &b);
32	root	1.6
33			inline const vec3 operator *(const vec3 &a, GLfloat s)
34			{
35			return vec3 (a.x * s, a.y * s, a.z * s);
36			}
37
38			inline GLfloat dot (const vec3 &a, const vec3 &b)
39			{
40			return a.x * b.x + a.y * b.y + a.z * b.z;
41			}
42
43			inline const GLfloat abs (const vec3 &v)
44			{
45			return sqrtf (dot (v, v));
46			}
47	root	1.1
48	root	1.16	struct matrix {
49	root	1.5	GLfloat data[4][4];
50
51	root	1.12	const GLfloat operator ()(int i, int j) const { return data[j][i]; };
52			GLfloat &operator ()(int i, int j) { return data[j][i]; };
53	root	1.5
54			void diagonal (GLfloat v);
55			void clear () { diagonal (0.); };
56			void identity () { diagonal (1.); };
57
58			void print (); // ugly
59
60	root	1.16	static const matrix translation (const vec3 &v);
61			static const matrix rotation (GLfloat degrees, const vec3 &axis);
62	root	1.5
63	root	1.16	matrix () { };
64			matrix (GLfloat diag) { diagonal (diag); };
65	root	1.5	};
66
67	root	1.16	const matrix operator *(const matrix &a, const matrix &b);
68			const vec3 operator *(const matrix &a, const vec3 &v);
69	root	1.10
70			typedef vec3 point;
71
72			// a generic plane
73	root	1.12	struct plane {
74	root	1.10	vec3 n;
75			GLfloat d;
76
77			GLfloat distance (const point &p) const
78			{
79			return dot (n, p) + d;
80			}
81
82			plane () { };
83			plane (GLfloat a, GLfloat b, GLfloat c, GLfloat d);
84			};
85
86			struct sector {
87			soffs x, y, z;
88
89			sector (soffs x = 0, soffs y = 0, soffs z = 0) : x(x), y(y), z(z) { };
90
91			void offset (int subindex, uoffs extent)
92			{
93			if (subindex & 1) x += extent;
94			if (subindex & 2) y += extent;
95			if (subindex & 4) z += extent;
96			}
97			};
98
99			inline const sector translate (const sector &p, const sector &src, const sector &dst)
100			{
101			sector r;
102
103			r.x = p.x + (dst.x - src.x);
104			r.y = p.y + (dst.y - src.y);
105			r.z = p.z + (dst.z - src.z);
106
107			return r;
108			}
109
110			void renormalize (sector &s, point &p);
111
112			struct colour {
113			GLfloat r, g, b, a;
114			colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.) : r(r), g(g), b(b), a(a) { };
115			};
116	root	1.5
117	root	1.1	struct texc {
118			GLfloat s, t;
119			texc () { };
120			texc (GLfloat s, GLfloat t) : s(s), t(t) { };
121			};
122
123			struct box {
124	root	1.8	sector a, b;
125
126			box() { };
127	root	1.1
128			void reset ()
129			{
130	root	1.9	a = sector (SOFFS_MAX, SOFFS_MAX, SOFFS_MAX);
131			b = sector (SOFFS_MIN, SOFFS_MIN, SOFFS_MIN);
132	root	1.1	}
133
134			void add (const box &o);
135	root	1.8	void add (const sector &p);
136	root	1.1	void add (const point &p);
137			};
138	root	1.5
139			inline const box translate (const box &b, const sector &src, const sector &dst)
140			{
141			box r;
142
143			r.a = translate (b.a, src, dst);
144			r.b = translate (b.b, src, dst);
145
146			return r;
147			}
148	root	1.1
149			struct light {
150			point p;
151			colour c;
152			GLfloat intensity;
153			GLfloat radius;
154	root	1.2	};
155
156			struct material {
157			colour diffuse, specular, emission;
158			GLfloat shininess;
159	root	1.1	};
160
161	root	1.4	struct entity_base;
162			struct draw_context;
163	root	1.7
164			extern struct timer {
165			static double now;
166			static double diff;
167
168			static void frame ();
169			timer ();
170			} timer;
171	root	1.11
172	root	1.13	/*
173	root	1.11	#define MAX_EVENT_TYPES 10
174			enum event_type { TIMER_EV };
175			struct event {
176			event_type type;
177			};
178
179			typedef callback1<void, event&> event_cb;
180
181			class skedjuhlar {
182
183			public:
184			// only 10 types for now
185			private:
186			vector <list<event_cb> > event_lists;
187
188			public:
189			skedjuhlar () {
190			event_lists.resize (MAX_EVENT_TYPES, list<event_cb>());
191			}
192
193			void register_event_cb (const event_type &t, const event_cb &e) {
194			event_lists[t].push_back (e);
195			};
196			void send_event (event &e) {
197			list<event_cb> &l = event_lists[e.type];
198			for (list<event_cb>::iterator it = l.begin (); it != l.end (); it++) {
199			(*it)(e);
200			}
201			};
202			void check_events () {
203			while (!events.empty ()) {
204			event &e = events.pop_front ();
205			list<event_cb> &l = event_lists[e->name];
206			for (list<event_cb>::iterator it = l.begin (); it !+ l.end (); it++) {
207			(*it)(e);
208			}
209			delete e; // ugly slow? hai hai..... 183G
210			}
211			}
212			};
213
214			extern skedjuhlar main_scheduler;
215	root	1.13	*/
216	root	1.1
217			#endif
218