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 (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.16:	+0 -20 lines
Log Message:	* empty log message *
#	Content
1	#ifndef UTIL_H
2	#define UTIL_H
3
4	#include <cmath>
5	#include <vector>
6
7	using namespace std;
8
9	#include <GL/gl.h>
10
11	typedef int soffs; // 32 bit
12	typedef unsigned int uoffs;
13	#define OFFS_BITS 31
14	#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
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
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
48	struct matrix {
49	GLfloat data[4][4];
50
51	const GLfloat operator ()(int i, int j) const { return data[j][i]; };
52	GLfloat &operator ()(int i, int j) { return data[j][i]; };
53
54	void diagonal (GLfloat v);
55	void clear () { diagonal (0.); };
56	void identity () { diagonal (1.); };
57
58	void print (); // ugly
59
60	static const matrix translation (const vec3 &v);
61	static const matrix rotation (GLfloat degrees, const vec3 &axis);
62
63	matrix () { };
64	matrix (GLfloat diag) { diagonal (diag); };
65	};
66
67	const matrix operator *(const matrix &a, const matrix &b);
68	const vec3 operator *(const matrix &a, const vec3 &v);
69
70	typedef vec3 point;
71
72	// a generic plane
73	struct plane {
74	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
117	struct texc {
118	GLfloat s, t;
119	texc () { };
120	texc (GLfloat s, GLfloat t) : s(s), t(t) { };
121	};
122
123	struct box {
124	sector a, b;
125
126	box() { };
127
128	void reset ()
129	{
130	a = sector (SOFFS_MAX, SOFFS_MAX, SOFFS_MAX);
131	b = sector (SOFFS_MIN, SOFFS_MIN, SOFFS_MIN);
132	}
133
134	void add (const box &o);
135	void add (const sector &p);
136	void add (const point &p);
137	};
138
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
149	struct light {
150	point p;
151	colour c;
152	GLfloat intensity;
153	GLfloat radius;
154	};
155
156	struct material {
157	colour diffuse, specular, emission;
158	GLfloat shininess;
159	};
160
161	struct entity_base;
162	struct draw_context;
163
164	extern struct timer {
165	static double now;
166	static double diff;
167
168	static void frame ();
169	timer ();
170	} timer;
171
172	/*
173	#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	*/
216
217	#endif
218