libgender/util.h

#ifndef UTIL_H
#define UTIL_H

#include <cmath>
#include <vector>

using namespace std;

#include <GL/gl.h>

#include <sh/sh.hpp>

using namespace SH;

extern ShColor3f color;
extern ShPoint3f lightPos;
extern ShMatrix4x4f mvp;
extern ShProgram vsh, fsh;

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); };

  operator ShMatrix4x4f() const
  {
    ShMatrix4x4f r;

    for (int i = 0; i < 4; i++)
      for (int j = 0; j < 4 ; j++)
        r[i][j] = data[j][i];

    return r;
  }
};

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:	1.16
Committed:	Tue Oct 5 03:39:47 2004 UTC (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.15:	+18 -7 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	1.14	#include <sh/sh.hpp>
12
13			using namespace SH;
14
15			extern ShColor3f color;
16			extern ShPoint3f lightPos;
17	root	1.15	extern ShMatrix4x4f mvp;
18	root	1.14	extern ShProgram vsh, fsh;
19
20	root	1.3	typedef int soffs; // 32 bit
21			typedef unsigned int uoffs;
22	root	1.4	#define OFFS_BITS 31
23	root	1.9	#define SOFFS_MIN (soffs)-(1 << (OFFS_BITS - 2))
24			#define SOFFS_MAX (soffs)+(1 << (OFFS_BITS - 2))
25			#define MAXEXTENT (1UL << (OFFS_BITS - 1))
26	root	1.1
27			#define GLFLOAT_MAX 1e30
28			#define GLFLOAT_MIN -1e30
29
30			struct vec3 {
31			GLfloat x, y, z;
32			vec3 () { };
33			vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
34
35			const vec3 operator -() const
36			{ return vec3 (-x, -y, -z); }
37			};
38
39			const vec3 normalize (const vec3 &v);
40			const vec3 cross (const vec3 &a, const vec3 &b);
41	root	1.6
42			inline const vec3 operator *(const vec3 &a, GLfloat s)
43			{
44			return vec3 (a.x * s, a.y * s, a.z * s);
45			}
46
47			inline GLfloat dot (const vec3 &a, const vec3 &b)
48			{
49			return a.x * b.x + a.y * b.y + a.z * b.z;
50			}
51
52			inline const GLfloat abs (const vec3 &v)
53			{
54			return sqrtf (dot (v, v));
55			}
56	root	1.1
57	root	1.16	struct matrix {
58	root	1.5	GLfloat data[4][4];
59
60	root	1.12	const GLfloat operator ()(int i, int j) const { return data[j][i]; };
61			GLfloat &operator ()(int i, int j) { return data[j][i]; };
62	root	1.5
63			void diagonal (GLfloat v);
64			void clear () { diagonal (0.); };
65			void identity () { diagonal (1.); };
66
67			void print (); // ugly
68
69	root	1.16	static const matrix translation (const vec3 &v);
70			static const matrix rotation (GLfloat degrees, const vec3 &axis);
71	root	1.5
72	root	1.16	matrix () { };
73			matrix (GLfloat diag) { diagonal (diag); };
74
75			operator ShMatrix4x4f() const
76			{
77			ShMatrix4x4f r;
78
79			for (int i = 0; i < 4; i++)
80			for (int j = 0; j < 4 ; j++)
81			r[i][j] = data[j][i];
82
83			return r;
84			}
85	root	1.5	};
86
87	root	1.16	const matrix operator *(const matrix &a, const matrix &b);
88			const vec3 operator *(const matrix &a, const vec3 &v);
89	root	1.10
90			typedef vec3 point;
91
92			// a generic plane
93	root	1.12	struct plane {
94	root	1.10	vec3 n;
95			GLfloat d;
96
97			GLfloat distance (const point &p) const
98			{
99			return dot (n, p) + d;
100			}
101
102			plane () { };
103			plane (GLfloat a, GLfloat b, GLfloat c, GLfloat d);
104			};
105
106			struct sector {
107			soffs x, y, z;
108
109			sector (soffs x = 0, soffs y = 0, soffs z = 0) : x(x), y(y), z(z) { };
110
111			void offset (int subindex, uoffs extent)
112			{
113			if (subindex & 1) x += extent;
114			if (subindex & 2) y += extent;
115			if (subindex & 4) z += extent;
116			}
117			};
118
119			inline const sector translate (const sector &p, const sector &src, const sector &dst)
120			{
121			sector r;
122
123			r.x = p.x + (dst.x - src.x);
124			r.y = p.y + (dst.y - src.y);
125			r.z = p.z + (dst.z - src.z);
126
127			return r;
128			}
129
130			void renormalize (sector &s, point &p);
131
132			struct colour {
133			GLfloat r, g, b, a;
134			colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.) : r(r), g(g), b(b), a(a) { };
135			};
136	root	1.5
137	root	1.1	struct texc {
138			GLfloat s, t;
139			texc () { };
140			texc (GLfloat s, GLfloat t) : s(s), t(t) { };
141			};
142
143			struct box {
144	root	1.8	sector a, b;
145
146			box() { };
147	root	1.1
148			void reset ()
149			{
150	root	1.9	a = sector (SOFFS_MAX, SOFFS_MAX, SOFFS_MAX);
151			b = sector (SOFFS_MIN, SOFFS_MIN, SOFFS_MIN);
152	root	1.1	}
153
154			void add (const box &o);
155	root	1.8	void add (const sector &p);
156	root	1.1	void add (const point &p);
157			};
158	root	1.5
159			inline const box translate (const box &b, const sector &src, const sector &dst)
160			{
161			box r;
162
163			r.a = translate (b.a, src, dst);
164			r.b = translate (b.b, src, dst);
165
166			return r;
167			}
168	root	1.1
169			struct light {
170			point p;
171			colour c;
172			GLfloat intensity;
173			GLfloat radius;
174	root	1.2	};
175
176			struct material {
177			colour diffuse, specular, emission;
178			GLfloat shininess;
179	root	1.1	};
180
181	root	1.4	struct entity_base;
182			struct draw_context;
183	root	1.7
184			extern struct timer {
185			static double now;
186			static double diff;
187
188			static void frame ();
189			timer ();
190			} timer;
191	root	1.11
192	root	1.13	/*
193	root	1.11	#define MAX_EVENT_TYPES 10
194			enum event_type { TIMER_EV };
195			struct event {
196			event_type type;
197			};
198
199			typedef callback1<void, event&> event_cb;
200
201			class skedjuhlar {
202
203			public:
204			// only 10 types for now
205			private:
206			vector <list<event_cb> > event_lists;
207
208			public:
209			skedjuhlar () {
210			event_lists.resize (MAX_EVENT_TYPES, list<event_cb>());
211			}
212
213			void register_event_cb (const event_type &t, const event_cb &e) {
214			event_lists[t].push_back (e);
215			};
216			void send_event (event &e) {
217			list<event_cb> &l = event_lists[e.type];
218			for (list<event_cb>::iterator it = l.begin (); it != l.end (); it++) {
219			(*it)(e);
220			}
221			};
222			void check_events () {
223			while (!events.empty ()) {
224			event &e = events.pop_front ();
225			list<event_cb> &l = event_lists[e->name];
226			for (list<event_cb>::iterator it = l.begin (); it !+ l.end (); it++) {
227			(*it)(e);
228			}
229			delete e; // ugly slow? hai hai..... 183G
230			}
231			}
232			};
233
234			extern skedjuhlar main_scheduler;
235	root	1.13	*/
236	root	1.1
237			#endif
238