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 sector operator >>(const sector &a, unsigned int 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
{
  GLubyte r, g, b, a;
  colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.)
  : r(GLubyte (r * 255.F + .5F))
  , g(GLubyte (g * 255.F + .5F))
  , b(GLubyte (b * 255.F + .5F))
  , a(GLubyte (a * 255.F + .5F))
  {
  }
};

struct tex2
{
  GLfloat s, t;
  tex2 () { };
  tex2 (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
{
  struct vertex_v3f
  {
    point p; // vertex

    vertex_v3f () { };
    vertex_v3f (point p) : p(p) { };

    GLenum gl_format () const { return GL_V3F; }
  };

  struct vertex_t2f_n3f_v3f
  {
    tex2  t; // texture
    vec3  n; // normal
    point p; // vertex

    vertex_t2f_n3f_v3f () { };
    vertex_t2f_n3f_v3f (point p, vec3 n, tex2 t = tex2()) : p(p), n(n), t(t) { };

    GLenum gl_format () const { return GL_T2F_N3F_V3F; }
  };

  extern int nesting;
  void errchk (const char *name, const char *args, const char *file, int line);

  struct vertex_buffer_object {
    GLuint buffer;
    GLenum format;

    void alloc ()
    {
      if (!buffer)
        glGenBuffersARB (1, &buffer);
    }

    void bind (GLenum target = GL_ARRAY_BUFFER_ARB)
    {
      glBindBufferARB (target, buffer);
      glInterleavedArrays (format, 0, 0);
    }

    void draw (GLenum mode, GLint first, GLsizei count)
    {
      bind ();
      glDrawArrays (mode, first, count);
    }

    template<class vertex>
    void set (const vertex *v, GLsizei count, GLenum usage = GL_STATIC_DRAW_ARB, GLenum target = GL_ARRAY_BUFFER_ARB)
    {
      alloc ();
      format = v->gl_format ();
      glBindBufferARB (target, buffer);
      glBufferDataARB (target, count * sizeof (vertex), v, usage);
    }

    template<class vertex>
    void set (const vector<vertex> &v, GLenum usage = GL_STATIC_DRAW_ARB, GLenum target = GL_ARRAY_BUFFER_ARB)
    {
      set (&v[0], v.size (), usage, target);
    }

    vertex_buffer_object ()
    : buffer(0)
    {
    }
    
    ~vertex_buffer_object ()
    {
      glDeleteBuffersARB (1, &buffer);
    }

    operator GLint ()
    {
      return buffer;
    }
  };

  const GLenum  bbox_mode  = GL_QUADS;
  const GLsizei bbox_count = 6*4;
  void gen_bbox (vertex_buffer_object &vb, const sector &a, const sector &b);
}

GLuint SDL_GL_LoadTexture (SDL_Surface *surface, GLfloat *texcoord);

#endif

Revision:	1.40
Committed:	Sat Oct 16 23:23:21 2004 UTC (19 years, 7 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.39:	+95 -7 lines
Log Message:	* empty log message *
#	Content
1	#ifndef UTIL_H
2	#define UTIL_H
3
4	#include <cmath>
5	#include <cfloat>
6	#include <cstdlib>
7	#include <vector>
8	#include <string>
9
10	#include "opengl.h"
11
12	#include <SDL/SDL_image.h>
13
14	using namespace std;
15
16	extern CGcontext cgc;
17	extern CGprogram vsh;
18	extern CGprogram fsh;
19	extern CGparameter mv, mvp, lightpos;
20	extern CGprofile vsh_profile, fsh_profile;
21
22	typedef long long soffs; // 32 bit
23	typedef unsigned long long uoffs;
24	#define OFFS_BITS 63
25	#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
29	#define ABS(n) ((n) < 0 ? -(n) : (n))
30
31	struct sector
32	{
33	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 sector operator >>(const sector &a, unsigned int b)
62	{
63	return sector (a.x >> b, a.y >> b, a.z >> b);
64	}
65
66	inline bool operator <=(const sector &a, const sector &b)
67	{
68	return a.x <= b.x && a.y <= b.y && a.z <= b.z;
69	}
70
71	inline soffs max (const sector &a)
72	{
73	return max (a.x, max (a.y, a.z));
74	}
75
76	inline sector translate (const sector &p, const sector &src, const sector &dst)
77	{
78	return p + (dst - src);
79	}
80
81	inline sector abs (const sector &s)
82	{
83	return sector (ABS (s.x), ABS (s.y), ABS (s.z));
84	}
85
86	struct vec3
87	{
88	GLfloat x, y, z;
89	vec3 () { };
90	vec3 (GLfloat s) : x(s), y(s), z(s) { };
91	vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
92	vec3 (const sector &s) : x(s.x), y(s.y), z(s.z) { };
93
94	const vec3 operator -() const
95	{ return vec3 (-x, -y, -z); }
96	};
97
98	const vec3 normalize (const vec3 &v);
99	const vec3 cross (const vec3 &a, const vec3 &b);
100
101	inline const vec3 operator *(const vec3 &a, GLfloat s)
102	{
103	return vec3 (a.x * s, a.y * s, a.z * s);
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	inline const vec3 operator -(const vec3 &a, const vec3 &b)
112	{
113	return vec3 (a.x - b.x, a.y - b.y, a.z - b.z);
114	}
115
116	inline GLfloat dot (const vec3 &a, const vec3 &b)
117	{
118	return a.x * b.x + a.y * b.y + a.z * b.z;
119	}
120
121	inline const GLfloat norm (const vec3 &v)
122	{
123	return sqrtf (dot (v, v));
124	}
125
126	struct matrix
127	{
128	GLfloat data[4][4];
129
130	const GLfloat operator ()(int i, int j) const { return data[j][i]; };
131	GLfloat &operator ()(int i, int j) { return data[j][i]; };
132
133	operator GLfloat *() { return &data[0][0]; }
134
135	void diagonal (GLfloat v);
136	void clear () { diagonal (0.F); };
137	void identity () { diagonal (1.F); };
138
139	void print (); // ugly
140
141	static const matrix translation (const vec3 &v);
142	static const matrix rotation (GLfloat degrees, const vec3 &axis);
143
144	matrix () { };
145	matrix (GLfloat diag) { diagonal (diag); };
146	};
147
148	const matrix operator *(const matrix &a, const matrix &b);
149	const vec3 operator *(const matrix &a, const vec3 &v);
150
151	typedef vec3 point;
152
153	// a generic plane
154	struct plane
155	{
156	vec3 n;
157	GLfloat d;
158
159	GLfloat distance (const point &p) const
160	{
161	return dot (n, p) + d;
162	}
163
164	plane () { };
165	plane (GLfloat a, GLfloat b, GLfloat c, GLfloat d);
166	};
167
168	void renormalize (sector &s, point &p);
169
170	struct colour
171	{
172	GLubyte r, g, b, a;
173	colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.)
174	: r(GLubyte (r * 255.F + .5F))
175	, g(GLubyte (g * 255.F + .5F))
176	, b(GLubyte (b * 255.F + .5F))
177	, a(GLubyte (a * 255.F + .5F))
178	{
179	}
180	};
181
182	struct tex2
183	{
184	GLfloat s, t;
185	tex2 () { };
186	tex2 (GLfloat s, GLfloat t) : s(s), t(t) { };
187	};
188
189	struct box
190	{
191	point a, b;
192
193	box() { };
194
195	void reset ()
196	{
197	a = point ( FLT_MAX, FLT_MAX, FLT_MAX);
198	b = point (-FLT_MAX, -FLT_MAX, -FLT_MAX);
199	}
200
201	void add (const box &o);
202	void add (const point &p);
203	};
204
205	struct entity;
206	struct geometry;
207	struct view;
208	struct octant;
209
210	extern struct timer
211	{
212	static double now;
213	static double diff;
214
215	static void frame ();
216	timer ();
217	} timer;
218
219	/*
220	#define MAX_EVENT_TYPES 10
221	enum event_type { TIMER_EV };
222	struct event
223	{
224	event_type type;
225	};
226
227	typedef callback1<void, event&> event_cb;
228
229	class skedjuhlar
230	{
231	public:
232	// only 10 types for now
233	private:
234	vector <list<event_cb> > event_lists;
235
236	public:
237	skedjuhlar () {
238	event_lists.resize (MAX_EVENT_TYPES, list<event_cb>());
239	}
240
241	void register_event_cb (const event_type &t, const event_cb &e) {
242	event_lists[t].push_back (e);
243	};
244	void send_event (event &e) {
245	list<event_cb> &l = event_lists[e.type];
246	for (list<event_cb>::iterator it = l.begin (); it != l.end (); it++) {
247	(*it)(e);
248	}
249	};
250	void check_events () {
251	while (!events.empty ()) {
252	event &e = events.pop_front ();
253	list<event_cb> &l = event_lists[e->name];
254	for (list<event_cb>::iterator it = l.begin (); it !+ l.end (); it++) {
255	(*it)(e);
256	}
257	delete e; // ugly slow? hai hai..... 183G
258	}
259	}
260	};
261
262	extern skedjuhlar main_scheduler;
263	*/
264
265	namespace gl
266	{
267	struct vertex_v3f
268	{
269	point p; // vertex
270
271	vertex_v3f () { };
272	vertex_v3f (point p) : p(p) { };
273
274	GLenum gl_format () const { return GL_V3F; }
275	};
276
277	struct vertex_t2f_n3f_v3f
278	{
279	tex2 t; // texture
280	vec3 n; // normal
281	point p; // vertex
282
283	vertex_t2f_n3f_v3f () { };
284	vertex_t2f_n3f_v3f (point p, vec3 n, tex2 t = tex2()) : p(p), n(n), t(t) { };
285
286	GLenum gl_format () const { return GL_T2F_N3F_V3F; }
287	};
288
289	extern int nesting;
290	void errchk (const char name, const char args, const char *file, int line);
291
292	struct vertex_buffer_object {
293	GLuint buffer;
294	GLenum format;
295
296	void alloc ()
297	{
298	if (!buffer)
299	glGenBuffersARB (1, &buffer);
300	}
301
302	void bind (GLenum target = GL_ARRAY_BUFFER_ARB)
303	{
304	glBindBufferARB (target, buffer);
305	glInterleavedArrays (format, 0, 0);
306	}
307
308	void draw (GLenum mode, GLint first, GLsizei count)
309	{
310	bind ();
311	glDrawArrays (mode, first, count);
312	}
313
314	template<class vertex>
315	void set (const vertex *v, GLsizei count, GLenum usage = GL_STATIC_DRAW_ARB, GLenum target = GL_ARRAY_BUFFER_ARB)
316	{
317	alloc ();
318	format = v->gl_format ();
319	glBindBufferARB (target, buffer);
320	glBufferDataARB (target, count * sizeof (vertex), v, usage);
321	}
322
323	template<class vertex>
324	void set (const vector<vertex> &v, GLenum usage = GL_STATIC_DRAW_ARB, GLenum target = GL_ARRAY_BUFFER_ARB)
325	{
326	set (&v[0], v.size (), usage, target);
327	}
328
329	vertex_buffer_object ()
330	: buffer(0)
331	{
332	}
333
334	~vertex_buffer_object ()
335	{
336	glDeleteBuffersARB (1, &buffer);
337	}
338
339	operator GLint ()
340	{
341	return buffer;
342	}
343	};
344
345	const GLenum bbox_mode = GL_QUADS;
346	const GLsizei bbox_count = 6*4;
347	void gen_bbox (vertex_buffer_object &vb, const sector &a, const sector &b);
348	}
349
350	GLuint SDL_GL_LoadTexture (SDL_Surface surface, GLfloat texcoord);
351
352	#endif
353