libgender/util.h

#ifndef UTIL_H
#define UTIL_H

#include <SDL/SDL.h>
#include <SDL/SDL_image.h>
#include <cmath>
#include <vector>
#include <string>

#include <Cg/cg.h>
#include <Cg/cgGL.h>

using namespace std;

extern CGcontext cgc;
extern CGprogram vsh;
extern CGprogram fsh;
extern CGparameter mv, mvp, lightpos;
extern CGprofile vsh_profile, fsh_profile;

#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 operator +(const sector &a, const sector &b)
{
  return sector (a.x + b.x, a.y + b.y, a.z + b.z);
}

inline const sector operator -(const sector &a, const sector &b)
{
  return sector (a.x - b.x, a.y - b.y, a.z - b.z);
}

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 view;

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;
*/

GLuint SDL_GL_LoadTexture (SDL_Surface * surface, GLfloat * texcoord);
inline int power_of_two (int input)
{
  int value = 1;

  while (value < input)
    {
      value <<= 1;
    }
  return value;
}


struct TextureExecption { 
   TextureExecption(string s) : msg(s) {}
   string msg; 
};
struct Texture {
   SDL_Surface *image;
   GLuint texture;
   GLfloat texcoord[4];

   public:
      Texture(const char *f) {
         image = IMG_Load(f);
         if(!image) 
            throw (TextureExecption("Couldn't load " + (string) f + ": " + (string) IMG_GetError ()));
         texture = SDL_GL_LoadTexture (image, (GLfloat*)&texcoord);
         if (texture == 0) 
            throw (TextureExecption("Couldn't make GL Texture, failed to create new RGB SWSurface"));
      }
};

#endif

Revision:	1.24
Committed:	Wed Oct 6 09:41:48 2004 UTC (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.23:	+1 -1 lines
Log Message:	Texture mapping
#	Content
1	#ifndef UTIL_H
2	#define UTIL_H
3
4	#include <SDL/SDL.h>
5	#include <SDL/SDL_image.h>
6	#include <cmath>
7	#include <vector>
8	#include <string>
9
10	#include <Cg/cg.h>
11	#include <Cg/cgGL.h>
12
13	using namespace std;
14
15	extern CGcontext cgc;
16	extern CGprogram vsh;
17	extern CGprogram fsh;
18	extern CGparameter mv, mvp, lightpos;
19	extern CGprofile vsh_profile, fsh_profile;
20
21	#include <GL/gl.h>
22
23	typedef int soffs; // 32 bit
24	typedef unsigned int uoffs;
25	#define OFFS_BITS 31
26	#define SOFFS_MIN (soffs)-(1 << (OFFS_BITS - 2))
27	#define SOFFS_MAX (soffs)+(1 << (OFFS_BITS - 2))
28	#define MAXEXTENT (1UL << (OFFS_BITS - 1))
29
30	#define GLFLOAT_MAX 1e30
31	#define GLFLOAT_MIN -1e30
32
33	struct vec3 {
34	GLfloat x, y, z;
35	vec3 () { };
36	vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
37
38	const vec3 operator -() const
39	{ return vec3 (-x, -y, -z); }
40	};
41
42	const vec3 normalize (const vec3 &v);
43	const vec3 cross (const vec3 &a, const vec3 &b);
44
45	inline const vec3 operator *(const vec3 &a, GLfloat s)
46	{
47	return vec3 (a.x * s, a.y * s, a.z * s);
48	}
49
50	inline GLfloat dot (const vec3 &a, const vec3 &b)
51	{
52	return a.x * b.x + a.y * b.y + a.z * b.z;
53	}
54
55	inline const GLfloat abs (const vec3 &v)
56	{
57	return sqrtf (dot (v, v));
58	}
59
60	struct matrix {
61	GLfloat data[4][4];
62
63	const GLfloat operator ()(int i, int j) const { return data[j][i]; };
64	GLfloat &operator ()(int i, int j) { return data[j][i]; };
65
66	void diagonal (GLfloat v);
67	void clear () { diagonal (0.); };
68	void identity () { diagonal (1.); };
69
70	void print (); // ugly
71
72	static const matrix translation (const vec3 &v);
73	static const matrix rotation (GLfloat degrees, const vec3 &axis);
74
75	matrix () { };
76	matrix (GLfloat diag) { diagonal (diag); };
77	};
78
79	const matrix operator *(const matrix &a, const matrix &b);
80	const vec3 operator *(const matrix &a, const vec3 &v);
81
82	typedef vec3 point;
83
84	// a generic plane
85	struct plane {
86	vec3 n;
87	GLfloat d;
88
89	GLfloat distance (const point &p) const
90	{
91	return dot (n, p) + d;
92	}
93
94	plane () { };
95	plane (GLfloat a, GLfloat b, GLfloat c, GLfloat d);
96	};
97
98	struct sector {
99	soffs x, y, z;
100
101	sector (soffs x = 0, soffs y = 0, soffs z = 0) : x(x), y(y), z(z) { };
102
103	void offset (int subindex, uoffs extent)
104	{
105	if (subindex & 1) x += extent;
106	if (subindex & 2) y += extent;
107	if (subindex & 4) z += extent;
108	}
109	};
110
111	inline const sector operator +(const sector &a, const sector &b)
112	{
113	return sector (a.x + b.x, a.y + b.y, a.z + b.z);
114	}
115
116	inline const sector operator -(const sector &a, const sector &b)
117	{
118	return sector (a.x - b.x, a.y - b.y, a.z - b.z);
119	}
120
121	inline const sector translate (const sector &p, const sector &src, const sector &dst)
122	{
123	sector r;
124
125	r.x = p.x + (dst.x - src.x);
126	r.y = p.y + (dst.y - src.y);
127	r.z = p.z + (dst.z - src.z);
128
129	return r;
130	}
131
132	void renormalize (sector &s, point &p);
133
134	struct colour {
135	GLfloat r, g, b, a;
136	colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.) : r(r), g(g), b(b), a(a) { };
137	};
138
139	struct texc {
140	GLfloat s, t;
141	texc () { };
142	texc (GLfloat s, GLfloat t) : s(s), t(t) { };
143	};
144
145	struct box {
146	sector a, b;
147
148	box() { };
149
150	void reset ()
151	{
152	a = sector (SOFFS_MAX, SOFFS_MAX, SOFFS_MAX);
153	b = sector (SOFFS_MIN, SOFFS_MIN, SOFFS_MIN);
154	}
155
156	void add (const box &o);
157	void add (const sector &p);
158	void add (const point &p);
159	};
160
161	inline const box translate (const box &b, const sector &src, const sector &dst)
162	{
163	box r;
164
165	r.a = translate (b.a, src, dst);
166	r.b = translate (b.b, src, dst);
167
168	return r;
169	}
170
171	struct light {
172	point p;
173	colour c;
174	GLfloat intensity;
175	GLfloat radius;
176	};
177
178	struct material {
179	colour diffuse, specular, emission;
180	GLfloat shininess;
181	};
182
183	struct entity_base;
184	struct view;
185
186	extern struct timer {
187	static double now;
188	static double diff;
189
190	static void frame ();
191	timer ();
192	} timer;
193
194	/*
195	#define MAX_EVENT_TYPES 10
196	enum event_type { TIMER_EV };
197	struct event {
198	event_type type;
199	};
200
201	typedef callback1<void, event&> event_cb;
202
203	class skedjuhlar {
204
205	public:
206	// only 10 types for now
207	private:
208	vector <list<event_cb> > event_lists;
209
210	public:
211	skedjuhlar () {
212	event_lists.resize (MAX_EVENT_TYPES, list<event_cb>());
213	}
214
215	void register_event_cb (const event_type &t, const event_cb &e) {
216	event_lists[t].push_back (e);
217	};
218	void send_event (event &e) {
219	list<event_cb> &l = event_lists[e.type];
220	for (list<event_cb>::iterator it = l.begin (); it != l.end (); it++) {
221	(*it)(e);
222	}
223	};
224	void check_events () {
225	while (!events.empty ()) {
226	event &e = events.pop_front ();
227	list<event_cb> &l = event_lists[e->name];
228	for (list<event_cb>::iterator it = l.begin (); it !+ l.end (); it++) {
229	(*it)(e);
230	}
231	delete e; // ugly slow? hai hai..... 183G
232	}
233	}
234	};
235
236	extern skedjuhlar main_scheduler;
237	*/
238
239	GLuint SDL_GL_LoadTexture (SDL_Surface * surface, GLfloat * texcoord);
240	inline int power_of_two (int input)
241	{
242	int value = 1;
243
244	while (value < input)
245	{
246	value <<= 1;
247	}
248	return value;
249	}
250
251
252
253	struct TextureExecption {
254	TextureExecption(string s) : msg(s) {}
255	string msg;
256	};
257	struct Texture {
258	SDL_Surface *image;
259	GLuint texture;
260	GLfloat texcoord[4];
261
262	public:
263	Texture(const char *f) {
264	image = IMG_Load(f);
265	if(!image)
266	throw (TextureExecption("Couldn't load " + (string) f + ": " + (string) IMG_GetError ()));
267	texture = SDL_GL_LoadTexture (image, (GLfloat*)&texcoord);
268	if (texture == 0)
269	throw (TextureExecption("Couldn't make GL Texture, failed to create new RGB SWSurface"));
270	}
271	};
272
273	#endif
274