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 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:
      void new_from_file (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:	1.22
Committed:	Wed Oct 6 06:05:23 2004 UTC (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.21:	+37 -0 lines
Log Message:	texture stuff 1
#	User	Rev	Content
1	root	1.1	#ifndef UTIL_H
2			#define UTIL_H
3
4	root	1.22	#include <SDL/SDL.h>
5			#include <SDL/SDL_image.h>
6	root	1.7	#include <cmath>
7	root	1.1	#include <vector>
8	root	1.22	#include <string>
9	root	1.1
10	root	1.18	#include <Cg/cg.h>
11			#include <Cg/cgGL.h>
12
13	root	1.1	using namespace std;
14	root	1.18
15			extern CGcontext cgc;
16			extern CGprogram vsh;
17			extern CGprogram fsh;
18	root	1.19	extern CGparameter mv, mvp, lightpos;
19	root	1.21	extern CGprofile vsh_profile, fsh_profile;
20	root	1.1
21	root	1.7	#include <GL/gl.h>
22
23	root	1.3	typedef int soffs; // 32 bit
24			typedef unsigned int uoffs;
25	root	1.4	#define OFFS_BITS 31
26	root	1.9	#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	root	1.1
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	root	1.6
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	root	1.1
60	root	1.16	struct matrix {
61	root	1.5	GLfloat data[4][4];
62
63	root	1.12	const GLfloat operator ()(int i, int j) const { return data[j][i]; };
64			GLfloat &operator ()(int i, int j) { return data[j][i]; };
65	root	1.5
66			void diagonal (GLfloat v);
67			void clear () { diagonal (0.); };
68			void identity () { diagonal (1.); };
69
70			void print (); // ugly
71
72	root	1.16	static const matrix translation (const vec3 &v);
73			static const matrix rotation (GLfloat degrees, const vec3 &axis);
74	root	1.5
75	root	1.16	matrix () { };
76			matrix (GLfloat diag) { diagonal (diag); };
77	root	1.5	};
78
79	root	1.16	const matrix operator *(const matrix &a, const matrix &b);
80			const vec3 operator *(const matrix &a, const vec3 &v);
81	root	1.10
82			typedef vec3 point;
83
84			// a generic plane
85	root	1.12	struct plane {
86	root	1.10	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 translate (const sector &p, const sector &src, const sector &dst)
112			{
113			sector r;
114
115			r.x = p.x + (dst.x - src.x);
116			r.y = p.y + (dst.y - src.y);
117			r.z = p.z + (dst.z - src.z);
118
119			return r;
120			}
121
122			void renormalize (sector &s, point &p);
123
124			struct colour {
125			GLfloat r, g, b, a;
126			colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.) : r(r), g(g), b(b), a(a) { };
127			};
128	root	1.5
129	root	1.1	struct texc {
130			GLfloat s, t;
131			texc () { };
132			texc (GLfloat s, GLfloat t) : s(s), t(t) { };
133			};
134
135			struct box {
136	root	1.8	sector a, b;
137
138			box() { };
139	root	1.1
140			void reset ()
141			{
142	root	1.9	a = sector (SOFFS_MAX, SOFFS_MAX, SOFFS_MAX);
143			b = sector (SOFFS_MIN, SOFFS_MIN, SOFFS_MIN);
144	root	1.1	}
145
146			void add (const box &o);
147	root	1.8	void add (const sector &p);
148	root	1.1	void add (const point &p);
149			};
150	root	1.5
151			inline const box translate (const box &b, const sector &src, const sector &dst)
152			{
153			box r;
154
155			r.a = translate (b.a, src, dst);
156			r.b = translate (b.b, src, dst);
157
158			return r;
159			}
160	root	1.1
161			struct light {
162			point p;
163			colour c;
164			GLfloat intensity;
165			GLfloat radius;
166	root	1.2	};
167
168			struct material {
169			colour diffuse, specular, emission;
170			GLfloat shininess;
171	root	1.1	};
172
173	root	1.4	struct entity_base;
174	root	1.20	struct view;
175	root	1.7
176			extern struct timer {
177			static double now;
178			static double diff;
179
180			static void frame ();
181			timer ();
182			} timer;
183	root	1.11
184	root	1.13	/*
185	root	1.11	#define MAX_EVENT_TYPES 10
186			enum event_type { TIMER_EV };
187			struct event {
188			event_type type;
189			};
190
191			typedef callback1<void, event&> event_cb;
192
193			class skedjuhlar {
194
195			public:
196			// only 10 types for now
197			private:
198			vector <list<event_cb> > event_lists;
199
200			public:
201			skedjuhlar () {
202			event_lists.resize (MAX_EVENT_TYPES, list<event_cb>());
203			}
204
205			void register_event_cb (const event_type &t, const event_cb &e) {
206			event_lists[t].push_back (e);
207			};
208			void send_event (event &e) {
209			list<event_cb> &l = event_lists[e.type];
210			for (list<event_cb>::iterator it = l.begin (); it != l.end (); it++) {
211			(*it)(e);
212			}
213			};
214			void check_events () {
215			while (!events.empty ()) {
216			event &e = events.pop_front ();
217			list<event_cb> &l = event_lists[e->name];
218			for (list<event_cb>::iterator it = l.begin (); it !+ l.end (); it++) {
219			(*it)(e);
220			}
221			delete e; // ugly slow? hai hai..... 183G
222			}
223			}
224			};
225
226			extern skedjuhlar main_scheduler;
227	root	1.13	*/
228	root	1.22
229			GLuint SDL_GL_LoadTexture (SDL_Surface * surface, GLfloat * texcoord);
230			inline int power_of_two (int input)
231			{
232			int value = 1;
233
234			while (value < input)
235			{
236			value <<= 1;
237			}
238			return value;
239			}
240
241
242
243			struct TextureExecption {
244			TextureExecption(string s) : msg(s) {}
245			string msg;
246			};
247			struct Texture {
248			SDL_Surface *image;
249			GLuint texture;
250			GLfloat texcoord[4];
251
252			public:
253			void new_from_file (const char *f) {
254			image = IMG_Load(f);
255			if(!image)
256			throw (TextureExecption("Couldn't load " + (string) f + ": " + (string) IMG_GetError ()));
257			texture = SDL_GL_LoadTexture (image, (GLfloat*)&texcoord);
258			if (texture == 0)
259			throw (TextureExecption("Couldn't make GL Texture, failed to create new RGB SWSurface"));
260			}
261			};
262	root	1.1
263			#endif
264