libgender/util.h

#ifndef UTIL_H
#define UTIL_H

#include <GL/gl.h>

#include <vector>

using namespace std;

typedef int soffs; // 32 bit
typedef unsigned int uoffs;
#define SOFFS_MIN (soffs)(1UL << 31)
#define MAXEXTENT ~(uoffs)0

#define GLFLOAT_MAX 1e30
#define GLFLOAT_MIN -1e30

struct sector {
  soffs x, y, z;

  void offset (int subindex, uoffs extent)
  {
    if (subindex & 1) x += extent;
    if (subindex & 2) y += extent;
    if (subindex & 4) z += extent;
  }
};

struct point {
  GLfloat x, y, z;

  point () { };
  point (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
};

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 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);
GLfloat dot (const vec3 &a, const vec3 &b);

struct texc {
  GLfloat s, t;
  texc () { };
  texc (GLfloat s, GLfloat t) : s(s), t(t) { };
};

struct box {
  point a, b;

  void reset ()
  {
    a = point (GLFLOAT_MAX, GLFLOAT_MAX, GLFLOAT_MAX);
    b = point (GLFLOAT_MIN, GLFLOAT_MIN, GLFLOAT_MIN);
  }

  void add (const box &o);
  void add (const point &p);
};

struct light {
  point p;
  colour c;
  GLfloat intensity;
  GLfloat radius;
};

struct material {
  colour diffuse, specular, emission;
  GLfloat shininess;
};

struct draw_context {
  enum { DEPTH, LIGHTED } mode;
  light *l;
};

#endif

Revision:	1.3
Committed:	Sun Oct 3 03:51:51 2004 UTC (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.2:	+11 -2 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#ifndef UTIL_H
2			#define UTIL_H
3
4			#include <GL/gl.h>
5
6			#include <vector>
7
8			using namespace std;
9
10	root	1.3	typedef int soffs; // 32 bit
11			typedef unsigned int uoffs;
12			#define SOFFS_MIN (soffs)(1UL << 31)
13			#define MAXEXTENT ~(uoffs)0
14	root	1.1
15			#define GLFLOAT_MAX 1e30
16			#define GLFLOAT_MIN -1e30
17
18			struct sector {
19			soffs x, y, z;
20	root	1.3
21			void offset (int subindex, uoffs extent)
22			{
23			if (subindex & 1) x += extent;
24			if (subindex & 2) y += extent;
25			if (subindex & 4) z += extent;
26			}
27	root	1.1	};
28
29			struct point {
30			GLfloat x, y, z;
31
32			point () { };
33			point (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
34			};
35
36			struct colour {
37	root	1.2	GLfloat r, g, b, a;
38			colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.) : r(r), g(g), b(b), a(a) { };
39	root	1.1	};
40
41			struct vec3 {
42			GLfloat x, y, z;
43			vec3 () { };
44			vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
45
46			const vec3 operator -() const
47			{ return vec3 (-x, -y, -z); }
48			};
49
50			const vec3 normalize (const vec3 &v);
51			const vec3 cross (const vec3 &a, const vec3 &b);
52			GLfloat dot (const vec3 &a, const vec3 &b);
53
54			struct texc {
55			GLfloat s, t;
56			texc () { };
57			texc (GLfloat s, GLfloat t) : s(s), t(t) { };
58			};
59
60			struct box {
61			point a, b;
62
63			void reset ()
64			{
65			a = point (GLFLOAT_MAX, GLFLOAT_MAX, GLFLOAT_MAX);
66			b = point (GLFLOAT_MIN, GLFLOAT_MIN, GLFLOAT_MIN);
67			}
68
69			void add (const box &o);
70			void add (const point &p);
71			};
72
73			struct light {
74			point p;
75			colour c;
76			GLfloat intensity;
77			GLfloat radius;
78	root	1.2	};
79
80			struct material {
81			colour diffuse, specular, emission;
82			GLfloat shininess;
83	root	1.1	};
84
85			struct draw_context {
86			enum { DEPTH, LIGHTED } mode;
87			light *l;
88			};
89
90			#endif
91