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 OFFS_BITS 31
#define SOFFS_MIN (soffs)-(1 << (OFFS_BITS - 1))
#define MAXEXTENT ((1UL << OFFS_BITS) - 1)

#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 entity_base;
struct draw_context;

#endif

Revision:	1.4
Committed:	Sun Oct 3 05:10:46 2004 UTC (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.3:	+5 -6 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	root	1.4	#define OFFS_BITS 31
13			#define SOFFS_MIN (soffs)-(1 << (OFFS_BITS - 1))
14			#define MAXEXTENT ((1UL << OFFS_BITS) - 1)
15	root	1.1
16			#define GLFLOAT_MAX 1e30
17			#define GLFLOAT_MIN -1e30
18
19			struct sector {
20			soffs x, y, z;
21	root	1.3
22			void offset (int subindex, uoffs extent)
23			{
24			if (subindex & 1) x += extent;
25			if (subindex & 2) y += extent;
26			if (subindex & 4) z += extent;
27			}
28	root	1.1	};
29
30			struct point {
31			GLfloat x, y, z;
32
33			point () { };
34			point (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
35			};
36
37			struct colour {
38	root	1.2	GLfloat r, g, b, a;
39			colour (GLfloat r = 1., GLfloat g = 1., GLfloat b = 1., GLfloat a = 1.) : r(r), g(g), b(b), a(a) { };
40	root	1.1	};
41
42			struct vec3 {
43			GLfloat x, y, z;
44			vec3 () { };
45			vec3 (GLfloat x, GLfloat y, GLfloat z) : x(x), y(y), z(z) { };
46
47			const vec3 operator -() const
48			{ return vec3 (-x, -y, -z); }
49			};
50
51			const vec3 normalize (const vec3 &v);
52			const vec3 cross (const vec3 &a, const vec3 &b);
53			GLfloat dot (const vec3 &a, const vec3 &b);
54
55			struct texc {
56			GLfloat s, t;
57			texc () { };
58			texc (GLfloat s, GLfloat t) : s(s), t(t) { };
59			};
60
61			struct box {
62			point a, b;
63
64			void reset ()
65			{
66			a = point (GLFLOAT_MAX, GLFLOAT_MAX, GLFLOAT_MAX);
67			b = point (GLFLOAT_MIN, GLFLOAT_MIN, GLFLOAT_MIN);
68			}
69
70			void add (const box &o);
71			void add (const point &p);
72			};
73
74			struct light {
75			point p;
76			colour c;
77			GLfloat intensity;
78			GLfloat radius;
79	root	1.2	};
80
81			struct material {
82			colour diffuse, specular, emission;
83			GLfloat shininess;
84	root	1.1	};
85
86	root	1.4	struct entity_base;
87			struct draw_context;
88	root	1.1
89			#endif
90