| 1 |
root |
1.2 |
#include <cstdio> // ugly |
| 2 |
|
|
|
| 3 |
root |
1.1 |
#include <cmath> |
| 4 |
|
|
|
| 5 |
root |
1.2 |
#include <blitz/tinymat.h> |
| 6 |
|
|
|
| 7 |
|
|
using namespace blitz; |
| 8 |
|
|
|
| 9 |
root |
1.1 |
#include "util.h" |
| 10 |
|
|
|
| 11 |
|
|
const vec3 normalize (const vec3 &v) |
| 12 |
|
|
{ |
| 13 |
|
|
GLfloat s = 1. / sqrtf (v.x * v.x + v.y * v.y + v.z * v.z); |
| 14 |
|
|
|
| 15 |
|
|
return vec3 (v.x * s, v.y * s, v.z * s); |
| 16 |
|
|
} |
| 17 |
|
|
|
| 18 |
|
|
const vec3 cross (const vec3 &a, const vec3 &b) |
| 19 |
|
|
{ |
| 20 |
|
|
return vec3 ( |
| 21 |
|
|
a.y * b.z - a.z * b.y, |
| 22 |
|
|
a.z * b.x - a.x * b.z, |
| 23 |
|
|
a.x * b.y - a.y * b.x |
| 24 |
|
|
); |
| 25 |
|
|
} |
| 26 |
|
|
|
| 27 |
|
|
GLfloat dot (const vec3 &a, const vec3 &b) |
| 28 |
|
|
{ |
| 29 |
|
|
return a.x * b.x + a.y * b.y + a.z * b.z; |
| 30 |
root |
1.2 |
} |
| 31 |
|
|
|
| 32 |
|
|
void gl_matrix::diagonal (GLfloat v) |
| 33 |
|
|
{ |
| 34 |
|
|
for (int i = 4; i--; ) |
| 35 |
|
|
for (int j = 4; j--; ) |
| 36 |
|
|
data[i][j] = i == j ? v : 0.; |
| 37 |
|
|
} |
| 38 |
|
|
|
| 39 |
|
|
const gl_matrix operator *(const gl_matrix &a, const gl_matrix &b) |
| 40 |
|
|
{ |
| 41 |
|
|
gl_matrix r; |
| 42 |
|
|
|
| 43 |
|
|
int i, j, k; |
| 44 |
|
|
|
| 45 |
|
|
for (i = 0; i < 4; i++) |
| 46 |
|
|
for (j = 0; j < 4; j++) |
| 47 |
|
|
{ |
| 48 |
|
|
GLfloat s = 0.; |
| 49 |
|
|
for (k = 0; k < 4; k++) |
| 50 |
|
|
s += a(i,k) * b(k,j); |
| 51 |
|
|
|
| 52 |
|
|
r(i,j) = s; |
| 53 |
|
|
} |
| 54 |
|
|
|
| 55 |
|
|
return r; |
| 56 |
|
|
} |
| 57 |
|
|
|
| 58 |
|
|
void gl_matrix::print () |
| 59 |
|
|
{ |
| 60 |
|
|
printf ("\n"); |
| 61 |
|
|
printf ("[ %f, %f, %f, %f ]\n", data[0][0], data[1][0], data[2][0], data[3][0]); |
| 62 |
|
|
printf ("[ %f, %f, %f, %f ]\n", data[0][1], data[1][1], data[2][1], data[3][1]); |
| 63 |
|
|
printf ("[ %f, %f, %f, %f ]\n", data[0][2], data[1][2], data[2][2], data[3][2]); |
| 64 |
|
|
printf ("[ %f, %f, %f, %f ]\n", data[0][3], data[1][3], data[2][3], data[3][3]); |
| 65 |
|
|
} |
| 66 |
|
|
|
| 67 |
|
|
void gl_matrix::translate (const vec3 &v) |
| 68 |
|
|
{ |
| 69 |
|
|
gl_matrix m(1); |
| 70 |
|
|
|
| 71 |
|
|
m(3,0) = v.x; |
| 72 |
|
|
m(3,1) = v.y; |
| 73 |
|
|
m(3,2) = v.z; |
| 74 |
|
|
m(3,3) = 1; |
| 75 |
|
|
|
| 76 |
|
|
(*this) = (*this) * m; |
| 77 |
root |
1.1 |
} |
| 78 |
|
|
|
| 79 |
|
|
void box::add (const box &o) |
| 80 |
|
|
{ |
| 81 |
|
|
a.x = min (a.x, o.a.x); |
| 82 |
|
|
a.y = min (a.y, o.a.y); |
| 83 |
|
|
a.z = min (a.z, o.a.z); |
| 84 |
|
|
b.x = max (b.x, o.b.x); |
| 85 |
|
|
b.y = max (b.y, o.b.y); |
| 86 |
|
|
b.z = max (b.z, o.b.z); |
| 87 |
|
|
} |
| 88 |
|
|
|
| 89 |
|
|
void box::add (const point &p) |
| 90 |
|
|
{ |
| 91 |
|
|
a.x = min (a.x, p.x); |
| 92 |
|
|
a.y = min (a.y, p.y); |
| 93 |
|
|
a.z = min (a.z, p.z); |
| 94 |
|
|
b.x = max (b.x, p.x); |
| 95 |
|
|
b.y = max (b.y, p.y); |
| 96 |
|
|
b.z = max (b.z, p.z); |
| 97 |
|
|
} |
| 98 |
|
|
|
