| 1 |
root |
1.1 |
#include <cmath> |
| 2 |
|
|
|
| 3 |
|
|
#include "oct.h" |
| 4 |
|
|
#include "view.h" |
| 5 |
|
|
|
| 6 |
|
|
draw_context::draw_context () |
| 7 |
|
|
{ |
| 8 |
|
|
} |
| 9 |
|
|
|
| 10 |
|
|
draw_context::~draw_context () |
| 11 |
|
|
{ |
| 12 |
|
|
} |
| 13 |
|
|
|
| 14 |
|
|
bool draw_context::may_draw (entity_base *e) |
| 15 |
|
|
{ |
| 16 |
|
|
if (drawn.find (e) != drawn.end ()) |
| 17 |
|
|
return false; |
| 18 |
|
|
|
| 19 |
|
|
drawn.insert (e); |
| 20 |
|
|
return true; |
| 21 |
|
|
} |
| 22 |
|
|
|
| 23 |
|
|
void view::draw (draw_context &ctx) |
| 24 |
|
|
{ |
| 25 |
|
|
glViewport (0, 0, w, h); |
| 26 |
|
|
|
| 27 |
|
|
glMatrixMode (GL_PROJECTION); |
| 28 |
|
|
glLoadIdentity (); |
| 29 |
|
|
|
| 30 |
|
|
GLdouble aspect = (GLdouble)w/h; |
| 31 |
|
|
GLdouble zNear = 0.0001; |
| 32 |
|
|
GLdouble zFar = 1000.; |
| 33 |
|
|
|
| 34 |
|
|
GLdouble ymax = zNear * tan (fov * (M_PI / 360.0)); |
| 35 |
|
|
glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, zNear, zFar); |
| 36 |
|
|
|
| 37 |
|
|
vec3 rz = -d; |
| 38 |
|
|
vec3 rx = cross (u, rz); |
| 39 |
|
|
vec3 ry = cross (rz, rx); |
| 40 |
|
|
|
| 41 |
|
|
GLfloat m[4][4]; |
| 42 |
|
|
m[0][0] = rx.x; m[0][1] = rx.y; m[0][2] = rx.z; m[0][3] = 0; |
| 43 |
|
|
m[1][0] = ry.x; m[1][1] = ry.y; m[1][2] = ry.z; m[1][3] = 0; |
| 44 |
|
|
m[2][0] = rz.x; m[2][1] = rz.y; m[2][2] = rz.z; m[2][3] = 0; |
| 45 |
|
|
m[3][0] = 0; m[3][1] = 0; m[3][2] = 0; m[3][3] = 1; |
| 46 |
|
|
glMultMatrixf ((GLfloat *)m); |
| 47 |
|
|
|
| 48 |
|
|
glTranslatef (-p.x, -p.y, -p.z); |
| 49 |
|
|
|
| 50 |
|
|
glMatrixMode (GL_MODELVIEW); |
| 51 |
|
|
glLoadIdentity (); |
| 52 |
|
|
|
| 53 |
|
|
world.draw (ctx); |
| 54 |
|
|
} |
| 55 |
|
|
|
