| … | |
… | |
| 21 | return true; |
21 | return true; |
| 22 | } |
22 | } |
| 23 | |
23 | |
| 24 | void view::draw (draw_context &ctx) |
24 | void view::draw (draw_context &ctx) |
| 25 | { |
25 | { |
|
|
26 | |
|
|
27 | if (ctx.mode == draw_context::DEPTH) |
|
|
28 | { |
|
|
29 | glEnable (GL_POLYGON_OFFSET_FILL); |
|
|
30 | glPolygonOffset (0, 1); |
|
|
31 | glDrawBuffer (GL_NONE); |
|
|
32 | glDepthFunc (GL_LESS); |
|
|
33 | glDisable (GL_LIGHTING); |
|
|
34 | } |
|
|
35 | else |
|
|
36 | { |
|
|
37 | glDisable (GL_POLYGON_OFFSET_FILL); |
|
|
38 | glDrawBuffer (GL_BACK); |
|
|
39 | glDepthFunc (GL_LEQUAL); |
|
|
40 | glEnable (GL_LIGHTING); |
|
|
41 | } |
|
|
42 | |
| 26 | glViewport (0, 0, w, h); |
43 | glViewport (0, 0, w, h); |
| 27 | |
44 | |
| 28 | glMatrixMode (GL_PROJECTION); |
45 | glMatrixMode (GL_PROJECTION); |
| 29 | glLoadIdentity (); |
46 | glLoadIdentity (); |
| 30 | |
47 | |
| 31 | GLdouble aspect = (GLdouble)w/h; |
48 | GLdouble aspect = (GLdouble)w/h; |
| 32 | GLdouble zNear = 0.0001; |
49 | GLdouble zNear = 0.001; |
| 33 | GLdouble zFar = 1000.; |
50 | GLdouble zFar = 100.; |
| 34 | |
51 | |
| 35 | GLdouble ymax = zNear * tan (fov * (M_PI / 360.0)); |
52 | GLdouble ymax = zNear * tan (fov * (M_PI / 360.0)); |
| 36 | glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, zNear, zFar); |
53 | glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, zNear, zFar); |
| 37 | |
54 | |
| 38 | vec3 rz = -d; |
55 | vec3 rz = -d; |
| 39 | vec3 rx = cross (u, rz); |
56 | vec3 rx = cross (u, rz); |
| 40 | vec3 ry = cross (rz, rx); |
57 | vec3 ry = cross (rz, rx); |
| 41 | |
58 | |
| 42 | GLfloat m[4][4]; |
59 | gl_matrix &m = ctx.projection; |
| 43 | m[0][0] = rx.x; m[0][1] = rx.y; m[0][2] = rx.z; m[0][3] = 0; |
60 | m(0,0) = rx.x; m(0,1) = rx.y; m(0,2) = rx.z; m(0,3) = 0; |
| 44 | m[1][0] = ry.x; m[1][1] = ry.y; m[1][2] = ry.z; m[1][3] = 0; |
61 | m(1,0) = ry.x; m(1,1) = ry.y; m(1,2) = ry.z; m(1,3) = 0; |
| 45 | m[2][0] = rz.x; m[2][1] = rz.y; m[2][2] = rz.z; m[2][3] = 0; |
62 | m(2,0) = rz.x; m(2,1) = rz.y; m(2,2) = rz.z; m(2,3) = 0; |
| 46 | m[3][0] = 0; m[3][1] = 0; m[3][2] = 0; m[3][3] = 1; |
63 | m(3,0) = 0; m(3,1) = 0; m(3,2) = 0; m(3,3) = 1; |
|
|
64 | |
| 47 | glMultMatrixf ((GLfloat *)m); |
65 | glMultMatrixf ((GLfloat *)m.data); |
| 48 | glTranslatef (-p.x, -p.y, -p.z); |
|
|
| 49 | |
66 | |
| 50 | glMatrixMode (GL_MODELVIEW); |
67 | glMatrixMode (GL_MODELVIEW); |
| 51 | glLoadIdentity (); |
68 | glLoadIdentity (); |
|
|
69 | glTranslatef (-p.x, -p.y, -p.z); |
| 52 | |
70 | |
| 53 | world.draw (ctx); |
71 | world.draw (ctx); |
| 54 | } |
72 | } |
| 55 | |
73 | |
