| 1 |
#include <cmath> |
| 2 |
|
| 3 |
#include "oct.h" |
| 4 |
#include "view.h" |
| 5 |
|
| 6 |
draw_context::draw_context (view &v) |
| 7 |
: v(v), l(0), mode(LIGHTED) |
| 8 |
{ |
| 9 |
} |
| 10 |
|
| 11 |
draw_context::~draw_context () |
| 12 |
{ |
| 13 |
} |
| 14 |
|
| 15 |
bool draw_context::may_draw (entity_base *e) |
| 16 |
{ |
| 17 |
if (drawn.find (e) != drawn.end ()) |
| 18 |
return false; |
| 19 |
|
| 20 |
drawn.insert (e); |
| 21 |
return true; |
| 22 |
} |
| 23 |
|
| 24 |
void view::draw (draw_context &ctx) |
| 25 |
{ |
| 26 |
// check occlusion queries here |
| 27 |
|
| 28 |
ctx.generation++; |
| 29 |
|
| 30 |
renormalize (orig, p); |
| 31 |
|
| 32 |
if (ctx.mode == draw_context::DEPTH) |
| 33 |
{ |
| 34 |
glEnable (GL_POLYGON_OFFSET_FILL); |
| 35 |
glPolygonOffset (0, 1); |
| 36 |
glDepthFunc (GL_LESS); |
| 37 |
glDisable (GL_LIGHTING); |
| 38 |
glColorMask (0, 0, 0, 0); |
| 39 |
cgGLDisableProfile (CG_PROFILE_ARBVP1); |
| 40 |
cgGLDisableProfile (CG_PROFILE_ARBFP1); |
| 41 |
} |
| 42 |
else |
| 43 |
{ |
| 44 |
glDisable (GL_POLYGON_OFFSET_FILL); |
| 45 |
glDrawBuffer (GL_BACK); |
| 46 |
glDepthFunc (GL_LEQUAL); |
| 47 |
glEnable (GL_LIGHTING); |
| 48 |
glDepthMask (0); |
| 49 |
cgGLEnableProfile (CG_PROFILE_ARBVP1); |
| 50 |
cgGLEnableProfile (CG_PROFILE_ARBFP1); |
| 51 |
} |
| 52 |
|
| 53 |
glViewport (0, 0, w, h); |
| 54 |
|
| 55 |
glMatrixMode (GL_PROJECTION); |
| 56 |
glLoadIdentity (); |
| 57 |
|
| 58 |
GLdouble aspect = (GLdouble)w/h; |
| 59 |
GLdouble zNear = 0.1; |
| 60 |
GLdouble zFar = 50.; |
| 61 |
|
| 62 |
GLdouble ymax = zNear * tan (fov * (M_PI / 360.0)); |
| 63 |
glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, zNear, zFar); |
| 64 |
|
| 65 |
d = normalize (d);//D |
| 66 |
u = normalize (u);//D |
| 67 |
vec3 rz = -d; |
| 68 |
vec3 rx = cross (u, rz); |
| 69 |
vec3 ry = cross (rz, rx); |
| 70 |
|
| 71 |
matrix &m = ctx.projection; |
| 72 |
m(0,0) = rx.x; m(0,1) = rx.y; m(0,2) = rx.z; m(0,3) = -p.x; |
| 73 |
m(1,0) = ry.x; m(1,1) = ry.y; m(1,2) = ry.z; m(1,3) = -p.y; |
| 74 |
m(2,0) = rz.x; m(2,1) = rz.y; m(2,2) = rz.z; m(2,3) = -p.z; |
| 75 |
m(3,0) = 0; m(3,1) = 0; m(3,2) = 0; m(3,3) = 1; |
| 76 |
|
| 77 |
glMultMatrixf ((GLfloat *)m.data); |
| 78 |
|
| 79 |
glGetFloatv (GL_PROJECTION_MATRIX, (GLfloat *)&m); |
| 80 |
|
| 81 |
ctx.frustum.l = plane ( m(3,0) + m(0,0), m(3,1) + m(0,1), m(3,2) + m(0,2), m(3,3) + m(0,3) ); |
| 82 |
ctx.frustum.r = plane ( m(3,0) - m(0,0), m(3,1) - m(0,1), m(3,2) - m(0,2), m(3,3) - m(0,3) ); |
| 83 |
ctx.frustum.b = plane ( m(3,0) + m(1,0), m(3,1) + m(1,1), m(3,2) + m(1,2), m(3,3) + m(1,3) ); |
| 84 |
ctx.frustum.t = plane ( m(3,0) - m(1,0), m(3,1) - m(1,1), m(3,2) - m(1,2), m(3,3) - m(1,3) ); |
| 85 |
ctx.frustum.n = plane ( m(3,0) + m(2,0), m(3,1) + m(2,1), m(3,2) + m(2,2), m(3,3) + m(2,3) ); |
| 86 |
ctx.frustum.f = plane ( m(3,0) - m(2,0), m(3,1) - m(2,1), m(3,2) - m(2,2), m(3,3) - m(2,3) ); |
| 87 |
|
| 88 |
glMatrixMode (GL_MODELVIEW); |
| 89 |
glLoadIdentity (); |
| 90 |
|
| 91 |
world.draw (ctx); |
| 92 |
|
| 93 |
ctx.drawn.clear (); |
| 94 |
|
| 95 |
glColorMask (1, 1, 1, 0); |
| 96 |
glDepthMask (1); |
| 97 |
} |
| 98 |
|
| 99 |
|
