diff options
| author | Janne Karhu <jhkarh@gmail.com> | 2011-02-02 15:04:23 +0300 |
|---|---|---|
| committer | Janne Karhu <jhkarh@gmail.com> | 2011-02-02 15:04:23 +0300 |
| commit | f79f9115f2f7d65b767899967aa31bf6218ebdd6 (patch) | |
| tree | 97ac682f8fb71f95377d679928854c7b8acc4983 /source/blender/render | |
| parent | a7af789864b1c9818bb1f3723180a23c594914b0 (diff) | |
Fix for [#25899] Renderer can't trace successive total internal reflection
* This was wrong since 2006!
* Raytrace code assumed refractions to go "air -> glass -> air -> glass -> air.." so actually only the first total internal reflection was calculated correctly, but everything after that was wrong.
* Now after a total internal reflection there needs to be an actual refraction before the ray escapes the "glass" object.
Diffstat (limited to 'source/blender/render')
| -rw-r--r-- | source/blender/render/intern/source/rayshade.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/source/blender/render/intern/source/rayshade.c b/source/blender/render/intern/source/rayshade.c index 1bbf994d505..09c83123ce1 100644 --- a/source/blender/render/intern/source/rayshade.c +++ b/source/blender/render/intern/source/rayshade.c @@ -779,12 +779,18 @@ static void traceray(ShadeInput *origshi, ShadeResult *origshr, short depth, flo norm[0]= - shi.vn[0]; norm[1]= - shi.vn[1]; norm[2]= - shi.vn[2]; - if (!refraction(refract, norm, shi.view, shi.ang)) + if (!refraction(refract, norm, shi.view, shi.ang)) { reflection(refract, norm, shi.view, shi.vn); + /* for total internal reflection the ray stays inside the material, so don't flip the normal (double flip) */ + traflag ^= RAY_TRAFLIP; + } } else { - if (!refraction(refract, shi.vn, shi.view, shi.ang)) + if (!refraction(refract, shi.vn, shi.view, shi.ang)) { reflection(refract, shi.vn, shi.view, shi.vn); + /* same reason as above */ + traflag ^= RAY_TRAFLIP; + } } traflag |= RAY_TRA; traceray(origshi, origshr, depth-1, shi.co, refract, tracol, shi.obi, shi.vlr, traflag ^ RAY_TRAFLIP); |