[Bf-blender-cvs] [45ec962f68f] blender2.8: DRW: Fix culling with inverted view (planar reflections)

[Clément Foucault]

Commit: 45ec962f68f834bb662e4e25e770f8aa61891e6b
Author: Clément Foucault
Date:   Wed Mar 7 19:03:01 2018 +0100
Branches: blender2.8
https://developer.blender.org/rB45ec962f68f834bb662e4e25e770f8aa61891e6b

DRW: Fix culling with inverted view (planar reflections)

Just invert the frustum planes in this case.

===================================================================

M	source/blender/draw/intern/draw_manager_exec.c

===================================================================

diff --git a/source/blender/draw/intern/draw_manager_exec.c b/source/blender/draw/intern/draw_manager_exec.c
index a984a0b782f..3865bd60817 100644
--- a/source/blender/draw/intern/draw_manager_exec.c
+++ b/source/blender/draw/intern/draw_manager_exec.c
@@ -414,6 +414,9 @@ static void draw_clipping_setup_from_view(void)
 			case 4:  q=0; r=3; break;
 			default: q=4; r=7; break;
 		}
+		if (DST.frontface == GL_CW) {
+			SWAP(int, q, r);
+		}
 
 		normal_tri_v3(DST.clipping.frustum_planes[p], bbox.vec[p], bbox.vec[q], bbox.vec[r]);
 		DST.clipping.frustum_planes[p][3] = -dot_v3v3(DST.clipping.frustum_planes[p], bbox.vec[p]);