GPU Buffers:

This commit begins implementation of the idea about hidden face
separation outlined in

http://code.blender.org/2015/06/optimizing-blenders-real-time-mesh-

We split hidden and visible faces to different parts of the triangle
buffer.
Mapped drawing will now skip iterating through hidden polys.
Of course the final target, when all derived mesh types use
VBO sorting, is to skip checking for hide flag per face
completely. All faces will be pre-sorted anyway and we'll
be able to draw them with one draw call.

1 files changed, 2 insertions, 2 deletions

diff --git a/source/blender/editors/space_view3d/drawmesh.c b/source/blender/editors/space_view3d/drawmesh.c
index ea1e3178bd0..6085f0c4483 100644
--- a/source/blender/editors/space_view3d/drawmesh.c
+++ b/source/blender/editors/space_view3d/drawmesh.c
@@ -194,7 +194,7 @@ void draw_mesh_face_select(RegionView3D *rv3d, Mesh *me, DerivedMesh *dm, bool d
 		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 		/* dull unselected faces so as not to get in the way of seeing color */
 		glColor4ub(96, 96, 96, 64);
-		dm->drawMappedFaces(dm, draw_mesh_face_select__drawFaceOptsInv, NULL, NULL, (void *)me, 0);
+		dm->drawMappedFaces(dm, draw_mesh_face_select__drawFaceOptsInv, NULL, NULL, (void *)me, DM_DRAW_SKIP_HIDDEN);
 		glDisable(GL_BLEND);
 	}
 	
@@ -959,7 +959,7 @@ static void draw_mesh_textured_old(Scene *scene, View3D *v3d, RegionView3D *rv3d
 	else if (draw_flags & DRAW_FACE_SELECT) {
 		if (ob->mode & OB_MODE_WEIGHT_PAINT)
 			dm->drawMappedFaces(dm, wpaint__setSolidDrawOptions_facemask, GPU_enable_material, NULL, me,
-			                    DM_DRAW_USE_COLORS | DM_DRAW_ALWAYS_SMOOTH);
+			                    DM_DRAW_USE_COLORS | DM_DRAW_ALWAYS_SMOOTH | DM_DRAW_SKIP_HIDDEN);
 		else {
 			drawTFace_userData userData;