Fix #20891: opengl animation render could mess up the view.

The problem was that wmPushMatrix/wmOrtho/.. and similar functions did not
work well for offscreen rendering. It would have been possible to make a
fake subwindow for this, but I decided to just remove this extra layer as
it does not seem to have much purpose and has been quite confusing when
trying to fix other bugs. The relevant matrices are already stored in
RegionView3D so there will be no increase in calls to glGetFloat, which may
have been a performance reason to use this system in the past.

1 files changed, 6 insertions, 6 deletions

diff --git a/source/blender/makesdna/DNA_view3d_types.h b/source/blender/makesdna/DNA_view3d_types.h
index 6546ec5747a..6a7f41c891e 100644
--- a/source/blender/makesdna/DNA_view3d_types.h
+++ b/source/blender/makesdna/DNA_view3d_types.h
@@ -77,13 +77,13 @@ typedef struct BGpic {
 
 typedef struct RegionView3D {
 	
-	float winmat[4][4];
-	float viewmat[4][4];
-	float viewinv[4][4];
-	float persmat[4][4];
-	float persinv[4][4];
+	float winmat[4][4];			/* GL_PROJECTION matrix */
+	float viewmat[4][4];		/* GL_MODELVIEW matrix */
+	float viewinv[4][4];		/* inverse of viewmat */
+	float persmat[4][4];		/* viewmat*winmat */
+	float persinv[4][4];		/* inverse of persmat */
 
-	/* local viewmat/persmat, multiplied with object matrix, while drawing */
+	/* viewmat/persmat multiplied with object matrix, while drawing and selection */
 	float viewmatob[4][4];
 	float persmatob[4][4];