Workbench: Shadows: Fix cap being clipped by far plane.

This was the last remaining problem with shadow volumes (that I know of).

Only extrude until we hit the far plane.

1 files changed, 13 insertions, 6 deletions

diff --git a/source/blender/draw/intern/draw_manager_exec.c b/source/blender/draw/intern/draw_manager_exec.c
index cb2cad8a36e..f6b6438395d 100644
--- a/source/blender/draw/intern/draw_manager_exec.c
+++ b/source/blender/draw/intern/draw_manager_exec.c
@@ -516,12 +516,12 @@ static void draw_clipping_setup_from_view(void)
 	for (int p = 0; p < 6; p++) {
 		int q, r;
 		switch (p) {
-			case 0:  q = 1; r = 2; break;
-			case 1:  q = 0; r = 5; break;
-			case 2:  q = 1; r = 5; break;
-			case 3:  q = 2; r = 6; break;
-			case 4:  q = 0; r = 3; break;
-			default: q = 4; r = 7; break;
+			case 0:  q = 1; r = 2; break; /* -X */
+			case 1:  q = 0; r = 5; break; /* -Y */
+			case 2:  q = 1; r = 5; break; /* +Z (far) */
+			case 3:  q = 2; r = 6; break; /* +Y */
+			case 4:  q = 0; r = 3; break; /* -Z (near) */
+			default: q = 4; r = 7; break; /* +X */
 		}
 		if (DST.frontface == GL_CW) {
 			SWAP(int, q, r);
@@ -713,6 +713,13 @@ void DRW_culling_frustum_corners_get(BoundBox *corners)
 	memcpy(corners, &DST.clipping.frustum_corners, sizeof(BoundBox));
 }
 
+/* See draw_clipping_setup_from_view() for the plane order. */
+void DRW_culling_frustum_planes_get(float planes[6][4])
+{
+	draw_clipping_setup_from_view();
+	memcpy(planes, &DST.clipping.frustum_planes, sizeof(DST.clipping.frustum_planes));
+}
+
 /** \} */
 
 /* -------------------------------------------------------------------- */