X-Git-Url: http://pileus.org/git/?p=grits;a=blobdiff_plain;f=src%2Fopengl.c;h=e9d4a7e3a0a6d44ea35d6f361e4b8ec1f4db4f8d;hp=43fd022864f98d7de882d36048f18f886898fb9b;hb=f230908a4780fd954772bbc3d17658aba86baea8;hpb=cc88970c4a849c32ca7555e318092266529233c8

diff --git a/src/opengl.c b/src/opengl.c
index 43fd022..e9d4a7e 100644
--- a/src/opengl.c
+++ b/src/opengl.c
@@ -54,6 +54,12 @@ static gboolean configure_start(GtkWidget *da, GdkEventConfigure *event, gpointe
 	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 	glClearColor(0.8f, 0.8f, 1.0f, 0.0f);
 
+	/* Tessellation, "finding intersecting triangles" */
+	/* http://research.microsoft.com/pubs/70307/tr-2006-81.pdf */
+	/* http://www.opengl.org/wiki/Alpha_Blending */
+	glAlphaFunc(GL_GREATER,0.1);
+	glEnable(GL_ALPHA_TEST);
+
 	/* Depth test */
 	glClearDepth(1.0);
 	glDepthFunc(GL_LEQUAL);