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-rw-r--r--progs/demos/arbfslight.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/progs/demos/arbfslight.c b/progs/demos/arbfslight.c
index 69575f0623..39c9226b3d 100644
--- a/progs/demos/arbfslight.c
+++ b/progs/demos/arbfslight.c
@@ -208,7 +208,21 @@ static void Init (void)
" // Compute dot product of light direction and normal vector\n"
" float dotProd = max (dot (lightPos, normalize (normal)), 0.0);\n"
" // Compute diffuse and specular contributions\n"
+#if 0
" gl_FragColor = diffuse * dotProd + specular * pow (dotProd, 20.0);\n"
+#else
+ " if (normal.y > 0.0) { \n"
+ " gl_FragColor = diffuse * dotProd + specular * pow (dotProd, 20.0);\n"
+ " } \n"
+ " else { \n"
+ " if (normal.x < 0.0) { \n"
+ " gl_FragColor = vec4(1, 0, 0, 0); \n"
+ " } \n"
+ " else { \n"
+ " gl_FragColor = vec4(1, 1, 0, 0); \n"
+ " } \n"
+ " } \n"
+#endif
"}\n"
;
static const char *vertShaderText =