X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=slice_effect.frag;h=e77c9fad7bf39e38444724d5879df64710f074f4;hp=1598cb034565addd4289be93c4f119771ace62da;hb=a5a795f293fcf84f24ddcebd062a5d433f7be8e4;hpb=74ac64b2e402247edf61271a4862e657da7fe135

diff --git a/slice_effect.frag b/slice_effect.frag
index 1598cb0..e77c9fa 100644
--- a/slice_effect.frag
+++ b/slice_effect.frag
@@ -1,6 +1,7 @@
 uniform float PREFIX(output_coord_to_slice_num);
 uniform float PREFIX(slice_num_to_input_coord);
 uniform float PREFIX(slice_offset_to_input_coord);
+uniform float PREFIX(offset);
  
 vec4 FUNCNAME(vec2 tc) {
 	// DIRECTION_VERTICAL will be #defined to 1 if we are expanding vertically,
@@ -16,7 +17,7 @@ vec4 FUNCNAME(vec2 tc) {
 	float slice_offset = fract(sliced_coord * PREFIX(output_coord_to_slice_num));
 
 	// Find out where this slice begins in the input data, and then offset from that.
-	float input_coord = slice_num * PREFIX(slice_num_to_input_coord) + slice_offset * PREFIX(slice_offset_to_input_coord);
+	float input_coord = slice_num * PREFIX(slice_num_to_input_coord) + slice_offset * PREFIX(slice_offset_to_input_coord) + PREFIX(offset);
 
 #if DIRECTION_VERTICAL
 	return INPUT(vec2(tc.x, 1.0 - input_coord));
@@ -24,3 +25,5 @@ vec4 FUNCNAME(vec2 tc) {
 	return INPUT(vec2(input_coord, tc.y));
 #endif
 }
+
+#undef DIRECTION_VERTICAL