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hecomi · Sep 10, 2017 · 9d8092e · 9d8092e
1 parent 9affcb6
commit 9d8092e
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/Assets/uHomography/Sahders/Homography.shader b/Assets/uHomography/Sahders/Homography.shader
@@ -57,7 +57,11 @@ v2f_homography vert_homography(appdata_homography v)
 	float s =  _Homography[6] * p.x + _Homography[7] * p.y + _Homography[8];
 	float x = (_Homography[0] * p.x + _Homography[1] * p.y + _Homography[2]) / s;
 	float y = (_Homography[3] * p.x + _Homography[4] * p.y + _Homography[5]) / s;
+#if UNITY_UV_STARTS_AT_TOP
+	o.vertex = float4(2 * (x - 0.5), 2 * (0.5 - y), 0, 1);
+#else
 	o.vertex = float4(2 * (x - 0.5), 2 * (y - 0.5), 0, 1);
+#endif
 	o.screenPos = float2(o.vertex.x, o.vertex.y);
 
 	return o;
@@ -66,6 +70,9 @@ v2f_homography vert_homography(appdata_homography v)
 fixed4 frag_homography(v2f_homography i) : SV_Target
 {
 	float2 p = (i.screenPos + 1.0) * 0.5;
+#if UNITY_UV_STARTS_AT_TOP
+    p.y = 1 - p.y;
+#endif
 	float s =  _InvHomography[6] * p.x + _InvHomography[7] * p.y + _InvHomography[8];
 	float u = (_InvHomography[0] * p.x + _InvHomography[1] * p.y + _InvHomography[2]) / s;
 	float v = (_InvHomography[3] * p.x + _InvHomography[4] * p.y + _InvHomography[5]) / s;