From 86464b76e4966afb858c2302559d68cd431bdbfe Mon Sep 17 00:00:00 2001
From: itsmattkc <itsmattkc@gmail.com>
Date: Tue, 22 Jan 2019 20:57:13 +1100
Subject: [PATCH] made tile effect more like sphere effect

---
 effects/tile.frag | 22 +++++++++++++++++++---
 effects/tile.xml  |  8 ++++++--
 2 files changed, 25 insertions(+), 5 deletions(-)

diff --git a/effects/tile.frag b/effects/tile.frag
index c1f48d767..5c076b647 100644
--- a/effects/tile.frag
+++ b/effects/tile.frag
@@ -3,14 +3,16 @@
 varying vec2 vTexCoord;
 uniform sampler2D tex0; // scene buffer
 
-uniform float tilecount;
+uniform float scale;
+uniform float centerx;
+uniform float centery;
 uniform bool mirrorx;
 uniform bool mirrory;
 
 void main(void) {
 	vec2 texCoord = vTexCoord;
 	
-	vec2 coord = vec2(
+	/*vec2 coord = vec2(
 		mod(vTexCoord.x*tilecount, 1.0),
 		mod(vTexCoord.y*tilecount, 1.0)
 	);
@@ -21,7 +23,21 @@ void main(void) {
 	
 	if (mirrory && mod(vTexCoord.y*tilecount, 2.0) > 1.0) {
 		coord.y = 1.0 - coord.y;
+	}*/
+	
+	float adj_scale = scale*0.01;
+	
+	vec2 scaled_coords = (vTexCoord/adj_scale);
+	vec2 coord = scaled_coords-vec2(0.5/adj_scale, 0.5/adj_scale)+vec2(0.5, 0.5)+vec2(-centerx*0.01, -centery*0.01);
+	vec2 modcoord = mod(coord, 1.0);
+	
+	if (mirrorx && mod(coord.x, 2.0) > 1.0) {
+		modcoord.x = 1.0 - modcoord.x;
+	}
+	
+	if (mirrory && mod(coord.y, 2.0) > 1.0) {
+		modcoord.y = 1.0 - modcoord.y;
 	}
 
-	gl_FragColor = vec4(texture2D(tex0, coord));	
+	gl_FragColor = vec4(texture2D(tex0, modcoord));	
 }
\ No newline at end of file
diff --git a/effects/tile.xml b/effects/tile.xml
index d73a6e79e..e002fd65d 100644
--- a/effects/tile.xml
+++ b/effects/tile.xml
@@ -1,7 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <effect name="Tile" category="Distort">
-	<row name="Tile Count">
-		<field type="double" min="1" default="2" id="tilecount"/>
+	<row name="Scale">
+		<field type="double" min="0" default="50" id="scale"/>
+	</row>
+	<row name="Center">
+		<field type="double" default="0" id="centerx"/>
+		<field type="double" default="0" id="centery"/>
 	</row>
 	<row name="Mirror X">
 		<field type="bool" default="0" id="mirrorx"/>