From bbdef72e69e9ba6efdbb41af502d294281fc29ed Mon Sep 17 00:00:00 2001
From: alteredq <postfilter@gmail.com>
Date: Sat, 24 Sep 2011 02:40:14 +0200
Subject: [PATCH] Added simple tilt-shift effect to ShaderExtras.

---
 examples/js/ShaderExtras.js | 121 ++++++++++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)

diff --git a/examples/js/ShaderExtras.js b/examples/js/ShaderExtras.js
index 5f3479c1..a101afe3 100644
--- a/examples/js/ShaderExtras.js
+++ b/examples/js/ShaderExtras.js
@@ -962,6 +962,127 @@ THREE.ShaderExtras = {
 
 	},
 
+	/* --------------------------------------------------------------------------------------------------
+	//	Simple fake tilt-shift effect, modulating two pass Gaussian blur (see above) by vertical position
+	//
+	//	- 9 samples per pass
+	//	- standard deviation 2.7
+	//	- "h" and "v" parameters should be set to "1 / width" and "1 / height"
+	//	- "r" parameter control where "focused" horizontal line lies
+	 -------------------------------------------------------------------------------------------------- */
+
+	'horizontalTiltShift': {
+
+		uniforms: {
+
+			"tDiffuse": { type: "t", value: 0, texture: null },
+			"h": 		{ type: "f", value: 1.0 / 512.0 },
+			"r": 		{ type: "f", value: 0.35 }
+
+		},
+
+		vertexShader: [
+
+			"varying vec2 vUv;",
+
+			"void main() {",
+
+				"vUv = vec2( uv.x, 1.0 - uv.y );",
+				"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
+
+			"}"
+
+		].join("\n"),
+
+		fragmentShader: [
+
+			"uniform sampler2D tDiffuse;",
+			"uniform float h;",
+			"uniform float r;",
+
+			"varying vec2 vUv;",
+
+			"void main() {",
+
+				"vec4 sum = vec4( 0.0 );",
+
+				"float hh = h * abs( r - vUv.y );",
+
+				"sum += texture2D( tDiffuse, vec2( vUv.x - 4.0 * hh, vUv.y ) ) * 0.051;",
+				"sum += texture2D( tDiffuse, vec2( vUv.x - 3.0 * hh, vUv.y ) ) * 0.0918;",
+				"sum += texture2D( tDiffuse, vec2( vUv.x - 2.0 * hh, vUv.y ) ) * 0.12245;",
+				"sum += texture2D( tDiffuse, vec2( vUv.x - 1.0 * hh, vUv.y ) ) * 0.1531;",
+				"sum += texture2D( tDiffuse, vec2( vUv.x, 		  	 vUv.y ) ) * 0.1633;",
+				"sum += texture2D( tDiffuse, vec2( vUv.x + 1.0 * hh, vUv.y ) ) * 0.1531;",
+				"sum += texture2D( tDiffuse, vec2( vUv.x + 2.0 * hh, vUv.y ) ) * 0.12245;",
+				"sum += texture2D( tDiffuse, vec2( vUv.x + 3.0 * hh, vUv.y ) ) * 0.0918;",
+				"sum += texture2D( tDiffuse, vec2( vUv.x + 4.0 * hh, vUv.y ) ) * 0.051;",
+
+				"gl_FragColor = sum;",
+
+			"}"
+
+
+		].join("\n")
+
+	},
+
+	'verticalTiltShift': {
+
+		uniforms: {
+
+			"tDiffuse": { type: "t", value: 0, texture: null },
+			"v": 		{ type: "f", value: 1.0 / 512.0 },
+			"r": 		{ type: "f", value: 0.35 }
+
+		},
+
+		vertexShader: [
+
+			"varying vec2 vUv;",
+
+			"void main() {",
+
+				"vUv = vec2( uv.x, 1.0 - uv.y );",
+				"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
+
+			"}"
+
+		].join("\n"),
+
+		fragmentShader: [
+
+			"uniform sampler2D tDiffuse;",
+			"uniform float v;",
+			"uniform float r;",
+
+			"varying vec2 vUv;",
+
+			"void main() {",
+
+				"vec4 sum = vec4( 0.0 );",
+
+				"float vv = v * abs( r - vUv.y );",
+
+				"sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y - 4.0 * vv ) ) * 0.051;",
+				"sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y - 3.0 * vv ) ) * 0.0918;",
+				"sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y - 2.0 * vv ) ) * 0.12245;",
+				"sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y - 1.0 * vv ) ) * 0.1531;",
+				"sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y			   ) ) * 0.1633;",
+				"sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y + 1.0 * vv ) ) * 0.1531;",
+				"sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y + 2.0 * vv ) ) * 0.12245;",
+				"sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y + 3.0 * vv ) ) * 0.0918;",
+				"sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y + 4.0 * vv ) ) * 0.051;",
+
+				"gl_FragColor = sum;",
+
+			"}"
+
+
+		].join("\n")
+
+	},
+
 	// METHODS
 
 	buildKernel: function( sigma ) {