LensFlarePlugin: Simplify code

This commit removes the MAX_VERTEX_TEXTURE_IMAGE_UNITS === 0 code path.

src/renderers/webgl/plugins/LensFlarePlugin.js

@@ -9,8 +9,7 @@ THREE.LensFlarePlugin = function ( renderer, flares ) {
 	var state = renderer.state;
 
 	var vertexBuffer, elementBuffer;
-	var program, attributes, uniforms;
-	var hasVertexTexture;
+	var shader, program, attributes, uniforms;
 
 	var tempTexture, occlusionTexture;
 
@@ -58,193 +57,99 @@ THREE.LensFlarePlugin = function ( renderer, flares ) {
 		gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST );
 		gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST );
 
-		hasVertexTexture = gl.getParameter( gl.MAX_VERTEX_TEXTURE_IMAGE_UNITS ) > 0;
+		shader = {
 
-		var shader;
+			vertexShader: [
 
-		if ( hasVertexTexture ) {
+				"uniform lowp int renderType;",
 
-			shader = {
+				"uniform vec3 screenPosition;",
+				"uniform vec2 scale;",
+				"uniform float rotation;",
 
-				vertexShader: [
+				"uniform sampler2D occlusionMap;",
 
-					"uniform lowp int renderType;",
+				"attribute vec2 position;",
+				"attribute vec2 uv;",
 
-					"uniform vec3 screenPosition;",
-					"uniform vec2 scale;",
-					"uniform float rotation;",
+				"varying vec2 vUV;",
+				"varying float vVisibility;",
 
-					"uniform sampler2D occlusionMap;",
+				"void main() {",
 
-					"attribute vec2 position;",
-					"attribute vec2 uv;",
+					"vUV = uv;",
 
-					"varying vec2 vUV;",
-					"varying float vVisibility;",
+					"vec2 pos = position;",
 
-					"void main() {",
+					"if ( renderType == 2 ) {",
 
-						"vUV = uv;",
+						"vec4 visibility = texture2D( occlusionMap, vec2( 0.1, 0.1 ) );",
+						"visibility += texture2D( occlusionMap, vec2( 0.5, 0.1 ) );",
+						"visibility += texture2D( occlusionMap, vec2( 0.9, 0.1 ) );",
+						"visibility += texture2D( occlusionMap, vec2( 0.9, 0.5 ) );",
+						"visibility += texture2D( occlusionMap, vec2( 0.9, 0.9 ) );",
+						"visibility += texture2D( occlusionMap, vec2( 0.5, 0.9 ) );",
+						"visibility += texture2D( occlusionMap, vec2( 0.1, 0.9 ) );",
+						"visibility += texture2D( occlusionMap, vec2( 0.1, 0.5 ) );",
+						"visibility += texture2D( occlusionMap, vec2( 0.5, 0.5 ) );",
 
-						"vec2 pos = position;",
+						"vVisibility =        visibility.r / 9.0;",
+						"vVisibility *= 1.0 - visibility.g / 9.0;",
+						"vVisibility *=       visibility.b / 9.0;",
+						"vVisibility *= 1.0 - visibility.a / 9.0;",
 
-						"if ( renderType == 2 ) {",
+						"pos.x = cos( rotation ) * position.x - sin( rotation ) * position.y;",
+						"pos.y = sin( rotation ) * position.x + cos( rotation ) * position.y;",
 
-							"vec4 visibility = texture2D( occlusionMap, vec2( 0.1, 0.1 ) );",
-							"visibility += texture2D( occlusionMap, vec2( 0.5, 0.1 ) );",
-							"visibility += texture2D( occlusionMap, vec2( 0.9, 0.1 ) );",
-							"visibility += texture2D( occlusionMap, vec2( 0.9, 0.5 ) );",
-							"visibility += texture2D( occlusionMap, vec2( 0.9, 0.9 ) );",
-							"visibility += texture2D( occlusionMap, vec2( 0.5, 0.9 ) );",
-							"visibility += texture2D( occlusionMap, vec2( 0.1, 0.9 ) );",
-							"visibility += texture2D( occlusionMap, vec2( 0.1, 0.5 ) );",
-							"visibility += texture2D( occlusionMap, vec2( 0.5, 0.5 ) );",
+					"}",
 
-							"vVisibility =        visibility.r / 9.0;",
-							"vVisibility *= 1.0 - visibility.g / 9.0;",
-							"vVisibility *=       visibility.b / 9.0;",
-							"vVisibility *= 1.0 - visibility.a / 9.0;",
+					"gl_Position = vec4( ( pos * scale + screenPosition.xy ).xy, screenPosition.z, 1.0 );",
 
-							"pos.x = cos( rotation ) * position.x - sin( rotation ) * position.y;",
-							"pos.y = sin( rotation ) * position.x + cos( rotation ) * position.y;",
+				"}"
 
-						"}",
+			].join( "\n" ),
 
-						"gl_Position = vec4( ( pos * scale + screenPosition.xy ).xy, screenPosition.z, 1.0 );",
+			fragmentShader: [
 
-					"}"
+				"uniform lowp int renderType;",
 
-				].join( "\n" ),
+				"uniform sampler2D map;",
+				"uniform float opacity;",
+				"uniform vec3 color;",
 
-				fragmentShader: [
+				"varying vec2 vUV;",
+				"varying float vVisibility;",
 
-					"uniform lowp int renderType;",
+				"void main() {",
 
-					"uniform sampler2D map;",
-					"uniform float opacity;",
-					"uniform vec3 color;",
+					// pink square
 
-					"varying vec2 vUV;",
-					"varying float vVisibility;",
+					"if ( renderType == 0 ) {",
 
-					"void main() {",
+						"gl_FragColor = vec4( 1.0, 0.0, 1.0, 0.0 );",
 
-						// pink square
+					// restore
 
-						"if ( renderType == 0 ) {",
+					"} else if ( renderType == 1 ) {",
 
-							"gl_FragColor = vec4( 1.0, 0.0, 1.0, 0.0 );",
+						"gl_FragColor = texture2D( map, vUV );",
 
-						// restore
+					// flare
 
-						"} else if ( renderType == 1 ) {",
+					"} else {",
 
-							"gl_FragColor = texture2D( map, vUV );",
+						"vec4 texture = texture2D( map, vUV );",
+						"texture.a *= opacity * vVisibility;",
+						"gl_FragColor = texture;",
+						"gl_FragColor.rgb *= color;",
 
-						// flare
+					"}",
 
-						"} else {",
+				"}"
 
-							"vec4 texture = texture2D( map, vUV );",
-							"texture.a *= opacity * vVisibility;",
-							"gl_FragColor = texture;",
-							"gl_FragColor.rgb *= color;",
+			].join( "\n" )
 
-						"}",
-
-					"}"
-
-				].join( "\n" )
-
-			};
-
-		} else {
-
-			shader = {
-
-				vertexShader: [
-
-					"uniform lowp int renderType;",
-
-					"uniform vec3 screenPosition;",
-					"uniform vec2 scale;",
-					"uniform float rotation;",
-
-					"attribute vec2 position;",
-					"attribute vec2 uv;",
-
-					"varying vec2 vUV;",
-
-					"void main() {",
-
-						"vUV = uv;",
-
-						"vec2 pos = position;",
-
-						"if ( renderType == 2 ) {",
-
-							"pos.x = cos( rotation ) * position.x - sin( rotation ) * position.y;",
-							"pos.y = sin( rotation ) * position.x + cos( rotation ) * position.y;",
-
-						"}",
-
-						"gl_Position = vec4( ( pos * scale + screenPosition.xy ).xy, screenPosition.z, 1.0 );",
-
-					"}"
-
-				].join( "\n" ),
-
-				fragmentShader: [
-
-					"precision mediump float;",
-
-					"uniform lowp int renderType;",
-
-					"uniform sampler2D map;",
-					"uniform sampler2D occlusionMap;",
-					"uniform float opacity;",
-					"uniform vec3 color;",
-
-					"varying vec2 vUV;",
-
-					"void main() {",
-
-						// pink square
-
-						"if ( renderType == 0 ) {",
-
-							"gl_FragColor = vec4( texture2D( map, vUV ).rgb, 0.0 );",
-
-						// restore
-
-						"} else if ( renderType == 1 ) {",
-
-							"gl_FragColor = texture2D( map, vUV );",
-
-						// flare
-
-						"} else {",
-
-							"float visibility = texture2D( occlusionMap, vec2( 0.5, 0.1 ) ).a;",
-							"visibility += texture2D( occlusionMap, vec2( 0.9, 0.5 ) ).a;",
-							"visibility += texture2D( occlusionMap, vec2( 0.5, 0.9 ) ).a;",
-							"visibility += texture2D( occlusionMap, vec2( 0.1, 0.5 ) ).a;",
-							"visibility = ( 1.0 - visibility / 4.0 );",
-
-							"vec4 texture = texture2D( map, vUV );",
-							"texture.a *= opacity * visibility;",
-							"gl_FragColor = texture;",
-							"gl_FragColor.rgb *= color;",
-
-						"}",
-
-					"}"
-
-				].join( "\n" )
-
-			};
-
-		}
+		};
 
 		program = createProgram( shader );