1 /**
  2  * @author mikael emtinger / http://gomo.se/
  3  *
  4  */
  5 
  6 /**@namespace*/
  7 THREE.ShaderFlares = {
  8 
  9 	'lensFlareVertexTexture': {
 10 
 11 		vertexShader: [
 12 
 13 			"uniform vec3 screenPosition;",
 14 			"uniform vec2 scale;",
 15 			"uniform float rotation;",
 16 			"uniform int renderType;",
 17 
 18 			"uniform sampler2D occlusionMap;",
 19 
 20 			"attribute vec2 position;",
 21 			"attribute vec2 uv;",
 22 
 23 			"varying vec2 vUV;",
 24 			"varying float vVisibility;",
 25 
 26 			"void main() {",
 27 
 28 				"vUV = uv;",
 29 
 30 				"vec2 pos = position;",
 31 
 32 				"if( renderType == 2 ) {",
 33 
 34 					"vec4 visibility = texture2D( occlusionMap, vec2( 0.1, 0.1 ) ) +",
 35 									  "texture2D( occlusionMap, vec2( 0.5, 0.1 ) ) +",
 36 									  "texture2D( occlusionMap, vec2( 0.9, 0.1 ) ) +",
 37 									  "texture2D( occlusionMap, vec2( 0.9, 0.5 ) ) +",
 38 									  "texture2D( occlusionMap, vec2( 0.9, 0.9 ) ) +",
 39 									  "texture2D( occlusionMap, vec2( 0.5, 0.9 ) ) +",
 40 									  "texture2D( occlusionMap, vec2( 0.1, 0.9 ) ) +",
 41 									  "texture2D( occlusionMap, vec2( 0.1, 0.5 ) ) +",
 42 									  "texture2D( occlusionMap, vec2( 0.5, 0.5 ) );",
 43 
 44 					"vVisibility = (       visibility.r / 9.0 ) *",
 45 								  "( 1.0 - visibility.g / 9.0 ) *",
 46 								  "(       visibility.b / 9.0 ) *",
 47 								  "( 1.0 - visibility.a / 9.0 );",
 48 
 49 					"pos.x = cos( rotation ) * position.x - sin( rotation ) * position.y;",
 50 					"pos.y = sin( rotation ) * position.x + cos( rotation ) * position.y;",
 51 
 52 				"}",
 53 
 54 				"gl_Position = vec4( ( pos * scale + screenPosition.xy ).xy, screenPosition.z, 1.0 );",
 55 
 56 			"}"
 57 
 58 		].join( "\n" ),
 59 
 60 		fragmentShader: [
 61 
 62 			"precision mediump float;",
 63 
 64 			"uniform sampler2D map;",
 65 			"uniform float opacity;",
 66 			"uniform int renderType;",
 67 			"uniform vec3 color;",
 68 
 69 			"varying vec2 vUV;",
 70 			"varying float vVisibility;",
 71 
 72 			"void main() {",
 73 
 74 				// pink square
 75 
 76 				"if( renderType == 0 ) {",
 77 
 78 					"gl_FragColor = vec4( 1.0, 0.0, 1.0, 0.0 );",
 79 
 80 				// restore
 81 
 82 				"} else if( renderType == 1 ) {",
 83 
 84 					"gl_FragColor = texture2D( map, vUV );",
 85 
 86 				// flare
 87 
 88 				"} else {",
 89 
 90 					"vec4 texture = texture2D( map, vUV );",
 91 					"texture.a *= opacity * vVisibility;",
 92 					"gl_FragColor = texture;",
 93 					"gl_FragColor.rgb *= color;",
 94 
 95 				"}",
 96 
 97 			"}"
 98 		].join( "\n" )
 99 
100 	},
101 
102 
103 	'lensFlare': {
104 
105 		vertexShader: [
106 
107 			"uniform vec3 screenPosition;",
108 			"uniform vec2 scale;",
109 			"uniform float rotation;",
110 			"uniform int renderType;",
111 
112 			"attribute vec2 position;",
113 			"attribute vec2 uv;",
114 
115 			"varying vec2 vUV;",
116 
117 			"void main() {",
118 
119 				"vUV = uv;",
120 
121 				"vec2 pos = position;",
122 
123 				"if( renderType == 2 ) {",
124 
125 					"pos.x = cos( rotation ) * position.x - sin( rotation ) * position.y;",
126 					"pos.y = sin( rotation ) * position.x + cos( rotation ) * position.y;",
127 
128 				"}",
129 
130 				"gl_Position = vec4( ( pos * scale + screenPosition.xy ).xy, screenPosition.z, 1.0 );",
131 
132 			"}"
133 
134 		].join( "\n" ),
135 
136 		fragmentShader: [
137 
138 			"precision mediump float;",
139 
140 			"uniform sampler2D map;",
141 			"uniform sampler2D occlusionMap;",
142 			"uniform float opacity;",
143 			"uniform int renderType;",
144 			"uniform vec3 color;",
145 
146 			"varying vec2 vUV;",
147 
148 			"void main() {",
149 
150 				// pink square
151 
152 				"if( renderType == 0 ) {",
153 
154 					"gl_FragColor = vec4( texture2D( map, vUV ).rgb, 0.0 );",
155 
156 				// restore
157 
158 				"} else if( renderType == 1 ) {",
159 
160 					"gl_FragColor = texture2D( map, vUV );",
161 
162 				// flare
163 
164 				"} else {",
165 
166 					"float visibility = texture2D( occlusionMap, vec2( 0.5, 0.1 ) ).a +",
167 									   "texture2D( occlusionMap, vec2( 0.9, 0.5 ) ).a +",
168 									   "texture2D( occlusionMap, vec2( 0.5, 0.9 ) ).a +",
169 									   "texture2D( occlusionMap, vec2( 0.1, 0.5 ) ).a;",
170 
171 					"visibility = ( 1.0 - visibility / 4.0 );",
172 
173 					"vec4 texture = texture2D( map, vUV );",
174 					"texture.a *= opacity * visibility;",
175 					"gl_FragColor = texture;",
176 					"gl_FragColor.rgb *= color;",
177 
178 				"}",
179 
180 			"}"
181 
182 		].join( "\n" )
183 
184 	}
185 
186 };
187 

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