最新代码

public/sdk/three/jsm/shaders/HorizontalBlurShader.js

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+/**
+ * Two pass Gaussian blur filter (horizontal and vertical blur shaders)
+ * - see http://www.cake23.de/traveling-wavefronts-lit-up.html
+ *
+ * - 9 samples per pass
+ * - standard deviation 2.7
+ * - "h" and "v" parameters should be set to "1 / width" and "1 / height"
+ */
+
+const HorizontalBlurShader = {
+
+	name: 'HorizontalBlurShader',
+
+	uniforms: {
+
+		'tDiffuse': { value: null },
+		'h': { value: 1.0 / 512.0 }
+
+	},
+
+	vertexShader: /* glsl */`
+
+		varying vec2 vUv;
+
+		void main() {
+
+			vUv = uv;
+			gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
+
+		}`,
+
+	fragmentShader: /* glsl */`
+
+		uniform sampler2D tDiffuse;
+		uniform float h;
+
+		varying vec2 vUv;
+
+		void main() {
+
+			vec4 sum = vec4( 0.0 );
+
+			sum += texture2D( tDiffuse, vec2( vUv.x - 4.0 * h, vUv.y ) ) * 0.051;
+			sum += texture2D( tDiffuse, vec2( vUv.x - 3.0 * h, vUv.y ) ) * 0.0918;
+			sum += texture2D( tDiffuse, vec2( vUv.x - 2.0 * h, vUv.y ) ) * 0.12245;
+			sum += texture2D( tDiffuse, vec2( vUv.x - 1.0 * h, vUv.y ) ) * 0.1531;
+			sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y ) ) * 0.1633;
+			sum += texture2D( tDiffuse, vec2( vUv.x + 1.0 * h, vUv.y ) ) * 0.1531;
+			sum += texture2D( tDiffuse, vec2( vUv.x + 2.0 * h, vUv.y ) ) * 0.12245;
+			sum += texture2D( tDiffuse, vec2( vUv.x + 3.0 * h, vUv.y ) ) * 0.0918;
+			sum += texture2D( tDiffuse, vec2( vUv.x + 4.0 * h, vUv.y ) ) * 0.051;
+
+			gl_FragColor = sum;
+
+		}`
+
+};
+
+export { HorizontalBlurShader };