https://github.com/WWBN/AVideo/issues/8713

node_modules/three/examples/js/shaders/TriangleBlurShader.js

@@ -0,0 +1,70 @@
+/**
+ * Triangle blur shader
+ * based on glfx.js triangle blur shader
+ * https://github.com/evanw/glfx.js
+ *
+ * A basic blur filter, which convolves the image with a
+ * pyramid filter. The pyramid filter is separable and is applied as two
+ * perpendicular triangle filters.
+ */
+
+THREE.TriangleBlurShader = {
+
+	uniforms: {
+
+		'texture': { value: null },
+		'delta': { value: new THREE.Vector2( 1, 1 ) }
+
+	},
+
+	vertexShader: [
+
+		'varying vec2 vUv;',
+
+		'void main() {',
+
+		'	vUv = uv;',
+		'	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );',
+
+		'}'
+
+	].join( '\n' ),
+
+	fragmentShader: [
+
+		'#include <common>',
+
+		'#define ITERATIONS 10.0',
+
+		'uniform sampler2D texture;',
+		'uniform vec2 delta;',
+
+		'varying vec2 vUv;',
+
+		'void main() {',
+
+		'	vec4 color = vec4( 0.0 );',
+
+		'	float total = 0.0;',
+
+		// randomize the lookup values to hide the fixed number of samples
+
+		'	float offset = rand( vUv );',
+
+		'	for ( float t = -ITERATIONS; t <= ITERATIONS; t ++ ) {',
+
+		'		float percent = ( t + offset - 0.5 ) / ITERATIONS;',
+		'		float weight = 1.0 - abs( percent );',
+
+		'		color += texture2D( texture, vUv + delta * percent ) * weight;',
+		'		total += weight;',
+
+		'	}',
+
+		'	gl_FragColor = color / total;',
+
+		'}'
+
+	].join( '\n' )
+
+};