webvr js meetup initial commit

2017-03-11 15:22:17 +01:00
commit 3f640b55db
761 changed files with 264174 additions and 0 deletions
--- a/node_modules/three/examples/js/shaders/EdgeShader.js
+++ b/node_modules/three/examples/js/shaders/EdgeShader.js
@@ -0,0 +1,93 @@
+/**
+ * @author zz85 / https://github.com/zz85 | https://www.lab4games.net/zz85/blog
+ *
+ * Edge Detection Shader using Frei-Chen filter
+ * Based on http://rastergrid.com/blog/2011/01/frei-chen-edge-detector
+ *
+ * aspect: vec2 of (1/width, 1/height)
+ */
+
+THREE.EdgeShader = {
+
+	uniforms: {
+
+		"tDiffuse": { value: null },
+		"aspect":    { value: new THREE.Vector2( 512, 512 ) }
+	},
+
+	vertexShader: [
+
+		"varying vec2 vUv;",
+
+		"void main() {",
+
+			"vUv = uv;",
+			"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
+
+		"}"
+
+	].join( "\n" ),
+
+	fragmentShader: [
+
+		"uniform sampler2D tDiffuse;",
+		"varying vec2 vUv;",
+
+		"uniform vec2 aspect;",
+
+		"vec2 texel = vec2(1.0 / aspect.x, 1.0 / aspect.y);",
+
+
+		"mat3 G[9];",
+
+		// hard coded matrix values!!!! as suggested in https://github.com/neilmendoza/ofxPostProcessing/blob/master/src/EdgePass.cpp#L45
+
+		"const mat3 g0 = mat3( 0.3535533845424652, 0, -0.3535533845424652, 0.5, 0, -0.5, 0.3535533845424652, 0, -0.3535533845424652 );",
+		"const mat3 g1 = mat3( 0.3535533845424652, 0.5, 0.3535533845424652, 0, 0, 0, -0.3535533845424652, -0.5, -0.3535533845424652 );",
+		"const mat3 g2 = mat3( 0, 0.3535533845424652, -0.5, -0.3535533845424652, 0, 0.3535533845424652, 0.5, -0.3535533845424652, 0 );",
+		"const mat3 g3 = mat3( 0.5, -0.3535533845424652, 0, -0.3535533845424652, 0, 0.3535533845424652, 0, 0.3535533845424652, -0.5 );",
+		"const mat3 g4 = mat3( 0, -0.5, 0, 0.5, 0, 0.5, 0, -0.5, 0 );",
+		"const mat3 g5 = mat3( -0.5, 0, 0.5, 0, 0, 0, 0.5, 0, -0.5 );",
+		"const mat3 g6 = mat3( 0.1666666716337204, -0.3333333432674408, 0.1666666716337204, -0.3333333432674408, 0.6666666865348816, -0.3333333432674408, 0.1666666716337204, -0.3333333432674408, 0.1666666716337204 );",
+		"const mat3 g7 = mat3( -0.3333333432674408, 0.1666666716337204, -0.3333333432674408, 0.1666666716337204, 0.6666666865348816, 0.1666666716337204, -0.3333333432674408, 0.1666666716337204, -0.3333333432674408 );",
+		"const mat3 g8 = mat3( 0.3333333432674408, 0.3333333432674408, 0.3333333432674408, 0.3333333432674408, 0.3333333432674408, 0.3333333432674408, 0.3333333432674408, 0.3333333432674408, 0.3333333432674408 );",
+
+		"void main(void)",
+		"{",
+
+			"G[0] = g0,",
+			"G[1] = g1,",
+			"G[2] = g2,",
+			"G[3] = g3,",
+			"G[4] = g4,",
+			"G[5] = g5,",
+			"G[6] = g6,",
+			"G[7] = g7,",
+			"G[8] = g8;",
+
+			"mat3 I;",
+			"float cnv[9];",
+			"vec3 sample;",
+
+			/* fetch the 3x3 neighbourhood and use the RGB vector's length as intensity value */
+			"for (float i=0.0; i<3.0; i++) {",
+				"for (float j=0.0; j<3.0; j++) {",
+					"sample = texture2D(tDiffuse, vUv + texel * vec2(i-1.0,j-1.0) ).rgb;",
+					"I[int(i)][int(j)] = length(sample);",
+				"}",
+			"}",
+
+			/* calculate the convolution values for all the masks */
+			"for (int i=0; i<9; i++) {",
+				"float dp3 = dot(G[i][0], I[0]) + dot(G[i][1], I[1]) + dot(G[i][2], I[2]);",
+				"cnv[i] = dp3 * dp3;",
+			"}",
+
+			"float M = (cnv[0] + cnv[1]) + (cnv[2] + cnv[3]);",
+			"float S = (cnv[4] + cnv[5]) + (cnv[6] + cnv[7]) + (cnv[8] + M);",
+
+			"gl_FragColor = vec4(vec3(sqrt(M/S)), 1.0);",
+		"}"
+
+	].join( "\n" )
+};