ngx-acuw
Version:
Angular components using WEBGL (threejs)
182 lines (147 loc) • 13.5 kB
JavaScript
export class Shaders {
constructor() {
this.particleVertex = `
// @author brunoimbrizi / http://brunoimbrizi.com
precision highp float;
attribute float pindex;
attribute vec3 position;
attribute vec3 offset;
attribute vec2 uv;
attribute float angle;
uniform mat4 modelViewMatrix;
uniform mat4 projectionMatrix;
uniform float uTime;
uniform float uRandom;
uniform float uDepth;
uniform float uSize;
uniform vec2 uTextureSize;
uniform sampler2D uTexture;
uniform sampler2D uTouch;
varying vec2 vPUv;
varying vec2 vUv;
//
// Description : Array and textureless GLSL 2D simplex noise function.
// Author : Ian McEwan, Ashima Arts.
// Maintainer : ijm
// Lastmod : 20110822 (ijm)
// License : Copyright (C) 2011 Ashima Arts. All rights reserved.
// Distributed under the MIT License. See LICENSE file.
// https://github.com/ashima/webgl-noise
//
vec3 mod289_1_0(vec3 x) {
return x - floor(x * (1.0 / 289.0)) * 289.0;
}
vec2 mod289_1_0(vec2 x) {
return x - floor(x * (1.0 / 289.0)) * 289.0;
}
vec3 permute_1_1(vec3 x) {
return mod289_1_0(((x*34.0)+1.0)*x);
}
float snoise_1_2(vec2 v)
{
const vec4 C = vec4(0.211324865405187, // (3.0-sqrt(3.0))/6.0
0.366025403784439, // 0.5*(sqrt(3.0)-1.0)
-0.577350269189626, // -1.0 + 2.0 * C.x
0.024390243902439); // 1.0 / 41.0
// First corner
vec2 i = floor(v + dot(v, C.yy) );
vec2 x0 = v - i + dot(i, C.xx);
// Other corners
vec2 i1;
//i1.x = step( x0.y, x0.x ); // x0.x > x0.y ? 1.0 : 0.0
//i1.y = 1.0 - i1.x;
i1 = (x0.x > x0.y) ? vec2(1.0, 0.0) : vec2(0.0, 1.0);
// x0 = x0 - 0.0 + 0.0 * C.xx ;
// x1 = x0 - i1 + 1.0 * C.xx ;
// x2 = x0 - 1.0 + 2.0 * C.xx ;
vec4 x12 = x0.xyxy + C.xxzz;
x12.xy -= i1;
// Permutations
i = mod289_1_0(i); // Avoid truncation effects in permutation
vec3 p = permute_1_1( permute_1_1( i.y + vec3(0.0, i1.y, 1.0 ))
+ i.x + vec3(0.0, i1.x, 1.0 ));
vec3 m = max(0.5 - vec3(dot(x0,x0), dot(x12.xy,x12.xy), dot(x12.zw,x12.zw)), 0.0);
m = m*m ;
m = m*m ;
// Gradients: 41 points uniformly over a line, mapped onto a diamond.
// The ring size 17*17 = 289 is close to a multiple of 41 (41*7 = 287)
vec3 x = 2.0 * fract(p * C.www) - 1.0;
vec3 h = abs(x) - 0.5;
vec3 ox = floor(x + 0.5);
vec3 a0 = x - ox;
// Normalise gradients implicitly by scaling m
// Approximation of: m *= inversesqrt( a0*a0 + h*h );
m *= 1.79284291400159 - 0.85373472095314 * ( a0*a0 + h*h );
// Compute final noise value at P
vec3 g;
g.x = a0.x * x0.x + h.x * x0.y;
g.yz = a0.yz * x12.xz + h.yz * x12.yw;
return 130.0 * dot(m, g);
}
float random(float n) {
return fract(sin(n) * 43758.5453123);
}
void main() {
vUv = uv;
// particle uv
vec2 puv = offset.xy / uTextureSize;
vPUv = puv;
// pixel color
vec4 colA = texture2D(uTexture, puv);
float grey = colA.r * 0.21 + colA.g * 0.71 + colA.b * 0.07;
// displacement
vec3 displaced = offset;
// randomise
displaced.xy += vec2(random(pindex) - 0.5, random(offset.x + pindex) - 0.5) * uRandom;
float rndz = (random(pindex) + snoise_1_2(vec2(pindex * 0.1, uTime * 0.1)));
displaced.z += rndz * (random(pindex) * 2.0 * uDepth);
// center
displaced.xy -= uTextureSize * 0.5;
// touch
float t = texture2D(uTouch, puv).r;
displaced.z += t * 20.0 * rndz;
displaced.x += cos(angle) * t * 20.0 * rndz;
displaced.y += sin(angle) * t * 20.0 * rndz;
// particle size
float psize = (snoise_1_2(vec2(uTime, pindex) * 0.5) + 2.0);
psize *= max(grey, 0.2);
psize *= uSize;
// final position
vec4 mvPosition = modelViewMatrix * vec4(displaced, 1.0);
mvPosition.xyz += position * psize;
vec4 finalPosition = projectionMatrix * mvPosition;
gl_Position = finalPosition;
}
`;
this.particleFragment = `
// @author brunoimbrizi / http://brunoimbrizi.com
precision highp float;
uniform sampler2D uTexture;
varying vec2 vPUv;
varying vec2 vUv;
void main() {
vec4 color = vec4(0.0);
vec2 uv = vUv;
vec2 puv = vPUv;
// pixel color
vec4 colA = texture2D(uTexture, puv);
// greyscale
float grey = colA.r * 0.21 + colA.g * 0.71 + colA.b * 0.07;
//vec4 colB = vec4(grey, grey, grey, 1.0);
vec4 colB = vec4(colA.r, colA.g, colA.b, 1.0);
// circle
float border = 0.3;
float radius = 0.5;
float dist = radius - distance(uv, vec2(0.5));
float t = smoothstep(0.0, border, dist);
// final color
color = colB;
color.a = t;
gl_FragColor = color;
}
`;
}
}
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All rights reserved.\r\n    //               Distributed under the MIT License. See LICENSE file.\r\n    //               https://github.com/ashima/webgl-noise\r\n    //\r\n\r\n    vec3 mod289_1_0(vec3 x) {\r\n      return x - floor(x * (1.0 / 289.0)) * 289.0;\r\n    }\r\n\r\n    vec2 mod289_1_0(vec2 x) {\r\n      return x - floor(x * (1.0 / 289.0)) * 289.0;\r\n    }\r\n\r\n    vec3 permute_1_1(vec3 x) {\r\n      return mod289_1_0(((x*34.0)+1.0)*x);\r\n    }\r\n\r\n    float snoise_1_2(vec2 v)\r\n      {\r\n      const vec4 C = vec4(0.211324865405187,  // (3.0-sqrt(3.0))/6.0\r\n                          0.366025403784439,  // 0.5*(sqrt(3.0)-1.0)\r\n                         -0.577350269189626,  // -1.0 + 2.0 * C.x\r\n                          0.024390243902439); // 1.0 / 41.0\r\n    // First corner\r\n      vec2 i  = floor(v + dot(v, C.yy) );\r\n      vec2 x0 = v -   i + dot(i, C.xx);\r\n\r\n    // Other corners\r\n      vec2 i1;\r\n      //i1.x = step( x0.y, x0.x ); // x0.x > x0.y ? 1.0 : 0.0\r\n      //i1.y = 1.0 - i1.x;\r\n      i1 = (x0.x > x0.y) ? vec2(1.0, 0.0) : vec2(0.0, 1.0);\r\n      // x0 = x0 - 0.0 + 0.0 * C.xx ;\r\n      // x1 = x0 - i1 + 1.0 * C.xx ;\r\n      // x2 = x0 - 1.0 + 2.0 * C.xx ;\r\n      vec4 x12 = x0.xyxy + C.xxzz;\r\n      x12.xy -= i1;\r\n\r\n     // Permutations\r\n      i = mod289_1_0(i); // Avoid truncation effects in permutation\r\n      vec3 p = permute_1_1( permute_1_1( i.y + vec3(0.0, i1.y, 1.0 ))\r\n        + i.x + vec3(0.0, i1.x, 1.0 ));\r\n\r\n      vec3 m = max(0.5 - vec3(dot(x0,x0), dot(x12.xy,x12.xy), dot(x12.zw,x12.zw)), 0.0);\r\n      m = m*m ;\r\n      m = m*m ;\r\n\r\n    // Gradients: 41 points uniformly over a line, mapped onto a diamond.\r\n    // The ring size 17*17 = 289 is close to a multiple of 41 (41*7 = 287)\r\n\r\n      vec3 x = 2.0 * fract(p * C.www) - 1.0;\r\n      vec3 h = abs(x) - 0.5;\r\n      vec3 ox = floor(x + 0.5);\r\n      vec3 a0 = x - ox;\r\n\r\n    // Normalise gradients implicitly by scaling m\r\n    // Approximation of: m *= inversesqrt( a0*a0 + h*h );\r\n      m *= 1.79284291400159 - 0.85373472095314 * ( a0*a0 + h*h );\r\n\r\n    // Compute final noise value at P\r\n      vec3 g;\r\n      g.x  = a0.x  * x0.x  + h.x  * x0.y;\r\n      g.yz = a0.yz * x12.xz + h.yz * x12.yw;\r\n      return 130.0 * dot(m, g);\r\n    }\r\n\r\n    float random(float n) {\r\n      return fract(sin(n) * 43758.5453123);\r\n    }\r\n\r\n    void main() {\r\n      vUv = uv;\r\n\r\n      // particle uv\r\n      vec2 puv = offset.xy / uTextureSize;\r\n      vPUv = puv;\r\n\r\n      // pixel color\r\n      vec4 colA = texture2D(uTexture, puv);\r\n      float grey = colA.r * 0.21 + colA.g * 0.71 + colA.b * 0.07;\r\n\r\n      // displacement\r\n      vec3 displaced = offset;\r\n      // randomise\r\n      displaced.xy += vec2(random(pindex) - 0.5, random(offset.x + pindex) - 0.5) * uRandom;\r\n      float rndz = (random(pindex) + snoise_1_2(vec2(pindex * 0.1, uTime * 0.1)));\r\n      displaced.z += rndz * (random(pindex) * 2.0 * uDepth);\r\n      // center\r\n      displaced.xy -= uTextureSize * 0.5;\r\n\r\n      // touch\r\n      float t = texture2D(uTouch, puv).r;\r\n      displaced.z += t * 20.0 * rndz;\r\n      displaced.x += cos(angle) * t * 20.0 * rndz;\r\n      displaced.y += sin(angle) * t * 20.0 * rndz;\r\n\r\n      // particle size\r\n      float psize = (snoise_1_2(vec2(uTime, pindex) * 0.5) + 2.0);\r\n      psize *= max(grey, 0.2);\r\n      psize *= uSize;\r\n\r\n      // final position\r\n      vec4 mvPosition = modelViewMatrix * vec4(displaced, 1.0);\r\n      mvPosition.xyz += position * psize;\r\n      vec4 finalPosition = projectionMatrix * mvPosition;\r\n\r\n      gl_Position = finalPosition;\r\n    }\r\n    `;\r\n\r\n    particleFragment = `\r\n    // @author brunoimbrizi / http://brunoimbrizi.com\r\n\r\n    precision highp float;\r\n    #define GLSLIFY 1\r\n\r\n    uniform sampler2D uTexture;\r\n\r\n    varying vec2 vPUv;\r\n    varying vec2 vUv;\r\n\r\n    void main() {\r\n      vec4 color = vec4(0.0);\r\n      vec2 uv = vUv;\r\n      vec2 puv = vPUv;\r\n\r\n      // pixel color\r\n      vec4 colA = texture2D(uTexture, puv);\r\n\r\n      // greyscale\r\n      float grey = colA.r * 0.21 + colA.g * 0.71 + colA.b * 0.07;\r\n      //vec4 colB = vec4(grey, grey, grey, 1.0);\r\n      vec4 colB = vec4(colA.r, colA.g, colA.b, 1.0);\r\n\r\n      // circle\r\n      float border = 0.3;\r\n      float radius = 0.5;\r\n      float dist = radius - distance(uv, vec2(0.5));\r\n      float t = smoothstep(0.0, border, dist);\r\n\r\n      // final color\r\n      color = colB;\r\n      color.a = t;\r\n\r\n      gl_FragColor = color;\r\n    }\r\n    `;\r\n}\r\n"]}