You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
71 lines
1.2 KiB
71 lines
1.2 KiB
6 months ago
|
import {
|
||
|
|
Vector2
|
||
|
|
} from 'three';
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Dot screen shader
|
||
|
|
* based on glfx.js sepia shader
|
||
|
|
* https://github.com/evanw/glfx.js
|
||
|
|
*/
|
||
|
|
|
||
|
|
const DotScreenShader = {
|
||
|
|
|
||
|
|
name: 'DotScreenShader',
|
||
|
|
|
||
|
|
uniforms: {
|
||
|
|
|
||
|
|
'tDiffuse': { value: null },
|
||
|
|
'tSize': { value: new Vector2( 256, 256 ) },
|
||
|
|
'center': { value: new Vector2( 0.5, 0.5 ) },
|
||
|
|
'angle': { value: 1.57 },
|
||
|
|
'scale': { value: 1.0 }
|
||
|
|
|
||
|
|
},
|
||
|
|
|
||
|
|
vertexShader: /* glsl */`
|
||
|
|
|
||
|
|
varying vec2 vUv;
|
||
|
|
|
||
|
|
void main() {
|
||
|
|
|
||
|
|
vUv = uv;
|
||
|
|
gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
|
||
|
|
|
||
|
|
}`,
|
||
|
|
|
||
|
|
fragmentShader: /* glsl */`
|
||
|
|
|
||
|
|
uniform vec2 center;
|
||
|
|
uniform float angle;
|
||
|
|
uniform float scale;
|
||
|
|
uniform vec2 tSize;
|
||
|
|
|
||
|
|
uniform sampler2D tDiffuse;
|
||
|
|
|
||
|
|
varying vec2 vUv;
|
||
|
|
|
||
|
|
float pattern() {
|
||
|
|
|
||
|
|
float s = sin( angle ), c = cos( angle );
|
||
|
|
|
||
|
|
vec2 tex = vUv * tSize - center;
|
||
|
|
vec2 point = vec2( c * tex.x - s * tex.y, s * tex.x + c * tex.y ) * scale;
|
||
|
|
|
||
|
|
return ( sin( point.x ) * sin( point.y ) ) * 4.0;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
void main() {
|
||
|
|
|
||
|
|
vec4 color = texture2D( tDiffuse, vUv );
|
||
|
|
|
||
|
|
float average = ( color.r + color.g + color.b ) / 3.0;
|
||
|
|
|
||
|
|
gl_FragColor = vec4( vec3( average * 10.0 - 5.0 + pattern() ), color.a );
|
||
|
|
|
||
|
|
}`
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
export { DotScreenShader };
|