feat: initialize project with core dependencies and game entry point

node_modules/three/examples/jsm/shaders/DotScreenShader.js

@@ -0,0 +1,75 @@
+import {
+	Vector2
+} from 'three';
+
+/**
+ * @module DotScreenShader
+ * @three_import import { DotScreenShader } from 'three/addons/shaders/DotScreenShader.js';
+ */
+
+/**
+ * Dot screen shader based on [glfx.js sepia shader](https://github.com/evanw/glfx.js).
+ *
+ * @constant
+ * @type {ShaderMaterial~Shader}
+ */
+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 };