feat: initialize sunrise with 100-player shared rooms

src/scene/sky.ts

@@ -0,0 +1,32 @@
+import { MathUtils, Vector3 } from 'three';
+import { Sky } from 'three/addons/objects/Sky.js';
+import { SCENE } from '../constants/scene.ts';
+import { NIGHT_SKY } from '../constants/nightSky.ts';
+import { cloudShader, skyCloudFragment } from './clouds.ts';
+
+export function createSky() {
+  const mesh = new Sky();
+  const fragment = mesh.material.fragmentShader;
+  const start = fragment.indexOf('// Clouds');
+  const end = fragment.indexOf('gl_FragColor = vec4( texColor, 1.0 );', start);
+  if (start < 0 || end < 0) throw new Error('Sky cloud shader integration needs updating');
+  const nightBackground = `texColor += vec3(${NIGHT_SKY.backgroundRadiance.map(value => value.toFixed(3)).join(', ')})
+    * (1.0 - smoothstep(-0.07, 0.05, vSunDirection.y));`;
+  mesh.material.fragmentShader = cloudShader + fragment.slice(0, start) + nightBackground + skyCloudFragment + fragment.slice(end);
+  mesh.scale.setScalar(SCENE.skyRadius);
+  const uniforms = mesh.material.uniforms;
+  uniforms.turbidity.value = 2.5;
+  uniforms.rayleigh.value = 2;
+  uniforms.mieCoefficient.value = SCENE.mieCoefficient;
+  uniforms.mieDirectionalG.value = SCENE.mieDirectionalG;
+  uniforms.showSunDisc.value = 0;
+  uniforms.cloudCoverage.value = 0;
+  return {
+    mesh,
+    update(direction: Vector3, altitude: number, cloudCover = 0) {
+      uniforms.sunPosition.value.copy(direction).multiplyScalar(SCENE.skyRadius);
+      uniforms.rayleigh.value = MathUtils.lerp(2.5, 1.7, MathUtils.smoothstep(altitude, -6, 30));
+      uniforms.cloudCoverage.value = cloudCover;
+    },
+  };
+}