Function createGalaxy

geometry.js:138–169

(i, count)

}

function createGalaxy(i, count) {
    // Galaxy parameters
    const numArms = 4;            // Number of spiral arms
    const armWidth = 0.15;        // Width of each arm (0-1)
    const maxRadius = 40;         // Maximum radius of the galaxy
    const thickness = 5;          // Vertical thickness
    const twistFactor = 2.5;      // How much the arms twist
    
    // Determine which arm this particle belongs to
    const armIndex = i % numArms;
    const indexInArm = Math.floor(i / numArms) / Math.floor(count / numArms);
    
    // Calculate radial distance from center
    const radialDistance = indexInArm * maxRadius;
    
    // Add some randomness for arm width
    const randomOffset = (Math.random() * 2 - 1) * armWidth;
    
    // Calculate angle with twist that increases with distance
    const armOffset = (2 * Math.PI / numArms) * armIndex;
    const twistAmount = twistFactor * indexInArm;
    const angle = armOffset + twistAmount + randomOffset;
    
    // Add height variation that decreases with distance from center
    const verticalPosition = (Math.random() * 2 - 1) * thickness * (1 - indexInArm * 0.8);
    
    return new THREE.Vector3(
        Math.cos(angle) * radialDistance,
        verticalPosition,
        Math.sin(angle) * radialDistance
    );
}

function createWave(i, count) {
    // Wave/ocean parameters