创建一个宇宙弦理论效果着色器，模拟高维弦的振动效果，包含量子场和维度效果，提供三种宇宙类型可选。

uniform float uTime;
uniform float uStringVibration;
uniform float uDimensionCount;
uniform float uSpacetimeCurvature;

void main() {
    vUv = uv;
    vPosition = position;
    vNormal = normal;
    
    // 弦振动效果
    float vibration = sin(position.x * 3.0 + uTime * uStringVibration) * 
                     cos(position.y * 4.0 + uTime * uStringVibration * 0.8) *
                     sin(position.z * 3.0 + uTime * uStringVibration * 0.6);
    
    // 维度效果
    float dimension = sin(position.x * 5.0 + uTime * uDimensionCount * 2.0) *
                     cos(position.z * 5.0 + uTime * uDimensionCount * 2.0);
    
    // 时空曲率
    float curvature = sin(position.x * uSpacetimeCurvature * 6.0) *
                     cos(position.y * uSpacetimeCurvature * 8.0);
    
    vec3 newPosition = position + normal * (vibration + dimension * 0.5 + curvature * 0.3) * 0.15;
    
    gl_Position = projectionMatrix * modelViewMatrix * vec4(newPosition, 1.0);
}

float stringTheory(vec2 uv, float vibration) {
    float stringField = 0.0;
    
    // 多层弦振动
    stringField += sin(uv.x * 4.0 + uTime * 0.3) * 
                  cos(uv.y * 6.0 + uTime * 0.5);
    stringField += sin(uv.x * 6.0 + uTime * 0.7) * 
                  cos(uv.y * 8.0 + uTime * 0.9) * 0.7;
    stringField += sin(uv.x * 8.0 + uTime * 1.1) * 
                  cos(uv.y * 10.0 + uTime * 1.3) * 0.4;
    
    return stringField * vibration;
}

float quantumField(vec2 uv, float intensity) {
    float field = 0.0;
    for(int i = 0; i < 25; i++) {
        vec2 fieldPos = vec2(
            noise(vec2(float(i) * 0.123, 0.456)),
            noise(vec2(float(i) * 0.456, 0.789))
        );
        float dist = distance(uv, fieldPos);
        float fieldSize = noise(vec2(float(i) * 0.789, 0.123)) * 0.04 + 0.02;
        float fieldLife = mod(uTime * 1.5 + float(i) * 8.0, 6.28);
        float fieldIntensity = sin(fieldLife) * 0.7 + 0.3;
        field += exp(-dist * 45.0) * fieldIntensity * intensity;
    }
    return field;
}

float dimensions(vec2 uv, float count) {
    float dimensionField = 0.0;
    
    // 多维空间效果
    dimensionField += sin(uv.x * 8.0 * count) * 
                     cos(uv.y * 8.0 * count) * 0.3;
    
    // 高维振动
    dimensionField += sin(uv.x * 12.0 + uTime * count * 2.0) * 
                     cos(uv.y * 12.0 + uTime * count * 2.0) * 0.2;
    
    return dimensionField;
}