在3D中定义球面网格的数组可以通过以下步骤实现:
以下是一个示例代码片段,用于在JavaScript中定义球面网格的数组:
function createSphereMesh(radius, subdivisions) {
var vertices = [];
var indices = [];
for (var lat = 0; lat <= subdivisions; lat++) {
var theta = lat * Math.PI / subdivisions;
var sinTheta = Math.sin(theta);
var cosTheta = Math.cos(theta);
for (var lon = 0; lon <= subdivisions; lon++) {
var phi = lon * 2 * Math.PI / subdivisions;
var sinPhi = Math.sin(phi);
var cosPhi = Math.cos(phi);
var x = cosPhi * sinTheta;
var y = cosTheta;
var z = sinPhi * sinTheta;
vertices.push(radius * x, radius * y, radius * z);
}
}
for (var lat = 0; lat < subdivisions; lat++) {
for (var lon = 0; lon < subdivisions; lon++) {
var first = lat * (subdivisions + 1) + lon;
var second = first + subdivisions + 1;
indices.push(first, second, first + 1);
indices.push(second, second + 1, first + 1);
}
}
return { vertices: vertices, indices: indices };
}
var sphereMesh = createSphereMesh(1, 32);
console.log(sphereMesh.vertices); // 球面网格的顶点坐标数组
console.log(sphereMesh.indices); // 球面网格的三角形索引数组
这个示例代码使用了球坐标系来生成球面网格的顶点坐标,并使用三角形索引来定义球面网格的面。你可以根据需要调整半径和细分级别的参数来创建不同大小和细节的球面网格。
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