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/*world的长宽高*/
let worldx = 128;
let worldy = 128;
let worldz = 128;
let hillnum = 50;/*山丘数量，可以自定义*/
(async function () {
    for (let x = 0; x < worldx; x++) {
        for (let z = 0; z < worldz; z++) {
            for (let y = 0; y < worldy; y++) {
                voxels.setVoxel(x, y, z, 0);
            };
        };
    };
    await sleep(3000);
    for (let x = 0; x < worldx; x++) {
        for (let z = 0; z < worldz; z++) {
            for (let y = 0; y < 9; y++) {
                voxels.setVoxel(x, y, z, 'grass');
            };
        };
    };
    await sleep(3000);
    for (let i = 0; i < hillnum + 1; i++) {
        var x = Math.random() * worldx;
        var y = 9;
        var z = Math.random() * worldz;
        var weight = 5 + Math.random() * 15;
        for (let j = 0; j < weight + 1; j++) {
            cylinder('grass', x, y, z, weight - j, 1);
            if (Math.random() < 0.2) {
                cylinder('grass', x, y, z, weight - j, 2);
                y++;
            }
            y++
        };
    };
})();

function cylinder(vox, cx, cy, cz, radius, height) {
    var xend = cx + radius;
    var yend = cy + height;
    var zend = cz + radius;
    for (let x = cx - radius; x <= xend; x++) {
        for (let z = cz - radius; z <= zend; z++) {
            let dx = x - cx;
            let dz = z - cz;
            if (Math.round(Math.sqrt(dx * dx + dz * dz)) <= radius) {
                for (let y = cy; y < yend; y++) {
                    if (Math.random() < 0.95) {
                        voxels.setVoxel(x, y, z, vox);
                    }
                };
            };
        };
    };
};