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我们看到社区里有很多地形生成器的代码

但代码普遍很长，并且看不懂

这次来教大家自己做一个山峰生成器

首先要学会造圆，具体看https://shequ.codemao.cn/community/382060

然后复制其中造圆（不是球）的函数：

function circle(radius, position, voxel) {
    for (let x = position.x - radius; x <= position.x + radius; x++) {
        for (let z = position.z - radius; z <= position.z + radius; z++) {
            if (new Box3Vector3(x, position.y, z).distance(position) <= radius){
                voxels.setVoxel(x, position.y, z, voxel);
            }
        }
    }
}

由于山峰都不是规则性的，我们要加入一个参数，叫“outerIntegrity”（外层完整性），默认值为1，接下来把函数改成这样：

function circle(radius, position, voxel, outerIntegrity = 1) {
    for (let x = position.x - radius; x <= position.x + radius; x++) {
        for (let z = position.z - radius; z <= position.z + radius; z++) {
            if (new Box3Vector3(x, position.y, z).distance(position) + 1 < radius) {
                voxels.setVoxel(x, position.y, z, voxel);
            } else if (new Box3Vector3(x, position.y, z).distance(position) < radius) {
                if (Math.random() <= outerIntegrity && voxels.getVoxelId(x, position.y-1, z) != 0) {
                    voxels.setVoxel(x, position.y, z, voxel);
                }
            }
        }
    }
}

调用这个函数，outerIntegrity设为0.1到0.9之间的任何一个数，生成了一个不完整的圆

但怎么造山峰呢？现在我们用不完整的圆造山峰

一层一层地堆起来就是一个山峰了

接下来我们来定义一个函数，叫“generateMountain”，写写里面的代码：

function generateMountain(maxHigh, position, maxRadius, voxel) {
    var radius = maxRadius;
    var current = 0;
    var high = 0;
    for (let y = position.y; y <= position.y + maxHigh; y++) {
        circle(radius,position.add(new Box3Vector3(0,high,0)),voxel,1 / (y - current));
        high ++;
        if(y % Math.floor(maxHigh / radius) == 0){
            current = y;
            radius --;
        }
    }
}

是不是简单易懂？

相信聪明人已经明白了地形生成器怎么做，我就不说了

完整代码：

function circle(radius, position, voxel, outerIntegrity = 1) {
    for (let x = position.x - radius; x <= position.x + radius; x++) {
        for (let z = position.z - radius; z <= position.z + radius; z++) {
            if (new Box3Vector3(x, position.y, z).distance(position) + 1 < radius) {
                voxels.setVoxel(x, position.y, z, voxel);
            } else if (new Box3Vector3(x, position.y, z).distance(position) < radius) {
                if (Math.random() <= outerIntegrity && voxels.getVoxelId(x, position.y-1, z) != 0) {
                    voxels.setVoxel(x, position.y, z, voxel);
                }
            }
        }
    }
}
function generateMountain(maxHigh, position, maxRadius, minRadius, voxel) {
    var radius = maxRadius;
    var current = 0;
    var high = 0;
    for (let y = position.y; y <= position.y + maxHigh; y++) {
        circle(radius,position.add(new Box3Vector3(0,high,0)),voxel,1 / (y - current));
        high ++;
        if(y % Math.floor(maxHigh / maxRadius) == 0){
            current = y;
            radius --;
        }
    }
}
//调用：
generateMountain(喵,new Box3Vector3(喵,9,喵),16,8,'stone');

好了，本次教程就到这里，猜猜下次出什么呢？