Three.js - 从点缩放圆柱体 [英] Three.js - scale cylinder from point

问题描述

是否可以从特定点在 Y 轴上增加圆柱体的比例.

Is it possible to increase the scale of a cylinder on the Y-axis from a specific point.

不是圆柱体从原点向上和向下增长到新的比例，而是像条形图一样从顶部向上/向下增长.

As instead of the cylinder growing from its origin up and down to the new scale, growing from the top upwards/downwards only like a bar chart.

当前代码:

function animate() {
    render();
    cylinder.scale.y += 0.1;
    requestAnimationFrame(animate);
}

推荐答案

你可以创建一个中介Object3D来实现:

You can create a intermediary Object3D to achieve this:

var cylinder = new THREE.Object3D();
scene.add( cylinder );

var cylinderMesh = new THREE.Mesh(geometry.material);
cylinder.add(cylinderMesh);

cylinderMesh.position.y = 2; // move pivot up
cylinder.scale.y += 0.1;

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