Three.js:如何更新BufferGeometry顶点

Question

我只需要更新一条有 2 个顶点的线，我尝试使用上面在 r58 中更改的这些东西，但是线不能移动，我只是用它来初始化:

var geometry = new THREE.BufferGeometry();
geometry.addAttribute('position', Float32Array, 2, 3);
geometry.dynamic = true;

var position = geometry.attributes.position;
position.needsUpdate = true;

var p = position.array;

var i = 0;
p[i++] = vertex1.position.x;
p[i++] = vertex1.position.y;
p[i++] = vertex1.position.z;
p[i++] = vertex2.position.x;
p[i++] = vertex2.position.y;
p[i] = vertex2.position.z;

var color = new THREE.Color();
color.g = color.b = 1 - this.value;

var material = new THREE.LineBasicMaterial({
  color: color.getHex(),
  linewidth: 5 // THIS DON'T WORKS IN WINDOWS?
});

this.model = new THREE.Line(geometry, material);

在更新渲染中，我只是这样做:

var p = this.model.geometry.attributes.position.array;

var i = 0;
p[i++] = vertex1.position.x;
p[i++] = vertex1.position.y;
p[i++] = vertex1.position.z;
p[i++] = vertex2.position.x;
p[i++] = vertex2.position.y;
p[i] = vertex2.position.z;

但线条没有移动或呈现自身。

Answer 1

在您的情况下，您需要在更新顶点时在渲染循环中添加以下内容:

this.model.geometry.attributes.position.needsUpdate = true;

您可以删除该行 position.needsUpdate = true创建几何图形时。

我还建议您更新到当前版本。

三.js r.63