Question

我只需要更新一条有两个顶点的线，我试图使用上面这些在r58中更改的东西，但线条不能移动，我只是初始化：

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);

并且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;

但这些线条没有移动或渲染自己。

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;

您可以在创建几何图形时删除行position.needsUpdate = true。

我还建议您更新到当前版本。

three.js r.63

Three.js：如何更新BufferGeometry顶点

1 个答案: