Refresh the WebGL Canvas with Three.JS

I am currently working on a project using the WebGLRenderer in three.js, but I am facing an issue with clearing the canvas. The problem arises when I try to add another object to the scene by first clearing out the children of a group. Here is the code snippet:

group = new THREE.Object3D();

function add(object){
    group.children = [];//clears the group children first
    group.add(object);
}

Despite attempting to clear the children of the group, the canvas does not clear as expected. In traditional canvas rendering, this process is usually handled automatically. Can anyone provide insights into how I can properly clear the WebGL canvas?

Answer №1

When it comes to managing a canvas and scene graph, clearing each has its own distinct process.

To clear the canvas, you can use renderer.clear() if your rendering engine is named renderer.

For clearing a subtree of the scene graph, you have options like

group.remove.apply(group, group.children)
or in modern JavaScript, group.remove(...group.children). It's advisable not to simply replace the array in group.children, as it can cause internal issues. Instead, add objects using group.add(object) and remove them with group.remove(object).

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