Switch up Three.js texture in externally imported Collada model

Currently, I am using the three.js collada loader to bring in an .dae file that includes a texture (.png) image. The challenge I am facing involves replacing this original .png file with a new texture generated from a canvas element and saved in .png format. To see the changes reflected in the render, I have discovered that clearing the cache does the trick (simply saving the new texture with the same filename as the original). However, how can I ensure that the updated texture is recognized and rendered without requiring users to clear their cache manually?

I am exploring solutions where the new texture created replaces the old one seamlessly, triggering a re-render of the collada file automatically when a user interacts with a button to display the modified box. Any advice on implementing this feature would be greatly appreciated.

javascriptthree.js

Answer №1

After creating a Javascript Image object and storing it in memory, regardless of its source, you have the ability to assign it to textures within your objects' materials using the .image attribute. You must then notify THRE.js to update the binding. For instance, if you have an Image named img and a mesh named mesh with a standard material:

mesh.material.map.image = img;
mesh.material.map.needsUpdate = true;

This simple approach should get the job done. There's no requirement to save the image as a .png file on disk - just utilize it directly.

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