The ViewHelper shows different Y-axis positions between WebGL and WebGPU renderers.

[Child-qjj]

Description

maybe because of the different coordinate systems in WebGL and WebGPU ?

Can be resolved by add follow codes in ViewHelper.js?

			const x = domElement.offsetWidth - dim;
                         const y = renderer.isWebGPURenderer ? domElement.offsetHeight - dim : 0;

			renderer.clearDepth();

			renderer.getViewport( viewport );
			renderer.setViewport( x, y, dim, dim );

Reproduction steps

1. use the viewHelper in WebRenderer and WebGPURenderer
2. the viewHelper in different position

Code

// code goes here

Live example

• jsfiddle-latest-release WebGLRenderer
• jsfiddle-latest-release WebGPURenderer

Screenshots

Version

r.0.174

Device

Desktop

Browser

Chrome

OS

MacOS

[Mugen87]

Can be resolved by add follow codes in ViewHelper.js?

Yes, since the viewport conventions are different. Would you like to create a PR with your fix?

[Child-qjj]

It's my pleasure