Add support for scissor and viewport settings

[vanruesc]

Description

Add support for scissor/viewport settings to Pass and RenderPipeline.

Related: #386

Tasks

• Add scissor and viewport settings to Pass.
• Consider also adding scissor and viewport settings to RenderPipeline.
• Check if such settings also make sense elsewhere.
• Add a scissor-viewport demo.

Implementation Details

• Use the scissor, scissorTest and viewport settings on WebGLRenderTarget.

[vanruesc]

@jo-chemla scissor/viewport settings have landed in v7.0.0-beta.5.

Pass now has viewport and scissor properties and RenderPipeline can set the viewport/scissor for all passes via setViewport and setScissor. Here's an example of how to use it:

postprocessing/manual/assets/js/src/demos/scissor-viewport.ts

Line 102 in dfe16f1

// Post Processing

[drone1]

amazing, tysm!

btw, any performance concerns that you're aware of?

[vanruesc]

btw, any performance concerns that you're aware of?

None that I'm aware of 👍