Parallax and Multi View Rendering

Parallax in Gondwana is not a special effect bolted onto the renderer. It is a first-class property of SceneLayer.

Each layer has a Parallax factor:

• < 1 moves slower than the camera
• = 1 moves normally
• > 1 moves faster than the camera

Because view transforms apply parallax during world-to-screen conversion, the effect naturally falls out of the normal render path.

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Multi-view rendering

A RenderSurfaceHost can own multiple views. Each one can have:

• its own camera
• its own viewport rectangle
• its own zoom
• its own z-order

This supports:

• split-screen
• minimaps
• picture-in-picture
• layered overlay views

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Overlap behavior

Views are rendered in ascending ZOrder. Higher views can clip lower ones where their viewport rectangles overlap.

That gives Gondwana deterministic compositing even when views share screen space.

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Key insight

Parallax is layer-relative. Multi-view is render-surface-relative.

Those are different axes of composition, and Gondwana supports both at once.

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Where to read next

• Gondwana/Scenes/SceneLayer.cs
• Gondwana/Rendering/Views/View.cs
• Gondwana/Rendering/Views/ViewManager.cs
• Gondwana/Rendering/RenderSurfaceHost.cs