Rotation and Picking

Turning a scene is a camera driven by pointer deltas. Pointing into it runs the pipeline backward, from a pixel to the object drawn there: WebGL keeps no record, so you either draw again into an ID buffer or cast a ray.

Subsections

• Mouse Tracking
• Rotating a Scene by Dragging
• Inertia
• Screen to Clip Space
• Color Picking
• Ray Casting
• Selecting a Whole Object
• Selecting a Part of an Object
• Highlighting the Selected Part
• Clickable Covers