Demo Design

Responsibilities

• Wire the core and TUI renderer together.
• Keep CLI behavior small and predictable.
• Demonstrate the linear algebra pipeline without adding engine-level concepts.

Defaults

• Cube: rotating, radius/half-size 1.0.
• Sphere: static, radius 2.4, 18 rings, 36 segments.
• Torus: rotating, major radius 2.1, minor radius 0.72, outward face winding.
• Hitchcock: central cube plus background cylinder, cone, triangular pyramid, and rotated variants.
• Renderer: terminal-derived viewport with 80x32 fallback, dotted background, scientific-camera projection, and terminal y-scale 0.5.

Non-Goals

• Runtime UI, command parser, config files, or interactive controls.
• Persisted scenes or asset loading.
• Snapshot-stable ASCII art tests.