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prometeu-runtime/docs/runtime/learn/mental-model-touch.md
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Touch Mental Model

Status: pedagogical Companion spec: ../specs/07-touch-peripheral.md

PROMETEU uses TOUCH as an absolute, deterministic pointer, not as a gesture-rich surface.

Design Intuition

The central principle is simple:

  • a single active pointer;
  • no implicit gestures;
  • no acceleration;
  • no heuristics;
  • the same behavior on desktop, mobile, and dedicated hardware.

If a behavior cannot be guaranteed portably, it does not enter the machine.

Why Single Pointer

Physical multitouch may exist on the host, but the machine chooses a single logical pointer to avoid:

  • capture ambiguities;
  • differences between platforms;
  • semantic shifts between mouse, real touch, and built-in touchscreen.

Good Uses

TOUCH works well for:

  • UI;
  • direct selection;
  • drag-and-drop;
  • pointing puzzles;
  • trails, cuts, and contact-based mechanics.

What Games Must Do Themselves

If a game wants gestures, swipe, long-press, or smoothing, it must build that on top of the raw per-frame state. The peripheral does not interpret intent.