PxPerMeter

Pixels-per-meter ratio used to map UI coordinates (px) to physics coordinates (m).

Definition

value is px per 1 meter (px/m).

Conversions:

• meters = pixels / value

• pixels = meters * value

What changing value does

• Larger value ⇒ more pixels per meter:

• The same UI size in pixels becomes smaller in meters.

• The same physical speed in m/s becomes faster on screen in px/s.

• Smaller value ⇒ fewer pixels per meter:

• UI sizes become larger in meters.

• The same physical speed in m/s becomes slower on screen in px/s.

Practical guidance

For stable UI physics, aim for typical body sizes to land roughly in the 0.1–2.0 m range. Example for a 120 px card:

• PxPerMeter(120f) → ~1.0 m

• PxPerMeter(240f) → ~0.5 m

Too large value can make objects extremely small in meters, which may degrade stacking stability.

Example: with PxPerMeter(100f), an object moving by 1 meter in physics moves by 100 px on screen.