Sonic Retro, “Sonic Physics Guide: Calculations (Pixel and Subpixel)”

Cite as: Sonic Retro, “Sonic Physics Guide: Calculations (Pixel and Subpixel)”
Original: https://info.sonicretro.org/SPG:Calculations
Archived: https://web.archive.org/web/20251008002715/https://info.sonicretro.org/SPG:Calculations
Accessed: 2026-10-20
Credit: Sonic Physics Guide, written and maintained by the Sonic Retro community.

Cited on

`ObjectFall` adds the pre-gravity speed, shifted left 8 bits, to the 32-bit position, so positions are 16.16 and speeds 8.8 fixed point.	`Pixel and Subpixel`	T3