The code implements a piecewise mathematical generation algorithm that reconstructs the retro landscape geometry from the DOS game Bang! Bang! [2.1]. It relies on a deterministic custom Pseudo-Random Number Generator (PRNG) called a Linear Congruential Generator (LCG) to ensure that entering the exact same seed integer always yields identical environmental geometry [2.1].
The landscape maps out across 512 total horizontal coordinate steps (TERRAIN_W = 0x200) relative to a fixed floor baseline (HORIZON_Y = 390) [2.1].
- The Left Mesa (CE): The algorithm picks an edge coordinate from 78 to 193 [2.1]. Everything from index 0 up to CE is locked at a flat height defined by mesa[0] [2.1].
- The Right Mesa (DA): The algorithm picks a starting index from 318 to 433 [2.1]. Everything from index DA to 512 is locked flat at a height defined by mesa[1] [2.1].