Skipping walls swimming in Half-Life
Water movement code explained by YaLTeR:
1. calculate move end position (just as a vector, no collision checks whatsoever)
2. trace from (this end position + stepsize + 1) to (this end position)
3. if the trace wasn't inside something, use this end position and return
worldspawn wall skipping locations and estimated TAS time saves
blast pit
(tentacle skip 60s+)
toxic waste canal into pipe 2s
apprehension
tram skip 5s
swimming maze 12s
(stairs and pistons skip 4s)
residue processing
hazard pools skip 4s
canal skip through bottom 9s
forget about freeman
(sewer to elevator 2s++)
lambda core
water pipe skip 4s
(lambda core water into teleporter room 8s)