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Inverted Gravity
Posted: Mon Mar 06, 2017 11:22 am
by Nisaba
I'm looking for a way of flipping the gravity, so Keen and all enemies are walking upside-down. Like as if they were stuck on to the ceiling. the game physics should remain the same, only the gravitational force is directly opposed.
is there a way of patching this?
and if so, might it be possible to insert this gravity flip for just one certain single level?!
I'm really curious about this...
Re: Inverted Gravity
Posted: Tue Mar 07, 2017 4:59 am
by levellass
A permanent flip is simple enough, this for example controls the strength of gravity in Keen 1:
Code: Select all
#Change the game's gravity:
%patch $2C37 $03 #Acceleration (How fast jumps/falls change)
%patch $2C3C $00C8W #Max fall speed 1
%patch $2C44 $00C8W #Max fall speed 2
Code: Select all
#Change the game's gravity: REVERSED
%patch $2C37 $FD #Acceleration (How fast jumps/falls change)
%patch $2C3C $FFC8W #Max fall speed 1
%patch $2C44 $FFC8W #Max fall speed 2
A 1-level switch of gravity is more complicated since a new gravity function is needed. It can be done, but it's no minor endeavor. Also note that reversing gravity usually sticks everyone on the ceiling; without code to 'jump down' Keen will be stuck on roofs and adding THAT is another big mess.
I will note that reversing ONLY the third line of that patch has some... interesting results.