Routines
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D18E: Convert Position
Used by the routine at ProjectObject.
Converts a position along one axis of the map into the position in the view, which is the same unless the view is rotated, when the position is turned around.
Input
H Tile
L Fraction
Output
H Tile converted
L Fraction converted
ConvertPosition D18E LD A,($BBBA) Return if the view is not turned round.
D191 AND $01
D193 RET Z
D194 LD A,L Turn the fraction round.
D195 CPL
D196 LD L,A
D197 LD A,H Turn the tile round by subtracting it from 1F.
D198 CPL
D199 AND $1F
D19B LD H,A
D19C RET Return.
View the equivalent code in;
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