Routines
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C7FE: Is an object near a point?
Used by the routines at
arch_nudge_loop
and
near_arch_loop
.
Input
IX
a record whose +$09 to +$0B hold the point's x, y and z
IY
the object's record
L
the limit along x
H
the limit along y
F
on exit, carry set if the object's x, y and z are all within the limits (z within 4)
is_near_to
C7FE
LD A,(IX+$09)
the distance along x
C801
SUB (IY+$01)
C804
JR NC,
near_check_y
C806
NEG
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