Knight Tyme (48k): Routine at 29110

29110: Paint room layout data entry's terrain interaction parameters, applying horizontal mirror (room drawing)

Used by the routine at 28070.

See also analogous routine at 28874 (RLE attribute data painting)

Input
HL	Points to entry in lookup table for RLE terrain interaction data (room layout graphics) (at 51997)

Output
B	y-coordinate of graphic's bottom
C	x-coordinate of graphic's left

29110

PUSH HL

Store HL (current entry in lookup table for RLE terrain interaction data)

29111

LD HL,23495

Modify instruction at 29220 to load x-coordinate of graphic's right edge into A...

29114

LD (29221),HL

...i.e. set end x-coordinate for painting left-to-right

29117

LD HL,29262

Modify instruction at 29224 to jump to 29262...

29120

LD (29225),HL

...i.e. advance HL up one character row in terrain interaction data table at 24064

29123

LD A,35

Modify instruction at 29227 with opcode 35 (INC HL)...

29125

LD (29227),A

...

29128

POP HL

Restore HL (current entry in lookup table for RLE terrain interaction data)

29129

Store coordinates of area to be coloured and point IX at RLE terrain interaction data

29132

LD A,(23493)

Load C with x-coordinate of graphic's left edge...

29135

LD C,A

...

29136

LD A,(23496)

Load B with y-coordinate of graphic's bottom edge...

29139

LD B,A

...

29140

Jump to terrain interaction data painting routine