Blitzbasic mapengine function
error=layer_iso1_pos (layer.layer, x, y)

Description
Calculate screen-coordinates from tile-coordinates. You need layer type handle (search with layer_find).

Parameter
layer.layer=layer type handle
x=tile coordinate x (0...)
y=tile coordinate y (0...)

Return value
0=error, 1=ok
change global variables layer_x + layer_y