Callback: Building colour

Building colour (1E)

Called to decide what colour mapping the building should use. Should return the number of the colour mapping to be used, for example, 775 for blue->dark blue mapping.

This can be useful if you want something more complex than four random colours.

 2.5 From TTDPatch 2.0.1 alpha 67, you can return a value of col2*16+col1 plus bit 14 set, where col1 and col2 are two company colours. For example, a return value of 73 C0 uses col1=3=yellow and col2=7=dark green. If no two-company-colour maps have been installed, the colours from prop. 17 are used instead.

Uses 15 return bits.