En:Libterrain

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The library libterrain makes available functions to create mountains and funnels out of fl-gradient. It makes the following methods available:

draw_full(x0,y0,xw,yw,what)

x0 and y0 indicate the coordinates of the left upper corner of the mountain and/or funnel. wx and wy indicate the x- and y- dimensions. For what the values 1 (Mountain) or 0 (Funnel) are used.

draw_ring(x0,y0,xw,yw,what)

Sets a ring from sloped floor tiles. Arguments are analogous to draw_full(...).