What is mode in Window#draw_triangle of Ruby implementation

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Topic Gosu / Gosu Exchange / What is mode in Window#draw_triangle of Ruby implementation

By ucode Date 2012-11-21 20:54

I'm drawing triangles with:
draw_triangle(x1, y1, c1, x2, y2, c2, x3, y3, c3, z = 0, mode = :default)

I'm very curious what options there are for mode. The documentation never mentions anything about it as far as I can see.

By Spooner Date 2012-11-21 23:48

The supported modes are :default (alpha blend), :add (add colours) and :multiply (multiply colours). Look up additive and multiplicative blending if you don't know what those actually do.

Topic Gosu / Gosu Exchange / What is mode in Window#draw_triangle of Ruby implementation