Outcode Clipping of Triangles
For triangles we need merely modify the tests so that all vertices are considered:
if (outcode1 == 0 &&
outcode2 == 0 &&
outcode3 == 0) then
triangle is inside
else
if (outcode1 & outcode2 & outcode3 != 0) then
triangle is outside
else
don't know
endif
endif
This form of clipping is not limited to triangles or convex polygons.
Is is simple to implement. But it won't handle all of our problems...
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