demo.design 3D programming FAQ. ��. �� .

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7.1. ��

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sx_start += dx_start;
sx_end += dx_end;

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sx_start = A.sx + dx_start * (current_sy - A.sy),

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sx_start = A.sx + dx_start * (ceil(A.sy) - A.sy);
sx_end = A.sx + dx_end * (ceil(A.sy) - A.sy);

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// ...
u_start += du_start * (ceil(start_y) - start_y);
u_end += du_end * (ceil(start_y) - start_y);
// ...

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