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p0, p2, p3, p4 are points in 3D and are connected on a straight line where p0 and p4 are fixed. How to find the normal at p2 and p3?

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closed as unclear what you're asking by Josh Petrie May 14 at 15:25

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question.If this question can be reworded to fit the rules in the help center, please edit the question.

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You can create 2 vectores between your vertices. By taking the cross product of these 2 vectors you will get your normal. I'm not sure so someone should confirm if that is possible with your setup. Also is there a difference between node and vertice here? –  Sidar Dec 21 '12 at 9:49
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What do you mean by "normal to v2"? Are V1, V2, V3 co-linear or do they form a non-degenerate triangle? Please provide a slightly clearer picture to what you have and want to compute. –  teodron Dec 21 '12 at 9:49
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Do V1 and V3 already have an associated normal? If so, do you want to interpolate normals along a straight edge V1V3, or is V2 part of a more complex curve? –  Sam Hocevar Dec 21 '12 at 10:08
    
I think you want to find more points on a path linking v1, v2 and v3, but we need more than that to help you. Do you have a definition of the surface in question, like a parametric definition or an equation? Could you clarify your question? –  madshogo Dec 21 '12 at 16:37
    
...I can't make head or tails of this question. –  Trevor Powell Dec 21 '12 at 22:50

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