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Very simple question

What does it mean when a triangle is front facing vs. back facing? Can a 2 dimensional triangle possibly have these properties? And also, doesn't the "eye" affect the answer to this question? Thanks for any answers.

JJH

Comments

  • TomyTomy Posts: 35Member
    When modelling 3D-objects, people only make the 'skin', not the volume. More: for games and other time-critical applications, objects are only made out of triagles. The corners of those triangles are defined clockwise, when looking from outside to inside the objects. This means that, when transformed to 3D screen-coordinates, you can determine if the triangle is unvisible from your point of view (backfacing or not) by checking if the transformed corner-points are still clockwise positioned or not. As far as I know, this has only to do with 3D graphics, and is used to decrease rendering time.

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