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QuadMV

left handed vs right handed

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Hey guys, I feel dumb, I never think about this much anymore, but I’m trying to work through a problem and I can’t remember the details. DirectX is generally a left handed coord system, right? As such it’s +x to the right, +y up, and +z into the screen, right? Also, the front face of a triangle with a left handed coord system is counter clockwise right?

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Quote:
Original post by QuadMV
DirectX is generally a left handed coord system, right? As such it’s +x to the right, +y up, and +z into the screen, right?

Yes.

Quote:
Original post by QuadMV
Also, the front face of a triangle with a left handed coord system is counter clockwise right?

No. In a LHS, a triangle is facing the camera if the vertexes are clockwise. When doing back-face culling, you cull the CCW triangles.

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