2018-09-23 20:41:56 +08:00
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use na::Real;
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2018-09-22 19:18:59 +08:00
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2018-09-23 20:41:56 +08:00
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use aliases::TVec3;
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2018-09-22 19:18:59 +08:00
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/// The normal vector of the given triangle.
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///
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/// The normal is computed as the normalized vector `cross(p2 - p1, p3 - p1)`.
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2018-09-23 20:41:56 +08:00
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pub fn triangle_normal<N: Real>(p1: &TVec3<N>, p2: &TVec3<N>, p3: &TVec3<N>) -> TVec3<N> {
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2018-09-22 19:18:59 +08:00
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(p2 - p1).cross(&(p3 - p1)).normalize()
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}
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