triangleNormal

calculate normal for triangle

vec3 triangleNormal(vec3 p1, vec3 p2, vec3 p3)
vec3 triangleNormal(float[3] p1, float[3] p2, float[3] p3)
vec3
triangleNormal
(
float[3] p1
,
float[3] p2
,
float[3] p3
)

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