static public bool TryGetTriangleCoplanarEdge(this Plane item, Triangle3 triangle, float tolerance, out LineSegment3 edge)
{
bool is_v0_near = item.GetAbsoluteDistanceToPoint(triangle.v0) <= tolerance;
bool is_v1_near = item.GetAbsoluteDistanceToPoint(triangle.v1) <= tolerance;
bool is_v2_near = item.GetAbsoluteDistanceToPoint(triangle.v2) <= tolerance;
if (is_v0_near && is_v1_near && is_v2_near == false)
{
edge = triangle.GetEdge01();
return(true);
}
if (is_v1_near && is_v2_near && is_v0_near == false)
{
edge = triangle.GetEdge12();
return(true);
}
if (is_v2_near && is_v0_near && is_v1_near == false)
{
edge = triangle.GetEdge20();
return(true);
}
edge = default(LineSegment3);
return(false);
}
static public Vector3 GetPointOnEdgeByPercent(this Triangle3 item, float percent)
{
percent = percent.GetLooped(3.0f);
if (percent < 1.0f)
{
return(item.GetEdge01().GetPointOnByPercent(percent));
}
if (percent < 2.0f)
{
return(item.GetEdge12().GetPointOnByPercent(percent - 1.0f));
}
return(item.GetEdge20().GetPointOnByPercent(percent - 2.0f));
}