public void SetPointConstaintSide(CSGPlane buildPlane, int pointIndex, int side, HandleConstraints state)
{
if (curveTangentHandles[(pointIndex * 2) + side].Constraint == state)
{
return;
}
curveTangentHandles[(pointIndex * 2) + side].Constraint = state;
if (state != HandleConstraints.Straight &&
curveTangentHandles[(pointIndex * 2) + (1 - side)].Constraint != HandleConstraints.Straight)
{
if (state == HandleConstraints.Broken &&
curveTangentHandles[(pointIndex * 2) + (1 - side)].Constraint == HandleConstraints.Mirrored)
{
curveTangentHandles[(pointIndex * 2) + (1 - side)].Constraint = HandleConstraints.Broken;
}
curvePointHandles[pointIndex].Tangent = true;
curve.Tangents[(pointIndex * 2) + side].Tangent = -curve.Tangents[(pointIndex * 2) + (1 - side)].Tangent;
return;
}
switch (state)
{
case HandleConstraints.Broken:
case HandleConstraints.Mirrored:
{
if (curvePointHandles[pointIndex].Tangent)
{
break;
}
var count = curve.Points.Length;
var prev = (pointIndex + count - 1) % count;
var curr = pointIndex;
var next = (pointIndex + count + 1) % count;
var vertex0 = curve.Points[prev];
var vertex1 = curve.Points[curr];
var vertex2 = curve.Points[next];
var centerA = (vertex0 + vertex1 + vertex2) / 3;
var deltaA = (centerA - vertex1);
var tangentA = Vector3.Cross(buildPlane.normal, deltaA);
if (side == 0)
{
tangentA = -tangentA;
}
curvePointHandles[pointIndex].Tangent = true;
curve.Tangents[(pointIndex * 2) + side].Tangent = tangentA;
break;
}
}
}
public void SetPointConstraint(CSGPlane buildPlane, int pointIndex, HandleConstraints state)
{
SetPointConstaintSide(buildPlane, pointIndex, 0, state);
SetPointConstaintSide(buildPlane, pointIndex, 1, state);
}
