private static bool intersectEllipseCenter(ArcLoftPath a, out float offsetA, out float offsetB, Vector3 center, float radiusX, float radiusY, float bDirLen, Vector3 bStart, Vector3 bDir)
{
float nearDistance;
float farDistance;
if (VectorMath2D.IntersectsLineEllipse(t2d(bStart), t2d(bDir), Vector3.zero, radiusX, radiusY, out nearDistance, out farDistance))
{
float bestOffsetA = float.PositiveInfinity, bestOffsetB = float.PositiveInfinity;
if (checkRange(a, bDir, center, bDirLen, bStart, nearDistance, ref bestOffsetA, ref bestOffsetB))
{
offsetA = bestOffsetA;
offsetB = bestOffsetB;
return(true);
}
if (checkRange(a, bDir, center, bDirLen, bStart, farDistance, ref bestOffsetA, ref bestOffsetB))
{
offsetA = bestOffsetA;
offsetB = bestOffsetB;
return(true);
}
}
offsetA = offsetB = float.NaN;
return(false);
}
private static bool intersectsEllipseEdge(ArcLoftPath a, Vector3 bStart, Vector3 bDir, Vector3 bTan, Vector3 center, float bDirLen, float widthB, float radiusX, float radiusY, out float offsetA, out float offsetB)
{
var startLeft = bStart - bTan;
var startRight = bStart + bTan;
float outerRadiusX = radiusX + widthB;
float outerRadiusY = radiusY + widthB;
float innerRadiusX = radiusX - widthB;
float innerRadiusY = radiusY - widthB;
float nearDistanceInnerLeft, farDistanceInnerLeft;
float nearDistanceInnerRight, farDistanceInnerRight;
float nearDistanceOuterLeft, farDistanceOuterLeft;
float nearDistanceOuterRight, farDistanceOuterRight;
bool intersectsInnerLeft = VectorMath2D.IntersectsLineEllipse(t2d(startLeft), t2d(bDir), Vector3.zero, innerRadiusX, innerRadiusY, out nearDistanceInnerLeft, out farDistanceInnerLeft);
bool intersectsInnerRight = VectorMath2D.IntersectsLineEllipse(t2d(startRight), t2d(bDir), Vector3.zero, innerRadiusX, innerRadiusY, out nearDistanceInnerRight, out farDistanceInnerRight);
bool intersectsOuterLeft = VectorMath2D.IntersectsLineEllipse(t2d(startLeft), t2d(bDir), Vector3.zero, outerRadiusX, outerRadiusY, out nearDistanceOuterLeft, out farDistanceOuterLeft);
bool intersectsOuterRight = VectorMath2D.IntersectsLineEllipse(t2d(startRight), t2d(bDir), Vector3.zero, outerRadiusX, outerRadiusY, out nearDistanceOuterRight, out farDistanceOuterRight);
//if (intersectsOuterLeft)
// Debug.DrawLine(startLeft + bDir * nearDistanceOuterLeft, startLeft + bDir * farDistanceOuterLeft, Color.green);
//if (intersectsOuterRight)
// Debug.DrawLine(startRight + bDir * nearDistanceOuterRight, startRight + bDir * farDistanceOuterRight, Color.green);
//if (intersectsInnerLeft)
// Debug.DrawLine(startLeft + bDir * nearDistanceInnerLeft, startLeft + bDir * farDistanceInnerLeft, Color.yellow);
//if (intersectsInnerRight)
// Debug.DrawLine(startRight + bDir * nearDistanceInnerRight, startRight + bDir * farDistanceInnerRight, Color.yellow);
float bestOffsetA = float.PositiveInfinity, bestOffsetB = float.PositiveInfinity;
bool any = false;
if (intersectsOuterLeft)
{
any |= checkRange(a, bDir, center, bDirLen, startLeft, nearDistanceOuterLeft, ref bestOffsetA, ref bestOffsetB);
//any |= checkRange(a, bDir, center, bDirLen, startLeft, farDistanceOuterLeft, ref bestOffsetA, ref bestOffsetB);
}
if (intersectsOuterRight)
{
any |= checkRange(a, bDir, center, bDirLen, startRight, nearDistanceOuterRight, ref bestOffsetA, ref bestOffsetB);
//any |= checkRange(a, bDir, center, bDirLen, startRight, farDistanceOuterRight, ref bestOffsetA, ref bestOffsetB);
}
if (intersectsInnerLeft)
{
//any |= checkRange(a, bDir, center, bDirLen, startLeft, nearDistanceInnerLeft, ref bestOffsetA, ref bestOffsetB);
any |= checkRange(a, bDir, center, bDirLen, startLeft, farDistanceInnerLeft, ref bestOffsetA, ref bestOffsetB);
}
if (intersectsInnerRight)
{
//any |= checkRange(a, bDir, center, bDirLen, startRight, nearDistanceInnerRight, ref bestOffsetA, ref bestOffsetB);
any |= checkRange(a, bDir, center, bDirLen, startRight, farDistanceInnerRight, ref bestOffsetA, ref bestOffsetB);
}
if (any)
{
offsetA = bestOffsetA;
offsetB = bestOffsetB;
return(true);
}
offsetA = offsetB = float.NaN;
return(false);
}
