public Matrix4x4 GetTransform(float distance)
{
if (distance > arc1.Length)
{
distance -= arc1.Length;
return(arc2.GetTransform(distance));
}
return(arc1.GetTransform(distance));
}
private static bool intersectsDiscrete(ILoftPath a, float widthA, ILoftPath b, float widthB, IntersectionMode mode, out float offsetA, out float offsetB)
{
widthA /= 2;
widthB /= 2;
// TODO: optimize!
var lenA = a.Length;
var lenB = b.Length;
var countA = Mathf.CeilToInt(lenA) / 4;
var countB = Mathf.CeilToInt(lenB) / 4;
var dA = lenA / countA;
var dB = lenB / countB;
var lTA = a.GetTransform(0);
for (int iA = 1; iA <= countA; iA++)
{
var oA = iA * lenA / countA;
var tA = a.GetTransform(oA);
var aLP = t2d(lTA.GetColumn(3));
var aLT = t2d(lTA.GetColumn(0)) * widthA;
var aCP = t2d(tA.GetColumn(3));
var aCT = t2d(tA.GetColumn(0)) * widthA;
var aD = aCP - aLP;
lTA = tA;
var lTB = b.GetTransform(0);
for (int iB = 1; iB <= countB; iB++)
{
var oB = iB * lenB / countB;
var tB = b.GetTransform(oB);
var bLP = t2d(lTB.GetColumn(3));
var bLT = t2d(lTB.GetColumn(0)) * widthB;
var bCP = t2d(tB.GetColumn(3));
var bCT = t2d(tB.GetColumn(0)) * widthB;
var bD = bCP - bLP;
lTB = tB;
//Debug.DrawLine(t3d(bLP), t3d(bCP), Color.white);
//Debug.DrawLine(t3d(aLP), t3d(aCP), Color.white);
//Debug.DrawLine(t3d(bLP + bLT * signB), t3d(bCP + bCT * signB), Color.cyan);
//Debug.DrawLine(t3d(aLP + aLT * signA), t3d(aCP + aCT * signA), Color.cyan);
//Debug.DrawLine(t3d(bLP - bLT * signB), t3d(bCP - bCT * signB), Color.magenta);
//Debug.DrawLine(t3d(aLP - aLT * signA), t3d(aCP - aCT * signA), Color.magenta);
var aS1 = aLP + aLT;
var bS1 = bLP + bLT;
var aS2 = aLP - aLT;
var bS2 = bLP - bLT;
var aD1 = (aCP + aCT) - aS1;
var bD1 = (bCP + bCT) - bS1;
var aD2 = (aCP - aCT) - aS2;
var bD2 = (bCP - bCT) - bS2;
//Debug.DrawLine(t3d(aS1, iA), t3d(aS1 + aD1, iA), Color.cyan);
//Debug.DrawLine(t3d(bS1, iA), t3d(bS1 + bD1, iA), Color.cyan);
//Debug.DrawLine(t3d(aS2, iA), t3d(aS2 + aD2, iA), Color.magenta);
//Debug.DrawLine(t3d(bS2, iA), t3d(bS2 + bD2, iA), Color.magenta);
if (mode == IntersectionMode.Edge)
{
if (intersectsDiscreteSegment(0, a, b, out offsetA, out offsetB, dA, dB, oA, oB, aS1, aD1, bS1, bD1))
{
return(true);
}
if (intersectsDiscreteSegment(1, a, b, out offsetA, out offsetB, dA, dB, oA, oB, aS2, aD2, bS2, bD2))
{
return(true);
}
if (intersectsDiscreteSegment(2, a, b, out offsetA, out offsetB, dA, dB, oA, oB, aS1, aD1, bS2, bD2))
{
return(true);
}
if (intersectsDiscreteSegment(3, a, b, out offsetA, out offsetB, dA, dB, oA, oB, aS2, aD2, bS1, bD1))
{
return(true);
}
}
else
{
if (intersectsDiscreteSegment(0, a, b, out offsetA, out offsetB, dA, dB, oA, oB, aLP, bLP, aCP - aLP, bCP - bLP))
{
return(true);
}
}
}
}
offsetA = offsetB = float.NaN;
return(false);
}
public static Matrix4x4 GetTransform(this ILoftPath loft, float distance, Matrix4x4 baseTransform)
{
return(baseTransform * loft.GetTransform(distance));
}
private static bool test(int a, int b, ILoftPath pathA, float startA, float scaleA, float widthA, ILoftPath pathB, float startB, float scaleB, float widthB, out float offsetA, out float offsetB)
{
var sA = startA + (a - 1) * scaleA;
var eA = startA + (a) * scaleA;
var sB = startB + (b - 1) * scaleB;
var eB = startB + (b) * scaleB;
var sAM = pathA.GetTransform(sA);
var eAM = pathA.GetTransform(eA);
var sBM = pathB.GetTransform(sB);
var eBM = pathB.GetTransform(eB);
var sAP = getPoint(sAM, 3);
var eAP = getPoint(eAM, 3);
var sAT = getPoint(sAM, 0);
var eAT = getPoint(eAM, 0);
var sBP = getPoint(sBM, 3);
var eBP = getPoint(eBM, 3);
var sBT = getPoint(sBM, 0);
var eBT = getPoint(eBM, 0);
var cA = (sAP + eAP) / 2;
var cB = (sBP + eBP) / 2;
var tA = cA - cB;
var tB = -tA;
var mA = Mathf.Sign(Vector2.Dot(tA, sAT)) * widthA;
var mB = Mathf.Sign(Vector2.Dot(tB, sBT)) * widthB;
eAP -= eAT * mA;
sAP -= sAT * mA;
eBP -= eBT * mB;
sBP -= sBT * mB;
var dA = eAP - sAP;
var dB = eBP - sBP;
VectorMath2D.IntersectsLineLine(sAP, dA, sBP, dB, out offsetA, out offsetB);
//Debug.DrawLine(t3d(sAP), t3d(eAP), Color.magenta);
//Debug.DrawLine(t3d(sBP), t3d(eBP), Color.cyan);
//Debug.DrawLine(t3d(cA + sAT), t3d(cA - sAT), Color.red);
//Debug.DrawLine(t3d(cB + sBT), t3d(cB - sBT), Color.blue);
//Debug.DrawLine(t3d(cB), t3d(cB), Color.yellow);
if (offsetA >= 0 && offsetB >= 0 && offsetA <= 1 && offsetB <= 1)
{
offsetA = sA + offsetA * scaleA;
offsetB = sB + offsetB * scaleB;
//var pA = pathA.GetTransformedPoint(offsetA, Vector3.zero);
//var pB = pathB.GetTransformedPoint(offsetB, Vector3.zero);
//Debug.DrawLine(pB, t3d(sAP), Color.red);
//Debug.DrawLine(pA, t3d(sBP), Color.blue);
return(true);
}
offsetA = offsetB = float.NaN;
return(false);
}
public static Vector3 GetTransformedPoint(this ILoftPath loft, float distance, Vector3 input)
{
var m = loft.GetTransform(distance);
return(m.MultiplyPoint3x4(input));
}
