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-rw-r--r--src/classes/share/javax/media/j3d/Utils.java734
1 files changed, 407 insertions, 327 deletions
diff --git a/src/classes/share/javax/media/j3d/Utils.java b/src/classes/share/javax/media/j3d/Utils.java
index 244edb5..276b1e5 100644
--- a/src/classes/share/javax/media/j3d/Utils.java
+++ b/src/classes/share/javax/media/j3d/Utils.java
@@ -110,332 +110,412 @@ private static final double ZERO_TOL = 1e-5d;
* http://www.geometrictools.com/LibMathematics/Distance/Wm5DistSegment3Segment3.cpp
* File Version: 5.0.1 (2010/10/01)
*/
-static public double segmentToSegment (Point3d s0start, Point3d s0end,
- Point3d s1start, Point3d s1end,
- Point3d s0int, Point3d s1int, double[] param) {
-// Vector3<Real> diff = mSegment0->Center - mSegment1->Center;
-// Real a01 = -mSegment0->Direction.Dot(mSegment1->Direction);
-// Real b0 = diff.Dot(mSegment0->Direction);
-// Real b1 = -diff.Dot(mSegment1->Direction);
-// Real c = diff.SquaredLength();
-// Real det = Math<Real>::FAbs((Real)1 - a01*a01);
-// Real s0, s1, sqrDist, extDet0, extDet1, tmpS0, tmpS1;
-//
-// if (det >= Math<Real>::ZERO_TOLERANCE)
-// {
-// // Segments are not parallel.
-// s0 = a01*b1 - b0;
-// s1 = a01*b0 - b1;
-// extDet0 = mSegment0->Extent*det;
-// extDet1 = mSegment1->Extent*det;
-//
-// if (s0 >= -extDet0)
-// {
-// if (s0 <= extDet0)
-// {
-// if (s1 >= -extDet1)
-// {
-// if (s1 <= extDet1) // region 0 (interior)
-// {
-// // Minimum at interior points of segments.
-// Real invDet = ((Real)1)/det;
-// s0 *= invDet;
-// s1 *= invDet;
-// sqrDist = s0*(s0 + a01*s1 + ((Real)2)*b0) +
-// s1*(a01*s0 + s1 + ((Real)2)*b1) + c;
-// }
-// else // region 3 (side)
-// {
-// s1 = mSegment1->Extent;
-// tmpS0 = -(a01*s1 + b0);
-// if (tmpS0 < -mSegment0->Extent)
-// {
-// s0 = -mSegment0->Extent;
-// sqrDist = s0*(s0 - ((Real)2)*tmpS0) +
-// s1*(s1 + ((Real)2)*b1) + c;
-// }
-// else if (tmpS0 <= mSegment0->Extent)
-// {
-// s0 = tmpS0;
-// sqrDist = -s0*s0 + s1*(s1 + ((Real)2)*b1) + c;
-// }
-// else
-// {
-// s0 = mSegment0->Extent;
-// sqrDist = s0*(s0 - ((Real)2)*tmpS0) +
-// s1*(s1 + ((Real)2)*b1) + c;
-// }
-// }
-// }
-// else // region 7 (side)
-// {
-// s1 = -mSegment1->Extent;
-// tmpS0 = -(a01*s1 + b0);
-// if (tmpS0 < -mSegment0->Extent)
-// {
-// s0 = -mSegment0->Extent;
-// sqrDist = s0*(s0 - ((Real)2)*tmpS0) +
-// s1*(s1 + ((Real)2)*b1) + c;
-// }
-// else if (tmpS0 <= mSegment0->Extent)
-// {
-// s0 = tmpS0;
-// sqrDist = -s0*s0 + s1*(s1 + ((Real)2)*b1) + c;
-// }
-// else
-// {
-// s0 = mSegment0->Extent;
-// sqrDist = s0*(s0 - ((Real)2)*tmpS0) +
-// s1*(s1 + ((Real)2)*b1) + c;
-// }
-// }
-// }
-// else
-// {
-// if (s1 >= -extDet1)
-// {
-// if (s1 <= extDet1) // region 1 (side)
-// {
-// s0 = mSegment0->Extent;
-// tmpS1 = -(a01*s0 + b1);
-// if (tmpS1 < -mSegment1->Extent)
-// {
-// s1 = -mSegment1->Extent;
-// sqrDist = s1*(s1 - ((Real)2)*tmpS1) +
-// s0*(s0 + ((Real)2)*b0) + c;
-// }
-// else if (tmpS1 <= mSegment1->Extent)
-// {
-// s1 = tmpS1;
-// sqrDist = -s1*s1 + s0*(s0 + ((Real)2)*b0) + c;
-// }
-// else
-// {
-// s1 = mSegment1->Extent;
-// sqrDist = s1*(s1 - ((Real)2)*tmpS1) +
-// s0*(s0 + ((Real)2)*b0) + c;
-// }
-// }
-// else // region 2 (corner)
-// {
-// s1 = mSegment1->Extent;
-// tmpS0 = -(a01*s1 + b0);
-// if (tmpS0 < -mSegment0->Extent)
-// {
-// s0 = -mSegment0->Extent;
-// sqrDist = s0*(s0 - ((Real)2)*tmpS0) +
-// s1*(s1 + ((Real)2)*b1) + c;
-// }
-// else if (tmpS0 <= mSegment0->Extent)
-// {
-// s0 = tmpS0;
-// sqrDist = -s0*s0 + s1*(s1 + ((Real)2)*b1) + c;
-// }
-// else
-// {
-// s0 = mSegment0->Extent;
-// tmpS1 = -(a01*s0 + b1);
-// if (tmpS1 < -mSegment1->Extent)
-// {
-// s1 = -mSegment1->Extent;
-// sqrDist = s1*(s1 - ((Real)2)*tmpS1) +
-// s0*(s0 + ((Real)2)*b0) + c;
-// }
-// else if (tmpS1 <= mSegment1->Extent)
-// {
-// s1 = tmpS1;
-// sqrDist = -s1*s1 + s0*(s0 + ((Real)2)*b0) + c;
-// }
-// else
-// {
-// s1 = mSegment1->Extent;
-// sqrDist = s1*(s1 - ((Real)2)*tmpS1) +
-// s0*(s0 + ((Real)2)*b0) + c;
-// }
-// }
-// }
-// }
-// else // region 8 (corner)
-// {
-// s1 = -mSegment1->Extent;
-// tmpS0 = -(a01*s1 + b0);
-// if (tmpS0 < -mSegment0->Extent)
-// {
-// s0 = -mSegment0->Extent;
-// sqrDist = s0*(s0 - ((Real)2)*tmpS0) +
-// s1*(s1 + ((Real)2)*b1) + c;
-// }
-// else if (tmpS0 <= mSegment0->Extent)
-// {
-// s0 = tmpS0;
-// sqrDist = -s0*s0 + s1*(s1 + ((Real)2)*b1) + c;
-// }
-// else
-// {
-// s0 = mSegment0->Extent;
-// tmpS1 = -(a01*s0 + b1);
-// if (tmpS1 > mSegment1->Extent)
-// {
-// s1 = mSegment1->Extent;
-// sqrDist = s1*(s1 - ((Real)2)*tmpS1) +
-// s0*(s0 + ((Real)2)*b0) + c;
-// }
-// else if (tmpS1 >= -mSegment1->Extent)
-// {
-// s1 = tmpS1;
-// sqrDist = -s1*s1 + s0*(s0 + ((Real)2)*b0) + c;
-// }
-// else
-// {
-// s1 = -mSegment1->Extent;
-// sqrDist = s1*(s1 - ((Real)2)*tmpS1) +
-// s0*(s0 + ((Real)2)*b0) + c;
-// }
-// }
-// }
-// }
-// }
-// else
-// {
-// if (s1 >= -extDet1)
-// {
-// if (s1 <= extDet1) // region 5 (side)
-// {
-// s0 = -mSegment0->Extent;
-// tmpS1 = -(a01*s0 + b1);
-// if (tmpS1 < -mSegment1->Extent)
-// {
-// s1 = -mSegment1->Extent;
-// sqrDist = s1*(s1 - ((Real)2)*tmpS1) +
-// s0*(s0 + ((Real)2)*b0) + c;
-// }
-// else if (tmpS1 <= mSegment1->Extent)
-// {
-// s1 = tmpS1;
-// sqrDist = -s1*s1 + s0*(s0 + ((Real)2)*b0) + c;
-// }
-// else
-// {
-// s1 = mSegment1->Extent;
-// sqrDist = s1*(s1 - ((Real)2)*tmpS1) +
-// s0*(s0 + ((Real)2)*b0) + c;
-// }
-// }
-// else // region 4 (corner)
-// {
-// s1 = mSegment1->Extent;
-// tmpS0 = -(a01*s1 + b0);
-// if (tmpS0 > mSegment0->Extent)
-// {
-// s0 = mSegment0->Extent;
-// sqrDist = s0*(s0 - ((Real)2)*tmpS0) +
-// s1*(s1 + ((Real)2)*b1) + c;
-// }
-// else if (tmpS0 >= -mSegment0->Extent)
-// {
-// s0 = tmpS0;
-// sqrDist = -s0*s0 + s1*(s1 + ((Real)2)*b1) + c;
-// }
-// else
-// {
-// s0 = -mSegment0->Extent;
-// tmpS1 = -(a01*s0 + b1);
-// if (tmpS1 < -mSegment1->Extent)
-// {
-// s1 = -mSegment1->Extent;
-// sqrDist = s1*(s1 - ((Real)2)*tmpS1) +
-// s0*(s0 + ((Real)2)*b0) + c;
-// }
-// else if (tmpS1 <= mSegment1->Extent)
-// {
-// s1 = tmpS1;
-// sqrDist = -s1*s1 + s0*(s0 + ((Real)2)*b0) + c;
-// }
-// else
-// {
-// s1 = mSegment1->Extent;
-// sqrDist = s1*(s1 - ((Real)2)*tmpS1) +
-// s0*(s0 + ((Real)2)*b0) + c;
-// }
-// }
-// }
-// }
-// else // region 6 (corner)
-// {
-// s1 = -mSegment1->Extent;
-// tmpS0 = -(a01*s1 + b0);
-// if (tmpS0 > mSegment0->Extent)
-// {
-// s0 = mSegment0->Extent;
-// sqrDist = s0*(s0 - ((Real)2)*tmpS0) +
-// s1*(s1 + ((Real)2)*b1) + c;
-// }
-// else if (tmpS0 >= -mSegment0->Extent)
-// {
-// s0 = tmpS0;
-// sqrDist = -s0*s0 + s1*(s1 + ((Real)2)*b1) + c;
-// }
-// else
-// {
-// s0 = -mSegment0->Extent;
-// tmpS1 = -(a01*s0 + b1);
-// if (tmpS1 < -mSegment1->Extent)
-// {
-// s1 = -mSegment1->Extent;
-// sqrDist = s1*(s1 - ((Real)2)*tmpS1) +
-// s0*(s0 + ((Real)2)*b0) + c;
-// }
-// else if (tmpS1 <= mSegment1->Extent)
-// {
-// s1 = tmpS1;
-// sqrDist = -s1*s1 + s0*(s0 + ((Real)2)*b0) + c;
-// }
-// else
-// {
-// s1 = mSegment1->Extent;
-// sqrDist = s1*(s1 - ((Real)2)*tmpS1) +
-// s0*(s0 + ((Real)2)*b0) + c;
-// }
-// }
-// }
-// }
-// }
-// else
-// {
-// // The segments are parallel. The average b0 term is designed to
-// // ensure symmetry of the function. That is, dist(seg0,seg1) and
-// // dist(seg1,seg0) should produce the same number.
-// Real e0pe1 = mSegment0->Extent + mSegment1->Extent;
-// Real sign = (a01 > (Real)0 ? (Real)-1 : (Real)1);
-// Real b0Avr = ((Real)0.5)*(b0 - sign*b1);
-// Real lambda = -b0Avr;
-// if (lambda < -e0pe1)
-// {
-// lambda = -e0pe1;
-// }
-// else if (lambda > e0pe1)
-// {
-// lambda = e0pe1;
-// }
-//
-// s1 = -sign*lambda*mSegment1->Extent/e0pe1;
-// s0 = lambda + sign*s1;
-// sqrDist = lambda*(lambda + ((Real)2)*b0Avr) + c;
-// }
-//
-// mClosestPoint0 = mSegment0->Center + s0*mSegment0->Direction;
-// mClosestPoint1 = mSegment1->Center + s1*mSegment1->Direction;
-// mSegment0Parameter = s0;
-// mSegment1Parameter = s1;
-//
-// // Account for numerical round-off errors.
-// if (sqrDist < (Real)0)
-// {
-// sqrDist = (Real)0;
-// }
-// return sqrDist;
-//}
- return 0.0d;
+static public double segmentToSegment(Point3d s0start, Point3d s0end,
+ Point3d s1start, Point3d s1end,
+ Point3d s0int, Point3d s1int, double[] param) {
+ double s, t;
+
+ Vector3d diff = new Vector3d();
+ diff.sub(s0start, s1start);
+
+ Vector3d seg0dir = new Vector3d();
+ seg0dir.sub(s0end, s0start);
+ Vector3d seg1dir = new Vector3d();
+ seg1dir.sub(s1end, s1start);
+
+ double A = seg0dir.dot(seg0dir); // Dot(seg0dir,seg0dir);
+ double B = -seg0dir.dot(seg1dir); // -Dot(seg0dir,seg1dir);
+ double C = seg1dir.dot(seg1dir); // Dot(seg1dir,seg1dir);
+ double D = seg0dir.dot(diff); // Dot(seg0dir,diff);
+ double E; // -Dot(seg1dir,diff), defer until needed
+ double F = diff.dot(diff); // Dot(diff,diff);
+ double det = Math.abs(A * C - B * B); // A*C-B*B = |Cross(M0,M1)|^2 >= 0
+
+ double tmp;
+
+ if (det >= ZERO_TOL) {
+ // line segments are not parallel
+ E = -seg1dir.dot(diff); // -Dot(seg1dir,diff);
+ s = B * E - C * D;
+ t = B * D - A * E;
+
+ if (s >= 0) {
+ if (s <= det) {
+ if (t >= 0) {
+ if (t <= det) { // region 0 (interior)
+ // minimum at two interior points of 3D lines
+ double invDet = 1.0f / det;
+ s *= invDet;
+ t *= invDet;
+ if (s0int != null) s0int.scaleAdd(s, seg0dir, s0start);
+ if (s1int != null) s1int.scaleAdd(t, seg1dir, s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(s * (A * s + B * t + 2 * D) + t
+ * (B * s + C * t + 2 * E) + F);
+ }
+ else { // region 3 (side)
+ t = 1;
+ tmp = B + D;
+ if (tmp >= 0) {
+ s = 0;
+ if (s0int != null) s0int.set(s0start);
+ if (s1int != null) s1int.set(s1end);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(C + 2 * E + F);
+ }
+ else if (-tmp >= A) {
+ s = 1;
+ if (s0int != null) s0int.set(s0end);
+ if (s1int != null) s1int.set(s1end);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(A + C + F + 2 * (E + tmp));
+ }
+ else {
+ s = -tmp / A;
+ if (s0int != null) s0int.scaleAdd(s, seg0dir, s0start);
+ if (s1int != null) s1int.set(s1end);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(tmp * s + C + 2 * E + F);
+ }
+ }
+ }
+ else { // region 7 (side)
+ t = 0;
+ if (D >= 0) {
+ s = 0;
+ if (s0int != null) s0int.set(s0start);
+ if (s1int != null) s1int.set(s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(F);
+ }
+ else if (-D >= A) {
+ s = 1;
+ if (s0int != null) s0int.set(s0end);
+ if (s1int != null) s1int.set(s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(A + 2 * D + F);
+ }
+ else {
+ s = -D / A;
+ if (s0int != null) s0int.scaleAdd(s, seg0dir, s0start);
+ if (s1int != null) s1int.set(s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(D * s + F);
+ }
+ }
+ }
+ else {
+ if (t >= 0) {
+ if (t <= det) { // region 1 (side)
+ s = 1;
+ tmp = B + E;
+ if (tmp >= 0) {
+ t = 0;
+ if (s0int != null) s0int.set(s0end);
+ if (s1int != null) s1int.set(s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(A + 2 * D + F);
+ }
+ else if (-tmp >= C) {
+ t = 1;
+ if (s0int != null) s0int.set(s0end);
+ if (s1int != null) s1int.set(s1end);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(A + C + F + 2 * (D + tmp));
+ }
+ else {
+ t = -tmp / C;
+ if (s0int != null) s0int.set(s0end);
+ if (s1int != null) s1int.scaleAdd(t, seg1dir, s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(tmp * t + A + 2 * D + F);
+ }
+ }
+ else { // region 2 (corner)
+ tmp = B + D;
+ if (-tmp <= A) {
+ t = 1;
+ if (tmp >= 0) {
+ s = 0;
+ if (s0int != null) s0int.set(s0start);
+ if (s1int != null) s1int.set(s1end);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(C + 2 * E + F);
+ }
+ else {
+ s = -tmp / A;
+ if (s0int != null) s0int.scaleAdd(s, seg0dir, s0start);
+ if (s1int != null) s1int.set(s1end);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(tmp * s + C + 2 * E + F);
+ }
+ }
+ else {
+ s = 1;
+ tmp = B + E;
+ if (tmp >= 0) {
+ t = 0;
+ if (s0int != null) s0int.set(s0end);
+ if (s1int != null) s1int.set(s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(A + 2 * D + F);
+ }
+ else if (-tmp >= C) {
+ t = 1;
+ if (s0int != null) s0int.set(s0end);
+ if (s1int != null) s1int.set(s1end);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(A + C + F + 2 * (D + tmp));
+ }
+ else {
+ t = -tmp / C;
+ if (s0int != null) s0int.set(s0end);
+ if (s1int != null) s1int.scaleAdd(t, seg1dir, s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(tmp * t + A + 2 * D + F);
+ }
+ }
+ }
+ }
+ else { // region 8 (corner)
+ if (-D < A) {
+ t = 0;
+ if (D >= 0) {
+ s = 0;
+ if (s0int != null) s0int.set(s0start);
+ if (s1int != null) s1int.set(s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(F);
+ }
+ else {
+ s = -D / A;
+ if (s0int != null) s0int.scaleAdd(s, seg0dir, s0start);
+ if (s1int != null) s1int.set(s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(D * s + F);
+ }
+ }
+ else {
+ s = 1;
+ tmp = B + E;
+ if (tmp >= 0) {
+ t = 0;
+ if (s0int != null) s0int.set(s0end);
+ if (s1int != null) s1int.set(s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(A + 2 * D + F);
+ }
+ else if (-tmp >= C) {
+ t = 1;
+ if (s0int != null) s0int.set(s0end);
+ if (s1int != null) s1int.set(s1end);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(A + C + F + 2 * (D + tmp));
+ }
+ else {
+ t = -tmp / C;
+ if (s0int != null) s0int.set(s0end);
+ if (s1int != null) s1int.scaleAdd(t, seg1dir, s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(tmp * t + A + 2 * D + F);
+ }
+ }
+ }
+ }
+ }
+ else {
+ if (t >= 0) {
+ if (t <= det) { // region 5 (side)
+ s = 0;
+ if (E >= 0) {
+ t = 0;
+ if (s0int != null) s0int.set(s0start);
+ if (s1int != null) s1int.set(s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(F);
+ }
+ else if (-E >= C) {
+ t = 1;
+ if (s0int != null) s0int.set(s0start);
+ if (s1int != null) s1int.set(s1end);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(C + 2 * E + F);
+ }
+ else {
+ t = -E / C;
+ if (s0int != null) s0int.set(s0start);
+ if (s1int != null) s1int.scaleAdd(t, seg1dir, s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(E * t + F);
+ }
+ }
+ else { // region 4 (corner)
+ tmp = B + D;
+ if (tmp < 0) {
+ t = 1;
+ if (-tmp >= A) {
+ s = 1;
+ if (s0int != null) s0int.set(s0end);
+ if (s1int != null) s1int.set(s1end);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(A + C + F + 2 * (E + tmp));
+ }
+ else {
+ s = -tmp / A;
+ if (s0int != null) s0int.scaleAdd(s, seg0dir, s0start);
+ if (s1int != null) s1int.set(s1end);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(tmp * s + C + 2 * E + F);
+ }
+ }
+ else {
+ s = 0;
+ if (E >= 0) {
+ t = 0;
+ if (s0int != null) s0int.set(s0start);
+ if (s1int != null) s1int.set(s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(F);
+ }
+ else if (-E >= C) {
+ t = 1;
+ if (s0int != null) s0int.set(s0start);
+ if (s1int != null) s1int.set(s1end);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(C + 2 * E + F);
+ }
+ else {
+ t = -E / C;
+ if (s0int != null) s0int.set(s0start);
+ if (s1int != null) s1int.scaleAdd(t, seg1dir, s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(E * t + F);
+ }
+ }
+ }
+ }
+ else { // region 6 (corner)
+ if (D < 0) {
+ t = 0;
+ if (-D >= A) {
+ s = 1;
+ if (s0int != null) s0int.set(s0end);
+ if (s1int != null) s1int.set(s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(A + 2 * D + F);
+ }
+ else {
+ s = -D / A;
+ if (s0int != null) s0int.scaleAdd(s, seg0dir, s0start);
+ if (s1int != null) s1int.set(s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(D * s + F);
+ }
+ }
+ else {
+ s = 0;
+ if (E >= 0) {
+ t = 0;
+ if (s0int != null) s0int.set(s0start);
+ if (s1int != null) s1int.set(s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(F);
+ }
+ else if (-E >= C) {
+ t = 1;
+ if (s0int != null) s0int.set(s0start);
+ if (s1int != null) s1int.set(s1end);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(C + 2 * E + F);
+ }
+ else {
+ t = -E / C;
+ if (s0int != null) s0int.set(s0start);
+ if (s1int != null) s1int.scaleAdd(t, seg1dir, s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(E * t + F);
+ }
+ }
+ }
+ }
+ }
+ else {
+ // line segments are parallel
+ if (B > 0) {
+ // direction vectors form an obtuse angle
+ if (D >= 0) {
+ s = 0;
+ t = 0;
+ if (s0int != null) s0int.set(s0start);
+ if (s1int != null) s1int.set(s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(F);
+ }
+ else if (-D <= A) {
+ s = -D / A;
+ t = 0;
+ if (s0int != null) s0int.scaleAdd(s, seg0dir, s0start);
+ if (s1int != null) s1int.set(s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(D * s + F);
+ }
+ else {
+ E = -seg1dir.dot(diff); // -Dot(seg1dir,diff);
+ s = 1;
+ tmp = A + D;
+ if (-tmp >= B) {
+ t = 1;
+ if (s0int != null) s0int.set(s0end);
+ if (s1int != null) s1int.set(s1end);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(A + C + F + 2 * (B + D + E));
+ }
+ else {
+ t = -tmp / B;
+ if (s0int != null) s0int.set(s0end);
+ if (s1int != null) s1int.scaleAdd(t, seg1dir, s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(A + 2 * D + F + t * (C * t + 2 * (B + E)));
+ }
+ }
+ }
+ else {
+ // direction vectors form an acute angle
+ if (-D >= A) {
+ s = 1;
+ t = 0;
+ if (s0int != null) s0int.set(s0end);
+ if (s1int != null) s1int.set(s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(A + 2 * D + F);
+ }
+ else if (D <= 0) {
+ s = -D / A;
+ t = 0;
+ if (s0int != null) s0int.scaleAdd(s, seg0dir, s0start);
+ if (s1int != null) s1int.set(s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(D * s + F);
+ }
+ else {
+ E = -seg1dir.dot(diff); // -Dot(seg1dir,diff);
+ s = 0;
+ if (D >= -B) {
+ t = 1;
+ if (s0int != null) s0int.set(s0start);
+ if (s1int != null) s1int.set(s1end);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(C + 2 * E + F);
+ }
+ else {
+ t = -D / B;
+ if (s0int != null) s0int.set(s0start);
+ if (s1int != null) s1int.scaleAdd(t, seg1dir, s1start);
+ if (param != null) { param[0] = s; param[1] = t; }
+ return Math.abs(F + t * (2 * E + C * t));
+ }
+ }
+ }
+ }
}
}
-
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 15:45:15 +0000