public VisionData calc(
VisionData cache,
TileArrayIntersections<? extends Occluder> fixedOccludersTileArrayIntersections,
List<? extends Occluder> movingOccluders) {
KPolygon boundaryPolygon = cache.getBoundaryPolygon();
ArrayList<? extends Occluder> fixedOccluders =
fixedOccludersTileArrayIntersections.getAllWithin(
boundaryPolygon.getCenter(), boundaryPolygon.getRadius());
ArrayList<VPOccluderOccluderIntersection> fixedOccludersIntersectionPoints =
fixedOccludersTileArrayIntersections.getIntersectionsWithinAtLeast(
boundaryPolygon.getCenter(), boundaryPolygon.getRadius());
return calc(cache, fixedOccluders, fixedOccludersIntersectionPoints, movingOccluders);
}
// CodeTimer codeTimer = new CodeTimer("calc", CodeTimer.Output.Millis, CodeTimer.Output.Millis);
// {
// codeTimer.setEnabled(true);
// }
public VisionData calc(
VisionData cache,
List<? extends Occluder> fixedOccluders,
List<VPOccluderOccluderIntersection> fixedOccludersIntersectionPoints,
List<? extends Occluder> movingOccluders) {
Vector2f eye = cache.eye;
KPolygon boundaryPolygon = cache.boundaryPolygon;
cache.visiblePoints = null;
cache.visiblePolygon = null;
int[] boundaryPolygonXIndicators = cache.boundaryPolygonXIndicators;
int[] boundaryPolygonYIndicators = cache.boundaryPolygonYIndicators;
double maxEyeToBoundaryPolygonPointDist = cache.maxEyeToBoundaryPolygonPointDist;
double minEyeToBoundaryPolygonPointDist = cache.minEyeToBoundaryPolygonPointDist;
double maxEyeToBoundaryPolygonPointDistSq = cache.maxEyeToBoundaryPolygonPointDistSq;
double minEyeToBoundaryPolygonPointDistSq = cache.minEyeToBoundaryPolygonPointDistSq;
// double[] boundaryPolygonPointAngles = cache.boundaryPolygonPointAngles;
// double boundaryPolygonRotationAroundEye = cache.getBoundaryPolygonRotationAroundEye();
ArrayList<Vector2f> boundaryPolygonPoints = boundaryPolygon.getPoints();
ArrayList<VisiblePoint> visiblePoints =
new ArrayList<VisiblePoint>(
boundaryPolygonPoints.size()); // size is likely to be boundaryPolygon.size() or more.
// codeTimer.click("polygonAndDists clear");
polygonAndDists.clear();
// codeTimer.click("polygonAndDists");
// add the fixedPolygons to polygonAndDists
for (int n = 0; n < fixedOccluders.size(); n++) {
Occluder occluder = fixedOccluders.get(n);
KPolygon poly = occluder.getPolygon();
double distCenterToEyeLessCircBound = eye.distance(poly.getCenter()) - poly.getRadius();
double distCenterToEyeLessCircBoundSq =
distCenterToEyeLessCircBound * distCenterToEyeLessCircBound;
if (distCenterToEyeLessCircBound < 0) {
distCenterToEyeLessCircBoundSq *= -1;
}
int xIndicator = getXIndicator(poly, eye);
int yIndicator = getYIndicator(poly, eye);
OccluderDistAndQuad polygonAndDist =
new OccluderDistAndQuad(
occluder,
distCenterToEyeLessCircBound,
distCenterToEyeLessCircBoundSq,
xIndicator,
yIndicator);
polygonAndDists.add(polygonAndDist);
}
// add the movingPolygons to polygonAndDists
for (int n = 0; n < movingOccluders.size(); n++) {
Occluder occluder = movingOccluders.get(n);
KPolygon poly = occluder.getPolygon();
double distCenterToEyeLessCircBound = eye.distance(poly.getCenter()) - poly.getRadius();
double distCenterToEyeLessCircBoundSq =
distCenterToEyeLessCircBound * distCenterToEyeLessCircBound;
if (distCenterToEyeLessCircBound < 0) {
distCenterToEyeLessCircBoundSq *= -1;
}
int xIndicator = getXIndicator(poly, eye);
int yIndicator = getYIndicator(poly, eye);
OccluderDistAndQuad polygonAndDist =
new OccluderDistAndQuad(
occluder,
distCenterToEyeLessCircBound,
distCenterToEyeLessCircBoundSq,
xIndicator,
yIndicator);
polygonAndDists.add(polygonAndDist);
}
// codeTimer.click("sort");
// Sort the list.
Collections.sort(polygonAndDists);
// codeTimer.click();
// codeTimer.click("visiblePoints clear");
visiblePoints.clear();
// codeTimer.click("Add occluder points");
// Add occluder points
for (int i = 0; i < polygonAndDists.size(); i++) {
OccluderDistAndQuad polygonAndDist = polygonAndDists.get(i);
// check if it's possible for occluder to be inside the boundaryPolygon
if (polygonAndDist.getDistEyeToCenterLessRadius() > maxEyeToBoundaryPolygonPointDist) {
continue;
}
KPolygon polygon = polygonAndDist.getPolygon();
ArrayList<Vector2f> points = polygon.getPoints();
boolean allPointsInsideBoundaryPolygon =
(polygonAndDist.getDistEyeToCenterLessRadius() + 2 * polygon.getRadius())
< minEyeToBoundaryPolygonPointDist;
PointLoop:
for (int j = 0; j < points.size(); j++) {
Vector2f p = points.get(j);
double eyeToPDistSq = eye.distanceSquared(p);
// Only add occluder points if they're inside the boundaryPolygon and they're unobstructed.
if (allPointsInsideBoundaryPolygon == false) {
// The polygon points may not all be inside the boundaryPolygon so need to check that this
// point is using the contains method.
if (eyeToPDistSq > maxEyeToBoundaryPolygonPointDistSq) {
continue;
} else if (eyeToPDistSq >= minEyeToBoundaryPolygonPointDistSq) {
if (boundaryPolygon.contains(p) == false) {
continue;
}
}
}
// check if the line from the eye to the polygon point intersects other lines that make up
// the polygon
for (int m = 0; m < points.size(); m++) {
int nextM = (m + 1 >= points.size() ? 0 : m + 1);
if (j == m || j == nextM) {
continue;
}
if (Vector2fUtils.linesIntersect(p, eye, points.get(m), points.get(nextM))) {
continue PointLoop;
}
}
// check if the line from the eye to the polygon point intersects other polygons
for (int k = 0; k < polygonAndDists.size(); k++) {
OccluderDistAndQuad polygonAndDist2 = polygonAndDists.get(k);
if (polygonAndDist == polygonAndDist2) {
// check if the line from the eye to the polygon point intersects other lines that make
// up the polygon
// for (int m = 0; m < points.size(); m++){
// int nextM = (m+1 >= points.size() ? 0 : m+1);
// if (j == m || j == nextM){
// continue;
// }
// if (KPolygon.isValidNoLineIntersections(p, eye, points.get(m),
// points.get(nextM))){
// continue PointLoop;
// }
// }
continue;
}
if (polygonAndDist2.getDistEyeToCenterLessRadiusSqSigned() > eyeToPDistSq) {
break;
}
if (polygonAndDist.getXIndicator() * polygonAndDist2.getXIndicator() == -1
|| polygonAndDist.getYIndicator() * polygonAndDist2.getYIndicator() == -1) {
continue;
}
KPolygon polygon2 = polygonAndDist2.getPolygon();
if (polygon2.intersectionPossible(p, eye) && polygon2.intersectsLine(p, eye)) {
continue PointLoop;
}
}
// double angleRelativeToEye = eye.findAngle(p);
// VisiblePoint vp = new VPOccluder(p, polygonAndDist.getOccluder(), j, angleRelativeToEye);
VisiblePoint vp = new VPOccluder(p, polygonAndDist.getOccluder(), j);
visiblePoints.add(vp);
}
}
// codeTimer.click("Find intersection between occluders and the boundaryPolygon");
// Add all points of intersection between occluders and the boundaryPolygon
boundaryOccluderIntersectionPoints.clear();
{
for (int j = 0; j < boundaryPolygonPoints.size(); j++) {
Vector2f p = boundaryPolygonPoints.get(j);
int jPlus = (j + 1 >= boundaryPolygonPoints.size() ? 0 : j + 1);
Vector2f p2 = boundaryPolygonPoints.get(jPlus);
int xIndicator = getXIndicator(p, p2, eye);
int yIndicator = getYIndicator(p, p2, eye);
boundaryPolygonXIndicators[j] = xIndicator;
boundaryPolygonYIndicators[j] = yIndicator;
for (int k = 0; k < polygonAndDists.size(); k++) {
OccluderDistAndQuad polygonAndDist = polygonAndDists.get(k);
KPolygon polygon = polygonAndDist.getPolygon();
if ((xIndicator * polygonAndDist.getXIndicator() == -1
|| yIndicator * polygonAndDist.getYIndicator() == -1)
== true) {
continue;
}
if (polygon.intersectionPossible(p, p2) == false) {
// intersection is not possible, so skip to next occluder.
continue;
}
ArrayList<Vector2f> points = polygon.getPoints();
for (int i = 0; i < points.size(); i++) {
int nextI = (i + 1 >= points.size() ? 0 : i + 1);
Vector2f p3 = points.get(i);
Vector2f p4 = points.get(nextI);
if (Vector2fUtils.linesIntersect(p, p2, p3, p4)) {
Vector2f intersection = Vector2fUtils.getLineLineIntersection(p, p2, p3, p4);
if (intersection != null) {
boundaryOccluderIntersectionPoints.add(
new VPOccluderBoundaryIntersection(
intersection, polygonAndDist.getOccluder(), i));
}
}
}
}
}
}
// codeTimer.click("Only add boundary-occluder intersection points that are unoccluded");
// Only add boundary-occluder intersection points that are unoccluded
OuterLoop:
for (int j = 0; j < boundaryOccluderIntersectionPoints.size(); j++) {
VPOccluderBoundaryIntersection visiblePoint = boundaryOccluderIntersectionPoints.get(j);
Vector2f p = visiblePoint.getPoint();
// see if the occluder that makes this visiblePoint intersection occludes this point from the
// eye.
ArrayList<Vector2f> points = visiblePoint.getPolygon().getPoints();
for (int m = 0; m < points.size(); m++) {
int nextM = (m + 1 >= points.size() ? 0 : m + 1);
if (visiblePoint.getPolygonPointNum() == m) {
continue;
}
if (Vector2fUtils.linesIntersect(p, eye, points.get(m), points.get(nextM))) {
continue OuterLoop;
}
}
int xIndicator = getXIndicator(p, eye);
int yIndicator = getYIndicator(p, eye);
// see if any other occluders cause an obstruction
double eyeToPDistSq = eye.distanceSquared(p);
for (int k = 0; k < polygonAndDists.size(); k++) {
OccluderDistAndQuad polygonAndDist2 = polygonAndDists.get(k);
KPolygon polygon2 = polygonAndDists.get(k).getPolygon();
if (visiblePoint.getPolygon() == polygon2) {
continue;
}
if (polygonAndDists.get(k).getDistEyeToCenterLessRadiusSqSigned() > eyeToPDistSq) {
break;
}
if (xIndicator * polygonAndDist2.getXIndicator() == -1
|| yIndicator * polygonAndDist2.getYIndicator() == -1) {
continue;
}
if (polygon2.intersectionPossible(p, eye) && polygon2.intersectsLine(p, eye)) {
continue OuterLoop;
}
}
visiblePoints.add(visiblePoint);
}
// codeTimer.click("movingOccluders intersections");
boundaryOccluderIntersectionPoints.clear();
// Add all points of intersection between movingOccluders and fixedOccluders and other
// movingOccluders
occluderIntersectionPoints.clear();
occluderIntersectionPoints.addAll(fixedOccludersIntersectionPoints);
for (int i = 0; i < movingOccluders.size(); i++) {
Occluder occluder = movingOccluders.get(i);
KPolygon polygon = occluder.getPolygon();
if (boundaryPolygon.getCenter().distance(polygon.getCenter())
> boundaryPolygon.getRadius() + polygon.getRadius()) {
continue;
}
for (int j = 0; j < polygon.getPoints().size(); j++) {
Vector2f p = polygon.getPoints().get(j);
int jPlus = (j + 1 >= polygon.getPoints().size() ? 0 : j + 1);
Vector2f p2 = polygon.getPoints().get(jPlus);
// first intersect with other movingPolygons
for (int k = i + 1; k < movingOccluders.size(); k++) {
Occluder occluder2 = movingOccluders.get(k);
KPolygon polygon2 = occluder2.getPolygon();
if (polygon2.intersectionPossible(p, p2) == false) {
// intersection is not possible, so skip to next occluder.
continue;
}
ArrayList<Vector2f> points = polygon2.getPoints();
for (int m = 0; m < points.size(); m++) {
int nextM = (m + 1 >= points.size() ? 0 : m + 1);
if (Vector2fUtils.linesIntersect(p, p2, points.get(m), points.get(nextM))) {
Vector2f intersection =
Vector2fUtils.getLineLineIntersection(p, p2, points.get(m), points.get(nextM));
if (intersection != null) {
occluderIntersectionPoints.add(
new VPOccluderOccluderIntersection(intersection, occluder, j, occluder2, m));
}
}
}
}
// intersect with fixedPolygons
for (int k = 0; k < fixedOccluders.size(); k++) {
Occluder occluder2 = fixedOccluders.get(k);
KPolygon polygon2 = occluder2.getPolygon();
if (polygon2.intersectionPossible(p, p2) == false) {
// intersection is not possible, so skip to next occluder.
continue;
}
ArrayList<Vector2f> points = polygon2.getPoints();
for (int m = 0; m < points.size(); m++) {
int nextM = (m + 1 >= points.size() ? 0 : m + 1);
if (Vector2fUtils.linesIntersect(p, p2, points.get(m), points.get(nextM))) {
Vector2f intersection =
Vector2fUtils.getLineLineIntersection(p, p2, points.get(m), points.get(nextM));
if (intersection != null) {
occluderIntersectionPoints.add(
new VPOccluderOccluderIntersection(intersection, occluder, j, occluder2, m));
}
}
}
}
}
}
// codeTimer.click("take out occluder points unobstructed");
// only add occluder intersection points that are unobstructed
OuterLoop:
for (int j = 0; j < occluderIntersectionPoints.size(); j++) {
VPOccluderOccluderIntersection visiblePoint = occluderIntersectionPoints.get(j);
Vector2f p = visiblePoint.getPoint();
// it's not guaranteed that the occluder intersection points are actually inside the
// boundaryPolygon so must check this.
double eyeToPDistSq = eye.distanceSquared(p);
if (eyeToPDistSq > maxEyeToBoundaryPolygonPointDistSq) {
continue;
} else if (eyeToPDistSq >= minEyeToBoundaryPolygonPointDistSq) {
if (boundaryPolygon.contains(p) == false) {
continue;
}
}
int xIndicator = getXIndicator(p, eye);
int yIndicator = getYIndicator(p, eye);
for (int k = 0; k < polygonAndDists.size(); k++) {
OccluderDistAndQuad polygonAndDist = polygonAndDists.get(k);
KPolygon polygon = polygonAndDist.getPolygon();
if (visiblePoint.getPolygon() == polygon) {
ArrayList<Vector2f> points = polygon.getPoints();
for (int m = 0; m < points.size(); m++) {
int nextM = (m + 1 >= points.size() ? 0 : m + 1);
if (visiblePoint.getPolygonPointNum() == m) {
continue;
}
if (Vector2fUtils.linesIntersect(p, eye, points.get(m), points.get(nextM))) {
continue OuterLoop;
}
}
} else if (visiblePoint.getPolygon2() == polygon) {
ArrayList<Vector2f> points = polygon.getPoints();
for (int m = 0; m < points.size(); m++) {
int nextM = (m + 1 >= points.size() ? 0 : m + 1);
if (visiblePoint.getPolygonPointNum2() == m) {
continue;
}
if (Vector2fUtils.linesIntersect(p, eye, points.get(m), points.get(nextM))) {
continue OuterLoop;
}
}
} else {
if (polygonAndDist.getDistEyeToCenterLessRadiusSqSigned() > eyeToPDistSq) {
break;
}
if (xIndicator * polygonAndDist.getXIndicator() == -1
|| yIndicator * polygonAndDist.getYIndicator() == -1) {
continue;
}
if (polygon.intersectionPossible(p, eye) && polygon.intersectsLine(p, eye)) {
continue OuterLoop;
}
}
}
VPOccluderOccluderIntersection occluderIntersectionVisiblePoint =
occluderIntersectionPoints.get(j);
visiblePoints.add(occluderIntersectionVisiblePoint);
}
occluderIntersectionPoints.clear();
// codeTimer.click("add visible boundaryPolygon points");
// Add all points on the boundaryPolygon if they're unobstructed.
OuterLoop:
for (int j = 0; j < boundaryPolygonPoints.size(); j++) {
Vector2f p = boundaryPolygonPoints.get(j);
int xIndicator = getXIndicator(p, eye);
int yIndicator = getYIndicator(p, eye);
for (int k = 0; k < polygonAndDists.size(); k++) {
OccluderDistAndQuad polygonAndDist = polygonAndDists.get(k);
KPolygon polygon = polygonAndDists.get(k).getPolygon();
if (xIndicator * polygonAndDist.getXIndicator() == -1
|| yIndicator * polygonAndDist.getYIndicator() == -1) {
continue;
}
if (polygon.intersectionPossible(p, eye) && polygon.intersectsLine(p, eye)) {
continue OuterLoop;
}
}
VPBoundary vp = new VPBoundary(p);
visiblePoints.add(vp);
}
// codeTimer.click("sort visiblePoints");
for (int i = 0; i < visiblePoints.size(); i++) {
visiblePoints.get(i).preSortCalcs(eye);
}
Collections.sort(visiblePoints);
// codeTimer.click("add shadow points");
// Make new points by casting a ray from the eye thru each occluder end point and finding the
// closest intersection.
for (int j = 0; j < visiblePoints.size(); j++) {
int jPlus = (j + 1 >= visiblePoints.size() ? 0 : j + 1);
if (visiblePoints.get(j).getType() == VisiblePoint.OCCLUDER) {
// see if the the points on the polygon on either side of this one are on the same side so a
// shadow can be cast
VPOccluder sp = (VPOccluder) visiblePoints.get(j);
Vector2f p = sp.getPoint();
KPolygon polygon = sp.getPolygon();
int pNum = sp.getPolygonPointNum();
int pNumPlus = (pNum + 1 >= polygon.getPoints().size() ? 0 : pNum + 1);
Vector2f pPlus = polygon.getPoints().get(pNumPlus);
int pNumMinus = (pNum - 1 < 0 ? polygon.getPoints().size() - 1 : pNum - 1);
Vector2f pMinus = polygon.getPoints().get(pNumMinus);
int pPlusRCCW = Vector2fUtils.relCCW(eye, p, pPlus.x, pPlus.y);
int pMinusRCCW = Vector2fUtils.relCCW(eye, p, pMinus.x, pMinus.y);
if (pPlusRCCW == pMinusRCCW) {
double pToEyeDist = p.distance(eye);
Vector2f endOfRayPoint =
Vector2fUtils.createPointToward(
eye,
p,
pToEyeDist
+ boundaryPolygon.getRadius()
* 2); // p.createPointFromAngle(angleRelativeToEye,
// getOriginalSightPolygon().getRadius()*2);
Vector2f closestIntersectionPoint = null;
double closestDist = Double.MAX_VALUE;
Occluder closestOccluder = null;
int closestObstPolygonEdgeIndex = -1;
boolean obstCloser = false;
int xIndicator = getXIndicator(p, eye);
int yIndicator = getYIndicator(p, eye);
// cast a ray from the shadow point and find the closest intersection with the occluders
for (int k = 0; k < polygonAndDists.size(); k++) {
OccluderDistAndQuad polygonAndDist = polygonAndDists.get(k);
KPolygon polygon2 = polygonAndDist.getPolygon();
if (pToEyeDist
> polygonAndDist.getDistEyeToCenterLessRadius() + polygon2.getRadius() * 2) {
// intersection not possible since the polygon is even closer than the ray start
// point.
continue;
}
if (closestDist < polygonAndDist.getDistEyeToCenterLessRadius()) {
// break since this polygon is further away than the existing closestIntersection.
break;
}
if (xIndicator * polygonAndDist.getXIndicator() == -1
|| yIndicator * polygonAndDist.getYIndicator() == -1) {
// intersection is not possible since the point and
// the occluders are in different quadrants, so skip to next occluder.
continue;
}
if (polygon2.intersectionPossible(p, endOfRayPoint) == false) {
// intersection is not possible, so skip to next occluder.
continue;
}
ArrayList<Vector2f> points = polygon2.getPoints();
for (int m = 0; m < points.size(); m++) {
int mPlus = (m + 1 >= points.size() ? 0 : m + 1);
if (polygon == polygon2 && (pNum == m || pNum == mPlus)) {
continue;
}
if (Vector2fUtils.linesIntersect(
p, endOfRayPoint, points.get(m), points.get(mPlus))) {
Vector2f intersection =
Vector2fUtils.getLineLineIntersection(
p, endOfRayPoint, points.get(m), points.get(mPlus));
if (intersection != null) {
double dist = eye.distance(intersection);
if (dist < closestDist) {
closestDist = dist;
closestIntersectionPoint = intersection;
closestOccluder = polygonAndDist.getOccluder();
closestObstPolygonEdgeIndex = m;
obstCloser = true;
}
}
}
}
}
int closestBoundaryPolygonEdgeIndex = -1;
// also see if the closest intersection is with the boundaryPolygon
if (closestIntersectionPoint == null || closestDist > minEyeToBoundaryPolygonPointDist) {
ArrayList<Vector2f> points = boundaryPolygon.getPoints();
for (int m = 0; m < points.size(); m++) {
if (xIndicator * boundaryPolygonXIndicators[m] == -1
|| yIndicator * boundaryPolygonYIndicators[m] == -1) {
// intersection is not possible since the boundaryPolygon points and
// the endOfRayPoint are in different quadrants, so skip to next occluder.
continue;
}
int mPlus = (m + 1 >= points.size() ? 0 : m + 1);
if (Vector2fUtils.linesIntersect(
p, endOfRayPoint, points.get(m), points.get(mPlus))) {
// atLeastOneIntersection = true;
Vector2f intersection =
Vector2fUtils.getLineLineIntersection(
p, endOfRayPoint, points.get(m), points.get(mPlus));
if (intersection != null) {
double dist = eye.distance(intersection);
if (dist < closestDist) {
closestDist = dist;
closestIntersectionPoint = intersection;
closestBoundaryPolygonEdgeIndex = m;
obstCloser = false;
// There should only be one intersection with the boundaryPolygon, so we can
// break.
break;
}
}
}
}
// for debugging:
// if (atLeastOneIntersection == false || closestIntersectionPoint != null &&
// closestDist > maxEyeToBoundaryPolygonPointDist){
// System.out.println(this.getClass().getSimpleName()+": atLeastOneIntersection ==
// "+atLeastOneIntersection+", closestIntersectionPoint != null, closestDist ==
// "+closestDist+", maxEyeToBoundaryPolygonPointDist ==
// "+maxEyeToBoundaryPolygonPointDist+", minEyeToBoundaryPolygonPointDist ==
// "+minEyeToBoundaryPolygonPointDist+", boundaryPolygon.contains(p) ==
// "+boundaryPolygon.contains(p)+", eye.distance(p) == "+eye.distance(p));
// }
}
if (closestIntersectionPoint != null) {
VisiblePoint newSightPoint = null;
if (obstCloser) {
newSightPoint =
new VPShadowOnOccluder(
closestIntersectionPoint, closestOccluder, closestObstPolygonEdgeIndex, sp);
// newSightPoint.quadrant = sp.quadrant;
// newSightPoint.xOnY = sp.xOnY;
} else {
newSightPoint =
new VPShadowOnBoundary(
closestIntersectionPoint, closestBoundaryPolygonEdgeIndex, sp);
// newSightPoint.quadrant = sp.quadrant;
// newSightPoint.xOnY = sp.xOnY;
}
if (pPlusRCCW == -1 && pMinusRCCW == -1) {
visiblePoints.add(jPlus, newSightPoint);
j++;
continue;
} else if (pPlusRCCW == 1 && pMinusRCCW == 1) {
visiblePoints.add(j, newSightPoint);
j++;
continue;
}
// if (pPlusRCCW == -1 && pMinusRCCW == -1){
// shadowPointsToBeAdded.add(newSightPoint);
// shadowPointsToBeAddedIndexes.add(jPlus);
// continue;
// }else if (pPlusRCCW == 1 && pMinusRCCW == 1){
// shadowPointsToBeAdded.add(newSightPoint);
// shadowPointsToBeAddedIndexes.add(j);
// continue;
// }
}
}
}
}
// int nextInsert = 0;
// int lastInsert = 0;
// for (int i = 0; i < shadowPointsToBeAddedIndexes.size(); i++){
// nextInsert = shadowPointsToBeAddedIndexes.get(i);
// if (nextInsert == 0 && lastInsert > nextInsert){
// // nextInsert == jPlus == 0 because j == sightPoints.size()-1,
// // so the point can be inserted on the end or the beginning so
// // add it on the end so that this simple loop logic works.
// nextInsert = sightPoints.size();
// }
// for (int j = lastInsert; j < nextInsert; j++){
// sightPoints2.add(sightPoints.get(j));
// }
// sightPoints2.add(shadowPointsToBeAdded.get(i));
// lastInsert = nextInsert;
// }
// for (int j = lastInsert; j < sightPoints.size(); j++){
// sightPoints2.add(sightPoints.get(j));
// }
// sightPoints.clear();
// //sightPoints.addAll(sightPoints2);
// //sightPoints2.clear();
// shadowPointsToBeAdded.clear();
// shadowPointsToBeAddedIndexes.clear();
// codeTimer.click("make polygon");
polygonAndDists.clear();
cache.visiblePoints = visiblePoints;
cache.visiblePolygon = createPolygonFromVisiblePoints(visiblePoints);
// codeTimer.lastClick();
return cache;
}