/**
* Performs one line of sight calculation between the reference position and a specified grid
* position.
*
* @param gridPosition the grid position.
* @throws InterruptedException if the operation is interrupted.
*/
protected void performIntersection(Position gridPosition) throws InterruptedException {
// Intersect the line between this grid point and the selected position.
Intersection[] intersections = this.terrain.intersect(this.referencePosition, gridPosition);
if (intersections == null || intersections.length == 0) {
// No intersection, so the line goes from the center to the grid point.
this.sightLines.add(new Position[] {this.referencePosition, gridPosition});
return;
}
// Only the first intersection is shown.
Vec4 iPoint = intersections[0].getIntersectionPoint();
Vec4 gPoint =
terrain.getSurfacePoint(
gridPosition.getLatitude(), gridPosition.getLongitude(), gridPosition.getAltitude());
// Check to see whether the intersection is beyond the grid point.
if (iPoint.distanceTo3(this.referencePoint) >= gPoint.distanceTo3(this.referencePoint)) {
// Intersection is beyond the grid point; the line goes from the center to the grid point.
this.addSightLine(this.referencePosition, gridPosition);
return;
}
// Compute the position corresponding to the intersection.
Position iPosition = this.terrain.getGlobe().computePositionFromPoint(iPoint);
// The sight line goes from the user-selected position to the intersection position.
this.addSightLine(this.referencePosition, new Position(iPosition, 0));
// Keep track of the intersection positions.
this.addIntersectionPosition(iPosition);
this.updateProgress();
}
protected void assembleHeightControlPoints() {
if (this.controlPoints.size() < 2) return;
// Add one control point for the height between the first and second vertices.
// TODO: ensure that this control point is visible
Position firstVertex = this.controlPoints.get(0).getPosition();
Position secondVertex = this.controlPoints.get(1).getPosition();
Globe globe = this.wwd.getModel().getGlobe();
// Get cartesian points for the vertices
Vec4 firstPoint = globe.computePointFromPosition(firstVertex);
Vec4 secondPoint = globe.computePointFromPosition(secondVertex);
// Find the midpoint of the line segment that connects the vertices
Vec4 halfwayPoint = firstPoint.add3(secondPoint).divide3(2.0);
Position halfwayPosition = globe.computePositionFromPoint(halfwayPoint);
this.controlPoints.add(
new ControlPointMarker(
CHANGE_HEIGHT_ACTION,
halfwayPosition,
halfwayPoint,
this.heightControlAttributes,
this.controlPoints.size()));
}
protected boolean areShapesIntersecting(Airspace a1, Airspace a2) {
if ((a1 instanceof SphereAirspace) && (a2 instanceof SphereAirspace)) {
SphereAirspace s1 = (SphereAirspace) a1;
SphereAirspace s2 = (SphereAirspace) a2;
LatLon location1 = s1.getLocation();
LatLon location2 = s2.getLocation();
double altitude1 = s1.getAltitudes()[0];
double altitude2 = s2.getAltitudes()[0];
boolean terrainConforming1 = s1.isTerrainConforming()[0];
boolean terrainConforming2 = s2.isTerrainConforming()[0];
// We have to compute the 3D coordinates of the sphere's center ourselves here.
Vec4 p1 =
terrainConforming1
? this.getSurfacePoint(location1, altitude1)
: this.getPoint(location1, altitude1);
Vec4 p2 =
terrainConforming2
? this.getSurfacePoint(location2, altitude2)
: this.getPoint(location2, altitude2);
double r1 = s1.getRadius();
double r2 = s2.getRadius();
double d = p1.distanceTo3(p2);
return d <= (r1 + r2);
}
return false;
}
protected void assembleVertexControlPoints(DrawContext dc) {
Terrain terrain = dc.getTerrain();
ExtrudedPolygon polygon = this.getPolygon();
Position refPos = polygon.getReferencePosition();
Vec4 refPoint = terrain.getSurfacePoint(refPos.getLatitude(), refPos.getLongitude(), 0);
int altitudeMode = polygon.getAltitudeMode();
double height = polygon.getHeight();
Vec4 vaa = null;
double vaaLength = 0; // used to compute independent length of each cap vertex
double vaLength = 0;
int i = 0;
for (LatLon location : polygon.getOuterBoundary()) {
Vec4 vert;
// Compute the top/cap point.
if (altitudeMode == WorldWind.CONSTANT || !(location instanceof Position)) {
if (vaa == null) {
// Compute the vector lengths of the top and bottom points at the reference position.
vaa = refPoint.multiply3(height / refPoint.getLength3());
vaaLength = vaa.getLength3();
vaLength = refPoint.getLength3();
}
// Compute the bottom point, which is on the terrain.
vert = terrain.getSurfacePoint(location.getLatitude(), location.getLongitude(), 0);
double delta = vaLength - vert.dot3(refPoint) / vaLength;
vert = vert.add3(vaa.multiply3(1d + delta / vaaLength));
} else if (altitudeMode == WorldWind.RELATIVE_TO_GROUND) {
vert =
terrain.getSurfacePoint(
location.getLatitude(),
location.getLongitude(),
((Position) location).getAltitude());
} else // WorldWind.ABSOLUTE
{
vert =
terrain
.getGlobe()
.computePointFromPosition(
location.getLatitude(),
location.getLongitude(),
((Position) location).getAltitude() * terrain.getVerticalExaggeration());
}
Position vertexPosition = this.wwd.getModel().getGlobe().computePositionFromPoint(vert);
this.controlPoints.add(
new ControlPointMarker(
MOVE_VERTEX_ACTION, vertexPosition, vert, this.vertexControlAttributes, i));
i++;
}
}
protected void onHorizontalTranslateRel(
Angle forwardChange, Angle sideChange, ViewInputAttributes.ActionAttributes actionAttribs) {
View view = this.getView();
if (view == null) // include this test to ensure any derived implementation performs it
{
return;
}
if (forwardChange.equals(Angle.ZERO) && sideChange.equals(Angle.ZERO)) {
return;
}
if (view instanceof BasicFlyView) {
Vec4 forward = view.getForwardVector();
Vec4 up = view.getUpVector();
Vec4 side = forward.transformBy3(Matrix.fromAxisAngle(Angle.fromDegrees(90), up));
forward = forward.multiply3(forwardChange.getDegrees());
side = side.multiply3(sideChange.getDegrees());
Vec4 eyePoint = view.getEyePoint();
eyePoint = eyePoint.add3(forward.add3(side));
Position newPosition = view.getGlobe().computePositionFromPoint(eyePoint);
this.setEyePosition(this.uiAnimControl, view, newPosition, actionAttribs);
view.firePropertyChange(AVKey.VIEW, null, view);
}
}
/**
* Add a vertex to the polygon's outer boundary.
*
* @param mousePoint the point at which the mouse was clicked. The new vertex will be placed as
* near as possible to this point, at the elevation of the polygon.
*/
protected void addVertex(Point mousePoint) {
// Try to find the edge that is closest to a ray passing through the screen point. We're trying
// to determine
// the user's intent as to which edge a new two control points should be added to.
Line ray = this.wwd.getView().computeRayFromScreenPoint(mousePoint.getX(), mousePoint.getY());
Vec4 pickPoint = this.intersectPolygonAltitudeAt(ray);
double nearestDistance = Double.MAX_VALUE;
int newVertexIndex = 0;
// Loop through the control points and determine which edge is closest to the pick point
for (int i = 0; i < this.controlPoints.size(); i++) {
ControlPointMarker thisMarker = (ControlPointMarker) this.controlPoints.get(i);
ControlPointMarker nextMarker =
(ControlPointMarker) this.controlPoints.get((i + 1) % this.controlPoints.size());
Vec4 pointOnEdge =
AirspaceEditorUtil.nearestPointOnSegment(thisMarker.point, nextMarker.point, pickPoint);
if (!AirspaceEditorUtil.isPointBehindLineOrigin(ray, pointOnEdge)) {
double d = pointOnEdge.distanceTo3(pickPoint);
if (d < nearestDistance) {
newVertexIndex = i + 1;
nearestDistance = d;
}
}
}
Position newPosition = this.wwd.getModel().getGlobe().computePositionFromPoint(pickPoint);
// Copy the outer boundary list
ArrayList<Position> positionList = new ArrayList<Position>(this.controlPoints.size());
for (LatLon position : this.getPolygon().getOuterBoundary()) {
positionList.add((Position) position);
}
// Add the new vertex
positionList.add(newVertexIndex, newPosition);
this.getPolygon().setOuterBoundary(positionList);
}
public void lookAt(Position lookAtPos, long timeToMove) {
BasicFlyView view = (BasicFlyView) this.getView();
Vec4 lookDirection;
double distanceToSurface;
Vec4 currentLookAtPt = view.getCenterPoint();
Position newPosition;
if (currentLookAtPt == null) {
view.getGlobe().computePointFromPosition(lookAtPos);
double elevAtLookAtPos =
view.getGlobe().getElevation(lookAtPos.getLatitude(), lookAtPos.getLongitude());
newPosition = new Position(lookAtPos, elevAtLookAtPos + 10000);
} else {
Vec4 currentEyePt = view.getEyePoint();
distanceToSurface = currentEyePt.distanceTo3(currentLookAtPt);
lookDirection = currentLookAtPt.subtract3(currentEyePt).normalize3();
Vec4 newLookAtPt = view.getGlobe().computePointFromPosition(lookAtPos);
Vec4 flyToPoint = newLookAtPt.add3(lookDirection.multiply3(-distanceToSurface));
newPosition = view.getGlobe().computePositionFromPoint(flyToPoint);
}
ViewUtil.ViewState viewCoords = view.getViewState(newPosition, lookAtPos);
FlyToFlyViewAnimator panAnimator =
FlyToFlyViewAnimator.createFlyToFlyViewAnimator(
view,
view.getEyePosition(),
newPosition,
view.getHeading(),
viewCoords.getHeading(),
view.getPitch(),
viewCoords.getPitch(),
view.getEyePosition().getElevation(),
viewCoords.getPosition().getElevation(),
timeToMove,
WorldWind.ABSOLUTE);
this.gotoAnimControl.put(VIEW_ANIM_PAN, panAnimator);
this.getView().firePropertyChange(AVKey.VIEW, null, this.getView());
view.firePropertyChange(AVKey.VIEW, null, view);
}
protected void onMoveTo(
Position focalPosition,
ViewInputAttributes.DeviceAttributes deviceAttributes,
ViewInputAttributes.ActionAttributes actionAttribs) {
BasicFlyView view = (BasicFlyView) this.getView();
if (view == null) // include this test to ensure any derived implementation performs it
{
return;
}
// We're treating a speed parameter as smoothing here. A greater speed results in greater
// smoothing and
// slower response. Therefore the min speed used at lower altitudes ought to be *greater* than
// the max
// speed used at higher altitudes.
double smoothing = this.getScaleValueElevation(deviceAttributes, actionAttribs);
if (!actionAttribs.isEnableSmoothing()) smoothing = 0.0;
Vec4 currentLookAtPt = view.getCenterPoint();
if (currentLookAtPt == null) {
currentLookAtPt = view.getGlobe().computePointFromPosition(focalPosition);
}
Vec4 currentEyePt = view.getEyePoint();
double distanceToSurface = currentEyePt.distanceTo3(currentLookAtPt);
Vec4 lookDirection = currentEyePt.subtract3(currentLookAtPt).normalize3();
Vec4 newLookAtPt = view.getGlobe().computePointFromPosition(focalPosition);
Vec4 flyToPoint = newLookAtPt.add3(lookDirection.multiply3(distanceToSurface));
Position newPosition = view.getGlobe().computePositionFromPoint(flyToPoint);
ViewUtil.ViewState viewCoords = view.getViewState(newPosition, focalPosition);
this.stopAnimators();
this.gotoAnimControl.put(
VIEW_ANIM_HEADING,
new RotateToAngleAnimator(
view.getHeading(),
viewCoords.getHeading(),
smoothing,
ViewPropertyAccessor.createHeadingAccessor(view)));
this.gotoAnimControl.put(
VIEW_ANIM_PITCH,
new RotateToAngleAnimator(
view.getPitch(),
viewCoords.getPitch(),
smoothing,
ViewPropertyAccessor.createPitchAccessor(view)));
double elevation =
((FlyViewLimits) view.getViewPropertyLimits())
.limitEyeElevation(newPosition, view.getGlobe());
if (elevation != newPosition.getElevation()) {
newPosition = new Position(newPosition, elevation);
}
this.gotoAnimControl.put(
VIEW_ANIM_POSITION,
new MoveToPositionAnimator(
view.getEyePosition(),
newPosition,
smoothing,
ViewPropertyAccessor.createEyePositionAccessor(view)));
view.firePropertyChange(AVKey.VIEW, null, view);
}
