private void adjustDateLineCrossingPoints() {
ArrayList<LatLon> corners = new ArrayList<LatLon>(Arrays.asList(sw, se, nw, ne));
if (!LatLon.locationsCrossDateLine(corners)) return;
double lonSign = 0;
for (LatLon corner : corners) {
if (Math.abs(corner.getLongitude().degrees) != 180)
lonSign = Math.signum(corner.getLongitude().degrees);
}
if (lonSign == 0) return;
if (Math.abs(sw.getLongitude().degrees) == 180
&& Math.signum(sw.getLongitude().degrees) != lonSign)
sw = new Position(sw.getLatitude(), sw.getLongitude().multiply(-1), sw.getElevation());
if (Math.abs(se.getLongitude().degrees) == 180
&& Math.signum(se.getLongitude().degrees) != lonSign)
se = new Position(se.getLatitude(), se.getLongitude().multiply(-1), se.getElevation());
if (Math.abs(nw.getLongitude().degrees) == 180
&& Math.signum(nw.getLongitude().degrees) != lonSign)
nw = new Position(nw.getLatitude(), nw.getLongitude().multiply(-1), nw.getElevation());
if (Math.abs(ne.getLongitude().degrees) == 180
&& Math.signum(ne.getLongitude().degrees) != lonSign)
ne = new Position(ne.getLatitude(), ne.getLongitude().multiply(-1), ne.getElevation());
}
/**
* {@inheritDoc}
*
* @param positions Control points. This graphic uses only two control point, which determine the
* midpoints of two opposite sides of the quad. See Fire Support Area (2.X.4.3.2.1.2) on pg.
* 652 of MIL-STD-2525C for an example of how these points are interpreted.
*/
public void setPositions(Iterable<? extends Position> positions) {
if (positions == null) {
String message = Logging.getMessage("nullValue.PositionsListIsNull");
Logging.logger().severe(message);
throw new IllegalArgumentException(message);
}
Iterator<? extends Position> iterator = positions.iterator();
try {
Position pos1 = iterator.next();
Position pos2 = iterator.next();
LatLon center = LatLon.interpolateGreatCircle(0.5, pos1, pos2);
this.quad.setCenter(center);
Angle heading = LatLon.greatCircleAzimuth(pos2, pos1);
this.quad.setHeading(heading.subtract(Angle.POS90));
this.positions = positions;
this.shapeInvalid = true; // Need to recompute quad size
} catch (NoSuchElementException e) {
String message = Logging.getMessage("generic.InsufficientPositions");
Logging.logger().severe(message);
throw new IllegalArgumentException(message);
}
}
private Info[] buildSurfaceShapes() {
LatLon position = new LatLon(Angle.fromDegrees(38), Angle.fromDegrees(-105));
ArrayList<LatLon> surfaceLinePositions = new ArrayList<LatLon>();
// surfaceLinePositions.add(LatLon.fromDegrees(37.8484, -119.9754));
// surfaceLinePositions.add(LatLon.fromDegrees(38.3540, -119.1526));
// surfaceLinePositions.add(new LatLon(Angle.fromDegrees(0),
// Angle.fromDegrees(-150)));
// surfaceLinePositions.add(new LatLon(Angle.fromDegrees(60),
// Angle.fromDegrees(0)));
surfaceLinePositions.add(position);
surfaceLinePositions.add(LatLon.fromDegrees(39, -104));
surfaceLinePositions.add(LatLon.fromDegrees(39, -105));
surfaceLinePositions.add(position);
return new Info[] {
new Info("Circle", new SurfaceCircle(position, 100e3)),
new Info("Ellipse", new SurfaceEllipse(position, 100e3, 90e3, Angle.ZERO)),
new Info("Square", new SurfaceSquare(position, 100e3)),
new Info("Quad", new SurfaceQuad(position, 100e3, 60e3, Angle.ZERO)),
new Info("Sector", new SurfaceSector(Sector.fromDegrees(38, 40, -105, -103))),
new Info("Polygon", new SurfacePolygon(surfaceLinePositions)),
};
}
protected void movePolygon(Point previousMousePoint, Point mousePoint) {
// Intersect a ray through each mouse point, with a geoid passing through the reference
// elevation.
// If either ray fails to intersect the geoid, then ignore this event. Use the difference
// between the two
// intersected positions to move the control point's location.
View view = this.wwd.getView();
Globe globe = this.wwd.getModel().getGlobe();
Position refPos = this.polygon.getReferencePosition();
if (refPos == null) return;
Line ray = view.computeRayFromScreenPoint(mousePoint.getX(), mousePoint.getY());
Line previousRay =
view.computeRayFromScreenPoint(previousMousePoint.getX(), previousMousePoint.getY());
Vec4 vec = AirspaceEditorUtil.intersectGlobeAt(this.wwd, refPos.getElevation(), ray);
Vec4 previousVec =
AirspaceEditorUtil.intersectGlobeAt(this.wwd, refPos.getElevation(), previousRay);
if (vec == null || previousVec == null) {
return;
}
Position pos = globe.computePositionFromPoint(vec);
Position previousPos = globe.computePositionFromPoint(previousVec);
LatLon change = pos.subtract(previousPos);
this.polygon.move(new Position(change.getLatitude(), change.getLongitude(), 0.0));
}
protected List<Position> computePathPositions(
Position startPosition, Position endPosition, Angle delta) {
Angle dist = LatLon.greatCircleDistance(startPosition, endPosition);
dist = dist.multiply(0.6);
Angle azimuth = LatLon.greatCircleAzimuth(startPosition, endPosition);
LatLon locA = LatLon.greatCircleEndPosition(startPosition, azimuth.add(delta), dist);
dist = dist.multiply(0.9);
LatLon locB = LatLon.greatCircleEndPosition(startPosition, azimuth.subtract(delta), dist);
return Arrays.asList(startPosition, new Position(locA, 0), new Position(locB, 0), endPosition);
}
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 computeQuadSize(DrawContext dc) {
if (this.positions == null) return;
Iterator<? extends Position> iterator = this.positions.iterator();
Position pos1 = iterator.next();
Position pos2 = iterator.next();
Angle angularDistance = LatLon.greatCircleDistance(pos1, pos2);
double length = angularDistance.radians * dc.getGlobe().getRadius();
this.quad.setWidth(length);
}
/**
* Create the list of positions that describe the arrow.
*
* @param dc Current draw context.
*/
protected void createShapes(DrawContext dc) {
this.paths = new Path[2];
int i = 0;
Angle azimuth1 = LatLon.greatCircleAzimuth(this.position1, this.position2);
Angle azimuth2 = LatLon.greatCircleAzimuth(this.position1, this.position3);
Angle delta = azimuth2.subtract(azimuth1);
int sign = delta.degrees > 0 ? 1 : -1;
delta = Angle.fromDegrees(sign * 5.0);
// Create a path for the line part of the arrow
List<Position> positions = this.computePathPositions(this.position1, this.position2, delta);
this.paths[i++] = this.createPath(positions);
// Create a polygon to draw the arrow head.
double arrowLength = this.getArrowLength();
Angle arrowAngle = this.getArrowAngle();
positions =
this.computeArrowheadPositions(
dc, positions.get(2), positions.get(3), arrowLength, arrowAngle);
this.arrowHead1 = this.createPolygon(positions);
this.arrowHead1.setLocations(positions);
delta = delta.multiply(-1.0);
positions = this.computePathPositions(this.position1, this.position3, delta);
this.paths[i] = this.createPath(positions);
positions =
this.computeArrowheadPositions(
dc, positions.get(2), positions.get(3), arrowLength, arrowAngle);
this.arrowHead2 = this.createPolygon(positions);
this.arrowHead2.setLocations(positions);
}
/**
* Compute the view range footprint on the globe.
*
* @param dc the current <code>DrawContext</code>
* @param steps the number of steps.
* @return an array list of <code>LatLon</code> forming a closed shape.
*/
protected ArrayList<LatLon> computeViewFootPrint(DrawContext dc, int steps) {
ArrayList<LatLon> positions = new ArrayList<LatLon>();
Position eyePos = dc.getView().getEyePosition();
Angle distance =
Angle.fromRadians(
Math.asin(
dc.getView().getFarClipDistance()
/ (dc.getGlobe().getRadius() + eyePos.getElevation())));
if (distance.degrees > 10) {
double headStep = 360d / steps;
Angle heading = Angle.ZERO;
for (int i = 0; i <= steps; i++) {
LatLon p = LatLon.greatCircleEndPosition(eyePos, heading, distance);
positions.add(p);
heading = heading.addDegrees(headStep);
}
return positions;
} else return null;
}
/** {@inheritDoc} */
@Override
protected void determineLabelPositions(DrawContext dc) {
Position center = this.getReferencePosition();
if (center == null) return;
// Position the labels along a line radiating out from the center of the circle. The angle (60
// degrees) is
// chosen to match the graphic template defined by MIL-STD-2525C, pg. 613.
double globeRadius = dc.getGlobe().getRadius();
Angle labelAngle = this.getLabelAngle();
int i = 0;
for (SurfaceCircle ring : this.rings) {
double radius = ring.getRadius();
LatLon ll = LatLon.greatCircleEndPosition(center, labelAngle.radians, radius / globeRadius);
this.labels.get(i).setPosition(new Position(ll, 0));
i += 1;
}
}
/**
* Create the circles used to draw this graphic.
*
* @param dc Current draw context.
*/
protected void createShapes(DrawContext dc) {
if (this.positions == null) return;
this.rings = new ArrayList<SurfaceCircle>();
Iterator<? extends Position> iterator = this.positions.iterator();
Position center = iterator.next();
double globeRadius = dc.getGlobe().getRadius();
while (iterator.hasNext()) {
SurfaceCircle ring = this.createCircle();
ring.setCenter(center);
Position pos = iterator.next();
Angle radius = LatLon.greatCircleDistance(center, pos);
double radiusMeters = radius.radians * globeRadius;
ring.setRadius(radiusMeters);
this.rings.add(ring);
}
}
protected void drawIcon(DrawContext dc) {
if (this.getIconFilePath() == null) return;
GL gl = dc.getGL();
OGLStackHandler ogsh = new OGLStackHandler();
try {
// Initialize texture if necessary
Texture iconTexture = dc.getTextureCache().getTexture(this.getIconFilePath());
if (iconTexture == null) {
this.initializeTexture(dc);
iconTexture = dc.getTextureCache().getTexture(this.getIconFilePath());
if (iconTexture == null) {
String msg = Logging.getMessage("generic.ImageReadFailed");
Logging.logger().finer(msg);
return;
}
}
gl.glDisable(GL.GL_DEPTH_TEST);
double width = this.getScaledIconWidth();
double height = this.getScaledIconHeight();
// Load a parallel projection with xy dimensions (viewportWidth, viewportHeight)
// into the GL projection matrix.
java.awt.Rectangle viewport = dc.getView().getViewport();
ogsh.pushProjectionIdentity(gl);
double maxwh = width > height ? width : height;
gl.glOrtho(0d, viewport.width, 0d, viewport.height, -0.6 * maxwh, 0.6 * maxwh);
// Translate and scale
ogsh.pushModelviewIdentity(gl);
double scale = this.computeScale(viewport);
Vec4 locationSW = this.computeLocation(viewport, scale);
gl.glTranslated(locationSW.x(), locationSW.y(), locationSW.z());
// Scale to 0..1 space
gl.glScaled(scale, scale, 1);
gl.glScaled(width, height, 1d);
if (!dc.isPickingMode()) {
gl.glEnable(GL.GL_BLEND);
gl.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA);
// Draw background color behind the map
gl.glColor4ub(
(byte) this.backColor.getRed(),
(byte) this.backColor.getGreen(),
(byte) this.backColor.getBlue(),
(byte) (this.backColor.getAlpha() * this.getOpacity()));
dc.drawUnitQuad();
// Draw world map icon
gl.glColor4d(1d, 1d, 1d, this.getOpacity());
gl.glEnable(GL.GL_TEXTURE_2D);
iconTexture.bind();
TextureCoords texCoords = iconTexture.getImageTexCoords();
dc.drawUnitQuad(texCoords);
gl.glBindTexture(GL.GL_TEXTURE_2D, 0);
gl.glDisable(GL.GL_TEXTURE_2D);
// Draw crosshair for current location
gl.glLoadIdentity();
gl.glTranslated(locationSW.x(), locationSW.y(), locationSW.z());
// Scale to width x height space
gl.glScaled(scale, scale, 1);
// Set color
float[] colorRGB = this.color.getRGBColorComponents(null);
gl.glColor4d(colorRGB[0], colorRGB[1], colorRGB[2], this.getOpacity());
// Draw crosshair
Position groundPos = this.computeGroundPosition(dc, dc.getView());
if (groundPos != null) {
int x = (int) (width * (groundPos.getLongitude().degrees + 180) / 360);
int y = (int) (height * (groundPos.getLatitude().degrees + 90) / 180);
int w = 10; // cross branch length
// Draw
gl.glBegin(GL.GL_LINE_STRIP);
gl.glVertex3d(x - w, y, 0);
gl.glVertex3d(x + w + 1, y, 0);
gl.glEnd();
gl.glBegin(GL.GL_LINE_STRIP);
gl.glVertex3d(x, y - w, 0);
gl.glVertex3d(x, y + w + 1, 0);
gl.glEnd();
}
// Draw view footprint in map icon space
if (this.showFootprint) {
this.footPrintPositions = this.computeViewFootPrint(dc, 32);
if (this.footPrintPositions != null) {
gl.glBegin(GL.GL_LINE_STRIP);
LatLon p1 = this.footPrintPositions.get(0);
for (LatLon p2 : this.footPrintPositions) {
int x = (int) (width * (p2.getLongitude().degrees + 180) / 360);
int y = (int) (height * (p2.getLatitude().degrees + 90) / 180);
// Draw
if (LatLon.locationsCrossDateline(p1, p2)) {
int y1 = (int) (height * (p1.getLatitude().degrees + 90) / 180);
gl.glVertex3d(x < width / 2 ? width : 0, (y1 + y) / 2, 0);
gl.glEnd();
gl.glBegin(GL.GL_LINE_STRIP);
gl.glVertex3d(x < width / 2 ? 0 : width, (y1 + y) / 2, 0);
}
gl.glVertex3d(x, y, 0);
p1 = p2;
}
gl.glEnd();
}
}
// Draw 1px border around and inside the map
gl.glBegin(GL.GL_LINE_STRIP);
gl.glVertex3d(0, 0, 0);
gl.glVertex3d(width, 0, 0);
gl.glVertex3d(width, height - 1, 0);
gl.glVertex3d(0, height - 1, 0);
gl.glVertex3d(0, 0, 0);
gl.glEnd();
} else {
// Picking
this.pickSupport.clearPickList();
this.pickSupport.beginPicking(dc);
// Where in the world are we picking ?
Position pickPosition =
computePickPosition(
dc, locationSW, new Dimension((int) (width * scale), (int) (height * scale)));
Color color = dc.getUniquePickColor();
int colorCode = color.getRGB();
this.pickSupport.addPickableObject(colorCode, this, pickPosition, false);
gl.glColor3ub((byte) color.getRed(), (byte) color.getGreen(), (byte) color.getBlue());
dc.drawUnitQuad();
this.pickSupport.endPicking(dc);
this.pickSupport.resolvePick(dc, dc.getPickPoint(), this);
}
} finally {
dc.restoreDefaultDepthTesting();
dc.restoreDefaultCurrentColor();
if (dc.isPickingMode()) dc.restoreDefaultBlending();
ogsh.pop(gl);
}
}
