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 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)); }