Exemplo n.º 1
0
        public Position computeCenterPositionToResolveCollision(BasicOrbitView orbitView, double nearDistance,
                                                                DrawContext dc)
        {
            if (orbitView == null)
            {
                String message = Logging.getMessage("nullValue.OrbitViewIsNull");
                Logging.logger().severe(message);
                throw new ArgumentException(message);
            }
            if (nearDistance < 0)
            {
                String message = Logging.getMessage("generic.ArgumentOutOfRange", nearDistance);
                Logging.logger().severe(message);
                throw new ArgumentException(message);
            }
            if (dc == null)
            {
                String message = Logging.getMessage("nullValue.DrawContextIsNull");
                Logging.logger().severe(message);
                throw new ArgumentException(message);
            }
            Globe globe = dc.getGlobe();

            if (globe == null)
            {
                String message = Logging.getMessage("nullValue.DrawingContextGlobeIsNull");
                Logging.logger().severe(message);
                throw new ArgumentException(message);
            }

            Position newCenter = null;

            for (int i = 0; i < this.numIterations; i++)
            {
                Matrix modelviewInv = getModelviewInverse(globe,
                                                          newCenter != null ? newCenter : orbitView.getCenterPosition(),
                                                          orbitView.getHeading(), orbitView.getPitch(), orbitView.getRoll(), orbitView.getZoom());
                if (modelviewInv != null)
                {
                    double heightAboveSurface = computeViewHeightAboveSurface(dc, modelviewInv,
                                                                              orbitView.getFieldOfView(), orbitView.getViewport(), nearDistance);
                    double adjustedHeight = heightAboveSurface - this.collisionThreshold;
                    if (adjustedHeight < 0)
                    {
                        newCenter = new Position(
                            newCenter != null ? newCenter : orbitView.getCenterPosition(),
                            (newCenter != null ? newCenter.getElevation() : orbitView.getCenterPosition().getElevation())
                            - adjustedHeight);
                    }
                }
            }

            return(newCenter);
        }
Exemplo n.º 2
0
        public Angle computePitchToResolveCollision(BasicOrbitView orbitView, double nearDistance, DrawContext dc)
        {
            if (orbitView == null)
            {
                String message = Logging.getMessage("nullValue.OrbitViewIsNull");
                Logging.logger().severe(message);
                throw new ArgumentException(message);
            }
            if (nearDistance < 0)
            {
                String message = Logging.getMessage("generic.ArgumentOutOfRange", nearDistance);
                Logging.logger().severe(message);
                throw new ArgumentException(message);
            }
            if (dc == null)
            {
                String message = Logging.getMessage("nullValue.DrawContextIsNull");
                Logging.logger().severe(message);
                throw new ArgumentException(message);
            }
            Globe globe = dc.getGlobe();

            if (globe == null)
            {
                String message = Logging.getMessage("nullValue.DrawingContextGlobeIsNull");
                Logging.logger().severe(message);
                throw new ArgumentException(message);
            }

            Angle newPitch = null;

            for (int i = 0; i < this.numIterations; i++)
            {
                Matrix modelviewInv = getModelviewInverse(globe,
                                                          orbitView.getCenterPosition(), orbitView.getHeading(),
                                                          newPitch != null ? newPitch : orbitView.getPitch(), orbitView.getRoll(),
                                                          orbitView.getZoom());
                if (modelviewInv != null)
                {
                    double heightAboveSurface = computeViewHeightAboveSurface(dc, modelviewInv,
                                                                              orbitView.getFieldOfView(), orbitView.getViewport(), nearDistance);
                    double adjustedHeight = heightAboveSurface - this.collisionThreshold;
                    if (adjustedHeight < 0)
                    {
                        Vec4 eyePoint    = getEyePoint(modelviewInv);
                        Vec4 centerPoint = globe.computePointFromPosition(orbitView.getCenterPosition());
                        if (eyePoint != null && centerPoint != null)
                        {
                            Position eyePos = globe.computePositionFromPoint(eyePoint);
                            // Compute the eye point required to resolve the collision.
                            Vec4 newEyePoint = globe.computePointFromPosition(eyePos.getLatitude(), eyePos.getLongitude(),
                                                                              eyePos.getElevation() - adjustedHeight);
                            // Compute the pitch that corresponds with the elevation of the eye point
                            // (but not necessarily the latitude and longitude).
                            Vec4   normalAtCenter    = globe.computeSurfaceNormalAtPoint(centerPoint);
                            Vec4   newEye_sub_center = newEyePoint.subtract3(centerPoint).normalize3();
                            double dot = normalAtCenter.dot3(newEye_sub_center);
                            if (dot >= -1 || dot <= 1)
                            {
                                double angle = Math.Acos(dot);
                                newPitch = Angle.fromRadians(angle);
                            }
                        }
                    }
                }
            }

            return(newPitch);
        }