Examples of gov.nasa.worldwind.globes.Globe.computePointFromPosition()

gov.nasa.worldwind.globes.Globe.computePointFromPosition()

        //          /
        //       C/
        //        | |
        //       Length


        Vec4 pB = globe.computePointFromPosition(tip);


        double baseLength = LatLon.greatCircleDistance(arcData.midpoint, tip).radians * globe.getRadius();
        double arrowLength = baseLength * this.getArrowLength();


        // Find the point at the base of the arrowhead

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        GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
        View view = dc.getView();
        Globe globe = dc.getGlobe();


        Vec4 point = globe.computePointFromPosition(controlPointInfo.position);
        double minSize = this.getMinObjectSize();
        double maxSize = this.computeMaxSizeForPixels(globe, segmentPlane);
        double sizeScale = this.computeSizeForPixels(view, point, 1.0, minSize, maxSize);


        // Apply the control point offset in the local coordinate system at the control point's position. Treat offset

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            }


            if (point == null)
            {
                double e = globe.getElevation(latlon.getLatitude(), latlon.getLongitude());
                point = globe.computePointFromPosition(
                    latlon.getLatitude(), latlon.getLongitude(), (e + elevation) * sc.getVerticalExaggeration());
            }


            return point;
        }

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        protected Vec4 getPoint(LatLon latlon, double elevation)
        {
            SceneController sc = this.getApp().getWwd().getSceneController();
            Globe globe = this.getApp().getWwd().getModel().getGlobe();
            double e = globe.getElevation(latlon.getLatitude(), latlon.getLongitude());
            return globe.computePointFromPosition(
                latlon.getLatitude(), latlon.getLongitude(), (e + elevation) * sc.getVerticalExaggeration());
        }


        public void createNewEntry(AirspaceFactory factory)
        {

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        Vec4 surfacePoint = this.wwd.getSceneController().getTerrain().getSurfacePoint(
            pos.getLatitude(), pos.getLongitude());
        if (surfacePoint == null)
        {
            Globe globe = this.wwd.getModel().getGlobe();
            surfacePoint = globe.computePointFromPosition(pos.getLatitude(), pos.getLongitude(),
                globe.getElevation(pos.getLatitude(), pos.getLongitude()));
        }


        return this.wwd.getView().project(surfacePoint);
    }

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        //   Mid |______\
        //       |      /
        //      /
        //   B /


        Vec4 pA = globe.computePointFromPosition(this.position2);
        Vec4 pB = globe.computePointFromPosition(this.position3);


        Position baseMidpoint = new Position(LatLon.interpolate(0.5, this.position2, this.position3), 0);
        Vec4 pMid = globe.computePointFromPosition(baseMidpoint);

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        //       |      /
        //      /
        //   B /


        Vec4 pA = globe.computePointFromPosition(this.position2);
        Vec4 pB = globe.computePointFromPosition(this.position3);


        Position baseMidpoint = new Position(LatLon.interpolate(0.5, this.position2, this.position3), 0);
        Vec4 pMid = globe.computePointFromPosition(baseMidpoint);


        // Compute a vector perpendicular to the segment AB and the normal vector

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        Vec4 pA = globe.computePointFromPosition(this.position2);
        Vec4 pB = globe.computePointFromPosition(this.position3);


        Position baseMidpoint = new Position(LatLon.interpolate(0.5, this.position2, this.position3), 0);
        Vec4 pMid = globe.computePointFromPosition(baseMidpoint);


        // Compute a vector perpendicular to the segment AB and the normal vector
        Vec4 vAB = pB.subtract3(pA);
        Vec4 normal = globe.computeSurfaceNormalAtPoint(pMid);
        Vec4 perpendicular = vAB.cross3(normal).normalize3();

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        arcData.radius = chordLength / (2 * arcAngle.sinHalfAngle());
        double dist = arcData.radius * arcAngle.cosHalfAngle();


        // Determine which side of the line AB the arrow point falls on. We want the arc face away from the arrow, so
        // set the direction of the perpendicular component according to the sign of the scalar triple product.
        Vec4 vOrientation = globe.computePointFromPosition(this.position1).subtract3(pMid);
        double tripleProduct = perpendicular.dot3(vOrientation);
        double sign = (tripleProduct > 0) ? -1 : 1;


        arcData.direction = perpendicular.multiply3(sign);

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