Examples of gov.nasa.worldwind.geom.Vec4

    protected void determineLabelLocation(DrawContext dc)
    {
        // Reuse the current label location if its inside the view frustum and the label is completely visible when
        // placed there. Otherwise we find a new location that maximizes the label's visible area and is closest to the
        // current location.
        Vec4 lastPoint = this.getLabelPoint(dc);
        if (lastPoint != null && dc.getView().getFrustumInModelCoordinates().contains(lastPoint))
        {
            // Project the current location's model point into screen coordinates, and place the label at the
            // projected point. We do this to measure the label's visible area when placed at that point.
            Vec4 screenPoint = dc.getView().project(lastPoint);
            this.setLabelLocation(dc, screenPoint);


            // If the label is completely visible, just reuse its current location.
            if (this.isLabelCompletelyVisible(dc))
                return;
        }


        this.labelLocationIndex = -1;


        if (this.getLocations() == null)
            return;


        double maxArea = 0;
        double minDistance = Double.MAX_VALUE;
        int locationIndex = -1;


        for (LatLon ll : this.getLocations())
        {
            ++locationIndex;


            if (ll == null)
                continue;


            // Compute the specified location's point in model coordinates. Ignore locations who's model coordinate
            // point cannot be computed for any reason, or are outside the view frustum.
            Vec4 point = this.computePoint(dc, ll);
            if (point == null || !dc.getView().getFrustumInModelCoordinates().contains(point))
                continue;


            // Project the specified location's model point into screen coordinates, and place the label at the
            // projected point. We do this to measure the label's visible area when placed at that point.
            Vec4 screenPoint = dc.getView().project(point);
            this.setLabelLocation(dc, screenPoint);


            // Find the location that maximizes the label's visible area.
            double area = this.getLabelVisibleArea(dc);
            if (maxArea < area)

    {
        if (this.getAnnotation() == null)
            return;


        // Get the label's model point from the location iterable.
        Vec4 point = this.getLabelPoint(dc);
        if (point == null)
            return;


        // Project the label's model point into screen coordinates, place the annotation at the projected point then
        // draw the annotation.
        Vec4 screenPoint = dc.getView().project(point);
        this.setLabelLocation(dc, screenPoint);
        this.getAnnotation().render(dc);
    }

Examples of gov.nasa.worldwind.geom.Vec4

Related Classes of gov.nasa.worldwind.geom.Vec4