Placement / alignment of UserFacingIcons

[KurtZachary]

I just set used .setHeading(null); and it is producing the desired results. Now I need to figure out how to make it so the image is centered on the lat/lon.

[KurtZachary]

Thanks for the offset code, it worked perfectly!

Is there a way to turn off the functionality where the image enlarges on mouse over?

I have no idea if my uses will love it or hate it so I'm just curious if it is easy to turn on/off.

[tag]

I just tried the Placemarks example, setting the heading of Placemark B to 45 and the heading reference to RELATIVE_TO_SCREEN and it worked as expected. Also works with a heading of 90.

[tag]

Set the PointPlacemark's highlight attributes to be the same as its normal attributes.

[KurtZachary]

That is very easy, thanks!

[incubus]

Hi, I know this is a bit of a late reply but I wanted to do the exact same thing and achieved it by using a custom icon renderer and using it in my IconLayer. Doing it this way allows you to still use the UserFacingIcon should you wish to keep it. See code below:

import com.sun.opengl.util.texture.TextureCoords;
import gov.nasa.worldwind.geom.Vec4;
import gov.nasa.worldwind.layers.IconLayer;
import gov.nasa.worldwind.render.DrawContext;
import gov.nasa.worldwind.render.IconRenderer;
import gov.nasa.worldwind.render.WWIcon;
import gov.nasa.worldwind.util.Logging;
import java.awt.Dimension;
import java.awt.Rectangle;
import javax.media.opengl.GL;

public class ContactLayer extends IconLayer{
    
    public ContactLayer(){
        this.iconRenderer = new CenteredIconRenderer();
    }
    
    // Code copied from gov.nasa.worldwind.render.IconRenderer with modifications
    // to the centre icon spot.
    private class CenteredIconRenderer extends IconRenderer{

        @Override
        protected Vec4 drawIcon(DrawContext dc, OrderedIcon uIcon) {
            Vec4 iconPoint = uIcon.getPoint();
            if (iconPoint == null)
            {
                String msg = Logging.getMessage("nullValue.PointIsNull");
                Logging.logger().severe(msg);

                // Record feedback data for this WWIcon if feedback is enabled.
                if (uIcon.getIcon() != null)
                    this.recordFeedback(dc, uIcon.getIcon(), null, null);

                return null;
            }

            WWIcon icon = uIcon.getIcon();
            if (dc.getView().getFrustumInModelCoordinates().getNear().distanceTo(iconPoint) < 0)
            {
                // Record feedback data for this WWIcon if feedback is enabled.
                this.recordFeedback(dc, icon, iconPoint, null);

                return null;
            }

            final Vec4 screenPoint = dc.getView().project(iconPoint);
            if (screenPoint == null)
            {
                // Record feedback data for this WWIcon if feedback is enabled.
                this.recordFeedback(dc, icon, iconPoint, null);

                return null;
            }

            double pedestalScale;
            double pedestalSpacing;
            if (this.pedestal != null)
            {
                pedestalScale = this.pedestal.getScale();
                pedestalSpacing = pedestal.getSpacingPixels();
            }
            else
            {
                pedestalScale = 0d;
                pedestalSpacing = 0d;
            }

            javax.media.opengl.GL gl = dc.getGL();

            this.setDepthFunc(dc, uIcon, screenPoint);

            gl.glMatrixMode(GL.GL_MODELVIEW);
            gl.glLoadIdentity();

            Dimension size = icon.getSize();
            double width = size != null ? size.getWidth() : icon.getImageTexture().getWidth(dc);
            double height = size != null ? size.getHeight() : icon.getImageTexture().getHeight(dc);
            //gl.glTranslated(screenPoint.x - width / 2, screenPoint.y + (pedestalScale * height) + pedestalSpacing, 0d);
            gl.glTranslated(screenPoint.x - width / 2, screenPoint.y - height / 2 + (pedestalScale * height) + pedestalSpacing, 0d);

            if (icon.isHighlighted())
            {
                double heightDelta = this.pedestal != null ? 0 : height / 2; // expand only above the pedestal
                gl.glTranslated(width / 2, heightDelta, 0);
                gl.glScaled(icon.getHighlightScale(), icon.getHighlightScale(), icon.getHighlightScale());
                gl.glTranslated(-width / 2, -heightDelta, 0);
            }

            //Rectangle rect = new Rectangle((int) (screenPoint.x - width / 2), (int) (screenPoint.y), (int) width, (int) (height + (pedestalScale * height) + pedestalSpacing));
            Rectangle rect = new Rectangle((int) (screenPoint.x - width / 2), (int) (screenPoint.y - height / 2), (int) width, (int) (height + (pedestalScale * height) + pedestalSpacing));
            
            if (dc.isPickingMode())
            {
                //If in picking mode and pick clipping is enabled, check to see if the icon is within the pick volume.
                if (this.isPickFrustumClippingEnabled() && !dc.getPickFrustums().intersectsAny(rect))
                {
                    // Record feedback data for this WWIcon if feedback is enabled.
                    this.recordFeedback(dc, icon, iconPoint, rect);

                    return screenPoint;
                }
                else
                {
                    java.awt.Color color = dc.getUniquePickColor();
                    int colorCode = color.getRGB();
                    this.pickSupport.addPickableObject(colorCode, icon, uIcon.getPosition(), false);
                    gl.glColor3ub((byte) color.getRed(), (byte) color.getGreen(), (byte) color.getBlue());
                }
            }

            if (icon.getBackgroundTexture() != null)
                this.applyBackground(dc, icon, screenPoint, width, height, pedestalSpacing, pedestalScale);

            if (icon.getImageTexture().bind(dc))
            {
                TextureCoords texCoords = icon.getImageTexture().getTexCoords();
                gl.glScaled(width, height, 1d);
                dc.drawUnitQuad(texCoords);
            }

            if (this.pedestal != null && this.pedestal.getImageTexture() != null)
            {
                gl.glLoadIdentity();
                gl.glTranslated(screenPoint.x - (pedestalScale * (width / 2)), screenPoint.y, 0d);
                gl.glScaled(width * pedestalScale, height * pedestalScale, 1d);

                if (this.pedestal.getImageTexture().bind(dc))
                {
                    TextureCoords texCoords = this.pedestal.getImageTexture().getTexCoords();
                    dc.drawUnitQuad(texCoords);
                }
            }

            // Record feedback data for this WWIcon if feedback is enabled.
            this.recordFeedback(dc, icon, iconPoint, rect);

            return screenPoint;
        }
    }
}

John.