Re-rendering delay ?

[bomberman]

Hello,

I am trying to draw my own colored cylinder at the Earth's Surface in WorldWind.
So I copied the JOGL drawing code from the Open GL calls in render() Method in Cylinder.java to my own cylinder class.

When I draw a cylinder with the Cylinder class and then move the globe(with the mouse), the cylinder will immediately be re-rendered.

The problem is: when I use my own cylinder class to draw a cylinder and then move the glob the cylinder is ONLY re-rendered some time AFTER releasing the mouse button. That means, the cylinder stays in its old position a little while,
which looks ugly and is weird...

My question: do I have to register my own cylinder class (it implements the interface "Renderable" as the existing Cylinder class) at some sort of SelectListener, PositionLister oder RenderingListener ???
maybe there is somewhere a statement like " if xxx instanceof Cylinder"
or a check for the package "gov.nasa.worldwind.geom" ?

When I look into Cylinder.java there is nothing been done in this direction.
Maybe it is done "internally" in one of the xxxRenderer classes ? (IconRenderer, TrackRenderer etc ?) Which one is the "main" rendering class or the "RenderableRender" class ???


Now following: Code in my render method: (how do you create "Code :" rectangles in the forum posts ?

Hello,

I am trying to draw my own colored cylinder at the Earth's Surface in WorldWind.
So I copied the JOGL drawing code from the Open GL calls in render() Method in Cylinder.java to my own cylinder class.

When I draw a cylinder with the Cylinder class and then move the globe(with the mouse), the cylinder will immediately be re-rendered.

The problem is: when I use my own cylinder class to draw a cylinder and then move the glob the cylinder is ONLY re-rendered some time AFTER releasing the mouse button. That means, the cylinder stays in its old position a little while,
which looks ugly and is weird...

My question: do I have to register my own cylinder class (it implements the interface "Renderable" as the existing Cylinder class) at some sort of SelectListener, PositionLister oder RenderingListener ???
maybe there is somewhere a statement like " if xxx instanceof Cylinder"
or a check for the package "gov.nasa.worldwind.geom" when registering
to those listeners ?

When I look into Cylinder.java there is nothing been done in this direction.
Maybe it is done "internally" in one of the xxxRenderer classes ? (IconRenderer, TrackRenderer etc ?) Which one is the "main" rendering class or the "RenderableRender" class ???


Now following: Code in my render method

public void render(DrawContext dc)
{
GL gl = dc.getGL();
// gl.glPushAttrib(GL.GL_ENABLE_BIT | GL.GL_TRANSFORM_BIT);

//line above commented out because: when using this line there is NO
//Re-Rendering of my own cylinder any more !!!
// Strangely in Cylinder.java this is used...


//cylinder central line
gl.glBegin(GL.GL_LINES);
gl.glColor3d(1.0, 0.0, 0.0);
gl.glVertex3d(bottomCenter.x(), bottomCenter.y(), bottomCenter.z());
gl.glVertex3d(topCenter.x(), topCenter.y(), topCenter.z());
gl.glEnd();

//depth test and modelview matrix ?
gl.glEnable(GL.GL_DEPTH_TEST);
gl.glMatrixMode(GL.GL_MODELVIEW);

//save old matrix
gl.glPushMatrix();

//center point bottom circle of cylinder
gl.glTranslated(bottomCenter.x(), bottomCenter.y(), bottomCenter.z());


//rotate around Y Axis according to longitude
dc.getGL().glRotated(p.getLongitude().ge tDegrees(), 0, 1, 0);

//rotate around X Axis in correct direction according to latitude
dc.getGL().glRotated(Math.abs(p.getLatit ude().getDegrees()),
Math.signum(p.getLatitude().getDegrees() ) * -1, 0, 0);

//draw cylinder "on" prepared(?) Quadric
GLUquadric quad = dc.getGLU().gluNewQuadric();
double height = topCenter.distanceTo(bottomCenter);
dc.getGLU().gluQuadricDrawStyle(quad, GLU.GLU_LINE);
dc.getGLU().gluCylinder(quad, radius, radius, height, 30, 30);
dc.getGLU().gluDeleteQuadric(quad);

//load old matrix and attributes
gl.glPopAttrib();
gl.glPopMatrix();

}
all coordinate calculations done outside to rendering methods, similar to
Cylinder.java

Please take a look at Cylinder.java (in world wind java sdk sources) too !

bomberman

[patmurris]

How do you get your cylinder to render ? - is it added to a RenderableLayer that is in the Model LayerList ?

Something like this ?

// A renderable layer with a myCylinder renderable
public RenderableLayer myLayer() {
    RenderableLayer layer = new RenderableLayer();
    layer.addRenderable(new myCylinder(...));
    return layer
}

[bomberman]

yes it is added to a renderable layer like that.
by the way, I now simply copied the code from the Cylinder.java
render method to another renderable-derived class... and that seems to work
Did I mention I read and typed the code manually before ? Maybe I missed
something or something was in the wrong order.

bomberman