Painting Setting

.Net Add-on Programming
1

I want to trigger the painting setting through the code in the following code, but it fails to execute properly and shows an error. Where did I make a mistake? Thank you.

        private void PrpareForPainting_click(object sender, RoutedEventArgs e)
        {

            ICommandRegistry cmd = IoC.Get<ICommandRegistry>();
            IActionItem extractCmd = cmd.FindItem("PrpareForPainting");
            extractCmd.Execute();
        }

Error : System.NullReferenceException:“Object reference not set to an instance of an object.”

2

That command takes a bool parameter, and only opens or closes the UI for it. I think there is no API to prepare components for painting programmatically.

3

So there is no way to set the Prepare Selected Components method?
Thank you

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4

What the “Prepare for painting” does is collect all triangle meshes (ITriangleSet) from all node’s geometry (ISimNode.Geometry) of the selected component and then call

ITriangleSet.SubdivideMesh(MaxEdgeLength, int.MaxValue);
ITriangleSet.ResetTextureCoordinateValues();

Then it sets (or creates) a boolean property in the component called “PaintPrepared” to true.

So, even though you can not use the command directly, you can do the same using the .NET API.

5

I’m not sure how to use it. Can you give me some examples?
Thanks

6

Something like this (did not test it):

private void PrpareForPainting_click(object sender, RoutedEventArgs e)
{
    var c = IoC.Get<ISelectionManager>().GetSelected<ISimComponent>();
    double maxEdgeLength = 50;
    SubvideMesh(c.RootNode);

	var componentPreparedProp = c.Properties.FirstOrDefault(p => p.Name == PaintProperties.PAINT_PREPARED);
	if (componentPreparedProp == null)
	{
		componentPreparedProp = c.CreateProperty(typeof(bool), PropertyConstraintType.NotSpecified);
		componentPreparedProp.Name = PaintProperties.PAINT_PREPARED;
		componentPreparedProp.IsVisible = false;
	}
	componentPreparedProp.Value = true;

	IoC.Get<IPaintColorMapsEditorViewModel>().AddMaterialToComponent(c, true, true);

}

private void SubvideMesh(ISimNode node, double maxEdgeLength)
{
    var sets = node.Geometry.GeometrySets.OfType<ITriangleSet>();
    foreach (var triangleset in sets)
    {
        NotificationBar();
        triangleset.SubdivideMesh(maxEdgeLength, int.MaxValue);
        triangleset.ResetTextureCoordinateValues();
    }

    var children = node.Children;
    foreach (var n in children)
    {
        SubvideMesh(n, maxEdgeLength);
    }
}
7

Thank you, I have tested it and it works