The wires that I’m drawing can only be seen if grasshopper has another node that is drawing something to the viewport. If I drop a sphere component on the canvas, my wires are displayed fine. If I delete the sphere component, my wires disappear too. Anyone know a fix?
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Make sure you override the ClippingBox property to return the bounding box of your preview geometry.
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Make sure the IsPreviewCapable property is true.
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