Building DisplayMaterial questions

Scripting
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1

Question : How is DisplayMaterial constructed with rhino’s document default materials

image
image1206×691 75.9 KB

Pictur_ information : On the left is the material drawn in the pipeline, and on the right is the rhino default material



        Me  = rh.Display.DisplayMaterial(sd.Color.LightGray)

        Me.Transparency = 0.5

DisplayMaterial class

2

@nathanletwory Hi Sir, can you help me? The material drawing in the pipeline always troubles me, thank you :nerd_face:

3

Hi @tom33,

You are passing a single argument to the constructor, basically just saying make a display material with the diffuse/albedo color of gray.

then with Me.Transparency = 0.5 you are setting additional settings of said material.

so to achieve what you see on the right you need to set the additional properties such as Me.Diffuse, etc.

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4 
Display.DisplayMaterial(

            sd.Color.Gray,

            sd.Color.White,

            sd.Color.Yellow,

            sd.Color.Gray,

            0,0.3

        )

At present, the other parameters also seem unable to achieve the default material settings of Rhino.

5

@tom33 I think you are actually looking for the DisplayPipeline settings and specifically Display Pipeline Attributes:

https://developer.rhino3d.com/api/rhinocommon/rhino.display.displaypipelineattributes:

https://developer.rhino3d.com/api/rhinocommon/rhino.display.displaypipeline

This is where you can set it to be rendering edges, different control point styles, etc.

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6

@tom33 unfortunately I don’t know much about our display pipeline. Perhaps @jeff has better insight regarding display materials.

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7

image
image1168×706 113 KB

Thank you for your reply. I think it might be a problem with my grid? Resulting in the rendering not meeting the requirements?

The key part of the pipeline👇

        self.eddm  = rh.Display.DisplayMaterial(
        )

        self.eddm.IsTwoSided = False

        self.eddm.BackDiffuse = sd.Color.Red

        self.eddm.BackTransparency =1


    def DrawForeground(self, e):
        """
        Draw_e
        """
        try:

            if not self.Drawing_Meshs is None:
                for me in self.Drawing_Meshs:
                        e.Display.DrawMeshShaded(
                            me,
                            self.eddm
                        )

            pass
        except Exception as ex:
            print("me",ex)
8

Thank you for your reply.

9

Hi @tom33,

your problem is likely that you’re drawing your mesh in the DrawForeground channel which draws without depth testing and writing. Try to change this to PostDrawObjects first without transparency. If you find that the mesh still does not draw as expected, add it to the doc and see how Rhino draws it without your conduit.

Note that you need to draw your mesh edges using DrawMeshWires

_

c.

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