Tutorial: How to put together a MeshInstance + ShaderMaterial via script

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Tutorial: How to put together a MeshInstance + ShaderMaterial via script

novaleaf

This code is C#, but it's directly transferable to GDScript. Main "gotchas" are that you have to manually set shader default parameters, which you don't if you do this via the editor/inspector

		//put together a ShaderMaterial via code		
		var shader = GD.Load<Shader>("res://asset/cube/cube.shader");
		var diffuse = GD.Load<Texture>("res://asset/cube/cube-diffuse.png");
		var meshInstWithShadMat = new MeshInstance();
		meshInstWithShadMat.Mesh = mesh;
		var shadMat = new ShaderMaterial();
		shadMat.Shader = shader;
		//need to explicitly set default shader params yourself when setting up a ShaderMaterial through code
		shadMat.SetShaderParam("albedo", Colors.White);
		shadMat.SetShaderParam("uv1_scale", Vector3.One);
		shadMat.SetShaderParam("uv1_offset", Vector3.Zero);
		shadMat.SetShaderParam("uv2_scale", Vector3.One);
		shadMat.SetShaderParam("uv2_offset", Vector3.Zero);
		shadMat.SetShaderParam("texture_albedo", diffuse);
		meshInstWithShadMat.MaterialOverride = shadMat;
		AddChild(meshInstWithShadMat);

cybereality

Nice!