wehub-resource-sync
75 lines
2.8 KiB
C#
75 lines
2.8 KiB
C#
using T3.Core.DataTypes.ShaderGraph;
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namespace Lib.field.generate.sdf;
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[Guid("f393bb49-bea5-42f7-a437-c6896bdfd7d8")]
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internal sealed class BoxFrameSDF : Instance<BoxFrameSDF>
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,ITransformable
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,IGraphNodeOp
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{
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[Output(Guid = "10bd32e8-f7a1-4efa-9659-83313c2bf5a6")]
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public readonly Slot<ShaderGraphNode> Result = new();
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IInputSlot ITransformable.TranslationInput => Center;
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IInputSlot ITransformable.RotationInput => null;
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IInputSlot ITransformable.ScaleInput => Size;
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public Action<Instance, EvaluationContext> TransformCallback { get; set; }
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public BoxFrameSDF()
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{
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ShaderNode = new ShaderGraphNode(this);
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ShaderNode.AdditionalParameters = [
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new ShaderGraphNode.Parameter("float3", "CombinedScale", Vector3.One),
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];
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Result.Value = ShaderNode;
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Result.UpdateAction += Update;
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}
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private void Update(EvaluationContext context)
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{
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var combinedScale = Size.GetValue(context) * UniformScale.GetValue(context) /2;
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ShaderNode.AdditionalParameters[0].Value = combinedScale;
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TransformCallback?.Invoke(this, context);
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ShaderNode.Update(context);
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}
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public ShaderGraphNode ShaderNode { get; }
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void IGraphNodeOp.AddDefinitions(CodeAssembleContext c)
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{
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c.Globals["fBoxFrame"] = """
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float fBoxFrame(float3 p, float3 center, float3 b, float e) {
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p = abs(p-center )-b;
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float3 q = abs(p+e)-e;
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return min(min(
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length(max(float3(p.x,q.y,q.z),0.0))+min(max(p.x,max(q.y,q.z)),0.0),
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length(max(float3(q.x,p.y,q.z),0.0))+min(max(q.x,max(p.y,q.z)),0.0)),
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length(max(float3(q.x,q.y,p.z),0.0))+min(max(q.x,max(q.y,p.z)),0.0));
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}
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""";
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}
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public void GetPreShaderCode(CodeAssembleContext c, int inputIndex)
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{
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c.AppendCall($"f{c}.w = fBoxFrame(p{c}.xyz, {ShaderNode}Center, {ShaderNode}CombinedScale, {ShaderNode}Thickness);");
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c.AppendCall($"f{c}.xyz = p.w < 0.5 ? p{c}.xyz : 1;"); // save local space
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}
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[GraphParam]
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[Input(Guid = "c811ef83-e183-4b14-a1e6-3ea2fd840596")]
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public readonly InputSlot<Vector3> Center = new();
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[Input(Guid = "993a74e6-87fc-4193-9dc1-8cd9447a1c49")]
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public readonly InputSlot<Vector3> Size = new();
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[Input(Guid = "a53ab420-7bcf-4d98-8440-abcf00d7db19")]
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public readonly InputSlot<float> UniformScale = new();
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[GraphParam]
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[Input(Guid = "26389c32-410e-4240-9cf7-9ed0908b9cf8")]
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public readonly InputSlot<float> Thickness = new();
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} |