wehub-resource-sync
85 lines
2.7 KiB
C#
85 lines
2.7 KiB
C#
using T3.Core.DataTypes.ShaderGraph;
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namespace Lib.field.generate.sdf;
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[Guid("637d00e4-ab63-4fe3-8e63-1e206c728841")]
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internal sealed class CustomSDF : Instance<CustomSDF>
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, IGraphNodeOp
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{
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[Output(Guid = "1aaaf637-a2f1-4706-909e-fa4fb102619d")]
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public readonly Slot<ShaderGraphNode> Result = new();
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public CustomSDF()
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{
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ShaderNode = new ShaderGraphNode(this);
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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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ShaderNode.Update(context);
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var code = DistanceFunction.GetValue(context);
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var defines = AdditionalDefines.GetValue(context);
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var templateChanged = code != _code || defines != _defines;
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if (!templateChanged)
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return;
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_code = code;
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_defines = defines;
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ShaderNode.FlagCodeChanged();
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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.Definitions.AppendLine("""
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#ifndef mod
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#define mod(x, y) ((x) - (y) * floor((x) / (y)))
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#endif
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""");
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c.Definitions.Append(_defines);
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c.Definitions.AppendLine();
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c.Definitions.AppendLine($"float dCustom{ShaderNode}(float3 p, float3 Offset, float A, float B, float C)\n{{");
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c.Definitions.Append(_code);
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c.Definitions.AppendLine();
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c.Definitions.AppendLine("}");
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}
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public void GetPreShaderCode(CodeAssembleContext c, int inputIndex)
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{
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var n = ShaderNode;
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c.AppendCall($"f{c}.w = dCustom{ShaderNode}(p{c}.xyz, {n}Offset, {n}A, {n}B, {n}C);");
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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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private string _code = string.Empty;
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private string _defines = string.Empty;
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[GraphParam]
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[Input(Guid = "64f1812f-7ebd-4231-8a6a-0bbc302bfaff")]
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public readonly InputSlot<Vector3> Offset = new();
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[GraphParam]
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[Input(Guid = "3c366d34-c398-410e-972b-d8cc2baffddb")]
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public readonly InputSlot<float> A = new();
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[GraphParam]
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[Input(Guid = "874ae9c8-5835-4d0c-9bef-253ac75d19b2")]
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public readonly InputSlot<float> B = new();
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[GraphParam]
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[Input(Guid = "56e5d5ec-ec59-4ea0-85c1-1eca3dcb5790")]
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public readonly InputSlot<float> C = new();
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[Input(Guid = "BDE89B93-224C-4A3F-85AB-D85B0401C02A")]
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public readonly InputSlot<string> DistanceFunction = new InputSlot<string>();
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[Input(Guid = "48A0699D-1207-4E18-AB9B-4DA7F77CC7AA")]
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public readonly InputSlot<string> AdditionalDefines = new InputSlot<string>();
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} |