wehub-resource-sync
56 lines
1.9 KiB
C#
56 lines
1.9 KiB
C#
using T3.Core.DataTypes.ShaderGraph;
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namespace Lib.field.space;
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[Guid("1a933eb2-a89b-4694-ae04-60d86779cf28")]
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internal sealed class ReflectField : Instance<ReflectField>
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,IGraphNodeOp
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{
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[Output(Guid = "47166966-b53a-4b85-ac62-a6f956b7de23")]
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public readonly Slot<ShaderGraphNode> Result = new();
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public ReflectField()
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{
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ShaderNode = new ShaderGraphNode(this, null, InputField);
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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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}
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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["pReflect"] = """
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// https://mercury.sexy/hg_sdf/
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// Reflect space at a plane
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void pReflect(inout float3 p, float3 planeNormal, float offset) {
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float t = dot(p, planeNormal)+offset;
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if (t < 0) {
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p = p - (2*t)*planeNormal;
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}
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//return sgn(t);
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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($"pReflect(p{c}.xyz, normalize({ShaderNode}PlaneNormal), {ShaderNode}Offset);");
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}
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[Input(Guid = "c617549d-b67d-454c-91f5-bc1d6e9a66b7")]
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public readonly InputSlot<ShaderGraphNode> InputField = new();
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[GraphParam]
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[Input(Guid = "AFD3834B-9EF0-4D7A-B0A3-A93CB4193D40")]
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public readonly InputSlot<Vector3> PlaneNormal = new();
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[GraphParam]
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[Input(Guid = "D184A675-A5AB-42F9-B3F9-D275B0C7BEE8")]
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public readonly InputSlot<float> Offset = new();
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} |