wehub-resource-sync
100 lines
3.3 KiB
C#
100 lines
3.3 KiB
C#
using T3.Core.DataTypes.ShaderGraph;
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using T3.Core.Utils;
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namespace Lib.field.space;
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[Guid("409a150a-83c7-4efd-80a0-67bf0345a398")]
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internal sealed class RepeatFieldLimit : Instance<RepeatFieldLimit>
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,IGraphNodeOp
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{
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[Output(Guid = "0aa09119-e59c-437c-beaf-fd4b2b4ee3c6")]
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public readonly Slot<ShaderGraphNode> Result = new();
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public RepeatFieldLimit()
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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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var axis = Axis.GetEnumValue<AxisTypes>(context);
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var templateChanged = axis != _axis;
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if (!templateChanged)
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return;
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_axis = axis;
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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.Globals["Common"] = ShaderGraphIncludes.Common;
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c.Globals["pModLimited2"] = """
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// https://mercury.sexy/hg_sdf/
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// Repeat only a few times: from indices <start> to <stop> (similar to above, but more flexible)
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float pModLimited2(inout float p, float size, float start, float stop)
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{
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float halfsize = size*0.5;
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float c = floor((p + halfsize)/size);
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p = mod(p+halfsize, size) - halfsize;
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if (c > stop) { //yes, this might not be the best thing numerically.
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p += size*(c - stop);
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c = stop;
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}
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if (c <start) {
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p += size*(c - start);
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c = start;
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}
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return c;
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}
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""";
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}
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void IGraphNodeOp.GetPreShaderCode(CodeAssembleContext c, int inputIndex)
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{
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var n = ShaderNode;
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c.AppendCall($"pModLimited2(p{c}.{_axisCodes0[(int)_axis]}, {n}Size, {n}Start, {n}Stop);");
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}
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private readonly string[] _axisCodes0 =
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[
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"x",
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"y",
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"z",
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];
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private AxisTypes _axis;
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private enum AxisTypes
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{
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X,
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Y,
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Z,
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}
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[Input(Guid = "073ac201-6be4-495c-9c6d-cfa26c9b1035")]
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public readonly InputSlot<ShaderGraphNode> InputField = new();
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[Input(Guid = "06ea2b77-5c65-40b9-b9e8-6788786bd7db", MappedType = typeof(AxisTypes))]
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public readonly InputSlot<int> Axis = new();
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[GraphParam]
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[Input(Guid = "3ec4e97c-f653-4b80-8a8e-3292d28dff13")]
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public readonly InputSlot<float> Size = new();
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[GraphParam]
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[Input(Guid = "B73FE274-CF9A-4950-A10C-88C9F22B4397")]
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public readonly InputSlot<float> Start = new();
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[GraphParam]
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[Input(Guid = "C72615BE-8123-4D3B-BC69-0F912B0FDC39")]
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public readonly InputSlot<float> Stop = new();
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} |