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@@ -0,0 +1,79 @@
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+using Drawie.Backend.Core.Numerics;
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+using Drawie.Backend.Core.Vector;
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+using Drawie.Numerics;
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+using PixiEditor.ChangeableDocument.Changeables.Graph.Interfaces;
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+using PixiEditor.ChangeableDocument.Changeables.Graph.Nodes.Shapes.Data;
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+using PixiEditor.ChangeableDocument.Rendering;
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+
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+namespace PixiEditor.ChangeableDocument.Changeables.Graph.Nodes.Shapes;
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+
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+[NodeInfo("EvaluatePath")]
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+public class EvaluatePathNode : Node
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+{
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+ public InputProperty<ShapeVectorData> Shape { get; }
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+ public InputProperty<double> Offset { get; }
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+ public InputProperty<bool> NormalizeOffset { get; }
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+
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+ public OutputProperty<VecD> Position { get; }
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+ public OutputProperty<VecD> Tangent { get; }
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+ public OutputProperty<Matrix3X3> Matrix { get; }
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+
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+ protected override bool ExecuteOnlyOnCacheChange => true;
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+ protected override CacheTriggerFlags CacheTrigger => CacheTriggerFlags.All;
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+
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+ public EvaluatePathNode()
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+ {
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+ Shape = CreateInput<ShapeVectorData>("Shape", "SHAPE", null);
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+ Offset = CreateInput<double>("NormalizedOffset", "OFFSET", 0.0);
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+ NormalizeOffset = CreateInput<bool>("NormalizeOffset", "NORMALIZE_OFFSET", true);
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+
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+ Position = CreateOutput<VecD>("Position", "POSITION", VecD.Zero);
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+ Tangent = CreateOutput<VecD>("Tangent", "TANGENT", VecD.Zero);
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+ Matrix = CreateOutput<Matrix3X3>("Matrix", "MATRIX", Matrix3X3.Identity);
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+ }
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+
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+ protected override void OnExecute(RenderContext context)
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+ {
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+ if(Shape.Value == null)
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+ {
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+ Position.Value = VecD.Zero;
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+ Tangent.Value = VecD.Zero;
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+ Matrix.Value = Matrix3X3.Identity;
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+ return;
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+ }
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+
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+ double offset = Offset.Value;
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+
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+ var path = Shape.Value.ToPath(true);
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+
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+ if (path == null)
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+ {
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+ Position.Value = VecD.Zero;
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+ Tangent.Value = VecD.Zero;
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+ Matrix.Value = Matrix3X3.Identity;
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+ return;
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+ }
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+
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+ float absoluteOffset = (float)offset;
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+
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+ if (NormalizeOffset.Value)
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+ {
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+ offset = Math.Clamp(offset, 0.0, 1.0);
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+ double length = path.Length;
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+ absoluteOffset = (float)(length * offset);
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+ }
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+
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+ Vec4D data = path.GetPositionAndTangentAtDistance(absoluteOffset, false);
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+ Matrix3X3 matrix = path.GetMatrixAtDistance(absoluteOffset, false, PathMeasureMatrixMode.GetPositionAndTangent);
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+
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+ Position.Value = new VecD(data.X, data.Y);
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+ Tangent.Value = new VecD(data.Z, data.W);
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+
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+ Matrix.Value = matrix;
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+ }
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+
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+ public override Node CreateCopy()
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+ {
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+ return new EvaluatePathNode();
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+ }
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+}
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Krzysztof Krysiński
