83 lines
2.5 KiB
C#
83 lines
2.5 KiB
C#
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namespace VdeSharp;
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/// <summary>
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/// Managed wrapper for VDE SDF (Signed Distance Function) modeling.
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/// Provides an expression-tree based CSG modeling approach.
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/// </summary>
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public class SdfEngine : IDisposable
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{
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private readonly nint _ctx;
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internal nint _handle;
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private bool _disposed;
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internal SdfEngine(nint ctx, nint handle)
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{
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_ctx = ctx;
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_handle = handle;
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}
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/// <summary>Create a sphere SDF node.</summary>
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public static SdfEngine Sphere(nint ctx, double radius)
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{
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nint hdl = NativeMethods.vde_sdf_sphere(ctx, radius);
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return new SdfEngine(ctx, hdl);
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}
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/// <summary>Create a box SDF node with half-extents (hx, hy, hz).</summary>
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public static SdfEngine Box(nint ctx, double hx, double hy, double hz)
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{
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nint hdl = NativeMethods.vde_sdf_box(ctx, hx, hy, hz);
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return new SdfEngine(ctx, hdl);
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}
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/// <summary>Create a cylinder SDF node.</summary>
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public static SdfEngine Cylinder(nint ctx, double radius, double height)
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{
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nint hdl = NativeMethods.vde_sdf_cylinder(ctx, radius, height);
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return new SdfEngine(ctx, hdl);
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}
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/// <summary>CSG union: this ∪ other</summary>
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public SdfEngine Union(SdfEngine other)
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{
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nint hdl = NativeMethods.vde_sdf_union(_ctx, _handle, other._handle);
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return new SdfEngine(_ctx, hdl);
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}
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/// <summary>CSG intersection: this ∩ other</summary>
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public SdfEngine Intersection(SdfEngine other)
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{
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nint hdl = NativeMethods.vde_sdf_intersection(_ctx, _handle, other._handle);
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return new SdfEngine(_ctx, hdl);
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}
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/// <summary>CSG difference: this \ other</summary>
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public SdfEngine Difference(SdfEngine other)
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{
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nint hdl = NativeMethods.vde_sdf_difference(_ctx, _handle, other._handle);
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return new SdfEngine(_ctx, hdl);
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}
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/// <summary>
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/// Convert the SDF tree to a triangle mesh using Marching Cubes.
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/// </summary>
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/// <param name="resolution">Grid resolution per axis (e.g., 64 for 64³ voxels)</param>
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public MeshData ToMesh(int resolution = 64)
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{
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nint mh = NativeMethods.vde_sdf_to_mesh(_ctx, _handle, resolution);
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var mesh = new MeshData(mh, ownsHandle: true);
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mesh.ExtractFromNative();
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return mesh;
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}
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public void Dispose()
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{
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if (!_disposed && _handle != nint.Zero)
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{
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NativeMethods.vde_sdf_free(_handle);
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_handle = nint.Zero;
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_disposed = true;
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}
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}
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}
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