Signed distance fields

SDF primitives and operations for rendering, collision, and modeling. Implementation: Runtime/SDF/.

Primitives

using static Unity.Mathematics.mathx;

float3 p = ...;
float d = p.sdSphere(1f);
float box = p.sdBox(float3(1), float3(0.5f));
float torus = p.sdTorus(0.5f, 0.2f);

Many shapes are available: capsule, cylinder, cone, hex prism, octahedron, etc.

Combining fields

Use smooth min/max from Interpolation to union, subtract, or blend SDFs:

float scene = t.smin(d1, d2);

See SDF.PrimitiveCombination.cs and SDF.DistanceOperations.cs for domain-specific helpers.

2D

2D variants live in SDF2.cs (udTriangle, udQuad, …).

API

SDF methods on mathx