SDF
sdf contains a number of helper functions for working with signed distance fields.
I highly recommend checking out Inigo Quilez’s excelent resource on the sdf primitives.
2d SDF
3d SDF
module sdf
sphere(
samplePosition: float3,sphereCenter: float3,radius: float
) -> float
box(
samplePosition: float3,boxCenter: float3,boxSize: float3
) -> float
roundBox(
samplePosition: float3,boxCenter: float3,boxSize: float3,cornerRadius: float
) -> float
boxFrame(
samplePosition: float3,boxCenter: float3,boxSize: float3,frameThickness: float
) -> float
torus(
samplePosition: float3,torusCenter: float3,torusSize: float2
) -> float
cappedTorus(
samplePosition: float3,torusCenter: float3,torusSize: float2,ra: float,rb: float
) -> float
link(
samplePosition: float3,linkCenter: float3,linkLength: float,r1: float,r2: float
) -> float
infinteCylinder(
samplePosition: float3,cylinderCenter: float3,cylinderSize: float3
) -> float
cone(
samplePosition: float3,coneCenter: float3,c: float2,coneHeight: float
) -> float
plane(
samplePosition: float3,planeCenter: float3,planeNormal: float3,planeHeight: float
) -> float
hexPrism(
samplePosition: float3,hexCenter: float3,hexSize: float2
) -> float
triPrism(
samplePosition: float3,triCenter: float3,triSize: float2
) -> float
capsuleLine(
samplePosition: float3,lineStart: float3,lineEnd: float3,capsuleRadius: float
) -> float
capsule(
samplePosition: float3,capsuleCenter: float3,height: float,radius: float
) -> float
cylinder(
samplePosition: float3,cylinderCenter: float3,height: float,radius: float
) -> float
cylinderLine(
samplePosition: float3,lineStart: float3,lineEnd: float3,radius: float
) -> float
roundedCylinder(
samplePosition: float3,cylinderCenter: float,cylinderRadius: float,cornerRadius: float,height: float
) -> float
cappedCone(
samplePosition: float3,coneCenter: float3,height: float,r1: float,r2: float
) -> float
solidAngle(
samplePosition: float3,solidCenter: float3,size: float2,radius: float
) -> float
cutSphere(
samplePosition: float3,sphereCenter: float3,radius: float,height: float
) -> float
cutHollowSphere(
samplePosition: float3,sphereCenter: float3,radius: float,height: float,thickness: float
) -> float
roundCone(
samplePosition: float3,coneCenter: float3,coneRadius: float,cornerRadius: float,height: float
) -> float
ellipsoid(
samplePosition: float3,center: float3,radius: float3
) -> float
rhombus(
samplePosition: float3,rhombusCenter: float3,la: float,lb: float,height: float,ra: float
) -> float
octahedron(
samplePosition: float3,center: float3,size: float
) -> float
pyramid(
samplePosition: float3,pyramidCenter: float3,height: float
) -> float
udTriangle(
samplePosition: float3,a: float3,b: float3,c: float3
) -> float
udQuad(
samplePosition: float3,a: float3,b: float3,c: float3,d: float3
) -> float
Returns the intersection of two SDFs = max(a, b)
intersect(
a: float,b: float
) -> float
Returns the union of two SDFs = min(a, b)
union(
a: float,b: float
) -> float
subtract(
a: float,b: float
) -> float
smoothIntersect(
a: float,b: float,k: float
) -> float
Smoothly joins two SDFs using blending distance k
smoothUnion(
a: float,b: float,k: float
) -> float
smoothSubtract(
a: float,b: float,k: float
) -> float
Blends between two SDFs using interpolation
blend(
a: float,b: float,t: float
) -> float
round(
a: float,r: float
) -> float
Carve out the interior of an SDF
onion(
a: float,thickness: float
) -> float
grad(
p: float3,sampler: (pos: float3) => float
) -> float3
Poorly returns the closest point on the surface of an SDF This is an inaccurate method
closest(
position: float3,sampler: (pos: float3) => float
) -> float3
normal(
position: float3,sampler: (pos: float3) => float
) -> float3
vizRings(
d: float
) -> float4
march(
position: float3,direction: float3,sampler: (pos: float3) => float
) -> float
See: https://iquilezles.org/articles/distfunctions/ Infinitely repeats an SDF with space in between. This returns an updated position
Example:
sdf::sphere(sdf::repeat(p, 100.xyz), 0.xyz, 50.0);
repeat(
position: float3,space: float3
) -> float3
See: https://iquilezles.org/articles/distfunctions/ Repeats an SDF with space in between upto the limit. This returns an updated position
Example:
sdf::sphere(sdf::repeatLimited(p, 100, 10.xyz), 0.xyz, 50.0);
repeatLimited(
position: float3,space: float,limit: float3
) -> float3
clone(
) -> sdf