sdf/eval

src/sdf/eval.tur

CPU evaluator for SdfExpr trees.

Since: Phase 1

defn

sdf-eval

(sdf-eval [e : int px : float py : float pz : float] :)

evaluate an SdfExpr at point (px, py, pz).

Parameters

e		SdfExpr handle
		px py pz -- query point components

Returns

Signed distance: negative inside the surface, zero on it, positive outside.

Example

(sdf-eval (sdf-sphere 0.0 0.0 0.0 1.0) 0.5 0.0 0.0)  ; => -0.5

Since: Phase 1

defn

(sdf-normal-x [e : int px : float py : float pz : float] :)

x component of the surface normal at (px,py,pz).

Since: Phase 1

defn

(sdf-normal-y [e : int px : float py : float pz : float] :)

y component of the surface normal at (px,py,pz). Since: Phase 1

defn

(sdf-normal-z [e : int px : float py : float pz : float] :)

z component of the surface normal at (px,py,pz). Since: Phase 1