Renderer · interface

FieldMarch

How the march is shaped.

interface FieldMarch

import type { FieldMarch } from '@driftengine/core';

Properties

Name	Type	Description
`steps`readonly	`number`	The most samples one ray may take. A converging march uses a fraction of this.
`reachM`readonly	`number`	How far the ray travels in world metres before it gives up.
`coneAngle`readonly	`number`	Half-angle of the cone, in radians. Zero is a pencil ray. More A rough surface reflects a lobe rather than a ray, and a cone is how a distance field traces one: the radius grows with the distance travelled and a hit is where the field falls below that rather than below a constant. The blur is then correct by construction — a wide cone stops further from a surface, so what it gathers is a broader patch of it — instead of being a filter applied to a sharp answer afterwards.
`hitEpsilonM`readonly	`number`	How close to a surface counts as arriving, in metres, before the cone's own radius.