BoltBatch

One draw call for a pool of electrical arcs.

class BoltBatch

import { BoltBatch } from '@driftengine/core';

In depth

Four vertices per segment rather than instancing, because a segment's two endpoints are its geometry — there is no repeated base shape to instance, and an instanced version would upload the same two positions per vertex anyway.

Additive and depth-tested without writing depth, like every other emissive effect here: an arc adds light to what is behind it and must not occlude whatever is drawn next.

Constructor

`new`

constructor(gl: WebGL2RenderingContext, capacity: number, label: string)

Parameter	Type	Description
`gl`	`WebGL2RenderingContext`
`capacity`	`number`
`label`	`string`

Properties

Name	Type	Description
`program`readonly	`WebGLProgram`
`uniforms`readonly	`Record<string, WebGLUniformLocation>`

Methods

`upload`

upload(gl: WebGL2RenderingContext, data: BoltSegments): number

Send this frame's arcs, expanding each segment to its four vertices.

Parameter	Type	Description
`gl`	`WebGL2RenderingContext`
`data`	`BoltSegments`

The expansion is segmentQuads.ts's because it is a fact about how the geometry is drawn rather than about GL — the pool is deliberately GL-free and testable, and the WebGPU batch needs exactly the same four vertices.

`drawTo`

drawTo(gl: WebGL2RenderingContext, segmentCount: number): void

Parameter	Type	Description
`gl`	`WebGL2RenderingContext`
`segmentCount`	`number`

`dispose`

dispose(gl: WebGL2RenderingContext): void

Parameter	Type	Description
`gl`	`WebGL2RenderingContext`