PolyListRenderer

Wraps a PolyList for rendering. One PolyListRenderer instance per PolyList instance manages the vertex and index buffers that represent the geometry data.

import PolyListRenderer from "bg2e-js/ts/render/PolyListRenderer.js";

const polyList = createSphere(0.5);
const renderer = myRenderer.factory.polyList(polyList);

Properties (Read)

Property	Type	Description
polyList	PolyList	The wrapped geometry data.
renderer	Renderer	The base renderer (WebGLRenderer) managing this PolyListRenderer.

Methods

init(): void

Initializes the internal buffers (vertexBuffer, indexBuffer). Called once on creation. No action needed by default — called automatically by the WebGL implementation.

refresh(): void

Updates internal buffers when the PolyList data changes (e.g., vertices, normals are added). Call after the polylist is modified.

polyList.addVertexPositions([...]);
renderer.refresh();  // Re-upload updated vertex data to GPU

bindBuffers(): void

Binds the PolyList’s vertex and index buffers to the current WebGL context, setting up all attribute pointers (positions, normals, texture coords). Called by RenderState.draw() before drawing.

draw(): void

Issues the WebGL draw call (drawElements for indexed, or drawArrays). Called by RenderState.draw().

destroy(): void

Releases all GPU resources (vertex and index buffers). Call when removing objects from the scene.

renderer.destroy();  // Destroys the PolyListRenderer
polyList._renderer = null;  // Clear the reference to allow disposal of the PolyList too