@three.ez/batched-mesh-extensions/src/core/MultiDrawRenderList.js

Utility extension methods for BatchedMesh

/**
 * A class that creates and manages a list of render items, used to determine the rendering order based on depth.
 * @internal
 */
export class MultiDrawRenderList {
    constructor() {
        this.array = [];
        this.pool = [];
    }
    push(instanceId, depth, start, count) {
        const pool = this.pool;
        const list = this.array;
        const index = list.length;
        if (index >= pool.length) {
            pool.push({ start: null, count: null, z: null, zSort: null, index: null });
        }
        const item = pool[index];
        item.index = instanceId;
        item.start = start;
        item.count = count;
        item.z = depth;
        list.push(item);
    }
    reset() {
        this.array.length = 0;
    }
}
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