import type { ObjectType, VoxelGroup, VoxelType } from "../../types";

export function getObjectVoxelGroups(
    object: ObjectType,
    voxelTypes: Record<string, VoxelType>,
): VoxelGroup[] {
    const map = new Map<string, VoxelGroup>();
    for (const idx in object.voxels) {
        const v = object.voxels[idx];
        const vt = voxelTypes[v.typeId];
        const color = (v.color ?? vt?.color) ?? 'white';
        const opacity = (v.opacity ?? vt?.opacity) ?? 1;
        const key = `${color}-${opacity}`;
        if (!map.has(key))
            map.set(key, { id: key, color, opacity, positions: [] });
        const p = v.position;
        map.get(key)!.positions.push(p);
    }
    return [...map.values()];
}