playcanvas

Version:
Open-source WebGL/WebGPU 3D engine for the web
35 lines (33 loc) • 1.12 kB
JavaScript
class GSplatPlacementStateTracker {
		hasChanges(placements) {
				let changed = false;
				for (const p of placements){
						if (!p.resource) continue;
						const formatVersion = p.resource.format?.extraStreamsVersion ?? 0;
						const modifierHash = p.workBufferModifier?.hash ?? 0;
						const numSplats = p.resource.numSplats ?? 0;
						const centersVersion = p.resource.centersVersion;
						const state = this._states.get(p);
						if (!state) {
								this._states.set(p, {
										formatVersion,
										modifierHash,
										numSplats,
										centersVersion
								});
								changed = true;
						} else if (state.formatVersion !== formatVersion || state.modifierHash !== modifierHash || state.numSplats !== numSplats || state.centersVersion !== centersVersion) {
								state.formatVersion = formatVersion;
								state.modifierHash = modifierHash;
								state.numSplats = numSplats;
								state.centersVersion = centersVersion;
								changed = true;
						}
				}
				return changed;
		}
		constructor(){
				this._states = new WeakMap();
		}
}

export { GSplatPlacementStateTracker };