How to use the mage-engine.THREE.Math function in mage-engine

onKeyPress = ({ event }) => {
        switch (event.key) {
			case "q": // Q
				this.transform.setSpace(this.transform.space === "local" ? "world" : "local");
				break;
			case "ctrl": // Ctrl
				this.transform.setTranslationSnap(100);
				this.transform.setRotationSnap(THREE.Math.degToRad(15));
				break;
			case "w": // W
				this.transform.setMode("translate");
				break;
			case "e": // E
				this.transform.setMode("rotate");
				break;
			case "r": // R
				this.transform.setMode("scale");
				break;
			case 187:
			case 107: // +, =, num+
				this.transform.setSize(this.transform.size + 0.1);
				break;
			case 189:
			case 109: // -, _, num-