push(x, y, u, v, tint) {
		let offset = this.vertexCount * this.vertexSize;

		if (this.vertexCount >= this.maxVertex) {
			this.resize(this.vertexCount);
		}

		this.bufferF32[offset] = x;
		this.bufferF32[++offset] = y;

		if (typeof u !== "undefined") {
			this.bufferF32[++offset] = u;
			this.bufferF32[++offset] = v;
		}

		if (typeof tint !== "undefined") {
			this.bufferU32[++offset] = tint;
		}

		this.vertexCount++;

		return this;
	}
push a new vertex to the buffer
@ignore