function MeshBatchUvs(uvBuffer, uvMatrix) {
        this.uvBuffer = uvBuffer;
        this.uvMatrix = uvMatrix;
        this.data = null;
        this._bufferUpdateId = -1;
        this._textureUpdateId = -1;
        this._updateID = 0;
    }
@param uvBuffer - Buffer with normalized uv's
@param uvMatrix - Material UV matrix