diff --git a/libs/main/containers/pivector2d.h b/libs/main/containers/pivector2d.h
index bd434075..dd21f4c5 100644
--- a/libs/main/containers/pivector2d.h
+++ b/libs/main/containers/pivector2d.h
@@ -785,6 +785,64 @@ public:
 		return *this;
 	}
 
+	// TODO: fix - memove existing elements
+	inline PIVector2D<T> & addEmptyRows(size_t count, const T & f = T()) {
+		if (count == 0 || cols_ == 0) return *this;
+		mat.resize(mat.size() + count * cols_, f);
+		rows_ += count;
+		return *this;
+	}
+
+	// TODO: fix - memove existing elements
+	inline PIVector2D<T> & addEmptyColumns(size_t count, const T & f = T()) {
+		if (count == 0 || rows_ == 0) return *this;
+		const size_t newCols = cols_ + count;
+		const size_t newSize = rows_ * newCols;
+		mat.resize(newSize);
+		for (size_t r = rows_ - 1; r < rows_; --r) {
+			for (size_t c = newCols - 1; c >= cols_; --c) {
+				element(r, c) = f;
+			}
+			for (size_t c = cols_; c > 0; --c) {
+				element(r, c - 1 + count) = element(r, c - 1);
+			}
+		}
+		cols_ = newCols;
+		return *this;
+	}
+
+	inline PIVector2D<T> & deleteRows(size_t row, size_t count) {
+		if (row >= rows_) return *this;
+		mat.remove(row * cols_, cols_ * count);
+		rows_ -= count;
+		if (mat.isEmpty()) {
+			cols_ = 0;
+			rows_ = 0;
+		}
+		return *this;
+	}
+
+	inline PIVector2D<T> & deleteColumns(size_t col, size_t count) {
+		if (col >= cols_ || rows_ == 0 || count == 0) return *this;
+		count = piMin(count, cols_ - col);
+		for (size_t r = 0; r < rows_; ++r) {
+			T * dst = mat.data(r * (cols_ - count));
+			T * src = mat.data(r * cols_);
+			if (col > 0) {
+				memmove(dst, src, col * sizeof(T));
+				dst += col;
+				src += col;
+			}
+			size_t remaining = (cols_ - count) - col;
+			if (remaining > 0) {
+				memmove(dst, src + 1, remaining * sizeof(T));
+			}
+		}
+		cols_ -= count;
+		mat.resize(rows_ * cols_);
+		return *this;
+	}
+
 	//! \~english Appends a new column to the right of the array from a \a ColConst.
 	//! \~russian Добавляет новую строку в конец массива из \a ColConst.
 	inline PIVector2D<T> & addColumn(const ColConst & other) {
@@ -880,7 +938,7 @@ public:
 			rows_ = rows;
 			return *this;
 		}
-		return __resize(rows, cols, f, std::is_trivially_copyable<T>());
+		return __resize(rows, cols, f);
 	}
 
 	//! \~english Equality operator.
@@ -1200,17 +1258,11 @@ public:
 	//! \~english Removes a row from the 2D array.
 	//! \~russian Удаляет строку из двумерного массива.
 	//! \details
-	//! \~english The elements of the specified row are destroyed, and all subsequent rows are shifted up.
-	//! If the last row is removed and the array becomes empty, \a cols() is set to 0.
-	//! \~russian Элементы указанной строки уничтожаются, а все последующие строки сдвигаются вверх.
-	//! Если удаляется последняя строка и массив становится пустым, \a cols() устанавливается в 0.
+	//! \~english If the last row is removed and the array becomes empty, \a cols() is set to 0.
+	//! \~russian Если удаляется последняя строка и массив становится пустым, \a cols() устанавливается в 0.
 	//! \sa removeColumn(), PIVector::remove()
 	inline PIVector2D<T> & removeRow(size_t row) {
-		if (row >= rows_) return *this;
-		mat.remove(row * cols_, cols_);
-		rows_--;
-		if (rows_ == 0) cols_ = 0;
-		return *this;
+		return deleteRows(row, 1);
 	}
 
 	//! \~english Removes a column from the 2D array.
@@ -1220,23 +1272,7 @@ public:
 	//! \~russian Эта операция дороже, чем удаление строки, поскольку требуется перемещение элементов.
 	//! \sa removeRow(), PIVector::remove()
 	inline PIVector2D<T> & removeColumn(size_t col) {
-		if (col >= cols_ || rows_ == 0) return *this;
-		for (size_t r = 0; r < rows_; ++r) {
-			T * dst = mat.data(r * (cols_ - 1));
-			T * src = mat.data(r * cols_);
-			if (col > 0) {
-				memmove(dst, src, col * sizeof(T));
-				dst += col;
-				src += col;
-			}
-			size_t remaining = (cols_ - 1) - col;
-			if (remaining > 0) {
-				memmove(dst, src + 1, remaining * sizeof(T));
-			}
-		}
-		cols_--;
-		mat.resize(rows_ * cols_);
-		return *this;
+		return deleteColumns(col, 1);
 	}
 
 	//! \~english Removes all rows that satisfy a condition.
@@ -1307,31 +1343,19 @@ public:
 	}
 
 protected:
-	template<typename T1 = T, typename std::enable_if<std::is_trivially_copyable<T1>::value, int>::type = 0>
-	inline PIVector2D<T> & __resize(size_t rows, size_t cols, const T & f, std::true_type) {
-		PIVector2D<T> tmp(rows, cols, f);
-		const size_t copyRows = piMin<size_t>(rows_, rows);
-		const size_t copyCols = piMin<size_t>(cols_, cols);
-		for (size_t r = 0; r < copyRows; ++r) {
-			T * dst = tmp.mat.data() + r * cols;
-			T * src = mat.data() + r * cols_;
-			memmove(dst, src, copyCols * sizeof(T));
+	inline PIVector2D<T> & __resize(size_t rows, size_t cols, const T & f) {
+		if (cols > cols_) {
+			addEmptyColumns(cols - cols_, f);
 		}
-		swap(tmp);
-		return *this;
-	}
-
-	template<typename T1 = T, typename std::enable_if<!std::is_trivially_copyable<T1>::value, int>::type = 0>
-	inline PIVector2D<T> & __resize(size_t rows, size_t cols, const T & f, std::false_type) {
-		PIVector2D<T> tmp(rows, cols, f);
-		const size_t copyRows = piMin<size_t>(rows_, rows);
-		const size_t copyCols = piMin<size_t>(cols_, cols);
-		for (size_t r = 0; r < copyRows; ++r) {
-			for (size_t c = 0; c < copyCols; ++c) {
-				tmp.element(r, c) = element(r, c);
-			}
+		if (rows > rows_) {
+			addEmptyRows(rows - rows_, f);
+		}
+		if (cols < cols_) {
+			deleteColumns(cols, cols_ - cols);
+		}
+		if (rows < rows_) {
+			deleteRows(rows, rows_ - rows);
 		}
-		swap(tmp);
 		return *this;
 	}