47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
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#ifndef MATRIXOPERATIONS_H_
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#define MATRIXOPERATIONS_H_
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#include <cmath>
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#include <stdint.h>
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template<typename T>
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class MatrixOperations {
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public:
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virtual ~MatrixOperations() {
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}
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//do not use with result == matrix1 or matrix2 //TODO?
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static void multiply(const T *matrix1, const T *matrix2, T *result,
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uint8_t rows1, uint8_t columns1, uint8_t columns2) {
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for (uint8_t resultColumn = 0; resultColumn < columns2;
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resultColumn++) {
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for (uint8_t resultRow = 0; resultRow < rows1; resultRow++) {
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result[resultColumn + columns2 * resultRow] = 0;
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for (uint8_t i = 0; i < columns1; i++) {
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result[resultColumn + columns2 * resultRow] += matrix1[i
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+ resultRow * columns1]
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* matrix2[resultColumn + i * columns2];
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}
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}
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}
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}
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static void transpose(const T *matrix, T *transposed, uint8_t size) {
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uint8_t row, column;
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transposed[0] = matrix[0];
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for (column = 1; column < size; column++) {
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transposed[column + size * column] = matrix[column + size * column];
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for (row = 0; row < column; row++) {
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T temp = matrix[column + size * row];
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transposed[column + size * row] = matrix[row + size * column];
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transposed[row + size * column] = temp;
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}
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}
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}
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private:
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MatrixOperations();
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};
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#endif /* MATRIXOPERATIONS_H_ */
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