- added armadillo_eval

git-svn-id: http://moon:8086/svn/software/trunk/projects/armadillo_eval@557 b431acfa-c32f-4a4a-93f1-934dc6c82436
2019-10-19 12:12:36 +00:00
commit 3617ac6fae
2 changed files with 50 additions and 0 deletions
@@ -0,0 +1,34 @@
+#include <cstdio>
+#include <cmath>
+#include <armadillo>
+
+int main()
+{
+	printf("Hallo, Welt!\n");
+
+	// Position of a particle                     //    |
+	arma::vec Pos = {{0},                         //    | (0,1)
+				   {1}};                        //    +---x-->
+
+	// Rotation matrix 
+	double phi = -3.1416/2; 
+	arma::mat RotM = {{+cos(phi), -sin(phi)},
+					{+sin(phi), +cos(phi)}};
+
+	Pos.print("Current position of the particle:");
+	std::cout << "Rotating the point " << phi*180/3.1416 << " deg" << std::endl;
+
+	Pos = RotM*Pos;
+
+	Pos.print("New position of the particle:");   //    ^
+												//    x (1,0)
+												//    | 
+	arma::mat Z = arma::eye<arma::mat>(4,4);
+	Z.print("Z:");
+	printf("Z.n_rows = %d\n", (int)Z.n_rows);
+	printf("Z.n_cols = %d\n", (int)Z.n_cols);
+	printf("Z.n_elem = %d\n", (int)Z.n_elem);
+	//    +------>
+
+	return 0;
+}