1 files changed, 54 insertions, 0 deletions
diff --git a/src/gui/Camera.h b/src/gui/Camera.h
new file mode 100644
index 0000000..fa17c58
--- /dev/null
+++ b/src/gui/Camera.h
@@ -0,0 +1,54 @@
+/*
+ * Camera.h
+ *
+ *  Created on: Mar 31, 2011
+ *      Author: jakob
+ */
+
+#ifndef CAMERA_H_
+#define CAMERA_H_
+#include <math.h>
+#include "exception.h"
+
+class Camera {
+
+private:
+	double _x;
+	double _y;
+	double _z;
+
+
+public:
+	Camera(double x, double y, double z): _x(x), _y(y), _z(z) {};
+	virtual ~Camera();
+
+
+
+	static double sign(double value) {return (value > 0) - (value < 0);}
+
+	static void toSpherical(double x, double y, double z, double& r, double&theta, double& phi) {
+		r = sqrt(x * x + y * y + z * z);
+		if (r == 0) {
+			theta = 0;
+			phi = 0;
+			return;
+		}
+
+		theta = acos(z / r);
+
+		if (x > 0) phi = atan(y / x);
+		else if (x == 0) phi = sign(y) * M_PI / 2;
+		else if (x < 0 && y >= 0) phi = atan(y / x) + M_PI;
+		else if (x < 0 && y < 0) phi = atan(y / x) - M_PI;
+		else throw vhc::Exception("This should not happen!");
+
+	}
+
+	static void toCarthesian(double r, double theta, double phi, double& x, double& y, double& z) {
+		x = r * sin(theta) * cos(phi);
+		y = r * sin(theta) * sin(phi);
+		z = r * cos(theta);
+	}
+};
+
+#endif /* CAMERA_H_ */