Be explicit about type of angles: either Radians or Degrees.

Angles are always doubles.
Internally use radians as much as possible.

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@1605 0fc631ac-6414-0410-93d0-97cfa31319b6

src/data/action/symbol.cpp

@@ -129,8 +129,8 @@ void SymbolPartRotateAction::perform(bool to_undo) {
 	angle = -angle;
 }
 
-void SymbolPartRotateAction::rotateTo(double newAngle) {
-	double oldAngle = angle;
+void SymbolPartRotateAction::rotateTo(Radians newAngle) {
+	Radians oldAngle = angle;
 	angle = newAngle;
 	// constrain?
 	if (constrain) {
@@ -141,7 +141,7 @@ void SymbolPartRotateAction::rotateTo(double newAngle) {
 	if (oldAngle != angle) rotateBy(angle - oldAngle);
 }
 
-void SymbolPartRotateAction::rotateBy(double deltaAngle) {
+void SymbolPartRotateAction::rotateBy(Radians deltaAngle) {
 	// Rotation 'matrix'
 	transform(
 		Matrix2D(cos(deltaAngle), -sin(deltaAngle)

src/data/action/symbol.hpp

@@ -85,13 +85,13 @@ class SymbolPartRotateAction : public SymbolPartMatrixAction {
 	virtual void   perform(bool to_undo);
 	
 	/// Update this action to rotate to a different angle
-	void rotateTo(double newAngle);
+	void rotateTo(Radians newAngle);
 	
 	/// Update this action to rotate by a deltaAngle
-	void rotateBy(double deltaAngle);
+	void rotateBy(Radians deltaAngle);
 	
   private:
-	double angle;				///< How much to rotate?
+	Radians angle;				///< How much to rotate?
   public:
 	bool constrain;				///< Constrain movement?
 };

src/data/action/symbol_part.cpp

@@ -459,8 +459,8 @@ void SymmetryMoveAction::move(const Vector2D& deltaDelta) {
 		symmetry.handle = snap_vector(symmetry.center + original + delta, snap) - symmetry.center;
 		if (constrain) {
 			// constrain to multiples of 2pi/24 i.e. 24 stops
-			double angle = atan2(symmetry.handle.y, symmetry.handle.x);
-			double mult = (2 * M_PI) / 24;
+			Radians angle = atan2(symmetry.handle.y, symmetry.handle.x);
+			Radians mult = (2 * M_PI) / 24;
 			angle = floor(angle / mult + 0.5) * mult;
 			symmetry.handle = Vector2D(cos(angle), sin(angle)) * symmetry.handle.length();
 		}