add new parallax attributes.

Old attribute: parallax
New attributes: parallaxX, parallaxY

Before parallax was used for x and y.
If parallaxX or parallaxY missing can be used parallax.

2 files changed, 10 insertions, 6 deletions

diff --git a/src/resources/ambientlayer.cpp b/src/resources/ambientlayer.cpp
index 361b2e391..b74ba96db 100644
--- a/src/resources/ambientlayer.cpp
+++ b/src/resources/ambientlayer.cpp
@@ -31,11 +31,13 @@
 
 #include "debug.h"
 
-AmbientLayer::AmbientLayer(Image *const img, const float parallax,
+AmbientLayer::AmbientLayer(Image *const img,
+                           const float parallaxX, const float parallaxY,
                            const float speedX, const float speedY,
                            const bool keepRatio, const int mask) :
     mImage(img),
-    mParallax(parallax),
+    mParallaxX(parallaxX),
+    mParallaxY(parallaxY),
     mPosX(0),
     mPosY(0),
     mSpeedX(speedX),
@@ -90,8 +92,8 @@ void AmbientLayer::update(const int timePassed, const float dx, const float dy)
     mPosY -= mSpeedY * time;
 
     // Parallax scrolling
-    mPosX += dx * mParallax;
-    mPosY += dy * mParallax;
+    mPosX += dx * mParallaxX;
+    mPosY += dy * mParallaxY;
 
     const SDL_Rect &rect = mImage->mBounds;
     const float imgW = rect.w;
diff --git a/src/resources/ambientlayer.h b/src/resources/ambientlayer.h
index 4ce13179e..ab8202ba7 100644
--- a/src/resources/ambientlayer.h
+++ b/src/resources/ambientlayer.h
@@ -43,7 +43,8 @@ class AmbientLayer final
          * @param keepRatio  rescale the image to keep
          * the same ratio than in 800x600 resolution mode.
          */
-        AmbientLayer(Image *const img, const float parallax,
+        AmbientLayer(Image *const img,
+                     const float parallax, const float parallaxY,
                      const float speedX, const float speedY,
                      const bool keepRatio, const int mask);
 
@@ -57,7 +58,8 @@ class AmbientLayer final
 
     private:
         Image *mImage;
-        float mParallax;
+        float mParallaxX;
+        float mParallaxY;
         float mPosX;             /**< Current layer X position. */
         float mPosY;             /**< Current layer Y position. */
         float mSpeedX;           /**< Scrolling speed in X direction. */