Add camera zoom tweening

Author: bitbrain

Diff for: 2d/src/main/java/de/bitbrain/braingdx/graphics/VectorGameCamera.java

@@ -138,6 +138,11 @@ public void update(float delta) {
       lastShake.set(shake);
    }
 
+   @Override
+   public float getZoomModeValue() {
+      return zoomModeValue;
+   }
+
    @Override
    public void setDistanceStoppingThreshold(float distanceThreshold) {
       this.distanceThreshold = distanceThreshold;

Diff for: CHANGELOG.md

@@ -1,3 +1,7 @@
+# Version 0.6.30
+
+* add camera zoom tweening
+
 # Version 0.6.29
 
 * add additional constructors to `AnimationSpritesheet`

Diff for: core/src/main/java/de/bitbrain/braingdx/graphics/GameCamera.java

@@ -36,6 +36,8 @@ enum ZoomMode {
       TO_HEIGHT;
    }
 
+   float getZoomModeValue();
+
    /**
     * Sets a new threshold to where the camera should stop tracking.
     * The distance also takes camera zoom into account.

Diff for: core/src/main/java/de/bitbrain/braingdx/tweens/GameCameraTween.java

@@ -7,6 +7,8 @@ public class GameCameraTween implements TweenAccessor<GameCamera> {
 
    public static final int DEFAULT_ZOOM_FACTOR = 1;
    public static final int TARGET_TRACKING_SPEED = 2;
+   public static final int ZOOM_WIDTH = 3;
+   public static final int ZOOM_HEIGHT = 4;
 
    @Override
    public int getValues(GameCamera target, int tweenType, float[] returnValues) {
@@ -17,6 +19,11 @@ public int getValues(GameCamera target, int tweenType, float[] returnValues) {
          case TARGET_TRACKING_SPEED:
             returnValues[0] = target.getTargetTrackingSpeed();
             return 1;
+         case ZOOM_WIDTH:
+         case ZOOM_HEIGHT:
+            returnValues[0] = target.getZoomModeValue();
+            return 1;
+
       }
       return 0;
    }
@@ -30,6 +37,12 @@ public void setValues(GameCamera target, int tweenType, float[] newValues) {
          case TARGET_TRACKING_SPEED:
             target.setTargetTrackingSpeed(newValues[0]);
             break;
+         case ZOOM_WIDTH:
+            target.setZoom(newValues[0], GameCamera.ZoomMode.TO_WIDTH);
+            break;
+         case ZOOM_HEIGHT:
+            target.setZoom(newValues[0], GameCamera.ZoomMode.TO_HEIGHT);
+            break;
       }
    }
 }