feat(eyeAdaption): make eye adaption effect more noticeable (#77)

* add new field to eye adaption, and changed values for better performance
* change field value to make it feel better

src/main/java/org/terasology/corerendering/rendering/dag/nodes/UpdateExposureNode.java

@@ -27,21 +27,23 @@
  */
 public class UpdateExposureNode extends AbstractNode {
     @SuppressWarnings("FieldCanBeLocal")
-    @Range(min = 0.0f, max = 10.0f)
-    private float hdrExposureDefault = 5f;
+    @Range(min = 0.0f, max = 20.0f)
+    private float hdrExposureDefault = 8f;
     @SuppressWarnings("FieldCanBeLocal")
-    @Range(min = 0.0f, max = 10.0f)
-    private float hdrMaxExposure = 8.0f;
+    @Range(min = 0.0f, max = 80.0f)
+    private float hdrMaxExposure = 80.0f;
     @SuppressWarnings("FieldCanBeLocal")
-    @Range(min = 0.0f, max = 10.0f)
-    private float hdrMinExposure = 1.0f;
+    @Range(min = 0.0f, max = 20.0f)
+    private float hdrMinExposure = 10.0f;
     @SuppressWarnings("FieldCanBeLocal")
-    @Range(min = 0.0f, max = 4.0f)
-    private float hdrTargetLuminance = 1.0f;
+    @Range(min = 0.0f, max = 10.0f)
+    private float hdrTargetLuminance = 8.0f;
     @SuppressWarnings("FieldCanBeLocal")
     @Range(min = 0.0f, max = 0.5f)
-    private float hdrExposureAdjustmentSpeed = 0.05f;
-
+    private float hdrExposureAdjustmentSpeed = 0.04f;
+    @SuppressWarnings("FieldCanBeLocal")
+    @Range(min = 0.0f, max = 40f)
+    private float hdrExposureOffset = 40;
     private ScreenGrabber screenGrabber;
 
     private RenderingConfig renderingConfig;
@@ -90,7 +92,7 @@ public void process() {
             float targetExposure = hdrMaxExposure;
 
             if (currentSceneLuminance > 0) {
-                targetExposure = hdrTargetLuminance / currentSceneLuminance;
+                targetExposure = hdrTargetLuminance / currentSceneLuminance - hdrExposureOffset;
             }
 
             float maxExposure = hdrMaxExposure;