fog clipping: properly invalidate projection matrix

src/main/java/de/bixilon/minosoft/gui/rendering/camera/MatrixHandler.kt

@@ -127,9 +127,7 @@ class MatrixHandler(
         this.matrixPosition = matrixPosition
         this.front = front
         val cameraBlockPosition = eyePosition.blockPosition
-        if (fov != previousFOV) {
-            calculateProjectionMatrix(fov)
-        }
+        calculateProjectionMatrix(fov)
         previousFOV = fov
 
         updateFront(front)
@@ -179,4 +177,8 @@ class MatrixHandler(
             }
         }
     }
+
+    fun invalidate() {
+        upToDate = false
+    }
 }

src/main/java/de/bixilon/minosoft/gui/rendering/camera/fog/FogManager.kt

@@ -78,6 +78,7 @@ class FogManager(
         save()
         this.options = options
         state.revision++
+        context.camera.matrixHandler.invalidate()
     }
 
     private fun save() {
@@ -108,6 +109,7 @@ class FogManager(
         }
 
         state.revision++
+        context.camera.matrixHandler.invalidate()
     }