refactor: replace bit flag with a boolean

Author: AlmasB

fxgl-entity/src/main/java/com/almasb/fxgl/physics/box2d/dynamics/Body.java

@@ -31,7 +31,6 @@ public final class Body {
     private static final int e_islandFlag = 0x0001;
 
     private static final int e_awakeFlag = 0x0002;
-    private static final int e_autoSleepFlag = 0x0004;
     private static final int e_bulletFlag = 0x0008;
     private static final int e_fixedRotationFlag = 0x0010;
     private static final int e_activeFlag = 0x0020;
@@ -46,6 +45,8 @@ public final class Body {
 
     public int m_flags = 0;
 
+    private boolean isSleepingAllowed = false;
+
     public int m_islandIndex;
 
     /**
@@ -102,7 +103,7 @@ public final class Body {
             m_flags |= e_fixedRotationFlag;
         }
         if (bd.isAllowSleep()) {
-            m_flags |= e_autoSleepFlag;
+            isSleepingAllowed = true;
         }
         if (bd.isAwake()) {
             m_flags |= e_awakeFlag;
@@ -966,10 +967,9 @@ void setIslandFlag(boolean flag) {
      * @param flag sleep flag
      */
     public void setSleepingAllowed(boolean flag) {
-        if (flag) {
-            m_flags |= e_autoSleepFlag;
-        } else {
-            m_flags &= ~e_autoSleepFlag;
+        isSleepingAllowed = flag;
+
+        if (!isSleepingAllowed) {
             setAwake(true);
         }
     }
@@ -978,7 +978,7 @@ public void setSleepingAllowed(boolean flag) {
      * @return whether this body is allowed to sleep
      */
     public boolean isSleepingAllowed() {
-        return (m_flags & e_autoSleepFlag) == e_autoSleepFlag;
+        return isSleepingAllowed;
     }
 
     /**

fxgl-entity/src/test/kotlin/com/almasb/fxgl/physics/box2d/dynamics/BodyTest.kt

@@ -0,0 +1,50 @@
+/*
+ * FXGL - JavaFX Game Library. The MIT License (MIT).
+ * Copyright (c) AlmasB (almaslvl@gmail.com).
+ * See LICENSE for details.
+ */
+
+package com.almasb.fxgl.physics.box2d.dynamics
+
+import com.almasb.fxgl.core.math.Vec2
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.Test
+
+/**
+ *
+ * @author Almas Baimagambetov (almaslvl@gmail.com)
+ */
+class BodyTest {
+
+    @Test
+    fun `Body def sets body flags`() {
+        val def = BodyDef()
+        def.isActive = true
+        def.isAllowSleep = true
+        def.isBullet = true
+        def.isFixedRotation = true
+        def.isAwake = true
+
+        val world = World(Vec2())
+
+        val body = Body(def, world)
+
+        assertTrue(body.isActive)
+        assertTrue(body.isSleepingAllowed)
+        assertTrue(body.isBullet)
+        assertTrue(body.isFixedRotation)
+        assertTrue(body.isAwake)
+
+        body.isActive = false
+        body.isSleepingAllowed = false
+        body.isBullet = false
+        body.isFixedRotation = false
+        body.isAwake = false
+
+        assertFalse(body.isActive)
+        assertFalse(body.isSleepingAllowed)
+        assertFalse(body.isBullet)
+        assertFalse(body.isFixedRotation)
+        assertFalse(body.isAwake)
+    }
+}