update package.json

mreinstein · Apr 18, 2019 · 0514e45 · 0514e45
1 parent b12863a
commit 0514e45
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Showing 3 changed files with 40 additions and 2,319 deletions.
diff --git a/README.md b/README.md
@@ -31,43 +31,45 @@ ECS.addComponentToEntity(world, PLAYER, MOVEABLE)
 
 // update entity velocity based on key pressed
 function keyboardControlSystem (world) {
-	const moveableFilter = ECS.createFilter(world, [ MOVEABLE ])
+    // declare a filter that is used at run time to choose which entities to operate on
+    // the 2nd argument is all of the required component types the entity must have to
+    // be included
+    const moveableFilter = ECS.createFilter(world, [ MOVEABLE ])
 
     // called each game loop
     const onUpdate = function () {
-    	// get all of the entities in the world that have a moveable component
-    	for (const entity of ECS.getEntities(world, moveFilter)) {
-	        // update the entity position according to what is pressed
-	        if (Keyboard.keyPressed('up'))
-	        	entity.moveable.dy -= 1;
-	        if (Keyboard.keyPressed('down'))
-	        	entity.moveable.dy += 1;
-	        if (Keyboard.keyPressed('left'))
-	        	entity.moveable.dx -= 1;
-	        if (Keyboard.keyPressed('right'))
-	        	entity.moveable.dx += 1;
-
-	       entity.moveable.dx = clamp(entity.moveable.dx, -10, 10);
-	       entity.moveable.dy = clamp(entity.moveable.dy, -10, 10);
-	    }
+        // get all of the entities in the world that pass the filter
+        for (const entity of ECS.getEntities(world, moveFilter)) {
+            // update the entity position according to what is pressed
+            if (Keyboard.keyPressed('up'))
+                entity.moveable.dy -= 1;
+            if (Keyboard.keyPressed('down'))
+                entity.moveable.dy += 1;
+            if (Keyboard.keyPressed('left'))
+                entity.moveable.dx -= 1;
+            if (Keyboard.keyPressed('right'))
+                entity.moveable.dx += 1;
+
+           entity.moveable.dx = clamp(entity.moveable.dx, -10, 10);
+           entity.moveable.dy = clamp(entity.moveable.dy, -10, 10);
+        }
     }
 
     return { onUpdate }
 }
 
 
 function movementSystem (world) {
-	const moveFilter = ECS.createFilter(world, [ POSITION, MOVEABLE ])
+    const moveFilter = ECS.createFilter(world, [ POSITION, MOVEABLE ])
 
-	const onUpdate = function () {
-		// get all of the entities in the world that can be moved
-		for (const entity of ECS.getEntities(world, moveFilter)) {
-			entity.position.x += entity.moveable.dx
-			entity.position.y += entity.moveable.dy
-		}
-	}
+    const onUpdate = function () {
+        for (const entity of ECS.getEntities(world, moveFilter)) {
+            entity.position.x += entity.moveable.dx
+            entity.position.y += entity.moveable.dy
+        }
+    }
 
-	return { onUpdate }
+    return { onUpdate }
 }