Diff: CrossHairs/CrossHairs.cpp

Revision:

5:8bd09c675f28

Parent:

1:3916f272663e

--- a/CrossHairs/CrossHairs.cpp	Sun May 05 20:46:26 2019 +0000
+++ b/CrossHairs/CrossHairs.cpp	Wed May 08 19:41:10 2019 +0000
@@ -23,9 +23,11 @@
 
 void CrossHairs::init(int speed)
 {
-
+    //set the cross hairs x and y to centre of display
     _x = WIDTH/2 -  (7/2);
     _y = HEIGHT/2 - (7/2);
+    
+    //set the cross hairs max speed in pixels per frame
     _speed = speed;
 
 
@@ -39,20 +41,20 @@
  
 }
 
-void CrossHairs::update(float angle,float mag, int fps)
+void CrossHairs::update(float angle,float mag)
 {
-    //Correcting JoyStick to match screen angles
+    //Correcting JoyStick angle to match screen angles
     angle = angle - 90.0f;
     
     //Conversion To Radians
     double angleRads = (angle/360.0f)*2.0f*3.14f;
     
-    
-    
+    //incriment x and y based on an angle and magnitude 
     _x+= _speed*mag*cos(angleRads);
     _y += _speed*mag*sin(angleRads);
     
-    //check if cross hairs are outside screen
+    //check if cross hairs are outside screen boundary
+    //if they are outside the boundary set the problem coordinate to the boundary
     int halfCrossHairs = 3;
     if (_x < -halfCrossHairs) {
         _x = -halfCrossHairs;
@@ -65,9 +67,6 @@
         _y = 48-halfCrossHairs;
     }
         
-    
-    //_x = WIDTH/2 +  10.0*mag*cos(angleRads);
-    //_y = HEIGHT/2 + 10.0*mag*sin(angleRads);
 }