Diff: Controller.cpp

Revision:

26:ccdf299b26c4

Parent:

24:7b149f5d4bef

Child:

27:d51c87ced56e

--- a/Controller.cpp	Sun Apr 16 19:38:43 2017 +0000
+++ b/Controller.cpp	Sun Apr 16 21:18:08 2017 +0000
@@ -29,8 +29,9 @@
 
     _timeout(new Timeout()),
 
-    _event_state(0)
-
+    _event_state(0),
+    _x0(0)
+    
 {}
 
 Controller::~Controller()
@@ -50,6 +51,8 @@
 
     // clear all flags
     _event_state = 0;  
+    // read  joystick
+    _x0 = _horiz->read();
 }
 
 void Controller::ledsOFF()
@@ -215,6 +218,21 @@
     _event_state.set(JOY_PRESSED);
 }
 
+
+
+// get raw joystick coordinate for x in range -1 to 1
+// North     (0,1)
+// South     (0,-1)
+
+float Controller::get_joy()
+{
+    // read() returns value in range 0.0 to 1.0 so is scaled and centre value
+    // substracted to get values in the range -1.0 to 1.0
+    float x = 2.0f*( _horiz->read() - _x0 );
+    return x;
+}
+
+
 int Controller::check_for_buttons() {
     if (check_event(A_PRESSED)) { 
         return 1;  }