Clamp joystick range

Joystick was hitting cardinal directions fine, but diagonals overflowed the circular range.

This change normalises the joystick if its vector length exceeds 1. Clamping it to a circle of r=1.

32blit-stm32/Src/32blit.cpp

diff --git a/32blit-stm32/Src/32blit.cpp b/32blit-stm32/Src/32blit.cpp
index 1e08c57..de8f822 100644
--- a/32blit-stm32/Src/32blit.cpp
+++ b/32blit-stm32/Src/32blit.cpp
@@ -804,6 +804,10 @@
   }

   blit::joystick.y = -joystick_y / 7168.0f;

 

+  if(blit::joystick.length() > 1.0){

+    blit::joystick.normalize();

+  }

+

   blit::hack_left = (adc3data[0] >> 1) / 32768.0f;

   blit::hack_right = (adc3data[1] >> 1)  / 32768.0f;