[Scummvm-cvs-logs] SF.net SVN: scummvm:[47709] scummvm/trunk/backends/platform/n64/ osys_n64_events.cpp

[Hkz at users.sourceforge.net]

Revision: 47709
          http://scummvm.svn.sourceforge.net/scummvm/?rev=47709&view=rev
Author:   Hkz
Date:     2010-01-30 12:57:57 +0000 (Sat, 30 Jan 2010)

Log Message:
-----------
N64: added comments and slight cleanup

Modified Paths:
--------------
    scummvm/trunk/backends/platform/n64/osys_n64_events.cpp

Modified: scummvm/trunk/backends/platform/n64/osys_n64_events.cpp
===================================================================
--- scummvm/trunk/backends/platform/n64/osys_n64_events.cpp	2010-01-30 12:53:08 UTC (rev 47708)
+++ scummvm/trunk/backends/platform/n64/osys_n64_events.cpp	2010-01-30 12:57:57 UTC (rev 47709)
@@ -23,10 +23,10 @@
  *
  */
 
+#include <math.h> // Needed for "tan()" function
+
 #include "osys_n64.h"
 
-#include <math.h>
-
 // Pad buttons
 #define START_BUTTON(a) (a & 0x1000)
 #define A_BUTTON(a)     (a & 0x8000)
@@ -77,21 +77,23 @@
 	float mx = _tempMouseX;
 	float my = _tempMouseY;
 
+	// Limit the analog range for pad.
+	// When moving in diagonal the max/min of 128/-128 was not reached
+	// yielding weird results for the tangent acceleration function
 	if (pad_analogX > 60) pad_analogX = 60;
 	else if (pad_analogX < -60) pad_analogX = -60;
-
 	if (pad_analogY > 60) pad_analogY = 60;
 	else if (pad_analogY < -60) pad_analogY = -60;
 
+	// Gamepad
 	if (abs(pad_analogX) > PAD_DEADZONE)
 		mx += tan(pad_analogX * (PI / 140));
-
 	if (abs(pad_analogY) > PAD_DEADZONE)
 		my -= tan(pad_analogY * (PI / 140));
 
+	// Mouse
 	if (abs(pad_mouseX) > MOUSE_DEADZONE)
 		mx += pad_mouseX;
-
 	if (abs(pad_mouseY) > MOUSE_DEADZONE)
 		my -= pad_mouseY;
 


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