www.pudn.com > ucosv2(GUI).rar > GUIPolyR.c

/*
*********************************************************************************************************
*                                                uC/GUI
*                        Universal graphic software for embedded applications
*
*                       (c) Copyright 2002, Micrium Inc., Weston, FL
*                       (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
*
*              µC/GUI is protected by international copyright laws. Knowledge of the
*              source code may not be used to write a similar product. This file may
*              only be used in accordance with a license and should not be redistributed
*              in any way. We appreciate your understanding and fairness.
*
---------------------------------------------------------------------- 
File        : GUIPolyR.c 
Purpose     : Polygon rotation 
---------------------------------------------------------------------- 
*/ 
 
#include  
#include "GUI.H" 
 
 
 
/******************************************************************* 
* 
*                  GUI_RotatePolygon 
* 
******************************************************************** 
*/ 
 
void GUI_RotatePolygon(GUI_POINT* pDest, const GUI_POINT* pSrc, int NumPoints, float Angle) { 
  int j; 
  float fcos = cos(Angle); 
  float fsin = sin(Angle); 
  for (j=0; jx; 
    int y = (pSrc+j)->y; 
    (pDest+j)->x =  x * fcos + y * fsin; 
    (pDest+j)->y = -x * fsin + y * fcos; 
  } 
}