www.pudn.com > UCGUI390a.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. 
* 
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File        : GUIPolyR.c 
Purpose     : Polygon rotation 
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*/ 
 
#include  
#include "GUI.h" 
 
/********************************************************************* 
* 
*       Public code 
* 
********************************************************************** 
*/ 
/********************************************************************* 
* 
*       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; 
  } 
} 
 
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