GUIPolyR.c
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上传日期:2017-08-10
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- /*
- *********************************************************************************************************
- * uC/GUI
- * Universal graphic software for embedded applications
- *
- * (c) Copyright 2002, Micrium Inc., Weston, FL
- * (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
- *
- * 礐/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 <math.h>
- #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; j<NumPoints; j++) {
- int x = (pSrc+j)->x;
- int y = (pSrc+j)->y;
- (pDest+j)->x = x * fcos + y * fsin;
- (pDest+j)->y = -x * fsin + y * fcos;
- }
- }