www.pudn.com > Movement_VC.rar > VirtualSphere.cpp

///////////////////////////////////////////////////////////////////////////////// 
//	 
// VirtualSphere.cpp: implementation of the CVirtualSphere class. 
// 
//////////////////////////////////////////////////////////////////////////////// 
// 版权所有(2002) 
// Copyright(2002) 
// 编写者: 向世明 
// Author: Xiang Shiming 
 
 
#include "stdafx.h" 
#include "VirtualSphere.h" 
 
////////////////////////////////////////////////////////////////////// 
// Construction/Destruction 
////////////////////////////////////////////////////////////////////// 
 
CVirtualSphere::CVirtualSphere(int nRadius) 
{ 
	m_nRadius = nRadius; 
	if(m_nRadius < 1) m_nRadius = 1; 
	m_byRed = 192; 
	m_byGreen = 192; 
	m_byBlue = 192; 
 
	m_nDifPrecision = 8; 
	m_nSpePrecision = 4; 
 
} 
 
CVirtualSphere::~CVirtualSphere() 
{ 
 
} 
 
//设置虚拟球的主体颜色 
void CVirtualSphere::SetColor(BYTE byRed, BYTE byGreen, BYTE byBlue) 
{ 
	m_byRed = byRed; 
	m_byGreen = byGreen; 
	m_byBlue = byBlue; 
} 
 
//设置扩散区域和高光区域的逼近精度 
//nDifPrecision-----漫反射区域绘制次数 
//nSpePrecision-----高光区域绘制次数 
//二者可以决定漫反射区域和高光区域所占有的比例 
void CVirtualSphere::SetPrecision(int nDifPrecision, int nSpePrecision) 
{ 
	m_nDifPrecision = nDifPrecision; 
	m_nSpePrecision = nSpePrecision; 
	if(m_nDifPrecision < 1) m_nDifPrecision = 1; 
	if(m_nSpePrecision < 1) m_nDifPrecision = 1; 
} 
 
//绘制 
//(x,y)------左上角位置 
void CVirtualSphere::Draw(CDC* pDC, int x ,int y) 
{ 
	pDC->SelectStockObject(NULL_PEN); 
	//漫反射光逼近次数 
	int nDifTimes = min(m_nDifPrecision, m_nRadius); 
	 
	//分母 
	int nDenominator = (7 * nDifTimes); 
 
	//绘制漫反射区域 
	for(int i = 0; i < nDifTimes; i++) 
	{ 
		//颜色 
		BYTE byRed = (BYTE)((i * m_byRed * 4) / nDenominator + 3 * (int)m_byRed / 7); 
		BYTE byGreen = (BYTE)((i * m_byGreen * 4) / nDenominator + 3 * (int)m_byGreen / 7); 
		BYTE byBlue = (BYTE)((i * m_byBlue * 4) / nDenominator + 3 * (int)m_byBlue / 7); 
 
		//画刷 
		CBrush brush; 
		brush.CreateSolidBrush(RGB(byRed, byGreen, byBlue)); 
		CBrush* pOldBrush = pDC->SelectObject(&brush); 
		 
		//左上角坐标 
		int xLT = x + i; 
		int yLT = y + (i * 2) / 5; 
		 
		//大小 
		int nSize = m_nRadius - (5 * i) / 4 + 1; 
 
		//右下角坐标 
		int xRB = xLT + nSize; 
		int yRB = yLT + nSize; 
 
 
		//绘制 
		pDC->Ellipse(xLT, yLT, xRB, yRB); 
		 
		pDC->SelectObject(pOldBrush); 
		brush.DeleteObject(); 
	} 
 
	//绘制高光区域 
	 
	//高光逼近次数 
	int nSpeTimes = min(m_nSpePrecision, (m_nRadius - nDifTimes)); 
	if(nSpeTimes < 1) return; 
	 
	//暂时变量,分母 
	nDenominator = (2 * nSpeTimes); 
 
	 
	//绘制高光区域 
	for(i = 0; i < nSpeTimes; i++) 
	{ 
		int nIndex = i + nDifTimes; 
		//颜色 
		BYTE byRed = (BYTE)(m_byRed + ((255 - m_byRed) * i) / nDenominator); 
		BYTE byGreen = (BYTE)(m_byGreen + ((255 - m_byGreen) * i) / nDenominator); 
		BYTE byBlue = (BYTE)(m_byBlue + ((255 - m_byBlue) * i) / nDenominator); 
 
		//画刷 
		CBrush brush; 
		brush.CreateSolidBrush(RGB(byRed, byGreen, byBlue)); 
		CBrush* pOldBrush = pDC->SelectObject(&brush); 
		 
		//左上角坐标 
		int xLT = x + nIndex; 
		int yLT = y + (nIndex * 2) / 5; 
		 
		//大小 
		int nSize = m_nRadius - (5 * nIndex) / 4 + 1; 
 
		int xRB = xLT + nSize; 
		int yRB = yLT + nSize; 
 
 
		//绘制 
		pDC->Ellipse(xLT, yLT, xRB, yRB); 
		 
		pDC->SelectObject(pOldBrush); 
		brush.DeleteObject(); 
	} 
 
}