计算机屏幕是平面二维的，我们之所以能欣赏到真如实物般的三维图像，是因为显示在计算机屏幕上时色彩灰度的不同而使人眼产生视觉上的错觉，而将二维的计算机屏幕感知为三维图像。基于色彩学的有关知识，三维物体边缘的凸出部分一般显高亮度色，而凹下去的部分由于受光线的遮挡而显暗色。这一认识被广泛应用于网页或其他应用中对按钮、3D线条的绘制。对于本文所要绘制的3D文字同样也适用，即在原始位置显示高亮度颜色，而在左下或右上等位置用低亮度颜色勾勒出其轮廓，这样在视觉上便会产生3D文字的效果。具体实现时，可用完全一样的字体在不同的位置分别绘制两个不同颜色的2D文字，只要使两个文字的坐标合适，就完全可以在视觉上产生出不同效果的3D文字。
下面给出两种类似的实现方法并比较两者的效果：
void CMyDrawView::OnDraw(CDC* pDC)
{
CMyDrawDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
// TODO: add draw code for native data here
CRect rect1,rect2;
this->GetClientRect(&rect1);
rect2 = rect1+CPoint(80,80);
this->Draw3DText("欢迎使用",&rect1,44,0,FW_BOLD,0,"楷体_GB2312",pDC);
this->Draw3DText("欢迎使用",&rect2,pDC);
}
void CMyDrawView::Draw3DText(CString str,CRect rectText,int nHeight,int nWidth,int nWeight,BYTE bItalic,LPCTSTR lpszFacename,CDC *pDC)
{//画3D文字
CFont newFont,*oldFont;
COLORREF oldcolor;
newFont.CreateFont(nHeight,nWidth,0,0,nWeight,bItalic,FALSE,FALSE,DEFAULT_CHARSET,OUT_DEFAULT_PRECIS,CLIP_DEFAULT_PRECIS,DEFAULT_QUALITY,
FIXED_PITCH | FF_ROMAN,lpszFacename);//创建新字体
pDC->SetBkMode(TRANSPARENT);
oldFont = pDC->SelectObject(&newFont);//选进DC中
oldcolor = pDC->SetTextColor(RGB(0,0,0));
pDC->DrawText(str,rectText+CPoint(1,1),DT_SINGLELINE | DT_LEFT | DT_VCENTER|DT_CENTER);
pDC->SetTextColor(::GetSysColor(COLOR_BTNFACE));
pDC->DrawText(str,rectText,DT_SINGLELINE | DT_LEFT | DT_VCENTER|DT_CENTER);
pDC->SetTextColor(oldcolor);
pDC->SelectObject(oldFont);
}
void CMyDrawView::Draw3DText(CString str,CRect rect,CDC *pDC)
{
CFont newFont,*oldFont;
COLORREF oldColor;
LOGFONT f;
f.lfCharSet = DEFAULT_CHARSET;
f.lfClipPrecision = CLIP_DEFAULT_PRECIS;
f.lfEscapement = 0;
f.lfHeight = 44;
f.lfItalic = 0;
f.lfOrientation = 0;
f.lfOutPrecision = OUT_DEFAULT_PRECIS;
f.lfPitchAndFamily = FIXED_PITCH | FF_ROMAN;
f.lfQuality = DEFAULT_QUALITY;
f.lfStrikeOut = FALSE;
f.lfUnderline = FALSE;
f.lfWeight = FW_BOLD;
f.lfWidth = 0;
strcpy(f.lfFaceName,"楷体_GB2312");
newFont.CreateFontIndirect(&f);
oldColor = pDC->SetTextColor(RGB(0,0,0));
oldFont = (CFont*)pDC->SelectObject(&newFont);
pDC->SetBkMode(TRANSPARENT);
pDC->SetTextColor(::GetSysColor(COLOR_3DDKSHADOW));
pDC->DrawText(str,rect,DT_SINGLELINE | DT_LEFT | DT_VCENTER|DT_CENTER);
pDC->SetTextColor(::GetSysColor(COLOR_3DHILIGHT));
pDC->DrawText(str,rect+CPoint(1,1),DT_SINGLELINE | DT_LEFT | DT_VCENTER|DT_CENTER);
pDC->SelectObject(oldFont);
pDC->SetTextColor(oldColor);
}
对比效果如图所示：
本文转自Phinecos(洞庭散人)博客园博客，原文链接：http://www.cnblogs.com/phinecos/archive/2007/07/16/820402.html，如需转载请自行联系原作者
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