RGB和CAD颜色索引之间的转换
如何获得程序路径struct resbuf rb;
char sTemp,*str;
ads_getvar("acadprefix",&rb);
strcpy(sTemp,rb.resval.string);
acad_free(rb.resval.rstring);
str=strchr(sTemp,';');
*str='\0';
str=strrchr(sTemp,'\\');
*str='\0';
上段程序中,sTemp中存储了安装CAD的目录
AUTOCAD的系统变量存储了一些与安装有关的信息,虽然不多,在正常情况是够用的.与目录有关的主要有:
dwgprefix 当前dwg图形存储的目录
acadprefix acad环境变量存储的目录
dwgname 当前dwg文件名
savefile 当前自动存储文件名
///从RGB得到cad颜色索引值
int getNearestACI(COLORREF color)
{
long acirgb, r,g,b;
long mindst = 2147483647L;
long dst = 0;
int minndx = 0;
long red=GetRValue(color);
long green=GetGValue(color);
long blue=GetBValue(color);
for ( int i = 1; i < 255; i++ ) {
acirgb = acdbGetRGB ( i );
r =GetRValue(acirgb);
g =GetGValue(acirgb);
b =GetBValue(acirgb);
dst = abs ( r-red) + abs ( g -green) + abs (b-blue);
if ( dst < mindst ) {
minndx = i;
mindst = dst;
}
}
return minndx;
}
//功 能：从CAD的颜色得到RGB
COLORREF CGlobal::GetColorFromIndex(int colorIndex)
{
if(colorIndex < 0 || colorIndex > 255)
{
ads_alert("传入的颜色号不在0~255之间!");
return 0;
}
BYTE R, G, B;
#ifdef ARX_2002_dll
R = lpszRGBData;
G = lpszRGBData;
B = lpszRGBData;
#else
long zhi = acdbGetRGB(colorIndex);
WORD LOW = LOWORD(zhi);
WORD HIG = HIWORD(zhi);
R = LOBYTE(LOW);
G = HIBYTE(LOW);
B = LOBYTE(HIG);
#endif
return RGB(R,G,B);
//return acdbGetRGB(nColor);
}
获取AcDbDimension里的属性信息
AcDbEntity *pEnt;
AcDbObjectId id;
AcGePoint3d ptPick;
ads_name eName;
if (acedEntSel ("Select a dimension: " , eName, asDblArray (ptPick)) != RTNORM )
return;
acdbGetObjectId (id, eName);
acdbOpenAcDbEntity (pEnt, id, AcDb::kForRead);
//----- Get the id of the block table record which owns the text entity
AcDbDimension *pDim =AcDbDimension::cast (pEnt);
if (pDim == NULL)
{
pEnt->close ();
return;
}
id =pDim->dimBlockId ();
pDim->close ();
AcDbBlockTableRecord *pr;
acdbOpenAcDbObject ((AcDbObject *&) pr, id, AcDb::kForRead);
//----- Iterating the block table record
AcDbBlockTableRecordIterator *pi;
pr->newIterator (pi);
while (!pi->done ())
{
pi->getEntity (pEnt, AcDb::kForRead);
if (pEnt->isKindOf (AcDbMText::desc ()))
{
AcDbMText *pt = (AcDbMText *) pEnt;
char *s = pt->contents ();
acutPrintf (s);
delete s;
}
pEnt->close();
pi->step();
}
pr->close();
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