在利用IAreaFillPropertiesEdit进行图案填充的时候，哪个方法可以进行图案填充定义及填充图案选择呢？
查找了PatternParams Struct当中的方法，好像没有找到对应函数。
Auto CAD中的填充图案能否一并选择来使用？
IAreaFillPropertiesEdit下的AddPattern就是用来给一个EditElementHandle添加图案化的。具体图案化的参数由PatternParams和DwgHatchDefLine两个类来确定。后者就是你说的利用ACAD中的填充图案。
大致编程步骤如下：
PatternParamsPtr pPatParams = PatternParams::Create ();
pPatParams->SetXXX(); 设置图案化的各种参数，如SetCellName指定图案化单元
正确设置pPatParams->modifiers
IAreaFillPropertiesEdit* areaObj = dynamic_cast <IAreaFillPropertiesEdit*> (&eeh.GetHandler (MISSING_HANDLER_PERMISSION_ChangeAttrib));
areaObj->AddPattern (eeh, *pPatParams, NULL);
符工，您好。根据您的解答以及SDK中ElementsExample的介绍，我认为PatternParamsd的SetXXX()函数应该是自定义图案进行填充操作，如果我需要的填充图案不能参数化表达，或者说我仅仅是从.pat文件中选取某个图案进行填充操作，是否有对应函数实现？
PAT文件中保存的是DWG格式的图案化方案，它由如下信息组成：
*图案化名称
后跟一到多行的如下信息：
angle, x-origin, y-origin, delta-x, delta-y, [dash-1, dash-2, ...]
而AddPattern函数的第三个参数DwgHatchDefLineP恰恰就是表达的这个信息。请看函数说明如下：
所以，你可以用代码打开相应的PAT文件，找到对应的Pattern名称，然后将其下的每一行读入为一个DwgHatchDefLine结构，保存在一个bvector<DwgHatchDefLine>中，然后设置params.GetDwgHatchDef().nDefLines为该Pattern中数据的行数。这样调用AddPattern就可以了。
看看DwgHatchDefLine结构，是否正好和上面描述的PAT结构一致？
typedef struct dwgHatchDefLine { double angle; DPoint2d through; DPoint2d offset; short nDashes; double dashes[MAX_DWG_HATCH_LINE_DASHES]; } DwgHatchDefLine;
最简单的办法是，先手工制作这样一个Pattern，然后调用GetPattern方法返回一个bvector<DwgHatchDefLine>查看其内容。
Answer Verified By: lihui He
感谢符工详细的解答。过程中发现一个问题，pat文件中DWG图案AR-CONC结构值见上图，利用GetPattern方法返回的结构值见下图，二者在offset存在区别，不一致，是否有问题？
另外，代码部分基本完成，但仍没有正确填充，我将代码贴上，烦请符工再给看看是什么问题？
ElementId elemId = 114979; EditElementHandle eeh(elemId, ISessionMgr::GetActiveDgnModelP()); IAreaFillPropertiesEdit * fillEditP = dynamic_cast<IAreaFillPropertiesEdit *>(&eeh.GetHandler()); if (NULL == fillEditP) return; fillEditP->SetAreaType(eeh, false); PatternParamsPtr params = PatternParams::Create(); params->SetModifiers(PatternParamsModifierFlags::DwgHatchDef); bvector<DwgHatchDefLine>hatchDefLine; DwgHatchDefLine hatchDefLineBase; hatchDefLineBase.angle = 0.872665; hatchDefLineBase.through = { 0.0, 0.0 }; hatchDefLineBase.offset = { 7.172602, -0.627521 }; hatchDefLineBase.nDashes = 2; hatchDefLineBase.dashes[0] = 0.75; hatchDefLineBase.dashes[1] = -8.25; hatchDefLine.push_back(hatchDefLineBase); hatchDefLineBase.angle = 6.195919; hatchDefLineBase.through = { 0.0, 0.0 }; hatchDefLineBase.offset = { -1.387513, 7.521921 }; hatchDefLineBase.nDashes = 2; hatchDefLineBase.dashes[0] = 0.60; hatchDefLineBase.dashes[1] = -6.6; hatchDefLine.push_back(hatchDefLineBase); hatchDefLineBase.angle = 1.753208; hatchDefLineBase.through = { 0.597717, -0.052293 }; hatchDefLineBase.offset = { 5.785088 , 6.894400 }; hatchDefLineBase.nDashes = 2; hatchDefLineBase.dashes[0] = 0.637402; hatchDefLineBase.dashes[1] = -7.011421; hatchDefLine.push_back(hatchDefLineBase); hatchDefLineBase.angle = 0.806066; hatchDefLineBase.through = { 0.0, 2.0 }; hatchDefLineBase.offset = { 10.672413, -1.655193 }; hatchDefLineBase.nDashes = 2; hatchDefLineBase.dashes[0] = 1.125; hatchDefLineBase.dashes[1] = -12.375; hatchDefLine.push_back(hatchDefLineBase); hatchDefLineBase.angle = 1.686610; hatchDefLineBase.through = { 0.889367, 1.862067 }; hatchDefLineBase.offset = { 9.346619, 9.741186 }; hatchDefLineBase.nDashes = 2; hatchDefLineBase.dashes[0] = 0.956103; hatchDefLineBase.dashes[1] = -10.517138; hatchDefLine.push_back(hatchDefLineBase); hatchDefLineBase.angle = 6.129320; hatchDefLineBase.through = { 0.0, 2.0 }; hatchDefLineBase.offset = { 9.346619, 9.741186 }; hatchDefLineBase.nDashes = 2; hatchDefLineBase.dashes[0] = 0.9; hatchDefLineBase.dashes[1] = -9.9; hatchDefLine.push_back(hatchDefLineBase); hatchDefLineBase.angle = 0.366519; hatchDefLineBase.through = { 1.0, 1.5 }; hatchDefLineBase.offset = { 5.969071, -4.026189 }; hatchDefLineBase.nDashes = 2; hatchDefLineBase.dashes[0] = 0.75; hatchDefLineBase.dashes[1] = -8.25; hatchDefLine.push_back(hatchDefLineBase); hatchDefLineBase.angle = 5.689773; hatchDefLineBase.through = { 1.0, 1.5 }; hatchDefLineBase.offset = { 2.433153, 7.251500 }; hatchDefLineBase.nDashes = 2; hatchDefLineBase.dashes[0] = 0.60; hatchDefLineBase.dashes[1] = -6.6; hatchDefLine.push_back(hatchDefLineBase); hatchDefLineBase.angle = 1.247063; hatchDefLineBase.through = { 1.497423, 1.164484 }; hatchDefLineBase.offset = { 8.402224, 3.225312 }; hatchDefLineBase.nDashes = 2; hatchDefLineBase.dashes[0] = 0.637402; hatchDefLineBase.dashes[1] = -7.011421; hatchDefLine.push_back(hatchDefLineBase); hatchDefLineBase.angle = 0.654498; hatchDefLineBase.through = { 0.0, 0.0 }; hatchDefLineBase.offset = { 0.121599, 3.328939 }; hatchDefLineBase.nDashes = 6; hatchDefLineBase.dashes[0] = 0.0; hatchDefLineBase.dashes[1] = -6.52; hatchDefLineBase.dashes[2] = 0.0; hatchDefLineBase.dashes[3] = -6.7; hatchDefLineBase.dashes[4] = 0.0; hatchDefLineBase.dashes[5] = -6.625; hatchDefLine.push_back(hatchDefLineBase); hatchDefLineBase.angle = 0.1309; hatchDefLineBase.through = { 0.0, 0.0 }; hatchDefLineBase.offset = { 2.630695, 3.944117 }; hatchDefLineBase.nDashes = 6; hatchDefLineBase.dashes[0] = 0.0; hatchDefLineBase.dashes[1] = -3.82; hatchDefLineBase.dashes[2] = 0.0; hatchDefLineBase.dashes[3] = -6.37; hatchDefLineBase.dashes[4] = 0.0; hatchDefLineBase.dashes[5] = -2.525; hatchDefLine.push_back(hatchDefLineBase); hatchDefLineBase.angle = -0.567232; hatchDefLineBase.through = { -2.23, 0.0 }; hatchDefLineBase.offset = { 5.338224, -0.225549 }; hatchDefLineBase.nDashes = 6; hatchDefLineBase.dashes[0] = 0.0; hatchDefLineBase.dashes[1] = -2.5; hatchDefLineBase.dashes[2] = 0.0; hatchDefLineBase.dashes[3] = -7.8; hatchDefLineBase.dashes[4] = 0.0; hatchDefLineBase.dashes[5] = -10.35; hatchDefLine.push_back(hatchDefLineBase); hatchDefLineBase.angle = -0.741765; hatchDefLineBase.through = { -3.23, 0.0 }; hatchDefLineBase.offset = { 5.831862, 1.00105 }; hatchDefLineBase.nDashes = 6; hatchDefLineBase.dashes[0] = 0; hatchDefLineBase.dashes[1] = -3.25; hatchDefLineBase.dashes[2] = 0; hatchDefLineBase.dashes[3] = -5.18; hatchDefLineBase.dashes[4] = 0; hatchDefLineBase.dashes[5] = -7.35; hatchDefLine.push_back(hatchDefLineBase); DwgHatchDef dwgHatchDef = params->GetDwgHatchDef(); dwgHatchDef.nDefLines = 13; ElementRefP oldRef = eeh.GetElementRef(); fillEditP->AddPattern(eeh, *params, &hatchDefLine[0]); eeh.ReplaceInModel(oldRef);
offset值需要再乘以g_1mu吗？直接用GetPattern得到的PatternParams和DwgHatchDefLine对另外一个未做图案化的eeh执行AddPattern看是否正确？
其实offset这个值是否需要转换没有想的很清楚。符工，我后来重新从头看了一下，应该是找到原因了。在设置Pattern中数据行数的时候，起初我是用了GetDwgHatchDef()方法进行设置，但这个应是错误的，后来先设置好DwgHatchDef，然后利用SetDwgHatchDef()方法实现了正确填充。应该是这个原因吧。