【ABD CE 二次开发 C++】麻烦老师帮忙看段代码

老师，v8i的代码如下。我没看到太懂，这个是不是就是求点？可不可以用如下代码去获取所有点？

int ptCount = mdlLinear_getPointCount(eeh.GetElementCP());
assert(ptCount > 0);
linearPts.resize(ptCount);
mdlLinear_extract(&linearPts[0], &ptCount, eeh.GetElementCP(), eeh.GetModelRef()); // 提取所有点

EmbeddedDPoint3dArray *pArray = jmdlEmbeddedDPoint3dArray_grab();

			mdlElmdscr_extractCompositeLinear(pArray, edP, edP->h.dgnModelRef, FALSE, TRUE);

			vector<DPoint3d> pts;
			int count = jmdlEmbeddedDPoint3dArray_getCount(pArray);
			for (int i = 0; i < count; ++i)
			{
				DPoint3d pt;
				jmdlEmbeddedDPoint3dArray_getDPoint3d(pArray, &pt, i);

				//DPoint3d stPt = { 0, 0, 0 };
				//drawALine(stPt, pt);
				pts.push_back(pt);
			}

			// 首尾两个点不能相同
			if (pts.size() >= 2
				&& mdlVec_pointEqual(&pts.front(), &pts.back()) == TRUE)
			{
				pts.pop_back();
			}

			copy(pts.begin(), pts.end(), back_inserter(handlePoints));

			jmdlEmbeddedDPoint3dArray_drop(pArray);