如何用CW3DGraphLib__DCWGraph3DPlot3DCurve 画多条空间曲线？

Question

打算用CVI/labwindows2013 调用cw3dgrph控件，画二条空间线，结果只能成功画一条，有哪位高手用过该指令，指点一下？
在NI官方网站见过类似求助，思路感觉相同，但就是不成功，哪位大牛指点一下？
附NI贴
/* here you draw the first plot /
CW3DGraphLib_CWPlots3DItem (plotsHandle, NULL, CA_VariantInt(1), &plotHandle);
CW3DGraphLib_CWPlot3DSetMultiPlot (plotHandle, NULL, VTRUE);
CW3DGraphLib_CWPlots3DItem (plotsHandle, NULL, CA_VariantInt(2), &plotHandle);
CW3DGraphLib_CWPlot3DSetMultiPlot (plotHandle, NULL, VFALSE);
CW3DGraphLib_CWPlots3DItem (plotsHandle, NULL, CA_VariantInt(3), &plotHandle);
CW3DGraphLib_CWPlot3DSetMultiPlot (plotHandle, NULL, VFALSE);
CW3DGraphLib_CWPlot3DPlot3DSurface (plotHandle, NULL, xArray1, yArray1, dArray1, CA_DEFAULT_VAL);
/ here you draw the second plot /
CW3DGraphLib_CWPlots3DItem (plotsHandle, NULL, CA_VariantInt(1), &plotHandle);
CW3DGraphLib_CWPlot3DSetMultiPlot (plotHandle, NULL, VFALSE);
CW3DGraphLib_CWPlots3DItem (plotsHandle, NULL, CA_VariantInt(2), &plotHandle);
CW3DGraphLib_CWPlot3DSetMultiPlot (plotHandle, NULL, VTRUE);
CW3DGraphLib_CWPlots3DItem (plotsHandle, NULL, CA_VariantInt(3), &plotHandle);
CW3DGraphLib_CWPlot3DSetMultiPlot (plotHandle, NULL, VFALSE);
CW3DGraphLib_CWPlot3DPlot3DSurface (plotHandle, NULL, xArray2, yArray2, dArray2, CA_DEFAULT_VAL);
/ here you draw the first plot */
CW3DGraphLib_CWPlots3DItem (plotsHandle, NULL, CA_VariantInt(1), &plotHandle);
CW3DGraphLib_CWPlot3DSetMultiPlot (plotHandle, NULL, VFALSE);
CW3DGraphLib_CWPlots3DItem (plotsHandle, NULL, CA_VariantInt(2), &plotHandle);
CW3DGraphLib_CWPlot3DSetMultiPlot (plotHandle, NULL, VFALSE);
CW3DGraphLib_CWPlots3DItem (plotsHandle, NULL, CA_VariantInt(3), &plotHandle);
CW3DGraphLib_CWPlot3DSetMultiPlot (plotHandle, NULL, VTRUE);
CW3DGraphLib_CWPlot3DPlot3DSurface (plotHandle, NULL, xArray3, yArray3, dArray3, CA_DEFAULT_VAL);

Answer 1

你可以CAD软件试一试，看看有没有办法？