<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><P>Hi. I need to render some vectors in 3D space and I've decided to draw them as lines. However my code doesn't seem to work (I see nothing). Does anyone know why ?</P><P></P><P>vtkCellArray *cellArrayNorm = vtkCellArray::New();<BR>vtkPoints *points2 = vtkPoints::New();<BR>points2->Allocate(2*m_NumOfVertices*3*sizeof(float));<BR><BR></P><P>for(int k=0; k<m_NumOfVertices; k++)<BR></P> {<BR> float* fp = VerticesP[k].coords; // Get vertex coords.<BR><P> float* fpN = NormP[k].coords; // Get vertex normal.<BR></P> points2->SetPoint(k, fp); // Set 1st point<BR> points2->SetPoint(m_NumOfVertices + k, // Set 2nd point.<BR> fp[0]+fpN[0], // x+dx<BR> fp[1]+fpN[1], // y+dy<BR> fp[2]+fpN[2]);// z+dz<BR> // Set up new (line) cell and insert.<BR> int pts[2] = {k, m_NumOfVertices+k};<BR>
cellArrayNorm->InsertNextCell(2, pts);<BR> }<BR><P><BR></P><P> vtkPolyData *polyDataNorm = vtkPolyData::New();<BR> polyDataNorm->SetPoints(points2);<BR> polyDataNorm->SetPolys(cellArrayNorm);<BR><BR> vtkPolyDataMapper *polyDataMapperNorm = vtkPolyDataMapper::New();<BR> polyDataMapperNorm->SetInput(polyDataNorm);<BR><BR> ActorNorm->SetMapper(polyDataMapperNorm);<BR> ren1->AddActor(ActorNorm);<BR><BR> vtkProperty *prop = vtkProperty::New();<BR> prop->SetColor(1.0, 0.0, 0.0);<BR> ActorNorm->SetProperty(prop);<BR><BR> points2->Delete();<BR> cellArrayNorm->Delete();<BR> polyDataNorm->Delete();<BR> polyDataMapperNorm->Delete();<BR> prop->Delete();<BR><BR></P><P></P><P>Thanks.</P><P></P></td></tr></table><br>
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