Drawing line lists using ID3DXLine

Drawing line lists using ID3DXLine

• Lakshminarayana

  I already tried this...
  
  ///////////////////////////////
  for (int i=0; i<m_dwVertCount; i+=2)
  {
  D3DXVECTOR2 line[2] = { m_lineVertices[ i ], m_lineVertices[i+1] };
  m_pLine->Draw(line, 2, color);
  }
   /////////////////////////////
  
  instead of
  m_pLine->Draw(m_lineVertices, m_dwVertCount, color);
  
  but the result is not correct. Actually i m drawing a shape from the vertices. using simply the second appraoch, the shape is drawn correctly but with some additional lines joining other line segments. The loop approach above i used does not draws the whole shape, only some parts. Am i doing it wrong Any idea plz
  
  Thanks
  

• gon2024

  Unfortunately, it doesn't draw line lists directly. Only strips. However, I'm quite sure it does some sort of internal batching for maximizing effeciency. That is, just loop on ID3DXLine::Draw() with your line segments and they should be batched internally.
  It's not the best thing for performance of course, but I think this should work fairly well with small numbers of lines (i.e. hundreds).
  
  
• Drawing line lists using ID3DXLine