EXAMPLE Of USE OF
DRAWING ASSISTS BY COMPUTER (CAD)
FOR MARQUETRY

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In the example which follows, a scannée draft is used as a basis for construction of the drawing.

• That helps with the construction of the basic layout. One sees here a copy used for the source (copies 1) and a second constitutes the realization of the bottom (copies 2).
  
  
• To draw an object, a "precise cutting" of a first object is enough, because the drawing of the second object which is adjacent for him makes by positioning of the second object "below" the first: example here the trees pass below the sky, therefore it is not necessary to take again the contour of the first part.
  
  
• Then, various copies are produced to draw each plan. That allows in particular a simple adaptation of the scale of each object, its positioning, its reproduction to identical...
  
  
  
  
  
• It is possible to visualize only certain copies, like making safe them to avoid involuntary modifications. These copies must be laid out in the order of the plans, and one can make them transparent or opaque.
  
  
• In the image above, one also sees the possibility of importation of an image adjusted in the face and which will help with the drawing of one of the plans.
  
  
  
  
  
• The curves are carried out using "curves of Bezier", which make it possible to draw all kinds of right-hand sides, curves, sinusoids... with its own way, and which it is possible to improve then: according to the tool used, concepts of points of anchoring, hot lines, points of inflection... are of primary importance. The principle is quite above illustrated by Andre-François CHASSIN.
  
  
  
  
  
• Lastly, by anticipation of the choice of the gasolines of platings, the colour application of the reason allows a choice of the colors of wood, and to better envisage contrasts, the depth of the final table...
  
  
  

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