1 Tutorial: building a telephone

This tutorial will focus on building a sculptured object using curve and surface modelling techniques, boolean operations and rendering techniques. We start by modelling the different parts of our object.

1.1 Curve and surface modelling

telephone base:
- model some 2D section curves by xccurv;
- position these curves in the 3D space loading them with xcsurf (see fig. 1);
  
  Figure 1:
- interpolate by skinning technique using xcsurf (see fig. 2);
  
  Figure 2:
receiver:
- model interactively by xcsurf just half of the whole receiver (see fig. 3a);
- create the second half by duplicating and rotating (see fig. 3b);
  
  (a) (b)
  
  Figure 3:
disk:
- model the profile curve by xccurv (see fig. 4a);
- model the disk by revolution using xcsurf (see fig. 4b);
  
  (a) (b)
  
  Figure 4:
- load a cylinder primitive with xcsurf and locate it with respect to the disk (see fig. 5a);
- duplicate the cylinder and rotate it around the "disk axis" by 36 degree;
- repeat for the other cylinders (see fig. 5b);
  
  (a) (b)
  
  Figure 5:

1.2 Solid modelling

disk:
- compose the primitives disk and cylinder by the boolean operation difference in xcbool (see fig. 6a);
- compose, by the same operation, the resulting object with the other cylinders (see fig. 6b);
  
  (a) (b)
  
  Figure 6:

1.3 Rendering

Once you have created an object, you will want to look at them as a rendered image. This means to describe a virtual scene by defining the background, setting some light sources, defining the material peculiarities of the object, applying eventually a texture and then positioning the camera and setting the view parameters (see fig. 7a, 7b and 8);

(a) (b)

Figure 7:

Figure 8:

This document was translated from L^AT_EX by H^EV^EA.