RenderDrive Interface Section 11

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11 - Types

Array types is an extension that is currently supported with restrictions.

There are no l-values. An array element may only be changed by assignment. i.e. setxcomp(pt[0],3) doesn't update pt[0].

Variable sized arrays are not supported.

The spline() call with an array argument is not supported.

There is a syntax problem with the following:

      string tname,tx[2];
      float i=0;
      texture(tx[i][channel]);  /* This won't work */
      texture(tx[i]);           /* This won't work either */
      tname = tx[i];
      texture(tname);           /* This will work */
      texture(tname[channel]);  /* This might work if you're lucky */

Floats

OK.

Colors

Colours may be specified in "rgb", "xyz", "xyY", "YIQ", "hsl", or "hsv" space, using the following construct:

     color space (u,v,w)

Or in the default RGB space:

     color (r,g,b)

Points

The point type is used to represent points and vectors. The vector and normal types are also supported. However no extra checking is provided as a result of their use.

The only time vector must be used instead of point is when specifying vectors in a space. For example the expression specifies a vector in a given space:

      	vector space (x, y, z)

Specifying normals in this way is not currently supported. Instead, use vector, as in the above construct.

11 - Types

Floats

Colors

Points

Strings

Matrices

Uniform and Varying Variables