! The scene description read by consists of a number of keywords, each followed by a set of arguments. These keywords can ! be thought of as commands that direct to do various things, such as create objects, set the eye's position, and change an object's appearance.
*************** *** 38,52 **** These options override the values given in the input file, and are explained in detail in Appendix A.
! Rayshade is ``case sensitive,'' which means that typing SPHERE or Sphere instead of sphere won't work. ! Rayshade keywords are all lower-case. Many people choose to capitalize the first letter of names that they give to objects or surfaces in order to make then ``stand out'' in an input file.
Keywords, numbers and strings in the input file are separated by spaces, tabs, or new lines (carriage returns). These ``whitespace'' characters ! are handled identically by rayshade, which means that you can separate keywords from keywords, key words from arguments, and arguments from arguments using any combination of whitespace characters that you choose.
— 39,53 —- These options override the values given in the input file, and are explained in detail in Appendix A.
! is ``case sensitive,'' which means that typing SPHERE or Sphere instead of sphere won't work. ! keywords are all lower-case. Many people choose to capitalize the first letter of names that they give to objects or surfaces in order to make then ``stand out'' in an input file.
Keywords, numbers and strings in the input file are separated by spaces, tabs, or new lines (carriage returns). These ``whitespace'' characters ! are handled identically by , which means that you can separate keywords from keywords, key words from arguments, and arguments from arguments using any combination of whitespace characters that you choose.
*************** *** 75,93 **** available for use in expressions, in order of decreasing precedence.
The upshot of all this is that the strings ! 42, 42., ! (20 + 22), and (72 - 7) mean the same thing ! to rayshade.
Variables may also be defined and used in expressions. Several ! built-in functions are also provided. See appendix B for further details.
! will automatically run the input it receives through the C preprocessor if it is available. This allows you to use C preprocessor directives, such as #include, #define, and #ifdef when designing your input files.
! Comments may be included in input files by enclosing
text between the strings /* and */, as in the C
programming
language.
— 76,94 —-
available for use in expressions, in order of decreasing precedence.
The upshot of all this is that the strings
! 42, 42.,
! (20 + 22), and (7^2 - 7) mean the same thing
! to .
Variables may also be defined and used in expressions. Several ! built-in functions are also provided. See Appendix B for further details.
! will automatically run the input it receives through the C preprocessor if it is available. This allows you to use C preprocessor directives, such as #include, #define, and #ifdef when designing your input files.
! Comments may be included in input files by enclosing
text between the strings /* and */, as in the C
programming
language.
***************
*** 94,101 ****