Advanced Linux 3D Graphics by Norman Lin

By Norman Lin

This moment colume presents programmers who're skilled in either Linux and primary 3D pictures thoughts with a well-rounded perpesctive on 3D thought and perform in the context of programming better interactive 3D purposes

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N binutils: A collective term for the GNU binary utilities. Use these tools to find out information about system libraries and object files. This can help in finding out which library file contains a particular function with which you need to link your program. n find: A powerful file-finding program. Use “find” to look for files (such as C++ header files) containing a particular string or matching some criteria. Linux 3D Modeling The introductory companion book Linux 3D Graphics Programming covered basic usage of the Blender 3D modeling package for creating 3D models.

Ifloor returns the integer floor of (the largest integer smaller than) an l3d_real. The function l3d_sqrt returns an l3d_real representing the square root of the given l3d_real argument. NOTE The reasons for not making l3d_real a class are discussed in the Appendix of the introductory companion book, Linux 3D Graphics Programming. If we choose to use floating-point math (at compile time via a #define), then the l3d_real macros do nothing other than call the ordinary cast, multiplication, or division operators.

The class l3d_coordinate represents a transformable coordinate location in space. It stores two variables of type l3d_point, named original and transformed. The transformed coordinate is always initialized to equal the original coordinate at the beginning of each frame (method reset), after which it may be transformed by zero or more transformations (method transform). After any number of transformations, the application may choose to save the current location in one of the intermediate storage locations (member transformed_ intermediates), so that the old location may be referenced later.

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