32/64-Bit 80x86 Assembly Language Architecture

Appendix A. Data Structure Definitions

When dealing with three-dimensional transformation, data structures are needed to contain the data type. The data structures listed here are discussed in terms of this book.

Integer 2D Point

This is mostly used within a 2D game but has uses within a 3D game. It is used for specifying a starting point within a bitmap image with the origin {0,0} located in the upper-left corner. This is primarily used as the starting point of a texture within a bitmap image. It is also used in relationship to the anchor point of a font baseline so as where to position it within an image or two-triangle quad polygon tile.

  typedef struct iPosType
  {
    int    x;
    int    y;
  } iPos;

Integer 2D Size

Normally bitmaps range from 0 to w-1 for width ...