... 121frames in CGfxOpenGL class, 27frustum culling, 241 – 247 application of, 245 – 247 determining view frustum, 243 – 244 plane equations for, 243 – 244 points, testing, 244 spheres, testing, 244 – 245 frustums. ... 7swimming, 166TTarga files, 143 – 147 format for, 143 – 145 header information, 144 image origin, 145 loading, 145 – 147 types of, 144 Index30817 BOGL_GP INDEX 3/1/ 04 2:16 PM Page 308TLFeBOOKOn ... points, 44 distance and, 45 example of code, 46 49 frustum culling, testing points in, 244 modifying point size, 43 parameters for, 45 3D, drawing points in, 42 47 polygon winding, 54 polygons....