prj/tech/libsrc/r3d/xform.h

   1 // $Header: x:/prj/tech/libsrc/r3d/RCS/xform.h 1.9 1998/06/18 11:27:29 JAEMZ Exp $
   2 // Transform and projection definitions
   3
   4 #ifndef __XFORM_H
   5 #define __XFORM_H
   6
   7 #include <ctxts.h>
   8
   9
  10 // define to dereference global f pointer
  11 #define R3_XFORM(x) (*((r3d_glob.xform_tab).x))
  12
  13 // The basic set of transformers and projectors are as follows.  The
  14 // project class of functions just projects, stuffing the sx,sy, and w
  15 // values into the 2d part of the point.  The rotate class of functions
  16 // just
  17
  18 // some of these will be function pointers
  19 EXTERN void r3_transform_block(int n,r3s_point dst[],mxs_vector src[]);
  20 #define r3_rotate_block(n,dst,src) (R3_XFORM(rotate_block)((n),(dst),(src)))
  21 #define r3_project_block(n,p) (R3_XFORM(project_block)((n),(p)))
  22 #define r3_transform_block_func R3_XFORM(transform_block)
  23
  24 EXTERN void r3_transform_list(int n,r3s_phandle dst[],mxs_vector *src[]);
  25 EXTERN void r3_rotate_list(int n,r3s_phandle dst[],mxs_vector *src[]);
  26 EXTERN void r3_project_list(int n,r3s_phandle p[]);
  27
  28 #define r3_transform_point(dst,src) r3_transform_block(1,(dst),(src))
  29 #define r3_rotate_point(dst,src) (R3_XFORM(rotate_block)(1,(dst),(src)))
  30 #define r3_project_point(p) (R3_XFORM(project_block)(1,(p)))
  31
  32 // This is the preferred model, especially since every tile renderer is
  33 // fixed anyway it gets you the delta to add to your transformed points.
  34 // It stuffs the delta into dst.
  35
  36 EXTERN void r3_get_delta(mxs_vector *dst,mxs_vector *src);
  37 EXTERN void r3_copy_add_delta(r3s_point *dst,r3s_point *src,mxs_vector *delta);
  38
  39
  40
  41 #endif // XFORM