--{{{  registers
// void safe_binitize ( int    macro_lo, int    macro_hi,
//                      float  fminx,    float  fminy,
//                      float  fmaxx,    float  fmaxy,
//                      int    screen_bins_x )
//
//
// draw an unclipped pmesh....
//
// void draw_geom ( int *icoeff_pp,
//                  int *icoeff_basep,
//                  dpl_CONNECTION *connection,
//                  int draw_mode,
//                  int backwards,
//                  int opacity,
//                  float material )

#define iparam1    r16
#define iparam2    r17
#define iparam3    r18
#define iparam4    r19
#define iparam5    r20
#define iparam6    r21

#define rcoeff_pp     r4
#define rcoeff_basep  r5
#define connection    r6
#define draw_mode     r7
#define backwards     r8

#define rcoeffptr     r9
#define rcoeffbase    r10
#define tri_coeffbase r11

#define rv1           r12
#define rv2           r13
#define rv3           r14

#define vert0_ref     r15
#define vertex_ref    r19
#define pvertex_ref   r20
#define n_verts       r21
#define opacity       r22

#define egde_opcode   backwards

#define itemp1        r25
#define itemp2        r26
#define itemp3        r27
#define itemp4        r29
#define itemp5        r30

//
// screen-space minimax for binitizing
//
#define fparam1 f8
#define fparam2 f9
#define fparam3 f10
#define fparam4 f11

#define fminx   f8
#define fminy   f9
#define fmaxx   f10
#define fmaxy   f11

#define ftexscale f2
#define fmaterial f3

// x, y coords for tris/quads

#define fx0    f4
#define fy0    f5
#define fx1    f6
#define fy1    f7
#define fx2    f12
#define fy2    f13
#define fdx1   f14
#define fdy1   f15
#define fdx2   f16
#define fdy2   f17

#define fr0    f18
#define fg0    f19
#define fb0    f20
#define fminz  f21

#define fr1    f22
#define fg1    f23
#define fb1    f24
#define fC     f25

#define fr2    f26
#define fg2    f27
#define fb2    f28

#define fA     f29
#define fB     f30
#define ftmp   f31

--}}}  
--{{{  declare offsets in VERTEX structure

//
// Note new placement of next field - ensures double-alignment of
// position, normal and texcoords
//
//        typedef struct s_rvert {
//  0       dpl_POINT position;
// 16       dpl_POINT normcol;
// 32       float32 texcoords [3];
// 44       struct s_rvert *next;
// 48       dpl_POINT xform_posn;
// 64       float32 rendered_color[3];
//          int32 touched;
// 80     } dpl_REMOTE_VERTEX;
//
//        typedef struct s_conn {
//  0       struct s_conn *next;
//  4       int32  n_verts;
//  8       dpl_REMOTE_VERTEX*  indices[6];
// 32       dpl_POINT planeEqn;
// 48       float32 rendered_color[3];
// 60       int32 touched;
//        } dpl_REMOTE_CONNECTION;


#define VERT_position_offs 48
#define VERT_normal_offs   64
#define VERT_tex_offs      32
#define VERT_size          80

#define VERT_x_offs        ((VERT_position_offs) + 0)
#define VERT_y_offs        ((VERT_position_offs) + 4)
#define VERT_z_offs        ((VERT_position_offs) + 8)
#define VERT_w_offs        ((VERT_position_offs) + 12)

#define VERT_r_offs        (VERT_normal_offs)
#define VERT_g_offs       ((VERT_normal_offs)+4)
#define VERT_b_offs       ((VERT_normal_offs)+8)

#define VERT_tex_u_offs   ((VERT_tex_offs)+0)
#define VERT_tex_v_offs   ((VERT_tex_offs)+4)
#define VERT_a_offs       ((VERT_tex_offs)+8)

#define FACET_next_offs     0
#define FACET_nverts_offs   4
#define FACET_vert0_offs    8
#define FACET_plane_offs   32
#define FACET_r_offs       48
#define FACET_g_offs       (48+4)
#define FACET_b_offs       (48+8)
#define FACET_touched_offs 60

--}}}