Lines Matching refs:zi
43 float sdivz, tdivz, zi, z, du, dv, spancountminus1;
76 zi = d_ziorigin + dv*d_zistepv + du*d_zistepu;
77 z = (float)0x10000 / zi; // prescale to 16.16 fixed-point
79 izi = (int)(zi * 0x8000 * 0x10000);
105 // calculate s/z, t/z, zi->fixed s and t at far end of span,
109 zi += zi8stepu;
110 z = (float)0x10000 / zi; // prescale to 16.16 fixed-point
131 // calculate s/z, t/z, zi->fixed s and t at last pixel in span (so
138 zi += d_zistepu * spancountminus1;
139 z = (float)0x10000 / zi; // prescale to 16.16 fixed-point
