libs/agg/agg_trans_perspective.h

30         double sx, shy, w0, shx, sy, w1, tx, ty, w2;
35             sx (1), shy(0), w0(0),
43            sx (v0), shy(v1), w0(v2),
49            sx (m[0]), shy(m[1]), w0(m[2]),
55            sx (a.sx ), shy(a.shy), w0(0),
247                 nom_x(px * m.sx + py * m.shx + m.tx),
248                 nom_x_step(step * m.sx),
295             sx  = q[2] - q[0];
316                 sx = shy = w0 = shx = sy = w1 = tx = ty = w2 = 0.0;
323             sx  = q[2] - q[0] + u * q[2];
342         double d  = sx  * d0 + shx * d1 + tx * d2;
345             sx = shy = w0 = shx = sy = w1 = tx = ty = w2 = 0.0;
350         sx  = d * d0;
354         sy  = d * (a.sx *a.w2  - a.w0 *a.tx);
355         w1  = d * (a.w0 *a.shx - a.sx *a.w1);
357         ty  = d * (a.shy*a.tx  - a.sx *a.ty);
358         w2  = d * (a.sx *a.sy  - a.shy*a.shx);
433         sx  = 1; shy = 0; w0 = 0;
444         sx  = a.sx *b.sx  + a.shx*b.shy + a.tx*b.w0;
445         shx = a.sx *b.shx + a.shx*b.sy  + a.tx*b.w1;
446         tx  = a.sx *b.tx  + a.shx*b.ty  + a.tx*b.w2;
447         shy = a.shy*b.sx  + a.sy *b.shy + a.ty*b.w0;
450         w0  = a.w0 *b.sx  + a.w1 *b.shy + a.w2*b.w0;
461         sx  = a.sx *b.sx  + a.shx*b.shy + a.tx*b.w0;
462         shx = a.sx *b.shx + a.shx*b.sy  + a.tx*b.w1;
463         tx  = a.sx *b.tx  + a.shx*b.ty  + a.tx*b.w2;
464         shy = a.shy*b.sx  + a.sy *b.shy + a.ty*b.w0;
475         sx  = a.sx *b.sx  + a.shx*b.shy + a.tx*b.w0;
476         shx = a.sx *b.shx + a.shx*b.sy  + a.tx*b.w1;
477         tx  = a.sx *b.tx  + a.shx*b.ty  + a.tx*b.w2;
478         shy = a.shy*b.sx  + a.sy *b.shy + a.ty*b.w0;
481         w0  = a.w0 *b.sx  + a.w1 *b.shy + a.w2*b.w0;
492         sx  = a.sx *b.sx  + a.shx*b.shy;
493         shx = a.sx *b.shx + a.shx*b.sy;
494         tx  = a.sx *b.tx  + a.shx*b.ty  + a.tx;
495         shy = a.shy*b.sx  + a.sy *b.shy;
498         w0  = a.w0 *b.sx  + a.w1 *b.shy;
576         *px = m * (x*sx  + y*shx + tx);
584         *x = tmp * sx  + *y * shx + tx;
592         *x = tmp * sx  + *y * shx;
606         *m++ = sx;  *m++ = shy; *m++ = w0;
614         sx  = *m++; shy = *m++; w0 = *m++;
624         sx  = a.sx;  shy = a.shy; w0 = 0;
633         return sx  * (sy  * w2 - ty  * w1) +
647         return std::fabs(sx) > epsilon && std::fabs(sy) > epsilon && std::fabs(w2) > epsilon;
653         return is_equal_eps(sx,  1.0, epsilon) &&
668         return is_equal_eps(sx,  m.sx,  epsilon) &&
682         double x = 0.707106781 * sx  + 0.707106781 * shx;
724         *x = std::sqrt(sx  * sx  + shx * shx);