libs/agg/agg_trans_perspective.h

30         double sx, shy, w0, shx, sy, w1, tx, ty, w2;
37             tx (0), ty (0), w2(1) {}
45            tx (v6), ty (v7), w2(v8) {}
51            tx (m[6]), ty (m[7]), w2(m[8]) {}
57            tx (a.tx ), ty (a.ty ), w2(1) {}
245                 den(px * m.w0 + py * m.w1 + m.w2),
303             w2  = 1.0;
316                 sx = shy = w0 = shx = sy = w1 = tx = ty = w2 = 0.0;
331             w2  = 1.0;
339         double d0 = sy  * w2 - w1  * ty;
340         double d1 = w0  * ty - shy * w2;
345             sx = shy = w0 = shx = sy = w1 = tx = ty = w2 = 0.0;
353         shx = d * (a.w1 *a.tx  - a.shx*a.w2);
354         sy  = d * (a.sx *a.w2  - a.w0 *a.tx);
358         w2  = d * (a.sx *a.sy  - a.shy*a.shx);
435         tx  = 0; ty  = 0; w2 = 1;
446         tx  = a.sx *b.tx  + a.shx*b.ty  + a.tx*b.w2;
449         ty  = a.shy*b.tx  + a.sy *b.ty  + a.ty*b.w2;
450         w0  = a.w0 *b.sx  + a.w1 *b.shy + a.w2*b.w0;
451         w1  = a.w0 *b.shx + a.w1 *b.sy  + a.w2*b.w1;
452         w2  = a.w0 *b.tx  + a.w1 *b.ty  + a.w2*b.w2;
463         tx  = a.sx *b.tx  + a.shx*b.ty  + a.tx*b.w2;
466         ty  = a.shy*b.tx  + a.sy *b.ty  + a.ty*b.w2;
477         tx  = a.sx *b.tx  + a.shx*b.ty  + a.tx*b.w2;
480         ty  = a.shy*b.tx  + a.sy *b.ty  + a.ty*b.w2;
481         w0  = a.w0 *b.sx  + a.w1 *b.shy + a.w2*b.w0;
482         w1  = a.w0 *b.shx + a.w1 *b.sy  + a.w2*b.w1;
483         w2  = a.w0 *b.tx  + a.w1 *b.ty  + a.w2*b.w2;
500         w2  = a.w0 *b.tx  + a.w1 *b.ty  + a.w2;
575         double m = 1.0 / (x*w0 + y*w1 + w2);
608         *m++ = tx;  *m++ = ty;  *m++ = w2;
616         tx  = *m++; ty  = *m++; w2 = *m++;
626         tx  = a.tx;  ty  = a.ty;  w2 = 1;
633         return sx  * (sy  * w2 - ty  * w1) +
634                shx * (ty  * w0 - shy * w2) +
647         return std::fabs(sx) > epsilon && std::fabs(sy) > epsilon && std::fabs(w2) > epsilon;
661                is_equal_eps(w2,  1.0, epsilon);
676                is_equal_eps(w2,  m.w2,  epsilon);