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) {}
249                 nom_y(px * m.shy + py * m.sy + m.ty),
302             ty  = q[1];
316                 sx = shy = w0 = shx = sy = w1 = tx = ty = w2 = 0.0;
330             ty  = q[1];
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;
356         tx  = d * (a.shx*a.ty  - a.sy *a.tx);
357         ty  = d * (a.shy*a.tx  - a.sx *a.ty);
435         tx  = 0; ty  = 0; w2 = 1;
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;
448         sy  = a.shy*b.shx + a.sy *b.sy  + a.ty*b.w1;
449         ty  = a.shy*b.tx  + a.sy *b.ty  + a.ty*b.w2;
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;
464         shy = a.shy*b.sx  + a.sy *b.shy + a.ty*b.w0;
465         sy  = a.shy*b.shx + a.sy *b.sy  + a.ty*b.w1;
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;
478         shy = a.shy*b.sx  + a.sy *b.shy + a.ty*b.w0;
479         sy  = a.shy*b.shx + a.sy *b.sy  + a.ty*b.w1;
480         ty  = a.shy*b.tx  + a.sy *b.ty  + a.ty*b.w2;
483         w2  = a.w0 *b.tx  + a.w1 *b.ty  + a.w2*b.w2;
494         tx  = a.sx *b.tx  + a.shx*b.ty  + a.tx;
497         ty  = a.shy*b.tx  + a.sy *b.ty  + a.ty;
500         w2  = a.w0 *b.tx  + a.w1 *b.ty  + a.w2;
545         ty += y;
577         *py = m * (x*shy + y*sy  + ty);
585         *y = tmp * shy + *y * sy  + ty;
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) +
660                is_equal_eps(ty,  0.0, epsilon) &&
675                is_equal_eps(ty,  m.ty,  epsilon) &&
703         *dy = ty;