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Five new projections: Poor Man (hyperbolic only), Panini, retroazimuthal: Craig, Hammer, Littrow (retro-Hammer buggy on sphere)

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Zeno Rogue
2020-10-08 18:22:28 +02:00
parent 34dc8fcc6e
commit b74509c95a
5 changed files with 99 additions and 6 deletions
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70
hypgraph.cpp
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@@ -1074,6 +1074,76 @@ EX void apply_other_model(shiftpoint H_orig, hyperpoint& ret, eModel md) {
}
}
case mdRetroCraig: {
makeband(H_orig, ret, [] (ld& x, ld& y) {
if(x)
y = x / sin_auto(x) * (sin_auto(y) * cos_auto(x) - tan_auto(pconf.loximuthal_parameter) * cos_auto(y));
else
y = sin_auto(y) - tan_auto(pconf.loximuthal_parameter) * cos_auto(y);
});
break;
}
case mdRetroLittrow: {
makeband(H_orig, ret, [] (ld& x, ld& y) {
tie(x, y) = make_pair(
sin_auto(x) / cos_auto(y),
cos_auto(x) * tan_auto(y)
);
});
break;
}
case mdRetroHammer: {
ld d = hdist(H, ypush0(pconf.loximuthal_parameter));
makeband(H_orig, ret, [d,H] (ld& x, ld& y) {
if(x == 0 && y == 0) return;
if(x)
y = x / sin_auto(x) * (sin_auto(y) * cos_auto(x) - tan_auto(pconf.loximuthal_parameter) * cos_auto(y));
else
y = sin_auto(y) - tan_auto(pconf.loximuthal_parameter) * cos_auto(y);
ld scale = d / hypot(x, y);
if(H[2] < 0) scale = -scale;
x *= scale;
y *= scale;
});
break;
}
case mdPanini: {
ld proh = sqrt(H[2]*H[2] + curvature() * H[0] * H[0]);
H /= proh;
H /= (H[2] + pconf.alpha);
ret = H;
ret[2] = 0; ret[3] = 1;
break;
}
case mdPoorMan: {
find_zlev(H);
H = space_to_perspective(H);
models::apply_orientation_yz(H[1], H[2]);
models::apply_orientation(H[0], H[1]);
ld u = H[0], v = H[1];
if(abs(u) > 1e-3 && abs(v) > 1e-3) {
ld r2 = u*u+v*v;
ld scale = sqrt((-r2+sqrt(r2*(r2+4*u*u*v*v*(r2-2))))/(2*(r2-2))) / u / v;
if(u*v<0) scale = -scale;
H = scale * H;
}
ret = H;
ret[2] = 0;
ret[3] = 1;
models::apply_orientation(ret[1], ret[0]);
models::apply_orientation_yz(ret[2], ret[1]);
break;
}
case mdGUARD: case mdManual: break;
}