Method polymorph

crawl-ref/source/player.cc:7980–8021

}

bool player::polymorph(int dur)
{
    ASSERT(!crawl_state.game_is_arena());

    if (!can_polymorph())
        return false;

    transformation f = transformation::none;

    vector<transformation> forms = {
        transformation::bat,
        transformation::wisp,
    };

    // Don't polymorph the player into something that would require emergency flight.
    if (!feat_dangerous_for_form(transformation::pig, env.grid(you.pos())))
        forms.emplace_back(transformation::pig);
    if (!feat_dangerous_for_form(transformation::tree, env.grid(you.pos())))
        forms.emplace_back(transformation::tree);
    if (!feat_dangerous_for_form(transformation::fungus, env.grid(you.pos())))
        forms.emplace_back(transformation::fungus);

    for (int tries = 0; tries < 3; tries++)
    {
        f = forms[random2(forms.size())];

        // need to do a dry run first, as Zin's protection has a random factor
        if (cant_transform_reason(f, true).empty())
            break;

        f = transformation::none;
    }

    if (f != transformation::none && transform(dur, f, true))
    {
        stop_delay(true, true);

        transform_uncancellable = true;
        return true;
    }
    return false;
}

// Inflict some amount of Doom on the player. Returns true if this was enough
// to cause a Bane to be inflicted.