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Fix siege-engine to compile on Windows - don't have C++11, and pow() is picky about arg types

develop
Quietust 2014-03-25 13:30:45 -05:00
parent e620ae765c
commit 837da8ae98
1 changed files with 13 additions and 3 deletions
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16
plugins/siege-engine.cpp
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@ -252,6 +252,16 @@ static double random_error()
return (rng.drandom0() + rng.drandom0() + rng.drandom0()) * 2.0 - 3.0;
}
// round() is only available in C++11
static int int_round (double val)
{
double frac = val - floor(val);
if (frac < 0.5)
return (int)floor(val);
else
return (int)ceil(val);
}
static const int WEAR_TICKS = 806400;
static bool apply_impact_damage(df::item *item, int minv, int maxv)
@ -385,7 +395,7 @@ static EngineInfo *find_engine(df::building *bld, bool create = false)
obj->fire_range = get_engine_range(ebld, obj->quality);
// Base coefficients per engine type, plus 6% exponential bonus per quality level
obj->sigma_coeff = (obj->is_catapult ? 30.0 : 48.0) * pow(1.06, obj->quality);
obj->sigma_coeff = (obj->is_catapult ? 30.0 : 48.0) * pow(1.06f, obj->quality);
obj->ammo_vector_id = job_item_vector_id::BOULDER;
obj->ammo_item_type = item_type::BOULDER;
@ -1513,8 +1523,8 @@ struct projectile_hook : df::proj_itemst {
// Otherwise use a normal distribution to simulate errors
double sigma = point_distance(path.origin - path.goal) / (engine->sigma_coeff * skill);
int dx = (int)round(random_error() * sigma);
int dy = (int)round(random_error() * sigma);
int dx = int_round(random_error() * sigma);
int dy = int_round(random_error() * sigma);
if (dx == 0 && dy == 0)
{