static inline mwvector exponentialDiskAccel(const Disk* disk, mwvector pos, real r)
{
const real b = disk->scaleLength;
const real expPiece = mw_exp(-r / b) * (r + b) / b;
const real factor = disk->mass * (expPiece - 1.0) / cube(r);
return mw_mulvs(pos, factor);
}
/* get stream & background weight constants */
static real get_stream_bg_weight_consts(StreamStats* ss, const Streams* streams)
{
unsigned int i;
real epsilon_b;
real denom = 1.0;
for (i = 0; i < streams->number_streams; i++)
denom += mw_exp(streams->parameters[i].epsilon);
for (i = 0; i < streams->number_streams; i++)
{
ss[i].epsilon_s = mw_exp(streams->parameters[i].epsilon) / denom;
printf("epsilon_s[%d]: %lf\n", i, ss[i].epsilon_s);
}
epsilon_b = 1.0 / denom;
printf("epsilon_b: %lf\n", epsilon_b);
return epsilon_b;
}
void setExpStreamWeights(const AstronomyParameters* ap, Streams* streams)
{
int i;
streams->sumExpWeights = ap->exp_background_weight;
for (i = 0; i < streams->number_streams; i++)
{
streams->parameters[i].epsilonExp = mw_exp(streams->parameters[i].epsilon);
streams->sumExpWeights += streams->parameters[i].epsilonExp;
}
streams->sumExpWeights *= 0.001;
}
int setAstronomyParameters(AstronomyParameters* ap, const BackgroundParameters* bgp)
{
ap->alpha = bgp->alpha;
ap->q = bgp->q;
ap->r0 = bgp->r0;
ap->delta = bgp->delta;
ap->q_inv = inv(ap->q);
ap->q_inv_sqr = inv(sqr(ap->q));
ap->aux_bg_profile = (bgp->a != 0.0) || (bgp->b != 0.0) || (bgp->c != 0.0);
ap->bg_a = bgp->a;
ap->bg_b = bgp->b;
ap->bg_c = bgp->c;
if (ap->convolve == 0 || ap->convolve > MAX_CONVOLVE || !mwEven(ap->convolve))
{
mw_printf("convolve (%u) must be > 0, <= 256 and even\n", ap->convolve);
return 1;
}
// ap->coeff = 1.0 / (stdev * SQRT_2PI);
ap->alpha_delta3 = 3.0 - ap->alpha + ap->delta;
ap->exp_background_weight = mw_exp(bgp->epsilon);
//Check if we need to use fast or slow hernquist if we are not using Broken Power Law which doesn't care.
if(ap->background_profile != BROKEN_POWER_LAW)
{
if(ap->alpha == 1.0 && ap->delta == 1.0)
{
ap->background_profile = FAST_HERNQUIST;
}
else
{
ap->background_profile = SLOW_HERNQUIST;
}
}
ap->sun_r0 = const_sun_r0;
ap->m_sun_r0 = -ap->sun_r0;
return 0;
}
int setAstronomyParameters(AstronomyParameters* ap, const BackgroundParameters* bgp)
{
#ifdef ANDROID
int armExt = mwDetectARMExt();
#endif
ap->alpha = bgp->alpha;
ap->q = bgp->q;
ap->r0 = bgp->r0;
ap->delta = bgp->delta;
ap->q_inv = inv(ap->q);
ap->q_inv_sqr = inv(sqr(ap->q));
ap->aux_bg_profile = (bgp->a != 0.0) || (bgp->b != 0.0) || (bgp->c != 0.0);
ap->bg_a = bgp->a;
ap->bg_b = bgp->b;
ap->bg_c = bgp->c;
if (ap->convolve == 0 || ap->convolve > 256 || !mwEven(ap->convolve))
{
warn("convolve (%u) must be > 0, <= 256 and even\n", ap->convolve);
return 1;
}
ap->coeff = 1.0 / (stdev * SQRT_2PI);
ap->alpha_delta3 = 3.0 - ap->alpha + ap->delta;
ap->exp_background_weight = mw_exp(bgp->epsilon);
ap->fast_h_prob = (ap->alpha == 1.0 && ap->delta == 1.0);
ap->sun_r0 = const_sun_r0;
ap->m_sun_r0 = -ap->sun_r0;
#ifdef ANDROID
if (armExt==ARM_CPU_NOVFP && ap->fast_h_prob && ap->r0 < 0.0)
{
warn("IntFp Engine cant handle r0<0.0\n");
return 1;
}
#endif
return 0;
}
