diff options
Diffstat (limited to 'core/math/math_funcs.cpp')
| -rw-r--r-- | core/math/math_funcs.cpp | 76 |
1 files changed, 36 insertions, 40 deletions
diff --git a/core/math/math_funcs.cpp b/core/math/math_funcs.cpp index c730b4fa30..ccc463c114 100644 --- a/core/math/math_funcs.cpp +++ b/core/math/math_funcs.cpp @@ -29,7 +29,7 @@ #include "math_funcs.h" #include "core/os/os.h" -pcg32_random_t Math::default_pcg = {1, PCG_DEFAULT_INC_64}; +pcg32_random_t Math::default_pcg = { 1, PCG_DEFAULT_INC_64 }; #define PHI 0x9e3779b9 @@ -39,30 +39,29 @@ static uint32_t Q[4096]; // TODO: we should eventually expose pcg.inc too uint32_t Math::rand_from_seed(uint64_t *seed) { - pcg32_random_t pcg = {*seed, PCG_DEFAULT_INC_64}; + pcg32_random_t pcg = { *seed, PCG_DEFAULT_INC_64 }; uint32_t r = pcg32_random_r(&pcg); *seed = pcg.state; return r; } void Math::seed(uint64_t x) { - default_pcg.state=x; + default_pcg.state = x; } void Math::randomize() { OS::Time time = OS::get_singleton()->get_time(); - seed(OS::get_singleton()->get_ticks_usec()*(time.hour+1)*(time.min+1)*(time.sec+1)*rand()); // TODO: can be simplified. + seed(OS::get_singleton()->get_ticks_usec() * (time.hour + 1) * (time.min + 1) * (time.sec + 1) * rand()); // TODO: can be simplified. } uint32_t Math::rand() { return pcg32_random_r(&default_pcg); } - int Math::step_decimals(double p_step) { - static const int maxn=9; - static const double sd[maxn]={ + static const int maxn = 9; + static const double sd[maxn] = { 0.9999, // somehow compensate for floating point error 0.09999, 0.009999, @@ -74,9 +73,9 @@ int Math::step_decimals(double p_step) { 0.000000009999 }; - double as=Math::abs(p_step); - for(int i=0;i<maxn;i++) { - if (as>=sd[i]) { + double as = Math::abs(p_step); + for (int i = 0; i < maxn; i++) { + if (as >= sd[i]) { return i; } } @@ -84,46 +83,45 @@ int Math::step_decimals(double p_step) { return maxn; } -double Math::dectime(double p_value,double p_amount, double p_step) { +double Math::dectime(double p_value, double p_amount, double p_step) { double sgn = p_value < 0 ? -1.0 : 1.0; double val = Math::abs(p_value); - val-=p_amount*p_step; - if (val<0.0) - val=0.0; - return val*sgn; + val -= p_amount * p_step; + if (val < 0.0) + val = 0.0; + return val * sgn; } double Math::ease(double p_x, double p_c) { - if (p_x<0) - p_x=0; - else if (p_x>1.0) - p_x=1.0; - if (p_c>0) { - if (p_c<1.0) { - return 1.0-Math::pow(1.0-p_x,1.0/p_c); + if (p_x < 0) + p_x = 0; + else if (p_x > 1.0) + p_x = 1.0; + if (p_c > 0) { + if (p_c < 1.0) { + return 1.0 - Math::pow(1.0 - p_x, 1.0 / p_c); } else { - return Math::pow(p_x,p_c); + return Math::pow(p_x, p_c); } - } else if (p_c<0) { + } else if (p_c < 0) { //inout ease - if (p_x<0.5) { - return Math::pow(p_x*2.0,-p_c)*0.5; + if (p_x < 0.5) { + return Math::pow(p_x * 2.0, -p_c) * 0.5; } else { - return (1.0-Math::pow(1.0-(p_x-0.5)*2.0,-p_c))*0.5+0.5; + return (1.0 - Math::pow(1.0 - (p_x - 0.5) * 2.0, -p_c)) * 0.5 + 0.5; } } else return 0; // no ease (raw) } -double Math::stepify(double p_value,double p_step) { - if (p_step!=0) { - p_value=Math::floor( p_value / p_step + 0.5 ) * p_step; +double Math::stepify(double p_value, double p_step) { + if (p_step != 0) { + p_value = Math::floor(p_value / p_step + 0.5) * p_step; } return p_value; } - uint32_t Math::larger_prime(uint32_t p_val) { static const uint32_t primes[] = { @@ -159,11 +157,11 @@ uint32_t Math::larger_prime(uint32_t p_val) { 0, }; - int idx=0; + int idx = 0; while (true) { - ERR_FAIL_COND_V(primes[idx]==0,0); - if (primes[idx]>p_val) + ERR_FAIL_COND_V(primes[idx] == 0, 0); + if (primes[idx] > p_val) return primes[idx]; idx++; } @@ -173,14 +171,12 @@ uint32_t Math::larger_prime(uint32_t p_val) { double Math::random(double from, double to) { unsigned int r = Math::rand(); - double ret = (double)r/(double)RANDOM_MAX; - return (ret)*(to-from) + from; + double ret = (double)r / (double)RANDOM_MAX; + return (ret) * (to - from) + from; } float Math::random(float from, float to) { unsigned int r = Math::rand(); - float ret = (float)r/(float)RANDOM_MAX; - return (ret)*(to-from) + from; + float ret = (float)r / (float)RANDOM_MAX; + return (ret) * (to - from) + from; } - - |