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PseudoRandom: Expose constant PSEUDORANDOM_MAX

stable-0.4
kwolekr 2014-12-28 03:09:24 -05:00
parent 8334100fe1
commit 8c98f497d9
1 changed files with 5 additions and 3 deletions
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8
src/noise.h
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@ -30,6 +30,8 @@
#include "irr_v3d.h" #include "irr_v3d.h"
#include "util/string.h" #include "util/string.h"
#define PSEUDORANDOM_MAX 32767
extern FlagDesc flagdesc_noiseparams[]; extern FlagDesc flagdesc_noiseparams[];
class PseudoRandom class PseudoRandom
@ -45,15 +47,15 @@ public:
{ {
m_next = seed; m_next = seed;
} }
// Returns 0...32767 // Returns 0...PSEUDORANDOM_MAX
int next() int next()
{ {
m_next = m_next * 1103515245 + 12345; m_next = m_next * 1103515245 + 12345;
return((unsigned)(m_next/65536) % 32768); return((unsigned)(m_next/65536) % (PSEUDORANDOM_MAX + 1));
} }
int range(int min, int max) int range(int min, int max)
{ {
if(max-min > 32768/10) if (max-min > (PSEUDORANDOM_MAX + 1) / 10)
{ {
//dstream<<"WARNING: PseudoRandom::range: max > 32767"<<std::endl; //dstream<<"WARNING: PseudoRandom::range: max > 32767"<<std::endl;
assert(0); assert(0);