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majcostaandGitHub
381ab936eb
* rename 'Standard Gaming Platform' to 'sgp' * Adapt CMakeLists.txt files to renamed SGP directory * Lowercase it
115 lines
2.7 KiB
C++
115 lines
2.7 KiB
C++
#include "Random.h"
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#include "debug control.h"
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extern bool is_client;
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extern bool is_server;
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extern bool is_networked;
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bool gfMPDebugOutputRandoms = false;
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// OJW - 091024 - MP random syncing
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// need to syncronise the randomness of events in a multiplayer game on all clients
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UINT32 MPPreRandom( UINT32 uiRange )
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{
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UINT32 uiNum;
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if( uiRange == 0 )
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return 0;
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//Extract the current pregenerated number
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uiNum = guiPreRandomNums[ guiPreRandomIndex ] * uiRange / RAND_MAX % uiRange;
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if (gfMPDebugOutputRandoms)
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{
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char tmpMPDbgString[512];
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sprintf(tmpMPDbgString,"MPPreRandom ( uiRange : %i , uiPreRandomIndex : %i , uiResult : %i )\n",uiRange, guiPreRandomIndex , uiNum );
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MPDebugMsg(tmpMPDbgString);
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}
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//Go to the next index.
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guiPreRandomIndex++;
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if (guiPreRandomIndex >= MAX_PREGENERATED_NUMS)
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guiPreRandomIndex = 0;
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return uiNum;
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}
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#ifdef BMP_RANDOM//dnl ch55 111009
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#include <windows.h>
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UINT32 guiPreRandomIndex;
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UINT32 guiPreRandomNums[MAX_PREGENERATED_NUMS];
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#include <random>
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std::random_device gRandomDevice; // only used once to initialize (seed) engine
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std::mt19937 gRandomNumberGenerator(gRandomDevice()); // random-number engine used (Mersenne-Twister in this case)
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UINT32 NewRandom(UINT32 max)
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{
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if (is_networked && is_client)
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return MPPreRandom(max);
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if (max <= 1)
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return 0;
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UINT32 min = 0;
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std::uniform_int_distribution<int> uni(min, max - 1); // guaranteed unbiased
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auto random_integer = uni(gRandomNumberGenerator);
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return random_integer;
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}
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UINT32 GetRndNum(UINT32 maxnum)
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{
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if (is_networked && is_client)
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return MPPreRandom(maxnum);
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static UINT32 rnd=0, cnt=0;
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POINT pt;
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if(!(cnt++%RAND_MAX))
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{
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GetCursorPos(&pt);// Get cursor location
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srand(maxnum ^ rnd ^ pt.x ^ pt.y ^ GetTickCount());
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}
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if(maxnum == 0)
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return(0);
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rnd = rand();
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rnd <<= 11;
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rnd ^= rand();
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rnd <<= 7;
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rnd ^= rand();
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return(rnd % maxnum);
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}
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void InitializeRandom(void)
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{
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// Pregenerate all of the random numbers.
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for(guiPreRandomIndex = 0; guiPreRandomIndex<MAX_PREGENERATED_NUMS; guiPreRandomIndex++)
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guiPreRandomNums[guiPreRandomIndex] = GetRndNum(0xFFFFFFFF);
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guiPreRandomIndex = 0;
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}
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#else
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UINT32 guiPreRandomIndex = 0;
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std::vector<UINT32> guiPreRandomNums(MAX_PREGENERATED_NUMS, 0);
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void InitializeRandom()
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{
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// Seed the random-number generator with current time so that
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// the numbers will be different every time we run.
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srand( (unsigned) time(NULL) );
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//Pregenerate all of the random numbers.
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for( guiPreRandomIndex = 0; guiPreRandomIndex < MAX_PREGENERATED_NUMS; guiPreRandomIndex++ )
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{
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guiPreRandomNums[ guiPreRandomIndex ] = rand();
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}
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guiPreRandomIndex = 0;
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}
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#endif
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