8805b950
 Liu Meng
物品遗留效果优化
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#include "svibe.h"
#include <stdlib.h>
void RegionSurveillance::RandInit()
{
flag = 0;
i_rand = 0;
int tempX[8] = {2, 2, 1, 0, 0, 0, 1, 2};
int tempY[8] = {1, 0, 0, 0, 1, 2, 2, 2};
for (int tmpi = 0; tmpi < 8; tmpi++)
{
g_XNeighborTable[tmpi] = tempX[tmpi];
g_YNeighborTable[tmpi] = tempY[tmpi];
}
if (flag == 0)
{
int32_t i = 0;
g_randTable = (uint32_t *) malloc(0x10000 * sizeof(uint32_t));
for (i = 0; i < 0x10000; i++)
{
g_randTable[i] = (uint32_t)(rand());
}
}
}
uint32_t RegionSurveillance::GetRand()
{
//static uint32_t i = 0;
//uint32_t i_rand = 0;
return g_randTable[0xFFFF & i_rand++];
}
void RegionSurveillance::FreeRand()
{
free(g_randTable);
}
// static int32_t *g_XTable;
// static int32_t *g_YTable;
// static int32_t g_XNeighborTable[8] = {2, 2, 1, 0, 0, 0, 1, 2};
// static int32_t g_YNeighborTable[8] = {1, 0, 0, 0, 1, 2, 2, 2};
void RegionSurveillance::RandNeighborInit(int32_t width, int32_t height)
{
//static int32_t flag = 0;
int32_t i;
if (flag == 0)
{
flag = 1;
g_XTable = (int32_t *)malloc((width + 2) * sizeof(int32_t));
for (i = 0; i < width; i++)
{
g_XTable[i + 1] = i;
}
g_XTable[0] = 0;
g_XTable[width + 1] = width - 1;
g_YTable = (int32_t *)malloc((height + 2) * sizeof(int32_t));
for (i = 0; i < height; i++)
{
g_YTable[i + 1] = i;
}
g_XTable[0] = 0; //1
g_XTable[height + 1] = height - 1;
}
}
void RegionSurveillance::GetRandNeighborXY(int32_t x, int32_t y, int32_t *_x, int32_t *_y)
{
uint32_t r = GetRand() & 0x07;
*_x = g_XTable[x + g_XNeighborTable[r]];
*_y = g_XTable[y + g_YNeighborTable[r]];
}
void RegionSurveillance::GetNeighborXY(int32_t x, int32_t y, int32_t *_x, int32_t *_y, int32_t flag)
{
*_x = g_XTable[x + g_XNeighborTable[flag]];
*_y = g_XTable[y + g_YNeighborTable[flag]];
}
void RegionSurveillance::FreeRandNeighbor()
{
free(g_XTable);
free(g_YTable);
}
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