NPC随机响应算法

45%的概率友好致敬

25%的概率转身离开

20%的概率***

10%的概率送礼

int choose()

{

float[] propArray = {45%,25%,20%,10%}

float total = 0.0f;

for(int i = 0 ; i < propArray.length;i++)

{

total += propArray[i];

}

float propValue = Random.value*total;

for(int i = 0 ; i< propArray.length; i++)

{

if(propValue < propArray[i])

{

    return i;

}else{

    propValue -= propArray[i];

}

}

return propArray.length - 1;

}