void RandomlySpread()
{
for (int i = 0; i < particleNum; ++i) //对于每个粒子
{
float midRadius = (maxRadius + minRadius) / 2; //计算平均半径
float minRate = UnityEngine.Random.Range(1.0f, midRadius / minRadius); //在1到midRadius / minRadius之间产生一个随机数
float maxRate = UnityEngine.Random.Range(midRadius / maxRadius, 1.0f); //在midRadius / maxRadius到1之间产生一个随机数
float _radius = UnityEngine.Random.Range(minRadius * minRate, maxRadius * maxRate); //在minRadius * minRate到maxRadius * maxRate之间产生一个随机数 设置为当前半径
radius[i] = _radius; //设置半径
float collect_MidRadius = (collect_MaxRadius + collect_MinRadius) / 2; //计算平均半径
float collect_outRate = Random.Range(1.0f, collect_MidRadius / collect_MinRadius);; //在1到midRadius / minRadius之间产生一个随机数
float collect_inRate = Random.Range(collect_MaxRadius / collect_MidRadius, 1f); //在midRadius / maxRadius到1之间产生一个随机数
float _collect_radius = Random.Range(collect_MinRadius * collect_outRate, collect_MaxRadius * collect_inRate); //在minRadius * minRate到maxRadius * maxRate之间产生一个随机数 设置为当前半径
collect_radius[i] = _collect_radius; //设置半径
float angle = UnityEngine.Random.Range(0.0f, 360.0f); //随机获取角度
float theta = angle / 180 * Mathf.PI; //计算角度出弧度制下对应的值
float time = UnityEngine.Random.Range(0.0f, 360.0f); //随机获取时间
if (isCollected == 0) //当前为外圈
{
particles[i] = new particleData(_radius, angle, time); //设置为外圈参数
}
else //当前为内圈
{
particles[i] = new particleData(_collect_radius, angle, time); //设置为内圈参数
}
particleArr[i].position = new Vector3(particles[i].radius * Mathf.Cos(theta), 0f, particles[i].radius * Mathf.Sin(theta)); //根据半径和角度计算出所处位置
}
parSys.SetParticles(particleArr, particleArr.Length); //设定粒子数组
}
private void OnEnable()
{
//初始化
int vector3stride = sizeof(float) * 3; //值为12 计算3个FLOAT的大小 1个单精度float是4字节
int colorStride = sizeof(float) * 4; //4字节*4=16
stride = vector3stride + colorStride; //统计一个结构体的长度 其值为12+16=28字节
Buffer = new ComputeBuffer(count, stride); //count个粒子 每个粒子占用大小
//Buffer=new ComputeBuffer(count,28);//这里吧stride改成28亦可
kernelid = compute.FindKernel("ComputeParticle");
//填充数据 给这几十万个粒子赋初始值
datas = new particleData[count];
for (int t = 0; t < datas.Length; t++)
{
datas[t] = new particleData();
}
Buffer.SetData(datas); //往buffer里填结构体数据
compute.SetBuffer(kernelid, "outputData", Buffer); //把buffer里的数据传给compute shader去计算
mymat.SetBuffer("inputbuffer", Buffer); // 把buffer的数据也传给vertex/fragment shader去渲染
}
// Generates a single wind particle
void createParticle(particleData thisData) {
}