compute shaders....

Unity Engine
, ,
1

Hi I want to update the screen on unity with the particles moving constantly, but not as fast as I thought … What should I do?

here is the code.

[shader code]
#pragma kernel PositionCS
struct Data{
float x;
float y;
float z;

float vx;
float vy;
float vz;
};

#define SIMULATION_BLOCK_SIZE 1024

StructuredBuffer _datacompare;
RWStructedBuffer _dataparsing;

int _MaxDataMun; // about 760000;

float _PositionX;
float _PositionY;
float _PositionZ;

groupshared Data group[SIMULATION_BLOCK_SIZE];

[numthreads(SIMULATION_BLOCK_SIZE,1,1)]

void PositionCS
(
uint3 DTid : SV_DispatchThreadID,
uint3 Gid : SV_GroupID,
uint3 GTid : SV_GroupThreadID,
uint GI : SV_GroupIndex
)

{
Data c = _datacompare[P_ID];
Data d = _dataparsing[P_ID];
[loop]
for (uint N_block_ID = 0; N_block_ID < (uint)_MaxDataMun; N_block_ID += SIMUALTION_BLOCK_SIZE)
{
group[GI] = _datacompare[N_block_ID+GI];
GroupMemoryBarrierWithGroupSync();
for (int N_tile_ID = 0; N_tile_ID < SIMULATION_BLOCK_SIZE; N_tile_ID++)
{
if (group[N_tile_ID].x == _PositionX && group[N_tile_ID].y == _PositionY && group[N_tile_ID].z == _PositionZ)
{
c.x = group[N_tile_ID].x;
c.y = group[N_tile_ID].y;
c.z = group[N_tile_ID].z;

c.vx = group[N_tile_ID].vx;
c.vy = group[N_tile_ID].vy;
c.vz = group[N_tile_ID].vz;
}
}
GroupMemoryBarrierWithGroupSync();
}
_dataparsing[P_ID] = c;
}
because ‘if statement’ seems to be slowing down, how can we speed it up?

2

For starters, could you use code block to format your code snippet? You find it in insert code button when you edit a message.

And to inform those who might take a look at this, does this code actually function, and you only have issues with some of it’s features/results? I’m asking as there’s some typos there (SIMUALTION_BLOCK_SIZE and SIMULATION_BLOCK_SIZE, for example.)