// Create one cell with a specific position
private FlowfieldCell CreateCell(Vector2 position, Vector2 direction)
{
FlowfieldCell cell = new FlowfieldCell
{
position = position,
direction = direction,
intensity = Random.value
};
return(cell);
}
// Prepare compute buffer for compute shader
private void CreateFlowfieldBuffer()
{
// Calculate cells count for rows & columns
cellsCountX = (int)Mathf.Floor(simulationSpace.x / flowfieldCellSize);
cellsCountY = (int)Mathf.Floor(simulationSpace.y / flowfieldCellSize);
maxCellsCount = cellsCountX * cellsCountY;
// Create buffer for flowfield
flowfieldBuffer = new ComputeBuffer(maxCellsCount, Marshal.SizeOf(typeof(FlowfieldCell)));
var cellsArray = new FlowfieldCell[maxCellsCount];
int iterations = 0;
// Set position for each cell in array
for (int y = 0; y < cellsCountY; y++)
{
for (int x = 0; x < cellsCountX; x++)
{
var currentCell = (x * cellsCountY + y);
Vector2 position = new Vector2(
simulationSpace.x / cellsCountX * x + flowfieldCellSize / 2,
simulationSpace.y / cellsCountY * y + flowfieldCellSize / 2
);
position.x += this.transform.position.x - simulationSpace.x / 2;
position.y += this.transform.position.y - simulationSpace.y / 2;
cellsArray[currentCell] = CreateCell(position, cellDirection[iterations]);
iterations++;
}
}
// Define data for compute buffer
flowfieldBuffer.SetData(cellsArray);
}
