private void ApplyBuoyancy(ComputeBuffer currentVelocity, ComputeBuffer densityTemp, ComputeBuffer pastVelocity, float timeStep)
{
BuoyancyShader.SetFloat("TimeStep", timeStep);
AdventShader.SetInts("MapSize", _mapSize.x, _mapSize.y);
// DEBUG VALUES!
BuoyancyShader.SetFloat("AmbientTemperature", 0f);
BuoyancyShader.SetFloat("Sigma", 1f); // Smoke buoyancy.
BuoyancyShader.SetFloat("Kappa", 0.05f); // Smoke mass.
BuoyancyShader.SetBuffer(_buoyancyMain, "CurrentVelocity", currentVelocity);
BuoyancyShader.SetBuffer(_buoyancyMain, "PastVelocity", pastVelocity);
BuoyancyShader.SetBuffer(_buoyancyMain, "DensityTemp", densityTemp);
BuoyancyShader.Dispatch(_buoyancyMain, (int)math.ceil(_linearMapSize / 64f),
1, 1);
}
private void Start()
{
_adventMain = AdventShader.FindKernel("Advent");
_buoyancyMain = BuoyancyShader.FindKernel("Buoyancy");
_impulseMain = ImpulseShader.FindKernel("Impulse");
_divergenceMain = DivergenceShader.FindKernel("Divergence");
_jacobiMain = JacobiShader.FindKernel("Jacobi");
_subtractMain = SubtractGradientShader.FindKernel("Subtract");
_clearMain = ClearShader.FindKernel("ClearBuffer");
_tilemap = TileMapObject.GetComponent <Tilemap>();
_mapBounds = _tilemap.cellBounds;
_mapSize = new Vector2Int(_mapBounds.size.x, _mapBounds.size.y);
// Calculate obstacle locations
var walls = new float4[_mapSize.x, _mapSize.y];
foreach (var position in _mapBounds.allPositionsWithin)
{
walls[position.x - _mapBounds.xMin, position.y - _mapBounds.yMin] = new float4(100);
if (position.x == _mapBounds.xMin || position.x == _mapBounds.xMax || position.y == _mapBounds.yMin ||
position.y == _mapBounds.yMax)
{
continue; // Even if border tile is a simulate atmo tile, it will be defined as a wall.
}
if (SimulateAtmoTiles.Contains(_tilemap.GetTile(position)))
{
walls[position.x - _mapBounds.xMin, position.y - _mapBounds.yMin] = new float4(-100);
}
}
_linearMapSize = _mapSize.x * _mapSize.y;
_velocity = new RenderTextureRotating(_linearMapSize, ComputeBufferMode.Dynamic);
_densityTemp = new RenderTextureRotating(_linearMapSize);
_pressure = new RenderTextureRotating(_linearMapSize);
_walls = new ComputeBuffer(_linearMapSize, 4 * sizeof(float), ComputeBufferType.Structured, ComputeBufferMode.SubUpdates);
_walls.SetData(walls);
_divergence = new ComputeBuffer(_linearMapSize, 4 * sizeof(float), ComputeBufferType.Structured, ComputeBufferMode.SubUpdates);
}