private void SetSwarmerTransformForRandomSetup(
ref SwarmShaderSwarmerState inoutSwarmerState)
{
inoutSwarmerState.Position =
Vector3.Scale(new Vector3(3.0f, 0.5f, 3.0f), UnityEngine.Random.insideUnitSphere);
Vector3 randomForward = UnityEngine.Random.onUnitSphere;
Vector3 randomUp = UnityEngine.Random.onUnitSphere;
Vector3.OrthoNormalize(ref randomForward, ref randomUp);
inoutSwarmerState.LocalForward = randomForward;
inoutSwarmerState.LocalUp = randomUp;
}
private void SetSwarmerTransformForPinwheelTiledFloor(
int swarmerIndex,
ref SwarmShaderSwarmerState inoutSwarmerState)
{
int swarmersPerTile = 6;
// NOTE: The pinwheels-clusters tile as a hexagon.
int tileIndex = (swarmerIndex / swarmersPerTile);
int patternIndex = (swarmerIndex % swarmersPerTile);
int tilingStride = Mathf.CeilToInt(Mathf.Sqrt(SwarmerCount / (float)swarmersPerTile));
int tileRowIndex = ((tileIndex / tilingStride) - (tilingStride / 2));
int tileColumnIndex = ((tileIndex % tilingStride) - (tilingStride / 2));
Vector3 swarmerCenterToRightWingtip = (SwarmerModelScale * swarmerModel.SwarmerCenterToRightWingtip);
Matrix4x4 patternTransform = Matrix4x4.identity;
patternTransform = (
Matrix4x4.TRS(
(-1.0f * swarmerCenterToRightWingtip),
Quaternion.identity,
Vector3.one) *
patternTransform);
patternTransform = (
Matrix4x4.TRS(
Vector3.zero,
Quaternion.AngleAxis((90.0f + (60.0f * patternIndex)), Vector3.up),
Vector3.one) *
patternTransform);
Vector3 tileSize = new Vector3(
(6.0f * (swarmerCenterToRightWingtip.x * Mathf.Sin(60.0f * Mathf.Deg2Rad))),
0.0f,
(3.0f * swarmerCenterToRightWingtip.x));
Vector3 tilePosition =
Vector3.Scale(
tileSize,
new Vector3(
(tileColumnIndex / 2.0f),
0.0f,
tileRowIndex + (0.5f * (tileColumnIndex % 2))));
inoutSwarmerState.Position = (tilePosition + patternTransform.MultiplyPoint(Vector3.zero));
inoutSwarmerState.LocalForward = patternTransform.MultiplyVector(Vector3.forward);
inoutSwarmerState.LocalUp = patternTransform.MultiplyVector(Vector3.up);
}
private bool TryAllocateBuffers()
{
bool result = false;
if (!SystemInfo.supportsComputeShaders)
{
Debug.LogError("Compute shaders are not supported on this machine. Is DX11 or later installed?");
}
else if ((BehaviorComputeShader != null) &&
(CommonSwarmComputeShader != null))
{
advanceSwarmersKernel =
BehaviorComputeShader.FindKernel("kernel_advance_swarmer_states");
kernelForExtractSwarmerPositions =
CommonSwarmComputeShader.FindKernel("kernel_extract_swarmer_positions");
if (forcefieldsBufferQueue == null)
{
forcefieldsBufferQueue =
new Queue <TypedComputeBuffer <SwarmShaderForcefieldState> >(ForcefieldsComputeBufferCount);
while (forcefieldsBufferQueue.Count < ForcefieldsComputeBufferCount)
{
forcefieldsBufferQueue.Enqueue(
new TypedComputeBuffer <SwarmShaderForcefieldState>(MaxForcefieldCount));
}
// NOTE: There's no need to immediately initialize the buffers, since they will be populated per-frame.
}
if (swarmerStateBuffers.IsInitialized == false)
{
var initialSwarmers = new List <SwarmShaderSwarmerState>(SwarmerCount);
for (int swarmerIndex = 0; swarmerIndex < SwarmerCount; ++swarmerIndex)
{
var newSwarmerState = new SwarmShaderSwarmerState();
SetSwarmerTransformForHexLaceTiledFloor(swarmerIndex, ref newSwarmerState);
//SetSwarmerTransformForPinwheelTiledFloor(swarmerIndex, ref newSwarmerState);
//SetSwarmerTransformForRandomSetup(ref newSwarmerState);
//SetSwarmerTransformForTripletTiledFloor(swarmerIndex, ref newSwarmerState);
newSwarmerState.Speed = SwarmerSpeedIdle;
initialSwarmers.Add(newSwarmerState);
}
swarmerStateBuffers.TryAllocateComputeBuffersWithValues(initialSwarmers.ToArray());
}
if ((advanceSwarmersKernel != -1) &&
(kernelForExtractSwarmerPositions != -1) &&
(forcefieldsBufferQueue != null) &&
swarmerStateBuffers.IsInitialized)
{
result = true;
}
else
{
// Abort any partial-allocations.
ReleaseBuffers();
}
}
if (DebugEnabled)
{
Debug.LogFormat("Compute buffer allocation attempted. [Success={0}]", result);
}
return(result);
}
private void SetSwarmerTransformForTripletTiledFloor(
int swarmerIndex,
ref SwarmShaderSwarmerState inoutSwarmerState)
{
int swarmersPerTile = 6;
// NOTE: For simplicity the tiles are pairs of triplets (forming a parallelogram).
int tileIndex = (swarmerIndex / swarmersPerTile);
int patternIndex = (swarmerIndex % swarmersPerTile);
int tilingStride = Mathf.CeilToInt(Mathf.Sqrt(SwarmerCount / (float)swarmersPerTile));
int tileRowIndex = ((tileIndex / tilingStride) - (tilingStride / 2));
int tileColumnIndex = ((tileIndex % tilingStride) - (tilingStride / 2));
Vector3 swarmerCenterToRightWingtip = (SwarmerModelScale * swarmerModel.SwarmerCenterToRightWingtip);
Matrix4x4 patternTransform = Matrix4x4.identity;
if (patternIndex < 3)
{
patternTransform = (
Matrix4x4.TRS(
(-1.0f * swarmerCenterToRightWingtip),
Quaternion.identity,
Vector3.one) *
patternTransform);
patternTransform = (
Matrix4x4.TRS(
Vector3.zero,
Quaternion.AngleAxis((90.0f + (120.0f * patternIndex)), Vector3.up),
Vector3.one) *
patternTransform);
}
else
{
Vector3 swarmerCenterToLeftWingtip = swarmerCenterToRightWingtip;
swarmerCenterToLeftWingtip.x *= -1.0f;
patternTransform = (
Matrix4x4.TRS(
(-1.0f * swarmerCenterToLeftWingtip),
Quaternion.identity,
Vector3.one) *
patternTransform);
patternTransform = (
Matrix4x4.TRS(
Vector3.zero,
Quaternion.AngleAxis((-90.0f + (120.0f * patternIndex)), Vector3.up),
Vector3.one) *
patternTransform);
}
Vector3 tileSize = new Vector3(
(6.0f * (swarmerCenterToRightWingtip.x * Mathf.Sin(60.0f * Mathf.Deg2Rad))),
0.0f,
(3.0f * swarmerCenterToRightWingtip.x));
Vector3 tilePosition =
Vector3.Scale(
tileSize,
new Vector3(
(tileColumnIndex / 2.0f),
0.0f,
tileRowIndex + (0.5f * (tileColumnIndex % 2))));
inoutSwarmerState.Position = (tilePosition + patternTransform.MultiplyPoint(Vector3.zero));
inoutSwarmerState.LocalForward = patternTransform.MultiplyVector(Vector3.forward);
inoutSwarmerState.LocalUp = patternTransform.MultiplyVector(Vector3.up);
}
private void SetSwarmerTransformForHexLaceTiledFloor(
int swarmerIndex,
ref SwarmShaderSwarmerState inoutSwarmerState)
{
int swarmersPerTile = 6;
// NOTE: The lace-pattern tiles as a hexagon.
int tileIndex = (swarmerIndex / swarmersPerTile);
int patternIndex = (swarmerIndex % swarmersPerTile);
int tilingStride = Mathf.CeilToInt(Mathf.Sqrt(SwarmerCount / (float)swarmersPerTile));
int tileRowIndex = ((tileIndex / tilingStride) - (tilingStride / 2));
int tileColumnIndex = ((tileIndex % tilingStride) - (tilingStride / 2));
Vector3 swarmerCenterToRightWingtip = (SwarmerModelScale * swarmerModel.SwarmerCenterToRightWingtip);
Matrix4x4 patternTransform = Matrix4x4.identity;
// Place the swarmer along the X+ axis, facing Z+.
{
patternTransform = (
Matrix4x4.TRS(
(
(-1.0f * swarmerCenterToRightWingtip) +
((2 * swarmerCenterToRightWingtip.x) * Vector3.right)
),
Quaternion.identity,
Vector3.one) *
patternTransform);
}
// Rotate the swarmer into position around the tile's center.
{
Vector3 originToTileCenter =
new Vector3(
swarmerCenterToRightWingtip.x,
0.0f,
(2 * (swarmerCenterToRightWingtip.x * Mathf.Sin(60.0f * Mathf.Deg2Rad))));
patternTransform = (
Matrix4x4.TRS(
(-1.0f * originToTileCenter),
Quaternion.identity,
Vector3.one) *
patternTransform);
patternTransform = (
Matrix4x4.TRS(
Vector3.zero,
Quaternion.AngleAxis((60.0f * patternIndex), Vector3.up),
Vector3.one) *
patternTransform);
patternTransform = (
Matrix4x4.TRS(
originToTileCenter,
Quaternion.identity,
Vector3.one) *
patternTransform);
}
Vector3 tileSize = new Vector3(
(6.0f * swarmerCenterToRightWingtip.x),
0.0f,
(4.0f * (swarmerCenterToRightWingtip.x * Mathf.Sin(60.0f * Mathf.Deg2Rad))));
Vector3 tilePosition =
Vector3.Scale(
tileSize,
new Vector3(
(tileColumnIndex / 2.0f),
0.0f,
tileRowIndex + (0.5f * (tileColumnIndex % 2))));
inoutSwarmerState.Position = (tilePosition + patternTransform.MultiplyPoint(Vector3.zero));
inoutSwarmerState.LocalForward = patternTransform.MultiplyVector(Vector3.forward);
inoutSwarmerState.LocalUp = patternTransform.MultiplyVector(((patternIndex % 2) == 0) ? Vector3.up : Vector3.down);
}