/// <summary>
/// Optionally Set to a different L-system, and reset the state and the current runtime parameters
/// </summary>
private void ResetState(
LSystemState <float> newState,
LSystemStepper newSystem)
{
if (lSystemPendingCompletable != null)
{
lSystemPendingCompletable.Cancel();
}
lastState?.currentSymbols.Dispose();
lastState = null;
currentState?.currentSymbols.Dispose();
currentState = null;
totalSteps = 0;
lastUpdateChanged = true;
currentState = newState;
runtimeParameters = systemObject.GetRuntimeParameters();
if (newSystem != null)
{
SetNewCompiledSystem(newSystem);
}
// clear out the next state handle. if an update is pending, just abort it.
OnSystemStateUpdated?.Invoke();
}
//Creates the L-System states using the list of known rules by expanding each character with the use of StringBuilder
public void IterateState()
{
LSystemState currentState;
LSystemRule currentRule;
Predicate <LSystemRule> ruleFinder;
StringBuilder sb = new StringBuilder();
for (int i = 1; i <= iterations; i++)
{
currentState = stateList.Last.Value;
sb.Length = 0;
foreach (char character in currentState.State)
{
ruleFinder = delegate(LSystemRule x){ return(x.Index == character); };
currentRule = ruleList.Find(ruleFinder);
if (currentRule != null)
{
sb.Append(currentRule.Rule);
}
else
{
sb.Append(character);
}
}
currentState = new LSystemState(angle, i, sb.ToString());
stateList.AddLast(currentState);
}
}
public void Generate(bool clean = false)
{
// save original sentence
lSystem.SaveOriginalSentence();
if (clean)
{
CleanExistingLSystem();
}
if (lSystem == null)
{
Debug.LogError("You must have an lSystem defined");
enabled = false;
}
if (lSystem.RuleCount == 0)
{
Debug.LogError("You must have at least one rule defined");
enabled = false;
}
lineRenderer = GetComponent <LineRenderer>();
lineRenderer.positionCount = 2;
for (int i = 0; i < numberOfGenerations; i++)
{
savedState.Push(state.Clone());
lSystem.Generate();
state = savedState.Pop();
}
DrawLines();
}
public JobHandle ApplySunlightToSymbols(
LSystemState <float> systemState,
CustomRuleSymbols customSymbols)
{
var idsNativeArray = uniqueSunlightAssignments.ActiveData;
if (idsNativeArray == null)
{
Debug.LogError("no sunlight data available");
return(default);
public SavedData(LSystemSteppingHandle source)
{
this.totalSteps = source.totalSteps;
this.lastUpdateChanged = source.lastUpdateChanged;
this.useSharedSystem = source.useSharedSystem;
this.currentState = source.currentState;
this.lastState = source.lastState;
this.oldHandle = source.globalResourceHandle;
this.systemObjectId = source.systemObject.myId;
this.runtimeParameters = source.runtimeParameters;
this.compiledGlobalCompiletimeReplacements = source.compiledGlobalCompiletimeReplacements;
}
public void reset()
{
ruleList = new List <LSystemRule>();
stateList = new LinkedList <LSystemState>();
/*Set the initial state of the rule system*/
state = new LSystemState(angle, 0, start);
stateList.AddFirst(state);
this.RuleAggregation();
this.IterateState();
LSystemPainter painter = (LSystemPainter)this.GetComponent("LSystemPainter");
painter.create(stateList);
}
public void LSystemReproducesStochasticResultFromReplicatedState()
{
var globalParameters = new string[] { "global" };
LSystemState <float> state = new DefaultLSystemState("A(0)");
using var basicLSystem = LSystemBuilder.FloatSystem(new string[] {
"P(0.5) | A(x) : x < global -> A(x + 1)",
"P(0.5) | A(x) : x < global -> A(x + 0.5)",
"P(0.5) | A(x) : x >= global -> A(x - 1)",
"P(0.5) | A(x) : x >= global -> A(x - 0.5)",
}, globalParameters);
var defaultGlobalParams = new float[] { 3 };
var resultSequence = new List <string>();
var resultSampleSize = 12;
resultSequence.Add(state.currentSymbols.Data.ToString());
LSystemState <float> systemCopyAt5 = null;
for (int i = 1; i < resultSampleSize; i++)
{
if (i == 5)
{
systemCopyAt5 = state;
state = basicLSystem.StepSystem(state, defaultGlobalParams, false);
}
else
{
state = basicLSystem.StepSystem(state, defaultGlobalParams);
}
resultSequence.Add(state.currentSymbols.Data.ToString());
}
state.currentSymbols.Dispose();
for (int i = 5; i < resultSampleSize; i++)
{
systemCopyAt5 = basicLSystem.StepSystem(systemCopyAt5, defaultGlobalParams);
Assert.AreEqual(resultSequence[i], systemCopyAt5.currentSymbols.Data.ToString(), $"Index {i}");
}
systemCopyAt5.currentSymbols.Dispose();
}
void DrawLines()
{
state = new LSystemState()
{
x = 0,
y = 0,
size = lineLength,
angle = 0
};
string sentence = lSystem.GeneratedSentence;
for (int i = 0; i < sentence.Length; i++)
{
char c = sentence[i];
switch (c)
{
case 'F':
Line();
break;
case 'G':
Translate();
break;
case '+':
state.angle += angle;
break;
case '-':
state.angle -= angle;
break;
case '[':
savedState.Push(state.Clone());
break;
case ']':
state = savedState.Pop();
break;
}
}
}
public void Dispose()
{
if (useSharedSystem)
{
systemObject.OnCachedSystemUpdated -= OnSharedSystemRecompiled;
}
else
{
compiledSystem?.Dispose();
compiledSystem = null;
}
lSystemPendingCompletable?.Cancel();
lastState?.currentSymbols.Dispose();
lastState = null;
currentState?.currentSymbols.Dispose();
currentState = null;
globalResourceHandle.Dispose();
}
//Used for drawing the L-System with the initial angle
void renderState(LSystemState state)
{
foreach (char character in state.State)
{
switch (character)
{
case '+': currentAngle -= state.Angle; break;
case '-': currentAngle += state.Angle; break;
case '[': stack.Push(new AnglePos(currentAngle, currentPosition)); break;
case ']':
AnglePos obj = stack.Pop();
currentAngle = obj.angle;
currentPosition = obj.position;
break;
default:
createObject(); break;
}
}
}
/// <summary>
/// Root implementation of Step system, all other step calls funnel here
/// </summary>
/// <param name="runtimeParameters"></param>
/// <param name="repeatLast">True if this system should just repeat the last update. Useful if a runtime parameter changed, or </param>
private void StepSystemAsync(
ArrayParameterRepresenation <float> runtimeParameters,
bool repeatLast = false)
{
ICompletable <LSystemState <float> > pendingStateHandle;
try
{
if (compiledSystem == null || compiledSystem.isDisposed)
{
Debug.LogError("No Compiled system available!");
}
if (repeatLast)
{
globalResourceHandle.UpdateUniqueIdReservationSpace(lastState);
pendingStateHandle = compiledSystem.StepSystemJob(
lastState,
runtimeParameters.GetCurrentParameters());
}
else
{
globalResourceHandle.UpdateUniqueIdReservationSpace(currentState);
var sunlightJob = globalResourceHandle.ApplyPrestepEnvironment(
currentState,
compiledSystem.customSymbols);
pendingStateHandle = compiledSystem.StepSystemJob(
currentState,
runtimeParameters.GetCurrentParameters(),
parameterWriteDependency: sunlightJob);
}
if (pendingStateHandle == null)
{
lSystemPendingCompletable = null;
return;
}
}
catch (System.Exception e)
{
lastUpdateChanged = false;
Debug.LogException(e);
lSystemPendingCompletable = null;
return;
}
lSystemPendingCompletable = CompletableExecutor.Instance.RegisterCompletable(pendingStateHandle);
lSystemPendingCompletable.OnCompleted += (nextState) =>
{
UnityEngine.Profiling.Profiler.BeginSample("updating stepping handle state");
if (repeatLast)
{
// dispose the current state, since it is about to be replaced
currentState?.currentSymbols.Dispose();
}
else
{
// dispose the last state
lastState?.currentSymbols.Dispose();
lastState = currentState;
totalSteps++;
}
currentState = nextState;
// if there are immature markers, use those instead. avoiding an equality check saves time.
var hasImmatureMarkers = systemObject.linkedFiles.immaturitySymbolMarkers.Length > 0;
lastUpdateChanged = hasImmatureMarkers || !(currentState?.currentSymbols.Data.Equals(lastState.currentSymbols.Data) ?? false);
lSystemPendingCompletable = null;
UnityEngine.Profiling.Profiler.EndSample();
OnSystemStateUpdated?.Invoke();
};
}
public void generate(bool once = false)
{
reset();
string sentence;
if (once)
{
sentence = _lSystem.getNewSentence();
}
else
{
sentence = _lSystem.getNewSentencebyStep();
}
if (sentence == null)
{
return;
}
curState = new LSystemState();
for (int i = 0; i < sentence.Length; i++)
{
char c = sentence[i];
if (_drawSymbols.Contains(c))
{
drawLine();
}
else if (_leafSymbols.Contains(c))
{
drawLeaf(_leafPath);
}
else if (_flowerSymbols.Contains(c))
{
drawFlower(_flowerPath);
}
else
{
switch (c)
{
case '+':
curState.angle += _angle;
break;
case '-':
curState.angle -= _angle;
break;
case '[':
stateStack.Push(curState.Clone());
break;
case ']':
curState = stateStack.Pop();
break;
default:
break;
}
}
}
}
