public void GenerateLightningBoltStandard(LightningBolt bolt, Vector3 start, Vector3 end, int generation, int totalGenerations, float offsetAmount, LightningBoltParameters p)
{
if (generation < 1)
{
return;
}
LightningBoltSegmentGroup group = bolt.AddGroup();
group.Segments.Add(new LightningBoltSegment {
Start = start, End = end
});
// every generation, get the percentage we have gone down and square it, this makes lines thinner
float widthMultiplier = (float)generation / (float)totalGenerations;
widthMultiplier *= widthMultiplier;
Vector3 randomVector;
group.LineWidth = p.TrunkWidth * widthMultiplier;
group.Generation = generation;
group.Color = new Color32(byte.MaxValue, byte.MaxValue, byte.MaxValue, (byte)(255.0f * widthMultiplier));
group.EndWidthMultiplier = p.EndWidthMultiplier * p.ForkEndWidthMultiplier;
if (offsetAmount <= 0.0f)
{
offsetAmount = (end - start).magnitude * p.ChaosFactor;
}
while (generation-- > 0)
{
int previousStartIndex = group.StartIndex;
group.StartIndex = group.Segments.Count;
for (int i = previousStartIndex; i < group.StartIndex; i++)
{
start = group.Segments[i].Start;
end = group.Segments[i].End;
// determine a new direction for the split
Vector3 midPoint = (start + end) * 0.5f;
// adjust the mid point to be the new location
RandomVector(bolt, ref start, ref end, offsetAmount, p.Random, out randomVector);
midPoint += randomVector;
// add two new segments
group.Segments.Add(new LightningBoltSegment {
Start = start, End = midPoint
});
group.Segments.Add(new LightningBoltSegment {
Start = midPoint, End = end
});
CreateFork(bolt, p, generation, totalGenerations, start, midPoint);
}
// halve the distance the lightning can deviate for each generation down
offsetAmount *= 0.5f;
}
}
public void GenerateLightningBolt(LightningBolt bolt, LightningBoltParameters p)
{
Vector3 start = p.ApplyVariance(p.Start, p.StartVariance);
Vector3 end = p.ApplyVariance(p.End, p.EndVariance);
OnGenerateLightningBolt(bolt, start, end, p);
}
public void CreateFork(LightningBolt bolt, LightningBoltParameters p, int generation, int totalGenerations, Vector3 start, Vector3 midPoint)
{
if (ShouldCreateFork(p, generation, totalGenerations))
{
Vector3 branchVector = (midPoint - start) * p.ForkMultiplier();
Vector3 splitEnd = midPoint + branchVector;
GenerateLightningBoltStandard(bolt, midPoint, splitEnd, generation, totalGenerations, 0.0f, p);
}
}
/// <summary>
/// Create multiple lightning bolts, attempting to batch them into as few draw calls as possible
/// </summary>
/// <param name="parameters">Lightning bolt creation parameters</param>
public void CreateLightningBolts(ICollection <LightningBoltParameters> parameters)
{
if (parameters != null && parameters.Count != 0)
{
UpdateTexture();
LightningBolt bolt = GetOrCreateLightningBolt();
LightningBoltDependencies dependencies = CreateLightningBoltDependencies(parameters);
bolt.SetupLightningBolt(dependencies);
}
}
public void GenerateLightningBolt(LightningBoltParameters p, LightningBolt bolt)
{
CurrentBolt = bolt;
Vector3 start = p.ApplyVariance(p.Start, p.StartVariance);
Vector3 end = p.ApplyVariance(p.End, p.EndVariance);
OnGenerateLightningBolt(start, end, p);
CurrentBolt = null;
}
/// <summary>
/// Create a lightning bolt
/// </summary>
/// <param name="p">Lightning bolt creation parameters</param>
public virtual void CreateLightningBolt(LightningBoltParameters p)
{
if (p != null)
{
UpdateTexture();
oneParameterArray[0] = p;
LightningBolt bolt = GetOrCreateLightningBolt();
LightningBoltDependencies dependencies = CreateLightningBoltDependencies(oneParameterArray);
bolt.SetupLightningBolt(dependencies);
}
}
public void RandomVector(LightningBolt bolt, ref Vector3 start, ref Vector3 end, float offsetAmount, System.Random random, out Vector3 result)
{
if (bolt.CameraMode == CameraMode.Perspective)
{
Vector3 direction = (end - start).normalized;
Vector3 side = Vector3.Cross(start, end);
if (side == Vector3.zero)
{
// slow path, rarely hit unless cross product is zero
GetPerpendicularVector(ref direction, out side);
}
else
{
side.Normalize();
}
// generate random distance and angle
float distance = (((float)random.NextDouble() + 0.1f) * offsetAmount);
#if DEBUG
float rotationAngle = ((float)random.NextDouble() * 360.0f);
result = Quaternion.AngleAxis(rotationAngle, direction) * side * distance;
#else
// optimized path for RELEASE mode, skips two normalize and two multiplies in Quaternion.AngleAxis
float rotationAngle = ((float)random.NextDouble() * Mathf.PI);
direction *= (float)System.Math.Sin(rotationAngle);
Quaternion rotation;
rotation.x = direction.x;
rotation.y = direction.y;
rotation.z = direction.z;
rotation.w = (float)System.Math.Cos(rotationAngle);
result = rotation * side * distance;
#endif
}
else if (bolt.CameraMode == CameraMode.OrthographicXY)
{
// XY plane
end.z = start.z;
Vector3 directionNormalized = (end - start).normalized;
Vector3 side = new Vector3(-directionNormalized.y, directionNormalized.x, 0.0f);
float distance = ((float)random.NextDouble() * offsetAmount * 2.0f) - offsetAmount;
result = side * distance;
}
else
{
// XZ plane
end.y = start.y;
Vector3 directionNormalized = (end - start).normalized;
Vector3 side = new Vector3(-directionNormalized.z, 0.0f, directionNormalized.x);
float distance = ((float)random.NextDouble() * offsetAmount * 2.0f) - offsetAmount;
result = side * distance;
}
}
internal void AddActiveBolt(LightningBolt bolt)
{
#if DEBUG
if (bolt == null || activeBolts.Contains(bolt))
{
Debug.LogError("Attempted to add null or duplicate active lightning bolt");
return;
}
#endif
// only called from the main thread
activeBolts.Add(bolt);
}
private void UpdateActiveBolts()
{
for (int i = activeBolts.Count - 1; i >= 0; i--)
{
LightningBolt bolt = activeBolts[i];
if (!bolt.Update())
{
// bolt is done, remove it and put back in cache
activeBolts.RemoveAt(i);
bolt.Cleanup();
lightningBoltCache.Add(bolt);
}
}
}
private LightningBolt GetOrCreateLightningBolt()
{
if (lightningBoltCache.Count == 0)
{
#if ENABLE_PROFILING
Debug.Log("Lightning cache miss");
#endif
return(new LightningBolt());
}
LightningBolt b = lightningBoltCache[lightningBoltCache.Count - 1];
lightningBoltCache.RemoveAt(lightningBoltCache.Count - 1);
return(b);
}
/// <summary>
/// Create multiple lightning bolts, attempting to batch them into as few draw calls as possible
/// </summary>
/// <param name="parameters">Lightning bolt creation parameters</param>
public void CreateLightningBolts(ICollection <LightningBoltParameters> parameters)
{
#if UNITY_EDITOR
if (Camera == null)
{
UnityEngine.Debug.LogError("Camera not assigned to lightning script. Either set the camera or tag your camera as main camera.");
}
#endif
if (parameters != null && parameters.Count != 0 && Camera != null)
{
UpdateTexture();
LightningBolt bolt = GetOrCreateLightningBolt();
LightningBoltDependencies dependencies = CreateLightningBoltDependencies(parameters);
bolt.SetupLightningBolt(dependencies);
}
}
/// <summary>
/// Create a lightning bolt
/// </summary>
/// <param name="p">Lightning bolt creation parameters</param>
public virtual void CreateLightningBolt(LightningBoltParameters p)
{
#if UNITY_EDITOR
if (Camera == null)
{
UnityEngine.Debug.LogError("Camera not assigned to lightning script. Either set the camera or tag your camera as main camera.");
}
#endif
if (p != null && Camera != null)
{
UpdateTexture();
oneParameterArray[0] = p;
LightningBolt bolt = GetOrCreateLightningBolt();
LightningBoltDependencies dependencies = CreateLightningBoltDependencies(oneParameterArray);
bolt.SetupLightningBolt(dependencies);
}
}
private void OnSceneLoaded(UnityEngine.SceneManagement.Scene arg0, UnityEngine.SceneManagement.LoadSceneMode arg1)
{
LightningBolt.ClearCache();
}
private LineRendererMesh CreateLineRenderer(LightningBolt lightningBolt, List<LineRendererMesh> lineRenderers)
{
LineRendererMesh lineRenderer;
if (rendererCache.Count == 0)
{
// create a line renderer in a new game object underneath the parent
GameObject obj = new GameObject();
obj.name = "LightningBoltMeshRenderer";
obj.hideFlags = HideFlags.HideAndDontSave;
lineRenderer = obj.AddComponent<LineRendererMesh>();
}
else
{
lineRenderer = rendererCache[rendererCache.Count - 1];
rendererCache.RemoveAt(rendererCache.Count - 1);
}
// clear parent - this ensures that the rotation and scale can be reset before assigning a new parent
lineRenderer.gameObject.transform.parent = null;
lineRenderer.gameObject.transform.rotation = Quaternion.identity;
lineRenderer.gameObject.transform.localScale = Vector3.one;
lineRenderer.gameObject.transform.parent = lightningBolt.Parent.transform;
lineRenderer.gameObject.layer = lightningBolt.Parent.layer; // maintain the layer of the parent
if (lightningBolt.UseWorldSpace)
{
lineRenderer.gameObject.transform.position = Vector3.zero;
}
else
{
lineRenderer.gameObject.transform.localPosition = Vector3.zero;
}
lineRenderer.Material = (lightningBolt.HasGlow ? Material : MaterialNoGlow);
lineRenderer.MeshRenderer.sortingLayerName = lightningBolt.SortLayerName;
lineRenderer.MeshRenderer.sortingOrder = lightningBolt.SortOrderInLayer;
currentLineRenderer = lineRenderer;
lineRenderers.Add(lineRenderer);
return lineRenderer;
}
public void Begin(LightningBolt lightningBolt)
{
List<LineRendererMesh> lineRenderers;
if (!renderers.TryGetValue(lightningBolt, out lineRenderers))
{
lineRenderers = new List<LineRendererMesh>();
renderers[lightningBolt] = lineRenderers;
CreateLineRenderer(lightningBolt, lineRenderers);
}
}
public void End(LightningBolt lightningBolt)
{
if (currentLineRenderer != null)
{
Script.StartCoroutine(EnableRenderer(currentLineRenderer, lightningBolt));
currentLineRenderer = null;
}
}
public void Cleanup(LightningBolt lightningBolt)
{
List<LineRendererMesh> lineRenderers;
if (renderers.TryGetValue(lightningBolt, out lineRenderers))
{
renderers.Remove(lightningBolt);
foreach (LineRendererMesh lineRenderer in lineRenderers)
{
rendererCache.Add(lineRenderer);
lineRenderer.Reset();
}
}
}
protected override void OnGenerateLightningBolt(LightningBolt bolt, Vector3 start, Vector3 end, LightningBoltParameters p)
{
GenerateLightningBoltPath(bolt, start, end, p);
}
public void GenerateLightningBoltPath(LightningBolt bolt, Vector3 start, Vector3 end, LightningBoltParameters p)
{
if (p.Points.Count < 2)
{
Debug.LogError("Lightning path should have at least two points");
return;
}
int generation = p.Generations;
int totalGenerations = generation;
float offsetAmount, d;
int smoothingFactor = p.SmoothingFactor - 1;
Vector3 distance, randomVector;
LightningBoltSegmentGroup group = bolt.AddGroup();
group.LineWidth = p.TrunkWidth;
group.Generation = generation--;
group.EndWidthMultiplier = p.EndWidthMultiplier;
group.Color = Color.white;
p.Start = p.Points[0] + start;
p.End = p.Points[p.Points.Count - 1] + end;
end = p.Start;
for (int i = 1; i < p.Points.Count; i++)
{
start = end;
end = p.Points[i];
distance = (end - start);
d = PathGenerator.SquareRoot(distance.sqrMagnitude);
if (p.ChaosFactor > 0.0f)
{
if (bolt.CameraMode == CameraMode.Perspective)
{
end += (d * p.ChaosFactor * RandomDirection3D(p.Random));
}
else if (bolt.CameraMode == CameraMode.OrthographicXY)
{
end += (d * p.ChaosFactor * RandomDirection2D(p.Random));
}
else
{
end += (d * p.ChaosFactor * RandomDirection2DXZ(p.Random));
}
distance = (end - start);
}
group.Segments.Add(new LightningBoltSegment {
Start = start, End = end
});
offsetAmount = d * p.ChaosFactor;
RandomVector(bolt, ref start, ref end, offsetAmount, p.Random, out randomVector);
if (ShouldCreateFork(p, generation, totalGenerations))
{
Vector3 branchVector = distance * p.ForkMultiplier() * smoothingFactor * 0.5f;
Vector3 forkEnd = end + branchVector + randomVector;
GenerateLightningBoltStandard(bolt, start, forkEnd, generation, totalGenerations, 0.0f, p);
}
if (--smoothingFactor == 0)
{
smoothingFactor = p.SmoothingFactor - 1;
}
}
}
private IEnumerator EnableRenderer(LineRendererMesh renderer, LightningBolt lightningBolt)
{
yield return new WaitForSeconds(lightningBolt.MinimumDelay);
if (renderer != null && lightningBolt.IsActive)
{
renderer.Begin();
}
}
public void GenerateLightningBolt(LightningBolt bolt, LightningBoltParameters p)
{
Vector3 start, end;
GenerateLightningBolt(bolt, p, out start, out end);
}
protected virtual void OnGenerateLightningBolt(LightningBolt bolt, Vector3 start, Vector3 end, LightningBoltParameters p)
{
GenerateLightningBoltStandard(bolt, start, end, p.Generations, p.Generations, 0.0f, p);
}
public void AddGroup(LightningBolt lightningBolt, LightningBoltSegmentGroup group, float growthMultiplier)
{
if (group.SegmentCount == 0)
{
return;
}
List<LineRendererMesh> lineRenderers = renderers[lightningBolt];
LineRendererMesh lineRenderer = lineRenderers[lineRenderers.Count - 1];
float timeStart = Time.timeSinceLevelLoad + group.Delay;
Vector4 fadeLifeTime = new Vector4(timeStart, timeStart + group.PeakStart, timeStart + group.PeakEnd, timeStart + group.LifeTime);
float radius = group.LineWidth * 0.5f * LightningBoltParameters.Scale;
int lineCount = (group.Segments.Count - group.StartIndex);
float radiusStep = (radius - (radius * group.EndWidthMultiplier)) / (float)lineCount;
// growth multiplier
float timeStep, timeOffset;
if (growthMultiplier > 0.0f)
{
timeStep = (group.LifeTime / (float)lineCount) * growthMultiplier;
timeOffset = 0.0f;
}
else
{
timeStep = 0.0f;
timeOffset = 0.0f;
}
if (!lineRenderer.PrepareForLines(lineCount))
{
Script.StartCoroutine(EnableRenderer(lineRenderer, lightningBolt));
lineRenderer = CreateLineRenderer(lightningBolt, lineRenderers);
}
lineRenderer.BeginLine(group.Segments[group.StartIndex].Start, group.Segments[group.StartIndex].End, radius, group.Color, fadeLifeTime, GlowWidthMultiplier, GlowIntensityMultiplier);
for (int i = group.StartIndex + 1; i < group.Segments.Count; i++)
{
radius -= radiusStep;
if (growthMultiplier < 1.0f)
{
timeOffset += timeStep;
fadeLifeTime = new Color(timeStart + timeOffset, timeStart + group.PeakStart + timeOffset, timeStart + group.PeakEnd, timeStart + group.LifeTime);
}
lineRenderer.AppendLine(group.Segments[i].Start, group.Segments[i].End, radius, group.Color, fadeLifeTime, GlowWidthMultiplier, GlowIntensityMultiplier);
}
}
