private void CheckResources()
{
if (waterWavesParticlesMaterial == null)
{
waterWavesParticlesMaterial = new Material(waterWavesParticlesShader);
waterWavesParticlesMaterial.hideFlags = HideFlags.DontSave;
}
if (particles == null)
{
particles = new WaveParticlesQuadtree(new Rect(-1000.0f, -1000.0f, 2000.0f, 2000.0f), maxParticlesPerTile, maxParticles);
}
}
protected override void SpawnChildNodes()
{
mesh.Destroy();
mesh = null;
float halfWidth = rect.width * 0.5f;
float halfHeight = rect.height * 0.5f;
base.a = a = new WaveParticlesQuadtree(root, new Rect(rect.xMin, center.y, halfWidth, halfHeight), elements.Length);
base.b = b = new WaveParticlesQuadtree(root, new Rect(center.x, center.y, halfWidth, halfHeight), elements.Length);
base.c = c = new WaveParticlesQuadtree(root, new Rect(rect.xMin, rect.yMin, halfWidth, halfHeight), elements.Length);
base.d = d = new WaveParticlesQuadtree(root, new Rect(center.x, rect.yMin, halfWidth, halfHeight), elements.Length);
vertices = null;
tangentsPack = null;
particleGroups = null;
numParticleGroups = 0;
}
private void Subdivide(WaveParticlesQuadtree quadtree, WaveParticle left, WaveParticle right, ref int numSubdivisions)
{
Vector2 diff = left.position - right.position;
float distance = diff.magnitude;
if (distance * frequency > 1.0f && distance > 1.0f && quadtree.FreeSpace != 0) // don't subdivide below 1m on CPU
{
var newParticle = Create(right.position + diff * 0.5f, (left.direction + right.direction) * 0.5f, (left.baseFrequency + right.baseFrequency) * 0.5f, (left.baseAmplitude + right.baseAmplitude) * 0.5f, (left.lifetime + right.lifetime) * 0.5f, left.isShoreWave);
if (newParticle != null)
{
newParticle.group = left.group;
newParticle.amplitude = (left.amplitude + right.amplitude) * 0.5f;
newParticle.frequency = (left.frequency + right.frequency) * 0.5f;
newParticle.speed = (left.speed + right.speed) * 0.5f;
newParticle.targetSpeed = (left.targetSpeed + right.targetSpeed) * 0.5f;
newParticle.energyBalance = (left.energyBalance + right.energyBalance) * 0.5f;
newParticle.shoaling = (left.shoaling + right.shoaling) * 0.5f;
if (quadtree.AddElement(newParticle))
{
/*const float subdivideEnergyLoss = 0.94f;
*
* left.baseAmplitude *= subdivideEnergyLoss;
* left.amplitude *= subdivideEnergyLoss;
* right.baseAmplitude *= subdivideEnergyLoss;
* right.amplitude *= subdivideEnergyLoss;
* newParticle.baseAmplitude *= subdivideEnergyLoss;
* newParticle.amplitude *= subdivideEnergyLoss;*/
newParticle.leftNeighbour = left;
newParticle.rightNeighbour = right;
left.rightNeighbour = newParticle;
right.leftNeighbour = newParticle;
}
++numSubdivisions;
}
}
}
public int CostlyUpdate(WaveParticlesQuadtree quadtree, float deltaTime)
{
float depth;
if (frequency < 0.025f) // in case of big waves, sample center and front of the particle to get a better result
{
float posx = position.x + direction.x / frequency;
float posy = position.y + direction.y / frequency;
depth = Mathf.Max(StaticWaterInteraction.GetTotalDepthAt(position.x, position.y), StaticWaterInteraction.GetTotalDepthAt(posx, posy));
}
else
{
depth = StaticWaterInteraction.GetTotalDepthAt(position.x, position.y);
}
if (depth <= 0.001f)
{
Destroy();
return(0);
}
UpdateWaveParameters(deltaTime, depth);
int numSubdivisions = 0;
if (quadtree != null && !disallowSubdivision)
{
if (leftNeighbour != null)
{
Subdivide(quadtree, leftNeighbour, this, ref numSubdivisions);
}
if (rightNeighbour != null)
{
Subdivide(quadtree, this, rightNeighbour, ref numSubdivisions);
}
}
return(numSubdivisions);
}
public void CostlyUpdate(WaveParticlesQuadtree quadtree, float time)
{
WaveParticle particle = leftParticle;
float deltaTime = time - lastCostlyUpdateTime;
lastCostlyUpdateTime = time;
int numSubdivisions = 0;
do
{
var p = particle;
particle = particle.rightNeighbour;
numSubdivisions += p.CostlyUpdate(numSubdivisions < 30 ? quadtree : null, deltaTime);
}while(particle != null);
particle = leftParticle;
WaveParticle firstParticleInWave = particle;
int waveLength = 0;
do
{
var p = particle;
particle = particle.rightNeighbour;
++waveLength;
if (p != firstParticleInWave && (p.disallowSubdivision || particle == null))
{
if (waveLength > 3)
{
FilterRefractedDirections(firstParticleInWave, p, waveLength);
}
firstParticleInWave = particle;
waveLength = 0;
}
}while(particle != null);
}
private WaveParticlesQuadtree(WaveParticlesQuadtree root, Rect rect, int maxElementsPerNode) : this(rect, maxElementsPerNode, 0)
{
this.root = root;
}
public WaveParticlesQuadtree(Rect rect, int maxElementsPerNode, int maxTotalElements) : base(rect, maxElementsPerNode, maxTotalElements)
{
root = this;
particleGroups = new WaveParticlesGroup[maxElementsPerNode >> 3];
CreateMesh();
}
private void UpdateParticles(float time)
{
var enabledWaterCameras = WaterCamera.EnabledWaterCameras;
int numEnabledWaterCameras = enabledWaterCameras.Count;
bool isVisible = false;
for (int i = 0; i < numEnabledWaterCameras; ++i)
{
if (rect.Overlaps(enabledWaterCameras[i].LocalMapsRect))
{
isVisible = true;
break;
}
}
int startIndex, endIndex, vertexIndex;
if (!isVisible)
{
startIndex = lastUpdateIndex;
endIndex = lastUpdateIndex + 8;
vertexIndex = startIndex << 2;
if (endIndex >= elements.Length)
{
endIndex = elements.Length;
lastUpdateIndex = 0;
}
else
{
lastUpdateIndex = endIndex;
}
}
else
{
startIndex = 0;
endIndex = elements.Length;
vertexIndex = 0;
}
WaveParticlesQuadtree rootQuadtree = isVisible ? root : null;
float updateDelay = isVisible ? 0.01f : 1.5f;
float costlyUpdateDelay = isVisible ? 0.4f : 8.0f;
bool didCostlyUpdate = false;
updateDelay *= root.stress;
costlyUpdateDelay *= root.stress;
for (int i = 0; particleGroups != null && i < particleGroups.Length; ++i)
{
var group = particleGroups[i];
if (group != null)
{
if (!group.leftParticle.isAlive)
{
--numParticleGroups;
particleGroups[i] = null;
continue;
}
if (time >= group.lastUpdateTime + updateDelay)
{
if (time >= group.lastCostlyUpdateTime + costlyUpdateDelay && !didCostlyUpdate)
{
if (!RectContainsParticleGroup(group))
{
--numParticleGroups;
particleGroups[i] = null;
continue;
}
group.CostlyUpdate(rootQuadtree, time);
didCostlyUpdate = true;
}
group.Update(time);
}
}
}
if (elements != null)
{
for (int i = startIndex; i < endIndex; ++i)
{
var particle = elements[i];
if (particle != null)
{
if (particle.isAlive)
{
if (marginRect.Contains(particle.position))
{
var vertexData = particle.VertexData;
var particleData = particle.PackedParticleData;
vertices[vertexIndex] = vertexData;
tangentsPack[vertexIndex++] = particleData;
vertices[vertexIndex] = vertexData;
tangentsPack[vertexIndex++] = particleData;
vertices[vertexIndex] = vertexData;
tangentsPack[vertexIndex++] = particleData;
vertices[vertexIndex] = vertexData;
tangentsPack[vertexIndex++] = particleData;
tangentsPackChanged = true;
}
else
{
// re-add particle
base.RemoveElementAt(i);
vertices[vertexIndex++].x = float.NaN;
vertices[vertexIndex++].x = float.NaN;
vertices[vertexIndex++].x = float.NaN;
vertices[vertexIndex++].x = float.NaN;
root.AddElement(particle);
}
}
else
{
// remove particle
base.RemoveElementAt(i);
vertices[vertexIndex++].x = float.NaN;
vertices[vertexIndex++].x = float.NaN;
vertices[vertexIndex++].x = float.NaN;
vertices[vertexIndex++].x = float.NaN;
particle.AddToCache();
}
}
else
{
vertexIndex += 4;
}
}
}
}
