/// <summary>
/// Generate a ripple at a particular position.
/// </summary>
/// <param name="position">Ripple position.</param>
/// <param name="disturbanceFactor">Range: [0..1]: The disturbance is linearly interpolated between the minimum disturbance and the maximum disturbance by this factor.</param>
/// <param name="pullWaterDown">Pull water down or up?</param>
/// <param name="playSoundEffect">Play the sound effect.</param>
/// <param name="playParticleEffect">Play the particle effect.</param>
/// <param name="smooth">Disturb neighbor vertices to create a smoother ripple (wave).</param>
/// <param name="smoothingFactor">Range: [0..1]: The amount of disturbance to apply to neighbor vertices.</param>
public void GenerateRipple(Vector2 position, float disturbanceFactor, bool pullWaterDown, bool playSoundEffect, bool playParticleEffect, bool smooth, float smoothingFactor = 0.5f)
{
float xPosition = _mainModule.TransformWorldToLocal(position).x;
float leftBoundary = _simulationModule.LeftBoundary;
float rightBoundary = _simulationModule.RightBoundary;
int surfaceVerticesCount = _meshModule.SurfaceVerticesCount;
int startIndex = _simulationModule.IsUsingCustomBoundaries ? 1 : 0;
int endIndex = _simulationModule.IsUsingCustomBoundaries ? surfaceVerticesCount - 2 : surfaceVerticesCount - 1;
if (xPosition < leftBoundary || xPosition > rightBoundary)
{
return;
}
float disturbance = Mathf.Lerp(_minimumDisturbance, _maximumDisturbance, Mathf.Clamp01(disturbanceFactor));
float velocity = (pullWaterDown ? -1f : 1f) * _simulationModule.StiffnessSquareRoot * disturbance;
float delta = (xPosition - leftBoundary) * _meshModule.SubdivisionsPerUnit;
int nearestVertexIndex = startIndex + Mathf.RoundToInt(delta);
var velocities = _simulationModule.Velocities;
velocities[nearestVertexIndex] += velocity;
if (smooth)
{
smoothingFactor = Mathf.Clamp01(smoothingFactor);
float smoothedVelocity = velocity * smoothingFactor;
int previousNearestIndex = nearestVertexIndex - 1;
if (previousNearestIndex >= startIndex)
{
velocities[previousNearestIndex] += smoothedVelocity;
}
int nextNearestIndex = nearestVertexIndex + 1;
if (nextNearestIndex <= endIndex)
{
velocities[nextNearestIndex] += smoothedVelocity;
}
}
_simulationModule.MarkVelocitiesArrayAsChanged();
Vector3 spawnPosition = _mainModule.TransformLocalToWorld(new Vector2(xPosition, _mainModule.Height * 0.5f));
if (playParticleEffect)
{
_particleEffect.PlayParticleEffect(spawnPosition);
}
if (playSoundEffect)
{
_soundEffect.PlaySoundEffect(spawnPosition, disturbanceFactor);
}
}
internal void ResolveCollision(Collider2D objectCollider, bool isObjectEnteringWater)
{
if ((isObjectEnteringWater && !_isOnWaterEnterRipplesActive) || (!isObjectEnteringWater && !_isOnWaterExitRipplesActive))
{
return;
}
if (_collisionMask != (_collisionMask | (1 << objectCollider.gameObject.layer)))
{
return;
}
Vector3[] vertices = _meshModule.Vertices;
float[] velocities = _simulationModule.Velocities;
float stiffnessSquareRoot = _simulationModule.StiffnessSquareRoot;
Vector3 raycastDirection = _mainModule.UpDirection;
int surfaceVerticesCount = _meshModule.SurfaceVerticesCount;
int subdivisionsPerUnit = _meshModule.SubdivisionsPerUnit;
Bounds objectColliderBounds = objectCollider.bounds;
float minColliderBoundsX = _mainModule.TransformWorldToLocal(objectColliderBounds.min).x;
float maxColliderBoundsX = _mainModule.TransformWorldToLocal(objectColliderBounds.max).x;
int firstSurfaceVertexIndex = _simulationModule.IsUsingCustomBoundaries ? 1 : 0;
int lastSurfaceVertexIndex = _simulationModule.IsUsingCustomBoundaries ? surfaceVerticesCount - 2 : surfaceVerticesCount - 1;
float firstSurfaceVertexPosition = vertices[firstSurfaceVertexIndex].x;
int startIndex = Mathf.Clamp(Mathf.RoundToInt((minColliderBoundsX - firstSurfaceVertexPosition) * subdivisionsPerUnit), firstSurfaceVertexIndex, lastSurfaceVertexIndex);
int endIndex = Mathf.Clamp(Mathf.RoundToInt((maxColliderBoundsX - firstSurfaceVertexPosition) * subdivisionsPerUnit), firstSurfaceVertexIndex, lastSurfaceVertexIndex);
int hitPointsCount = 0;
float hitPointsVelocitiesSum = 0f;
Vector2 hitPointsPositionsSum = new Vector2(0f, 0f);
for (int surfaceVertexIndex = startIndex; surfaceVertexIndex <= endIndex; surfaceVertexIndex++)
{
Vector2 surfaceVertexPosition = _mainModule.TransformLocalToWorld(vertices[surfaceVertexIndex]);
RaycastHit2D hit = Physics2D.Raycast(surfaceVertexPosition, raycastDirection, _collisionRaycastMaximumDistance, _collisionMask, _collisionMinimumDepth, _collisionMaximumDepth);
if (hit.collider == objectCollider && hit.rigidbody != null)
{
float velocity = hit.rigidbody.GetPointVelocity(surfaceVertexPosition).y *_velocityMultiplier;
velocity = Mathf.Clamp(Mathf.Abs(velocity), _minimumDisturbance, _maximumDisturbance);
velocities[surfaceVertexIndex] += velocity * stiffnessSquareRoot * (isObjectEnteringWater ? -1f : 1f);
hitPointsVelocitiesSum += velocity;
hitPointsPositionsSum += hit.point;
hitPointsCount++;
}
}
if (hitPointsCount > 0)
{
_simulationModule.MarkVelocitiesArrayAsChanged();
Vector2 hitPointsPositionsMean = hitPointsPositionsSum / hitPointsCount;
Vector3 spawnPosition = new Vector3(hitPointsPositionsMean.x, hitPointsPositionsMean.y, _mainModule.Position.z);
float hitPointsVelocitiesMean = hitPointsVelocitiesSum / hitPointsCount;
float disturbanceFactor = Mathf.InverseLerp(_minimumDisturbance, _maximumDisturbance, hitPointsVelocitiesMean);
if (isObjectEnteringWater)
{
OnWaterEnterRipplesParticleEffect.PlayParticleEffect(spawnPosition);
OnWaterEnterRipplesSoundEffect.PlaySoundEffect(spawnPosition, disturbanceFactor);
if (_onWaterEnter != null)
{
_onWaterEnter.Invoke();
}
}
else
{
OnWaterExitRipplesParticleEffect.PlayParticleEffect(spawnPosition);
OnWaterExitRipplesSoundEffect.PlaySoundEffect(spawnPosition, disturbanceFactor);
if (_onWaterExit != null)
{
_onWaterExit.Invoke();
}
}
}
}
internal void CreateRipples(Vector2 left, Vector2 right, float disturbance, float spread, bool smooth, float smoothingFactor = 0.5f)
{
Vector2 leftVertexPos = _mainModule.TransformPointWorldToLocal(left);
Vector2 rightVertexPos = _mainModule.TransformPointWorldToLocal(right);
float halfWaterHeight = _mainModule.Height * 0.5f;
if (leftVertexPos.y > halfWaterHeight || leftVertexPos.y < -halfWaterHeight)
{
return;
}
int leftVertexIndex;
int rightVertexIndex;
float leftBoundary = _simulationModule.LeftBoundary;
float rightBoundary = _simulationModule.RightBoundary;
int surfaceVerticesCount = _meshModule.SurfaceVerticesCount;
int startIndex = _simulationModule.IsUsingCustomBoundaries ? 1 : 0;
int endIndex = _simulationModule.IsUsingCustomBoundaries ? surfaceVerticesCount - 2 : surfaceVerticesCount - 1;
if (leftVertexPos.x > leftBoundary)
{
leftVertexIndex = startIndex + Mathf.RoundToInt((leftVertexPos.x - leftBoundary) * _meshModule.SubdivisionsPerUnit);
if (leftVertexIndex > endIndex)
{
leftVertexIndex = endIndex;
}
}
else
{
leftVertexIndex = startIndex;
}
if (rightVertexPos.x < rightBoundary)
{
rightVertexIndex = startIndex + Mathf.RoundToInt((rightVertexPos.x - leftBoundary) * _meshModule.SubdivisionsPerUnit);
if (rightVertexIndex < startIndex)
{
rightVertexIndex = startIndex;
}
}
else
{
rightVertexIndex = endIndex;
}
if (leftVertexIndex == rightVertexIndex)
{
return;
}
float velocity = -disturbance * _simulationModule.StiffnessSquareRoot;
var velocities = _simulationModule.Velocities;
var vertices = _meshModule.Vertices;
_affectedVerticesIndices.Clear();
int affectedVerticesCount = Mathf.CeilToInt(Mathf.Abs(rightVertexIndex - leftVertexIndex) * spread);
for (int i = 0; i < affectedVerticesCount + 1;)
{
int vertexIndex = Random.Range(leftVertexIndex, rightVertexIndex + 1);
if (!_affectedVerticesIndices.Contains(vertexIndex))
{
_affectedVerticesIndices.Add(vertexIndex);
i++;
}
}
for (int i = 0; i < affectedVerticesCount; i++)
{
int vertexIndex = _affectedVerticesIndices[i];
velocities[vertexIndex] += velocity;
if (smooth)
{
smoothingFactor = Mathf.Clamp01(smoothingFactor);
float smoothedVelocity = velocity * smoothingFactor;
int previousNearestIndex = vertexIndex - 1;
if (previousNearestIndex >= startIndex)
{
velocities[previousNearestIndex] += smoothedVelocity;
}
int nextNearestIndex = vertexIndex + 1;
if (nextNearestIndex <= endIndex)
{
velocities[nextNearestIndex] += smoothedVelocity;
}
}
}
_simulationModule.MarkVelocitiesArrayAsChanged();
}
internal void PhysicsUpdate(float deltaTime)
{
if (!_isActive || (!_updateWhenOffscreen && !_mainModule.IsVisible))
{
return;
}
_elapsedTime += deltaTime;
if (_elapsedTime >= _currentInterval)
{
if (_randomizeRipplesSourcePositions)
{
RandomizeIndices();
}
int surfaceVerticesCount = _meshModule.SurfaceVerticesCount;
int startIndex = _simulationModule.IsUsingCustomBoundaries ? 1 : 0;
int endIndex = _simulationModule.IsUsingCustomBoundaries ? surfaceVerticesCount - 2 : surfaceVerticesCount - 1;
Vector3[] vertices = _meshModule.Vertices;
float[] velocities = _simulationModule.Velocities;
bool playSoundEffect = _soundEffect.IsActive;
bool playParticleEffect = _particleEffect.IsActive;
for (int i = 0, imax = _ripplesSourcesIndices.Count; i < imax; i++)
{
int index = _ripplesSourcesIndices[i];
float disturbance = _randomizeDisturbance ? Random.Range(_minimumDisturbance, _maximumDisturbance) : _disturbance;
disturbance *= _simulationModule.StiffnessSquareRoot;
velocities[index] -= disturbance;
if (_smoothRipples)
{
float smoothedDisturbance = disturbance * _smoothingFactor;
int previousIndex, nextIndex;
previousIndex = index - 1;
nextIndex = index + 1;
if (previousIndex >= startIndex)
{
velocities[previousIndex] -= smoothedDisturbance;
}
if (nextIndex <= endIndex)
{
velocities[nextIndex] -= smoothedDisturbance;
}
}
#if UNITY_EDITOR
if (!Application.isPlaying)
{
continue;
}
#endif
if (_soundEffect.IsActive || _particleEffect.IsActive)
{
Vector3 spawnPosition = _mainModule.TransformPointLocalToWorld(vertices[index]);
if (playParticleEffect)
{
_particleEffect.PlayParticleEffect(spawnPosition);
}
if (playSoundEffect)
{
float disturbanceFactor = Mathf.InverseLerp(_minimumDisturbance, _maximumDisturbance, disturbance);
_soundEffect.PlaySoundEffect(spawnPosition, disturbanceFactor);
}
}
}
_currentInterval = _randomizeTimeInterval ? Random.Range(_minimumTimeInterval, _maximumTimeInterval) : _timeInterval;
_elapsedTime = 0f;
_simulationModule.MarkVelocitiesArrayAsChanged();
}
}