public TriangleBuffer(Vector3 v1, Vector3 v2, Vector3 v3, Rigidbody rB)
{
Vector3 center = (v1 + v2 + v3) / 3f;
this.velocity = WaterInteractionUtils.GetTriangleVelocity(center, rB);
this.submergedArea = 0f;
this.originalArea = WaterInteractionUtils.GetTriangleArea(v1, v2, v3);
}
public TriangleInfo(VertexInfo vi1, VertexInfo vi2, VertexInfo vi3, int triangleType, Rigidbody rB, float timeStamp)
{
Vector3 v1 = vi1.globalVertex;
Vector3 v2 = vi2.globalVertex;
Vector3 v3 = vi3.globalVertex;
this.center = WaterInteractionUtils.GetTriangleCenter(vi1, vi2, vi3, triangleType);
// beause of simplification. center distance can be positive in submerged triangle
// if height is positive, don't add to force
this.height = WaterPatch.instance.DistanceToWater(this.center, timeStamp);
this.normal = Vector3.Cross(v2 - v1, v3 - v1).normalized;
this.velocity = WaterInteractionUtils.GetTriangleVelocity(this.center, rB);
if (this.velocity.magnitude < 0.0001f)
{
this.cosine = 0;
}
else
{
this.cosine = Vector3.Dot(this.velocity, this.normal) / this.velocity.magnitude;
}
this.area = WaterInteractionUtils.GetTriangleArea(v1, v2, v3);
}
private void OnEnable()
{
timeStamp = Time.time;
SubmergedTriangles = new List <TriangleInfo>();
TriangleBufferIndices = new List <int>();
meshVertices = Mesh.vertices;
meshTriangles = Mesh.triangles;
// Count of triangles is always multiple of 3
int triangleCount = meshTriangles.Length / 3;
PreviousBuffers = new TriangleBuffer[triangleCount];
CurrentBuffers = new TriangleBuffer[triangleCount];
TotalArea = 0f;
for (int triangleIndex = 0; triangleIndex < triangleCount; ++triangleIndex)
{
TotalArea += WaterInteractionUtils.GetTriangleArea(
transform.TransformPoint(meshVertices[meshTriangles[triangleIndex * 3]]),
transform.TransformPoint(meshVertices[meshTriangles[triangleIndex * 3 + 1]]),
transform.TransformPoint(meshVertices[meshTriangles[triangleIndex * 3 + 2]]));
}
}
private void CalculateForce()
{
float zMin = float.MaxValue;
float zMax = float.MinValue;
for (int i = 0; i < triangleBuilder.SubmergedTriangles.Count; ++i)
{
TriangleInfo triangle = triangleBuilder.SubmergedTriangles[i];
if (triangle.center.z < zMin)
{
zMin = triangle.center.z;
}
if (triangle.center.z > zMax)
{
zMax = triangle.center.z;
}
}
float logRigidbodyVelocity = Mathf.Log10(Rigidbody3d.velocity.magnitude);
float travelLengthScaleFactor = Mathf.Log10(zMax - zMin) * 2;
for (int i = 0; i < triangleBuilder.SubmergedTriangles.Count; ++i)
{
TriangleInfo triangle = triangleBuilder.SubmergedTriangles[i];
if (triangle.height > 0f)
{
continue;
}
float lookUpKey = (triangle.center.z - zMin) / (zMax - zMin);
float logFluidTravelLength = curveLookUpTable.LookUp(lookUpKey) * travelLengthScaleFactor;
float viscosityCoefficient = WaterInteractionUtils.CalculateViscosityCoefficient(logRigidbodyVelocity, logFluidTravelLength, logViscosity);
int TriangleBufferIndex = triangleBuilder.TriangleBufferIndices[i];
Vector3 buoyancyForce = WaterInteractionUtils.BuoyancyForce(densityOfWater, triangle);
Vector3 viscousWaterResistance = WaterInteractionUtils.ViscousWaterResistance(densityOfWater, viscosityCoefficient, triangle);
Vector3 pressureDragForce = WaterInteractionUtils.PressureDragForce(triangle, referenceSpeed, pdCoefficient1, pdCoefficient2, pdFallOffPower, sdCoefficient1, sdCoefficient2, sdFallOffPower);
Vector3 slammingForce = WaterInteractionUtils.SlammingForce(triangleBuilder.PreviousBuffers[TriangleBufferIndex], triangleBuilder.CurrentBuffers[TriangleBufferIndex], triangle, maxAcceleration, smRampUpPower, Rigidbody3d.mass, TotalArea);
Vector3 netForce = Vector3.zero;
if (debugBuoyancyForce)
{
netForce += buoyancyForce;
}
if (debugViscousWaterResistance)
{
netForce += viscousWaterResistance;
}
if (debugPressureDrag)
{
netForce += pressureDragForce;
}
if (debugSlammingForce)
{
netForce += slammingForce;
}
Rigidbody3d.AddForceAtPosition(netForce, triangle.center);
// Debug.DrawRay(triangle.center, slammingForce, Color.white);
// Debug.DrawRay(triangle.center, triangle.normal, Color.white);
// Debug.DrawRay(triangle.center, buoyancyForce, Color.blue);
// Debug.DrawRay(triangle.center, viscousWaterResistance, Color.green);
}
}