// Update is called once per frame
void Update()
{
// Map buffers for reading / writing.
particles = Flex.Map(_particleBuffer);
velocities = Flex.Map(_velocityBuffer);
phases = Flex.Map(_phaseBuffer);
// Spawn particles.
//spawnParticles(particles, velocities, phases);
// Render particles.
RenderParticles(particles, velocities, phases);
// Unmap buffers.
Flex.Unmap(_particleBuffer);
Flex.Unmap(_velocityBuffer);
Flex.Unmap(_phaseBuffer);
// Write to device (async).
Flex.SetParticles(_solver, _particleBuffer);
Flex.SetVelocities(_solver, _velocityBuffer);
Flex.SetPhases(_solver, _phaseBuffer);
// Tick.
Flex.UpdateSolver(_solver, Time.deltaTime, 1);
// Read back (async).
Flex.GetParticles(_solver, _particleBuffer);
Flex.GetVelocities(_solver, _velocityBuffer);
Flex.GetPhases(_solver, _phaseBuffer);
}
public void UpdateMesh(FlexContainer.ParticleData _particleData)
{
transform.rotation = Quaternion.identity;
if (m_scene && m_scene.container && m_fluidMaterial)
{
int[] indices = m_scene.container.fluidIndices;
int indexCount = m_scene.container.fluidIndexCount;
if (indices.Length <= 0)
{
return;
}
if (m_indexBuffer != null && indexCount != m_indexBuffer.count) // @@@
{
m_indexBuffer.Release();
m_indexBuffer = null;
}
if (m_indexBuffer == null && indexCount > 0)
{
m_indexBuffer = new ComputeBuffer(indexCount, sizeof(int));
m_mesh.SetIndices(new int[indexCount], MeshTopology.Points, 0);
}
if (m_indexBuffer != null)
{
m_indexBuffer.SetData(indices);
}
Vector3 boundsMin = Vector3.one * 1e10f, boundsMax = Vector3.one * 1e10f;
if (indexCount > 0)
{
int maxParticles = m_scene.container.maxParticles;
Flex.GetParticles(m_scene.container.solver, m_positionBuffer0);
Flex.GetAnisotropy(m_scene.container.solver, m_anisotropy1Buffer0, m_anisotropy2Buffer0, m_anisotropy3Buffer0);
CopyBufferContent(m_positionBuffer0, m_positionBuffer);
CopyBufferContent(m_anisotropy1Buffer0, m_anisotropy1Buffer);
CopyBufferContent(m_anisotropy2Buffer0, m_anisotropy2Buffer);
CopyBufferContent(m_anisotropy3Buffer0, m_anisotropy3Buffer);
m_fluidMaterial.SetBuffer("_Points", m_positionBuffer);
m_fluidMaterial.SetBuffer("_Anisotropy1", m_anisotropy1Buffer);
m_fluidMaterial.SetBuffer("_Anisotropy2", m_anisotropy2Buffer);
m_fluidMaterial.SetBuffer("_Anisotropy3", m_anisotropy3Buffer);
m_fluidMaterial.SetBuffer("_Indices", m_indexBuffer);
FlexUtils.ComputeBounds(_particleData.particleData.particles, ref indices[0], indices.Length, ref boundsMin, ref boundsMax);
}
Vector3 center = (boundsMin + boundsMax) * 0.5f;
Vector3 size = boundsMax - boundsMin;
m_bounds.center = Vector3.zero;
m_bounds.size = size;
m_bounds.Expand(m_scene.container.radius);
m_mesh.bounds = m_bounds;
transform.position = center;
}
}
public void TestSetParticlesPhases()
{
float DELTA_T = 0.016f;
float INTERACTION_DISTANCE = 0.5f;
float SOLID_REST_DISTANCE = 0.2f;
Flex.Library lib = Flex.Init(Flex.FLEX_VERSION, ErrorCallback);
Flex.SolverDesc desc = default(Flex.SolverDesc);
Flex.SetSolverDescDefaults(ref desc);
desc.maxParticles = 1000;
desc.maxDiffuseParticles = 1000;
Flex.Solver solver = Flex.CreateSolver(lib, ref desc);
Flex.Params prms = new Flex.Params();
Flex.GetParams(solver, ref prms);
prms.radius = INTERACTION_DISTANCE;
prms.solidRestDistance = SOLID_REST_DISTANCE;
Flex.SetParams(solver, ref prms);
Flex.Buffer particles = CreateBuffer(lib, 2, 4, new float[]
{
-0.001f, 0.0f, 0.0f, 1.0f,
0.001f, 0.0f, 0.0f, 1.0f,
});
Flex.SetParticles(solver, particles);
Flex.Buffer phases = CreateBuffer(lib, 2, 1, new int[]
{
Flex.MakePhase(1, Flex.Phase.SelfCollide),
Flex.MakePhase(1, Flex.Phase.SelfCollide),
});
Flex.SetPhases(solver, phases);
Flex.SetActiveCount(solver, 2);
Flex.Buffer active = CreateBuffer(lib, 2, 1, new int[]
{
0, 1,
});
Flex.SetActive(solver, active);
Flex.UpdateSolver(solver, DELTA_T, 1);
Flex.GetParticles(solver, particles);
float[] values; ReadBuffer(lib, particles, 2, 4, out values);
Assert.AreEqual(SOLID_REST_DISTANCE, Vector3.Distance(new Vector3(values[0], values[1], values[2]), new Vector3(values[4], values[5], values[6])));
Flex.FreeBuffer(particles);
Flex.FreeBuffer(phases);
Flex.FreeBuffer(active);
Flex.DestroySolver(solver);
Flex.Shutdown(lib);
}
public void TestSetSpringConstraints()
{
float DELTA_T = 0.016f;
float INTERACTION_DISTANCE = 0.5f;
float SOLID_REST_DISTANCE = 0.2f;
float SPRING_LENGTH = 1.0f;
Flex.Library lib = Flex.Init(Flex.FLEX_VERSION, ErrorCallback);
Flex.SolverDesc desc = default(Flex.SolverDesc);
Flex.SetSolverDescDefaults(ref desc);
desc.maxParticles = 1000;
desc.maxDiffuseParticles = 1000;
Flex.Solver solver = Flex.CreateSolver(lib, ref desc);
Flex.Params prms = new Flex.Params();
Flex.GetParams(solver, ref prms);
prms.radius = INTERACTION_DISTANCE;
prms.solidRestDistance = SOLID_REST_DISTANCE;
Flex.SetParams(solver, ref prms);
Flex.Buffer particles = CreateBuffer(lib, 2, 4, new float[]
{
-0.001f, 0.0f, 0.0f, 1.0f,
0.001f, 0.0f, 0.0f, 1.0f,
});
Flex.SetParticles(solver, particles);
Flex.Buffer indices = CreateBuffer(lib, 2, 1, new int[] { 0, 1 });
Flex.Buffer lengths = CreateBuffer(lib, 1, 1, new float[] { SPRING_LENGTH });
Flex.Buffer stiffness = CreateBuffer(lib, 1, 1, new float[] { 1.0f });
Flex.SetSprings(solver, indices, lengths, stiffness, 1);
Flex.SetActiveCount(solver, 2);
Flex.Buffer active = CreateBuffer(lib, 2, 1, new int[] { 0, 1 });
Flex.SetActive(solver, active);
Flex.UpdateSolver(solver, DELTA_T, 1);
Flex.GetParticles(solver, particles);
float[] values; ReadBuffer(lib, particles, 2, 4, out values);
Assert.AreEqual(SPRING_LENGTH, Vector3.Distance(new Vector3(values[0], values[1], values[2]), new Vector3(values[4], values[5], values[6])), 0.001f);
Flex.FreeBuffer(particles);
Flex.FreeBuffer(indices);
Flex.FreeBuffer(lengths);
Flex.FreeBuffer(stiffness);
Flex.FreeBuffer(active);
Flex.DestroySolver(solver);
Flex.Shutdown(lib);
}
public void TestParamsPlaneCollision()
{
float DELTA_T = 0.016f;
float INTERACTION_DISTANCE = 0.5f;
float SOLID_REST_DISTANCE = 0.2f;
Vector3 GRAVITY = new Vector3(0, -9.81f, 0);
Flex.Library lib = Flex.Init(Flex.FLEX_VERSION, ErrorCallback);
Flex.SolverDesc desc = default(Flex.SolverDesc);
Flex.SetSolverDescDefaults(ref desc);
desc.maxParticles = 1000;
desc.maxDiffuseParticles = 0;
Flex.Solver solver = Flex.CreateSolver(lib, ref desc);
Flex.Params prms = new Flex.Params();
Flex.GetParams(solver, ref prms);
prms.radius = INTERACTION_DISTANCE;
prms.solidRestDistance = SOLID_REST_DISTANCE;
prms.gravity = GRAVITY;
prms.plane0 = new Vector4(0.0f, 1.0f, 0.0f, 0.0f);
prms.numPlanes = 1;
Flex.SetParams(solver, ref prms);
Flex.Buffer particles = CreateBuffer(lib, 1, 4, new float[] { 0.0f, 2.0f, 0.0f, 1.0f });
Flex.SetParticles(solver, particles);
Flex.SetActiveCount(solver, 1);
Flex.Buffer active = CreateBuffer(lib, 1, 1, new int[] { 0 });
Flex.CopyDesc cpyDsc; cpyDsc.srcOffset = cpyDsc.dstOffset = 0; cpyDsc.elementCount = 1;
Flex.SetActive(solver, active, ref cpyDsc);
for (int i = 0; i < 100; ++i)
{
Flex.UpdateSolver(solver, DELTA_T, 1);
}
Flex.GetParticles(solver, particles);
float[] values; ReadBuffer(lib, particles, 1, 4, out values);
Assert.AreEqual(0, values[1], 0.001f);
Flex.FreeBuffer(active);
Flex.FreeBuffer(particles);
Flex.DestroySolver(solver);
Flex.Shutdown(lib);
}
private void PullParticlesFromGPU(IntPtr solverPtr, FlexContainer cnt, Flex.Memory memory)
{
Flex.GetParticles(m_solverPtr, m_cntr.m_particlesHndl.AddrOfPinnedObject(), m_cntr.m_particlesCount, memory);
Flex.GetVelocities(m_solverPtr, m_cntr.m_velocitiesHndl.AddrOfPinnedObject(), m_cntr.m_particlesCount, memory);
Flex.GetPhases(m_solverPtr, m_cntr.m_phasesHndl.AddrOfPinnedObject(), m_cntr.m_particlesCount, memory);
Flex.GetSmoothParticles(m_solverPtr, m_cntr.m_smoothedParticlesHndl.AddrOfPinnedObject(), m_cntr.m_particlesCount, memory);
Flex.GetNormals(m_solverPtr, m_cntr.m_normalsHndl.AddrOfPinnedObject(), m_cntr.m_particlesCount, memory);
Flex.GetDensities(m_solverPtr, m_cntr.m_densitiesHndl.AddrOfPinnedObject(), memory);
Flex.GetBounds(m_solverPtr, ref m_minBounds, ref m_maxBounds, memory);
if (m_cntr.m_shapeCoefficients.Length > 0)
{
Flex.GetRigidTransforms(m_solverPtr, m_cntr.m_shapeRotationHndl.AddrOfPinnedObject(), m_cntr.m_shapeTranslationsHndl.AddrOfPinnedObject(), memory);
}
}
public void TestSetGetParticles()
{
Vector3 GRAVITY = new Vector3(1, 2, 3);
float DELTA_T = 0.016f;
Flex.Library lib = Flex.Init(Flex.FLEX_VERSION, ErrorCallback);
Flex.SolverDesc desc = default(Flex.SolverDesc);
Flex.SetSolverDescDefaults(ref desc);
desc.maxParticles = 1000;
desc.maxDiffuseParticles = 1000;
Flex.Solver solver = Flex.CreateSolver(lib, ref desc);
Flex.Params prms = new Flex.Params();
Flex.GetParams(solver, ref prms);
prms.gravity = GRAVITY;
Flex.SetParams(solver, ref prms);
Flex.Buffer particles = CreateBuffer(lib, 1, 4, new float[]
{
0.0f, 0.0f, 0.0f, 1.0f,
});
Flex.SetParticles(solver, particles);
Flex.SetActiveCount(solver, 1);
Flex.Buffer active = CreateBuffer(lib, 1, 1, new int[]
{
0,
});
Flex.SetActive(solver, active);
Flex.UpdateSolver(solver, DELTA_T, 1);
Flex.GetParticles(solver, particles);
float[] values; ReadBuffer(lib, particles, 1, 4, out values);
for (int i = 0; i < 3; ++i)
{
Assert.AreEqual(GRAVITY * DELTA_T * DELTA_T, new Vector3(values[0], values[1], values[2]));
}
Flex.FreeBuffer(particles);
Flex.FreeBuffer(active);
Flex.DestroySolver(solver);
Flex.Shutdown(lib);
}
