void InvokeAnimationKernels()
{
if (_kernel == null)
{
_kernel = new AnimationKernelSet <Kernels, Buffers>(_kernelShader, x => (int)x, x => (int)x);
}
if (!_kernel.ready)
{
// Initialize the animation kernels and buffers.
_kernel.Setup(_source.vertexCount, _historyLength);
_kernel.material.SetFloat("_RandomSeed", _randomSeed);
_kernel.Invoke(Kernels.InitializePosition, Buffers.Position);
_kernel.Invoke(Kernels.InitializeVelocity, Buffers.Velocity);
}
else
{
// Transfer the source position attributes.
_kernel.material.SetTexture("_SourcePositionBuffer0", _source.previousPositionBuffer);
_kernel.material.SetTexture("_SourcePositionBuffer1", _source.positionBuffer);
// Invoke the position update kernel.
_kernel.material.SetTexture("_PositionBuffer", _kernel.GetLastBuffer(Buffers.Position));
_kernel.material.SetTexture("_VelocityBuffer", _kernel.GetLastBuffer(Buffers.Velocity));
_kernel.material.SetFloat("_VelocityScale", _velocityScale);
_kernel.Invoke(Kernels.UpdatePosition, Buffers.Position);
// Invoke the velocity update kernel with the updated positions.
_kernel.material.SetTexture("_PositionBuffer", _kernel.GetWorkingBuffer(Buffers.Position));
_kernel.Invoke(Kernels.UpdateVelocity, Buffers.Velocity);
}
_kernel.SwapBuffers();
}
void InvokeAnimationKernels()
{
if (_kernel == null)
{
_kernel = new AnimationKernelSet <Kernels, Buffers>(_kernelShader, x => (int)x, x => (int)x);
}
if (!_kernel.ready)
{
// Initialize the animation kernels and buffers.
_kernel.Setup(_source.vertexCount, _template.historyLength);
_kernel.material.SetTexture("_SourcePositionBuffer1", _source.positionBuffer);
_kernel.material.SetFloat("_RandomSeed", _randomSeed);
_kernel.Invoke(Kernels.InitializePosition, Buffers.Position);
_kernel.Invoke(Kernels.InitializeVelocity, Buffers.Velocity);
_kernel.Invoke(Kernels.InitializeOrthnorm, Buffers.Orthnorm);
}
else
{
// Transfer the source position attributes.
_kernel.material.SetTexture("_SourcePositionBuffer0", _source.previousPositionBuffer);
_kernel.material.SetTexture("_SourcePositionBuffer1", _source.positionBuffer);
// Invoke the velocity update kernel.
_kernel.material.SetTexture("_PositionBuffer", _kernel.GetLastBuffer(Buffers.Position));
_kernel.material.SetTexture("_VelocityBuffer", _kernel.GetLastBuffer(Buffers.Velocity));
_kernel.material.SetFloat("_SpeedLimit", _speedLimit);
_kernel.Invoke(Kernels.UpdateVelocity, Buffers.Velocity);
// Invoke the position update kernel with the updated velocity.
_kernel.material.SetTexture("_VelocityBuffer", _kernel.GetWorkingBuffer(Buffers.Velocity));
_kernel.material.SetFloat("_Drag", Mathf.Exp(-_drag * Time.deltaTime));
_kernel.Invoke(Kernels.UpdatePosition, Buffers.Position);
// Invoke the orthonormal update kernel with the updated velocity.
_kernel.material.SetTexture("_PositionBuffer", _kernel.GetWorkingBuffer(Buffers.Position));
_kernel.material.SetTexture("_OrthnormBuffer", _kernel.GetLastBuffer(Buffers.Orthnorm));
_kernel.Invoke(Kernels.UpdateOrthnorm, Buffers.Orthnorm);
}
_kernel.SwapBuffers();
}
void InvokeAnimationKernels()
{
if (_kernel == null)
{
_kernel = new AnimationKernelSet <Kernels, Buffers>(_kernelShader, x => (int)x, x => (int)x);
}
if (!_kernel.ready)
{
// Initialize the animation kernels and buffers.
_kernel.Setup(_template.instanceCount, 1);
_kernel.material.SetTexture("_SourcePositionBuffer1", _source.positionBuffer);
_kernel.material.SetFloat("_RandomSeed", _randomSeed);
_kernel.Invoke(Kernels.InitializePosition, Buffers.Position);
_kernel.Invoke(Kernels.InitializeVelocity, Buffers.Velocity);
_kernel.Invoke(Kernels.InitializeRotation, Buffers.Rotation);
}
else
{
// Update kernel parameters.
_kernel.material.SetVector("_Damper", new Vector2(
Mathf.Exp(-_drag * Time.deltaTime), _speedLimit
));
_kernel.material.SetVector("_Gravity", _gravity * Time.deltaTime);
_kernel.material.SetVector("_Life", new Vector2(
Time.deltaTime / _maxLife, Time.deltaTime / (_maxLife * _speedToLife)
));
var pi360dt = Mathf.PI * Time.deltaTime / 360;
_kernel.material.SetVector("_Spin", new Vector2(
_maxSpin * pi360dt, _speedToSpin * pi360dt
));
_kernel.material.SetVector("_NoiseParams", new Vector2(
_noiseFrequency, _noiseAmplitude * Time.deltaTime
));
// Move the noise field backward in the direction of the
// gravity vector, or simply pull up if no gravity is set.
var noiseDir = (_gravity == Vector3.zero) ? Vector3.up : _gravity.normalized;
_noiseOffset += noiseDir * _noiseMotion * Time.deltaTime;
_kernel.material.SetVector("_NoiseOffset", _noiseOffset);
// Transfer the source position attributes.
_kernel.material.SetTexture("_SourcePositionBuffer0", _source.previousPositionBuffer);
_kernel.material.SetTexture("_SourcePositionBuffer1", _source.positionBuffer);
// Invoke the position update kernel.
_kernel.material.SetTexture("_PositionBuffer", _kernel.GetLastBuffer(Buffers.Position));
_kernel.material.SetTexture("_VelocityBuffer", _kernel.GetLastBuffer(Buffers.Velocity));
_kernel.Invoke(Kernels.UpdatePosition, Buffers.Position);
// Invoke the velocity update kernel with the updated positions.
_kernel.material.SetTexture("_PositionBuffer", _kernel.GetWorkingBuffer(Buffers.Position));
_kernel.Invoke(Kernels.UpdateVelocity, Buffers.Velocity);
// Invoke the rotation update kernel with the updated velocity.
_kernel.material.SetTexture("_RotationBuffer", _kernel.GetLastBuffer(Buffers.Rotation));
_kernel.material.SetTexture("_VelocityBuffer", _kernel.GetWorkingBuffer(Buffers.Velocity));
_kernel.Invoke(Kernels.UpdateRotation, Buffers.Rotation);
}
_kernel.SwapBuffers();
}