Nullable <SimData.Particle> FindParticle(ComputeBuffer particleBuffer, int numParticles, int id)
{
Nullable <SimData.Particle> target = null;
foundParticles.SetCounterValue(0);
findParticles.SetBuffer(0, "particles", particleBuffer);
findParticles.SetBuffer(0, "foundParticles", foundParticles);
findParticles.SetInt("particleId", id);
findParticles.SetInt("count", numParticles);
findParticles.Dispatch(0, particleBuffer.count / 8, 1, 1);
int[] args = new int[] { 0, 1, 0, 0, 0 };
foundParticlesArgs.SetData(args);
ComputeBuffer.CopyCount(foundParticles, foundParticlesArgs, 0);
foundParticlesArgs.GetData(args);
//Debug.Log(string.Format("Found {0} particles with id {1}", args[0], id));
if (args[0] > 0)
{
var found = new SimData.Particle[1];
foundParticles.GetData(found);
target = found[0];
}
return(target);
}
void Update()
{
if (Input.GetButtonDown("Fire1") && !EventSystem.current.IsPointerOverGameObject())
{
Ray ray = camera.ScreenPointToRay(Input.mousePosition);
targetParticleRenderer = null;
targetParticle = null;
int targetParticleIdx = -1;
float targetParticleDist = float.MaxValue;
var particleRenderers = GameObject.FindObjectsOfType <Particles>();
foreach (var particleRenderer in particleRenderers)
{
if (!particleRenderer.gameObject.activeSelf || particleRenderer.frameData.Frame == null)
{
continue;
}
SimData.SimFrame frame = (SimData.SimFrame)particleRenderer.frameData.Frame;
unsafe
{
for (var i = 0; i < frame.particles.Length; i++)
{
var p = UnsafeUtility.ReadArrayElement <SimData.Particle>(frame.particles.GetUnsafeReadOnlyPtr(), i);
if (
(p.flags & SimData.PARTICLE_FLAG_ACTIVE) < 1 ||
p.pos.x < particleVisibleRangeXSlider.LowValue ||
p.pos.x > particleVisibleRangeXSlider.HighValue ||
p.pos.y < particleVisibleRangeYSlider.LowValue ||
p.pos.y > particleVisibleRangeYSlider.HighValue ||
p.pos.z < particleVisibleRangeZSlider.LowValue ||
p.pos.z > particleVisibleRangeZSlider.HighValue
)
{
continue;
}
var pPos = p.pos.UnityVector();
var particlePos = particleRenderer.transform.position + pPos * particleRenderer.DrawScale;
//Debug.Log("particlePos " + p.id + ", " + particlePos.ToString("F4") + ", r " + p.radius * 10);
if (IntersectRaySphere(ray, particlePos, p.radius * particleRenderer.DrawScale))
{
var particleDist = (ray.origin - particlePos).magnitude;
if (particleDist < targetParticleDist)
{
targetParticleRenderer = particleRenderer;
targetParticleIdx = i;
targetParticle = p;
targetParticleDist = particleDist;
}
}
}
//fixed (SimData.Particle* ps = particleRenderer.frameData.Frame.particles.GetUnsafeReadOnlyPtr())
//{
// Debug.Log("ps " + m[0] + ", " + m[1] + ", " + m[2] + ", " + m[3]);
//}
}
}
if (targetParticle != null)
{
SimData.Particle tp = (SimData.Particle)targetParticle;
//LogParticleState(tp.id);
foreach (var particleRenderer in particleRenderers)
{
particleRenderer.TargetParticleId = tp.id;
}
}
else
{
foreach (var particleRenderer in particleRenderers)
{
particleRenderer.TargetParticleId = -1;
}
}
}
ResolveTargetParticle();
//if (Input.GetKeyDown(KeyCode.X))
//{
// if (targetParticle != null)
// {
// SimData.Particle tp = (SimData.Particle)targetParticle;
// LogParticleState(tp.id);
// }
//}
}