just installed pychrono 9.0.0 using conda. btw, i tested without triangularmesh (the test PLATE) and the problem persist.
Le lundi 25 août 2025 à 08:14:41 UTC+1, [email protected] a écrit : > Hi Zaftrox, > > Thank you for the follow up. To help us better identify the problem, could > you please upload the "test PLATE.obj" file? In addition, could you please > provide information on how do you install the PyChrono. Specifically, if > you install PyChrono via conda, could you please also attach your "conda > list" output? > > Best, > > Bocheng Zou > On 8/25/25 06:50, Zaftrox wrote: > > No, there's nothing. > When the simulation starts and the rendering window pop-up it freezes > instantaneously and crash. It comes from the collision so if the particles > cloud is set fixed or by disabling the collision, the simulation works fine. > > Le lundi 25 août 2025 à 04:22:01 UTC+1, [email protected] a écrit : > >> Hi Zaftrox, >> >> Thank you for raising the issue. To help us investigate, could you please >> report if there's any output in the terminal before the program crashes? >> >> Best, >> >> Bocheng Zou >> On 8/25/25 01:07, Zaftrox wrote: >> >> here's the code : >> >> import pychrono.core as chrono >> import pychrono.irrlicht as chronoirr >> import random >> import numpy as np >> >> # Sim-DATA : >> simData = { >> "Density" : 5200, >> "ExpectedDiameter" : .05e-3 >> } >> simData["ParticleVolume"] = >> (3/4)*np.pi*np.power((simData["ExpectedDiameter"]/2), 3) >> simData["ParticleMass"] = simData["ParticleVolume"]*simData["Density"] >> simData["ParticleInertia"] = >> (2/5)*simData["ParticleMass"]*np.power((simData["ExpectedDiameter"]/2), 2) >> >> # Create Chrono physical system >> system = chrono.ChSystemNSC() >> system.SetCollisionSystemType(chrono.ChCollisionSystem.Type_MULTICORE) >> system.SetGravitationalAcceleration(chrono.ChVector3d(0, -9.81, 0)) >> ground = chrono.ChBody() >> ground.SetFixed(True) >> system.Add(ground) >> material = chrono.ChContactMaterialNSC() >> material.SetFriction(.5) >> >> def constrain_to_2D(body): >> # Dummy body as reference : >> dummy = chrono.ChBodyAuxRef() >> dummy.SetFixed(True) >> system.AddBody(dummy) >> >> # Planar constraint and its frame : >> plane_constraint = chrono.ChLinkLockPlanar() >> frame_abs = chrono.ChFramed(body.GetPos(), chrono.QUNIT) >> # Init : >> plane_constraint.Initialize(body, dummy, True, frame_abs, frame_abs) >> # constraint generic mate : >> lock = chrono.ChLinkMateGeneric() >> lock.Initialize(body, dummy, False, frame_abs, frame_abs) >> # Constrain Tz and X/Y rotation in case of offset : >> lock.SetConstrainedCoords(False, False, True, # Tx, Ty, Tz >> True, True, False) # Rx, Ry, Rz >> >> system.Add(lock) >> system.AddLink(plane_constraint) >> >> def importMeshBody(meshFile, material, contrained2D=False, fixed=True, >> scale=0.001, initialPos=chrono.ChVector3d(0, 0, 0), >> colorVec=chrono.ChColor(0.3, 0.3, 0.3)): >> # Prior : >> body = chrono.ChBody() >> system.Add(body) >> body.SetPos(initialPos) >> if contrained2D : >> constrain_to_2D(body) >> # mesh : >> mesh = chrono.ChTriangleMeshConnected() >> mesh.LoadWavefrontMesh(meshFile) >> transformationMatrix = chrono.ChMatrix33d(scale) >> mesh.Transform(chrono.ChVector3d(0,0,0), transformationMatrix) >> >> # Visualization part : >> visShape = chrono.ChVisualShapeTriangleMesh() >> visShape.SetMesh(mesh) >> visShape.SetColor(colorVec) >> body.AddVisualShape(visShape) >> >> # Collision part : >> body_ct_shape = chrono.ChCollisionShapeTriangleMesh(material, mesh, >> False, False, 0.01) >> body.AddCollisionShape(body_ct_shape) >> body.EnableCollision(True) >> body.SetFixed(fixed) >> return body >> >> plate = importMeshBody("test PLATE.obj", material, contrained2D=True, >> scale=.001, fixed=True) >> >> # Particles cloud : >> particles = chrono.ChParticleCloud() >> particles.SetMass(simData["ParticleMass"]) >> particles.SetInertiaXX(chrono.ChVector3d(simData["ParticleInertia"], >> simData["ParticleInertia"], simData["ParticleInertia"])) >> >> # Collision shape/model : >> colModel = chrono.ChCollisionModel() >> colModel.Clear() >> cylShape = chrono.ChCollisionShapeCylinder(material, .01, .002) # radius >> colModel.AddShape(cylShape) >> particles.AddCollisionModel(colModel) >> particles.AddCollisionShape(cylShape) >> >> visShape = chrono.ChVisualShapeCylinder(.01, .002) >> frame = chrono.ChFramed(chrono.ChVector3d(0,0,0), >> chrono.QuatFromAngleAxis(chrono.CH_PI/2, chrono.ChVector3d(1,0,0))) >> particles.AddVisualShape(visShape, frame) >> >> # Add particles (positions only) >> for i in range(20): >> possys = chrono.ChCoordsysd( >> chrono.ChVector3d(random.uniform(-.3, .3), random.uniform(-.3, >> .3), 0), >> chrono.QuatFromAngleAxis(-chrono.CH_PI/2, >> chrono.ChVector3d(1,0,0)) >> ) >> particles.AddParticle(possys) >> particles.EnableCollision(True) >> system.Add(particles) >> >> vis = chronoirr.ChVisualSystemIrrlicht() >> vis.AttachSystem(system) >> vis.SetWindowSize(1024, 768) >> vis.SetWindowTitle("Mixer simulator") >> vis.Initialize() >> vis.AddSkyBox() >> vis.AddCamera(chrono.ChVector3d(0, 0, 2)) >> vis.AddTypicalLights() >> >> time_step = 0.005 >> while vis.Run(): >> vis.BeginScene() >> vis.Render() >> vis.EndScene() >> system.DoStepDynamics(time_step) >> >> >> Le lundi 25 août 2025 à 01:47:32 UTC+1, Dan Negrut a écrit : >> >>> Hi, would you mind dropping the entire PyChrono script, top to bottom, >>> that demonstrates the problem? >>> >>> >>> >>> NOTE: this is a public forum, remove any sensitive information/data. >>> >>> >>> >>> Thank you, >>> >>> Dan >>> >>> --------------------------------------------- >>> >>> Bernard A. and Frances M. Weideman Professor >>> >>> NVIDIA CUDA Fellow >>> >>> Department of Mechanical Engineering >>> >>> Department of Computer Science >>> >>> University of Wisconsin - Madison >>> >>> 4150ME, 1513 University Avenue >>> >>> Madison, WI 53706-1572 >>> >>> 608 772 0914 <(608)%20772-0914> >>> >>> http://sbel.wisc.edu/ >>> >>> http://projectchrono.org/ >>> <https://urldefense.com/v3/__http://projectchrono.org/__;!!Mak6IKo!ITBwK6AoQ7iC2NneNT03ytYMiDYSaYAZrEKJuUflDp6oKyToFy5ZnziS6wqNOxZebNMoYz5M9krJyntijC-1gw$> >>> >>> >>> --------------------------------------------- >>> >>> >>> >>> *From:* [email protected] <[email protected]> *On >>> Behalf Of *Zaftrox >>> *Sent:* Sunday, August 24, 2025 4:04 PM >>> *To:* ProjectChrono <[email protected]> >>> *Subject:* [chrono] Question about the ChParticleCloud, Crash when >>> collisions are enabled >>> >>> >>> >>> Hi, i wanted to create a particlecloud to handle a bunch of cylindrical >>> objects in pychrono. However, when i setup the particlecloud then enable >>> the collisions, it crashs immediately. >>> >>> Here's the snippet : >>> >>> # Particles cloud : >>> particles = chrono.ChParticleCloud() >>> particles.SetMass(simMat["ParticleMass"]) >>> particles.SetInertiaXX(chrono.ChVector3d( simMat["ParticleInertia"], >>> simMat["ParticleInertia"], simMat["ParticleInertia"])) >>> >>> # Collision shape/model : >>> colModel = chrono.ChCollisionModel() >>> colModel.Clear() >>> cylShape = chrono.ChCollisionShapeCylinder(material, .01, .002) >>> colModel.AddShape(cylShape) >>> particles.AddCollisionModel(colModel) >>> particles.AddCollisionShape(cylShape) >>> >>> visShape = chrono.ChVisualShapeCylinder(.01, .002) >>> frame = chrono.ChFramed(chrono.ChVector3d(0,0,0), >>> chrono.QuatFromAngleAxis(chrono.CH_PI/2, chrono.ChVector3d(1,0,0))) >>> particles.AddVisualShape(visShape, frame) >>> >>> # addition loop : >>> for i in range(20): >>> possys = chrono.ChCoordsysd( >>> chrono.ChVector3d(random.uniform(-.3, .3), random.uniform(-.3, >>> .3), 0), >>> chrono.QuatFromAngleAxis(-chrono.CH_PI/2, >>> chrono.ChVector3d(1,0,0)) >>> ) >>> particles.AddParticle(possys) >>> #particles.EnableCollision(True) >>> system.Add(particles) >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "ProjectChrono" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To view this discussion visit >>> https://groups.google.com/d/msgid/projectchrono/a2929f89-b15a-42f5-a807-c7e7d02ec0edn%40googlegroups.com >>> >>> <https://urldefense.com/v3/__https:/groups.google.com/d/msgid/projectchrono/a2929f89-b15a-42f5-a807-c7e7d02ec0edn*40googlegroups.com?utm_medium=email&utm_source=footer__;JQ!!Mak6IKo!O70Z-enwv3qPCNU5GsB0940X-7u5DtlNMuTw3zW-RVU8aTz_03LgUXyioYkelAHDYjGP2VlV_AMEqe82eWY$> >>> . >>> >> -- >> You received this message because you are subscribed to the Google Groups >> "ProjectChrono" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> >> To view this discussion visit >> https://groups.google.com/d/msgid/projectchrono/0c2e271d-964f-444b-81e5-ceddcb392a48n%40googlegroups.com >> >> <https://urldefense.com/v3/__https://groups.google.com/d/msgid/projectchrono/0c2e271d-964f-444b-81e5-ceddcb392a48n*40googlegroups.com?utm_medium=email&utm_source=footer__;JQ!!Mak6IKo!ITBwK6AoQ7iC2NneNT03ytYMiDYSaYAZrEKJuUflDp6oKyToFy5ZnziS6wqNOxZebNMoYz5M9krJyntp0Cwicg$> >> . >> >> -- > You received this message because you are subscribed to the Google Groups > "ProjectChrono" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > > To view this discussion visit > https://groups.google.com/d/msgid/projectchrono/40557cce-5ebb-4474-a3da-a6dae265872an%40googlegroups.com > > <https://urldefense.com/v3/__https://groups.google.com/d/msgid/projectchrono/40557cce-5ebb-4474-a3da-a6dae265872an*40googlegroups.com?utm_medium=email&utm_source=footer__;JQ!!Mak6IKo!MINBwGaqmVlsNIgD-u_eEGI6M1M7S-NI9JQ_D0QFBo034XutZnFAC87N5M7QKEx_5zzwZcj3gDSXRavzYLUGsg$> > . > > -- You received this message because you are subscribed to the Google Groups "ProjectChrono" group. 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test PLATE.obj
Description: Binary data
