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littleminelittlemine
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necessary assets
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‎LevelSets/bowl.vdb

573 KB
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‎LevelSets/sphere.vdb

810 KB
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‎MpmParticles/particles-1000k.dat

12.4 MB
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‎Regression/cloth.lua

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-- mpm 3f
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math.randomseed(123)
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output = "output/cloth"
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end_frame = 10
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dx = 0.2
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cloth_dx = 0.2
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gravity = TV.create({0, -3,0})
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max_dt = 0.001
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apic_rpic_ratio = 0.2
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cfl = 0.3
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element_partitions = 16
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quasistatic = false
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symplectic = true
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matrix_free = true
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verbose = false
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run_diff_test = false
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write_meshes = false
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write_partio = false
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use_bending = false
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bending_Youngs = 6e-4
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Youngs = 400
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nu = 0.3
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rho = 2
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cloth_k = 800
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cloth_gamma = 0
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cloth_friction_angle = 0
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cloth_damage = 999999
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function initialize(frame)
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create_cloth(TV.create({0, 0,0}))
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-- pinner
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local sphere_center = TV.create({-1, 0.5,-0.5})
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local sphere = Sphere.new(sphere_center, 0.1)
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local sphere_object = AnalyticCollisionObject.new(sphere, STICKY)
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mpm:addAnalyticCollisionObject(sphere_object)
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local sphere_center = TV.create({-1, 0.5,0.5})
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local sphere = Sphere.new(sphere_center, 0.1)
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local sphere_object = AnalyticCollisionObject.new(sphere, STICKY)
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mpm:addAnalyticCollisionObject(sphere_object)
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-- bullet
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local sphere_center = TV.create({-0.8, 0 ,0})
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local sphere = Sphere.new(sphere_center, 0.25)
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local sphere_object = AnalyticCollisionObject.new(sphere, SEPARATE)
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mpm:addAnalyticCollisionObject(sphere_object)
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-- bullet2
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local sphere_center = TV.create({2.5, 0 ,0})
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local sphere = Sphere.new(sphere_center, 0.25)
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local sphere_object = AnalyticCollisionObject.new(sphere, SEPARATE)
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mpm:addAnalyticCollisionObject(sphere_object)
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local ground_origin = TV.create({0,0,0})
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local ground_normal = TV.create({0,1,0})
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local ground_ls = HalfSpace.new(ground_origin, ground_normal)
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local ground_object = AnalyticCollisionObject.new(ground_ls, SEPARATE)
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ground_object:setFriction(0.1)
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mpm:addAnalyticCollisionObject(ground_object)
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end
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function create_cloth(t)
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local transform = t;
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function cloth(index, mass, X, V)
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X[1], X[2] = -X[2], X[1]
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X[0] = X[0] - 1
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X[1] = X[1] + 0.5
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X[2] = X[2] - 0.5
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X:set(X + transform)
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end
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local mesh = scene:createTriMesh(constructUnitSquare)
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local deformable = scene:addDeformableTriMesh(mesh)
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deformable:transform(cloth)
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local meshed_particles_handle = mpm:makeParticleHandle(deformable, 1)
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local thickness = 0.001
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local quadrature_count = 1
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local quadrature_particles_handle = mpm:sampleTriParticles(deformable, thickness, rho, quadrature_count)
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local m = QRCloth3D.new(Youngs,nu, cloth_k, cloth_gamma)
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quadrature_particles_handle:addFBasedMpmForce(m)
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local py = ClothYield.new(cloth_friction_angle, cloth_damage)
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quadrature_particles_handle:addPlasticity(m,py,"cotangent")
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if(use_bending==true) then
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local bending_mesh = mpm:addBendingSpringsForTriangles(deformable)
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local bending_deformable = scene:addDeformableSegMesh(bending_mesh)
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local m_bending = CorotatedCodimensional1.new(bending_Youngs,0.3)
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bending_deformable:addFemHyperelasticForce(m_bending)
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end
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end
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function constructUnitSquare(mesh, X)
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local z = TV2.create({0, 0})
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local cells = IntV2.create({2/cloth_dx, 1/cloth_dx})
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local grid = Grid2d.new(cells, cloth_dx , z);
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construct2dMattressMesh(grid, mesh, X)
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end

‎Regression/cloth_restart_10.dat

42.9 KB
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‎Regression/mattress.lua

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output = "output/mattress"
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end_frame = 10
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E = 100
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rho = 1
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nu = 0.3
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m = 10
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gravity = TV.create({0, -9.8, 0})
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max_dt = 0.004
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newton_iterations = 100
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function initialize(frame)
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local mesh = scene:createTetMesh(constructUnitBox)
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local deformable = scene:addDeformableTetMesh(mesh)
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deformable:setMassFromDensity(rho)
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local m = Corotated.new(E,nu)
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deformable:addFemHyperelasticForce(m)
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scene:setBoundaryConditions(left_side)
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end
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function constructUnitBox(mesh, X)
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local z = TV.create({0, 0, 0})
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local cells = IntV.create({m, m, m})
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local grid = Grid3d.new(cells, 1/m, z);
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construct3dMattressMesh(grid, mesh, X)
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end
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function left_side(dof, X)
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return X[0] < 1e-9
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end

‎Regression/mattress_restart_10.dat

1.57 MB
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‎SegMesh/knot1.poly

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POLYS
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1: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177
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END

‎TetMesh/cube.vtk

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# vtk DataFile Version 2.0
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Unstructured Grid
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ASCII
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DATASET UNSTRUCTURED_GRID
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POINTS 8 double
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0 0 0
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1 0 0
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1 0 1
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0 0 1
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0 1 0
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1 1 0
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1 1 1
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0 1 1
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CELLS 6 30
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4 0 4 6 5
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4 3 6 2 0
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4 0 4 7 6
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4 3 6 0 7
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4 2 0 6 1
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4 6 0 5 1
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CELL_TYPES 6
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10
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10
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10
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10
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10
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10

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