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Diffstat (limited to 'examples/ReducedDeformableDemo/ReducedBenchmark.cpp')
-rw-r--r-- | examples/ReducedDeformableDemo/ReducedBenchmark.cpp | 349 |
1 files changed, 349 insertions, 0 deletions
diff --git a/examples/ReducedDeformableDemo/ReducedBenchmark.cpp b/examples/ReducedDeformableDemo/ReducedBenchmark.cpp new file mode 100644 index 000000000..05ddc0362 --- /dev/null +++ b/examples/ReducedDeformableDemo/ReducedBenchmark.cpp @@ -0,0 +1,349 @@ +/* + Bullet Continuous Collision Detection and Physics Library + Copyright (c) 2019 Google Inc. http://bulletphysics.org + This software is provided 'as-is', without any express or implied warranty. + In no event will the authors be held liable for any damages arising from the use of this software. + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it freely, + subject to the following restrictions: + 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. + */ + +#include "ReducedBenchmark.h" +///btBulletDynamicsCommon.h is the main Bullet include file, contains most common include files. +#include "btBulletDynamicsCommon.h" +#include "BulletSoftBody/btDeformableMultiBodyDynamicsWorld.h" +#include "BulletSoftBody/BulletReducedDeformableBody/btReducedDeformableBody.h" +#include "BulletSoftBody/BulletReducedDeformableBody/btReducedDeformableBodyHelpers.h" +#include "BulletSoftBody/BulletReducedDeformableBody/btReducedDeformableBodySolver.h" +#include "BulletSoftBody/btSoftBodyRigidBodyCollisionConfiguration.h" +#include "BulletDynamics/Featherstone/btMultiBodyConstraintSolver.h" +#include "../CommonInterfaces/CommonParameterInterface.h" +#include <stdio.h> //printf debugging + +#include "../CommonInterfaces/CommonDeformableBodyBase.h" +#include "../Utils/b3ResourcePath.h" + +static btScalar damping_alpha = 0.0; +static btScalar damping_beta = 0.0001; +static btScalar COLLIDING_VELOCITY = 0; +static int num_modes = 20; +static bool run_reduced = true; + +class ReducedBenchmark : public CommonDeformableBodyBase +{ + btVector3 m_gravity; +public: + ReducedBenchmark(struct GUIHelperInterface* helper) + : CommonDeformableBodyBase(helper) + { + } + virtual ~ReducedBenchmark() + { + } + void initPhysics(); + + void exitPhysics(); + + // TODO: disable pick force, non-interactive for now. + bool pickBody(const btVector3& rayFromWorld, const btVector3& rayToWorld) { + return false; + } + + void resetCamera() + { + // float dist = 6; + // float pitch = -10; + // float yaw = 90; + // float targetPos[3] = {0, 2, 0}; + float dist = 10; + float pitch = -30; + float yaw = 125; + float targetPos[3] = {0, 2, 0}; + m_guiHelper->resetCamera(dist, yaw, pitch, targetPos[0], targetPos[1], targetPos[2]); + } + + void Ctor_RbUpStack(const btVector3& origin) + { + float mass = 10; + btCollisionShape* shape = new btBoxShape(btVector3(0.5, 0.5, 0.5)); + // btCollisionShape* shape = new btBoxShape(btVector3(1, 1, 1)); + btTransform startTransform; + startTransform.setIdentity(); + // startTransform.setOrigin(btVector3(0, 12, 0)); + // btRigidBody* rb0 = createRigidBody(mass, startTransform, shape); + // rb0->setLinearVelocity(btVector3(0, 0, 0)); + + startTransform.setOrigin(origin); + // startTransform.setRotation(btQuaternion(btVector3(1, 0, 1), SIMD_PI / 4.0)); + btRigidBody* rb1 = createRigidBody(mass, startTransform, shape); + rb1->setActivationState(DISABLE_DEACTIVATION); + // rb1->setLinearVelocity(btVector3(0, 0, 4)); + } + + void createDeform(const btVector3& origin, const btQuaternion& rotation) + { + + if (run_reduced) + { + std::string file_path("../../../data/reduced_torus/"); + std::string vtk_file("torus_mesh.vtk"); + btReducedDeformableBody* rsb = btReducedDeformableBodyHelpers::createReducedDeformableObject( + getDeformableDynamicsWorld()->getWorldInfo(), + file_path, + vtk_file, + num_modes, + false); + + getDeformableDynamicsWorld()->addSoftBody(rsb); + rsb->getCollisionShape()->setMargin(0.01); + // rsb->scale(btVector3(1, 1, 0.5)); + + rsb->setTotalMass(10); + + btTransform init_transform; + init_transform.setIdentity(); + init_transform.setOrigin(origin); + init_transform.setRotation(rotation); + rsb->transformTo(init_transform); + + rsb->setStiffnessScale(5); + rsb->setDamping(damping_alpha, damping_beta); + // rsb->scale(btVector3(0.5, 0.5, 0.5)); + + rsb->m_cfg.kKHR = 1; // collision hardness with kinematic objects + rsb->m_cfg.kCHR = 1; // collision hardness with rigid body + rsb->m_cfg.kDF = 0; + rsb->m_cfg.collisions = btSoftBody::fCollision::SDF_RD; + rsb->m_cfg.collisions |= btSoftBody::fCollision::SDF_RDN; + rsb->m_sleepingThreshold = 0; + btSoftBodyHelpers::generateBoundaryFaces(rsb); + + std::cout << "Running reduced deformable\n"; + } + else // create full deformable cube + { + std::string filepath("../../../data/reduced_torus/"); + std::string filename = filepath + "torus_mesh.vtk"; + btSoftBody* psb = btSoftBodyHelpers::CreateFromVtkFile(getDeformableDynamicsWorld()->getWorldInfo(), filename.c_str()); + + btTransform init_transform; + init_transform.setIdentity(); + init_transform.setOrigin(origin); + init_transform.setRotation(rotation); + psb->transform(init_transform); + psb->getCollisionShape()->setMargin(0.015); + psb->setTotalMass(10); + psb->m_cfg.kKHR = 1; // collision hardness with kinematic objects + psb->m_cfg.kCHR = 1; // collision hardness with rigid body + psb->m_cfg.kDF = .5; + psb->m_cfg.collisions = btSoftBody::fCollision::SDF_RD; + psb->m_cfg.collisions |= btSoftBody::fCollision::SDF_RDN; + getDeformableDynamicsWorld()->addSoftBody(psb); + btSoftBodyHelpers::generateBoundaryFaces(psb); + + btDeformableGravityForce* gravity_force = new btDeformableGravityForce(m_gravity); + getDeformableDynamicsWorld()->addForce(psb, gravity_force); + m_forces.push_back(gravity_force); + + btScalar E = 10000; + btScalar nu = 0.3; + btScalar lambda = E * nu / ((1 + nu) * (1 - 2 * nu)); + btScalar mu = E / (2 * (1 + nu)); + btDeformableNeoHookeanForce* neohookean = new btDeformableNeoHookeanForce(lambda, mu, 0.01); + // neohookean->setPoissonRatio(0.3); + // neohookean->setYoungsModulus(25); + neohookean->setDamping(0.01); + psb->m_cfg.drag = 0.001; + getDeformableDynamicsWorld()->addForce(psb, neohookean); + m_forces.push_back(neohookean); + + std::cout << "Running full deformable\n"; + } + + // btReducedDeformableBody* rsb = btReducedDeformableBodyHelpers::createReducedTorus(getDeformableDynamicsWorld()->getWorldInfo(), num_modes); + + // getDeformableDynamicsWorld()->addSoftBody(rsb); + // rsb->getCollisionShape()->setMargin(0.01); + // // rsb->scale(btVector3(1, 1, 0.5)); + + // rsb->setTotalMass(10); + + // btTransform init_transform; + // init_transform.setIdentity(); + // init_transform.setOrigin(origin); + // init_transform.setRotation(rotation); + // rsb->transformTo(init_transform); + + // rsb->setStiffnessScale(5); + // rsb->setDamping(damping_alpha, damping_beta); + // // rsb->scale(btVector3(0.5, 0.5, 0.5)); + + // rsb->m_cfg.kKHR = 1; // collision hardness with kinematic objects + // rsb->m_cfg.kCHR = 1; // collision hardness with rigid body + // rsb->m_cfg.kDF = 0; + // rsb->m_cfg.collisions = btSoftBody::fCollision::SDF_RD; + // rsb->m_cfg.collisions |= btSoftBody::fCollision::SDF_RDN; + // rsb->m_sleepingThreshold = 0; + // btSoftBodyHelpers::generateBoundaryFaces(rsb); + } + + void stepSimulation(float deltaTime) + { + float internalTimeStep = 1. / 240.f; + m_dynamicsWorld->stepSimulation(deltaTime, 4, internalTimeStep); + } + + virtual void renderScene() + { + CommonDeformableBodyBase::renderScene(); + btDeformableMultiBodyDynamicsWorld* deformableWorld = getDeformableDynamicsWorld(); + + for (int i = 0; i < deformableWorld->getSoftBodyArray().size(); i++) + { + btReducedDeformableBody* rsb = static_cast<btReducedDeformableBody*>(deformableWorld->getSoftBodyArray()[i]); + { + btSoftBodyHelpers::DrawFrame(rsb, deformableWorld->getDebugDrawer()); + btSoftBodyHelpers::Draw(rsb, deformableWorld->getDebugDrawer(), deformableWorld->getDrawFlags()); + } + } + } +}; + +void ReducedBenchmark::initPhysics() +{ + m_guiHelper->setUpAxis(1); + + ///collision configuration contains default setup for memory, collision setup + m_collisionConfiguration = new btSoftBodyRigidBodyCollisionConfiguration(); + + ///use the default collision dispatcher. For parallel processing you can use a diffent dispatcher (see Extras/BulletMultiThreaded) + m_dispatcher = new btCollisionDispatcher(m_collisionConfiguration); + + m_broadphase = new btDbvtBroadphase(); + + if (run_reduced) + { + btReducedDeformableBodySolver* solver = new btReducedDeformableBodySolver(); + + btDeformableMultiBodyConstraintSolver* sol = new btDeformableMultiBodyConstraintSolver(); + sol->setDeformableSolver(solver); + m_solver = sol; + m_dynamicsWorld = new btDeformableMultiBodyDynamicsWorld(m_dispatcher, m_broadphase, sol, m_collisionConfiguration, solver); + } + else + { + btDeformableBodySolver* solver = new btDeformableBodySolver(); + + btDeformableMultiBodyConstraintSolver* sol = new btDeformableMultiBodyConstraintSolver(); + sol->setDeformableSolver(solver); + m_solver = sol; + m_dynamicsWorld = new btDeformableMultiBodyDynamicsWorld(m_dispatcher, m_broadphase, sol, m_collisionConfiguration, solver); + } + + // m_dynamicsWorld = new btDeformableMultiBodyDynamicsWorld(m_dispatcher, m_broadphase, sol, m_collisionConfiguration, solver); + btVector3 gravity = btVector3(0, -10, 0); + m_gravity = gravity; + m_dynamicsWorld->setGravity(gravity); + getDeformableDynamicsWorld()->getWorldInfo().m_gravity = gravity; + m_guiHelper->createPhysicsDebugDrawer(m_dynamicsWorld); + + // 3x3 torus + createDeform(btVector3(4, 4, -4), btQuaternion(SIMD_PI / 2.0, SIMD_PI / 2.0, 0)); + createDeform(btVector3(4, 4, 0), btQuaternion(SIMD_PI / 2.0, SIMD_PI / 2.0, 0)); + createDeform(btVector3(4, 4, 4), btQuaternion(SIMD_PI / 2.0, SIMD_PI / 2.0, 0)); + createDeform(btVector3(0, 4, -4), btQuaternion(SIMD_PI / 2.0, SIMD_PI / 2.0, 0)); + createDeform(btVector3(0, 4, 0), btQuaternion(SIMD_PI / 2.0, SIMD_PI / 2.0, 0)); + createDeform(btVector3(0, 4, 4), btQuaternion(SIMD_PI / 2.0, SIMD_PI / 2.0, 0)); + createDeform(btVector3(-4, 4, -4), btQuaternion(SIMD_PI / 2.0, SIMD_PI / 2.0, 0)); + createDeform(btVector3(-4, 4, 0), btQuaternion(SIMD_PI / 2.0, SIMD_PI / 2.0, 0)); + createDeform(btVector3(-4, 4, 4), btQuaternion(SIMD_PI / 2.0, SIMD_PI / 2.0, 0)); + + // create a static rigid box as the ground + { + // btBoxShape* groundShape = createBoxShape(btVector3(btScalar(50), btScalar(50), btScalar(50))); + btBoxShape* groundShape = createBoxShape(btVector3(btScalar(20), btScalar(2), btScalar(20))); + m_collisionShapes.push_back(groundShape); + + btTransform groundTransform; + groundTransform.setIdentity(); + // groundTransform.setRotation(btQuaternion(btVector3(1, 0, 0), SIMD_PI / 6.0)); + // groundTransform.setRotation(btQuaternion(btVector3(0, 0, 1), SIMD_PI / 6.0)); + groundTransform.setOrigin(btVector3(0, 0, 0)); + // groundTransform.setOrigin(btVector3(0, 0, 6)); + // groundTransform.setOrigin(btVector3(0, -50, 0)); + { + btScalar mass(0.); + createRigidBody(mass, groundTransform, groundShape, btVector4(0,0,0,0)); + } + } + + getDeformableDynamicsWorld()->setImplicit(false); + getDeformableDynamicsWorld()->setLineSearch(false); + getDeformableDynamicsWorld()->setUseProjection(false); + getDeformableDynamicsWorld()->getSolverInfo().m_deformable_erp = 0.2; + getDeformableDynamicsWorld()->getSolverInfo().m_deformable_cfm = 0.2; + getDeformableDynamicsWorld()->getSolverInfo().m_friction = 0.5; + getDeformableDynamicsWorld()->getSolverInfo().m_deformable_maxErrorReduction = btScalar(200); + getDeformableDynamicsWorld()->getSolverInfo().m_leastSquaresResidualThreshold = 1e-3; + getDeformableDynamicsWorld()->getSolverInfo().m_splitImpulse = false; + getDeformableDynamicsWorld()->getSolverInfo().m_numIterations = 100; + + m_guiHelper->autogenerateGraphicsObjects(m_dynamicsWorld); + m_dynamicsWorld->setGravity(gravity); +} + +void ReducedBenchmark::exitPhysics() +{ + //cleanup in the reverse order of creation/initialization + removePickingConstraint(); + //remove the rigidbodies from the dynamics world and delete them + int i; + for (i = m_dynamicsWorld->getNumCollisionObjects() - 1; i >= 0; i--) + { + btCollisionObject* obj = m_dynamicsWorld->getCollisionObjectArray()[i]; + btRigidBody* body = btRigidBody::upcast(obj); + if (body && body->getMotionState()) + { + delete body->getMotionState(); + } + m_dynamicsWorld->removeCollisionObject(obj); + delete obj; + } + // delete forces + for (int j = 0; j < m_forces.size(); j++) + { + btDeformableLagrangianForce* force = m_forces[j]; + delete force; + } + m_forces.clear(); + + //delete collision shapes + for (int j = 0; j < m_collisionShapes.size(); j++) + { + btCollisionShape* shape = m_collisionShapes[j]; + delete shape; + } + m_collisionShapes.clear(); + + delete m_dynamicsWorld; + + delete m_solver; + + delete m_broadphase; + + delete m_dispatcher; + + delete m_collisionConfiguration; +} + + + +class CommonExampleInterface* ReducedBenchmarkCreateFunc(struct CommonExampleOptions& options) +{ + return new ReducedBenchmark(options.m_guiHelper); +} + + |