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| <li class="toctree-l3"><a class="reference internal" href="manual.html#radius">Radius</a></li> |
| <li class="toctree-l3"><a class="reference internal" href="manual.html#phase">Phase</a></li> |
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| <li class="toctree-l2"><a class="reference internal" href="manual.html#constraints">Constraints</a><ul> |
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| <li class="toctree-l3"><a class="reference internal" href="manual.html#cloth">Cloth</a></li> |
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| <li class="toctree-l3"><a class="reference internal" href="manual.html#relaxation">Relaxation</a></li> |
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| <li class="toctree-l2"><a class="reference internal" href="manual.html#collision">Collision</a><ul> |
| <li class="toctree-l3"><a class="reference internal" href="manual.html#spheres">Spheres</a></li> |
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| <li class="toctree-l3"><a class="reference internal" href="manual.html#triangle-meshes">Triangle Meshes</a></li> |
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| <li class="toctree-l3"><a class="reference internal" href="manual.html#signed-distance-fields">Signed Distance Fields</a></li> |
| <li class="toctree-l3"><a class="reference internal" href="manual.html#planes">Planes</a></li> |
| <li class="toctree-l3"><a class="reference internal" href="manual.html#margins">Margins</a></li> |
| <li class="toctree-l3"><a class="reference internal" href="manual.html#priority">Priority</a></li> |
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| <li class="toctree-l2"><a class="reference internal" href="manual.html#diffuse-particles">Diffuse Particles</a></li> |
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| <li class="toctree-l2"><a class="reference internal" href="manual.html#profiling">Profiling</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="manual.html#limitations-known-issues">Limitations / Known Issues</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="manual.html#acknowledgments">Acknowledgments</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="manual.html#references">References</a></li> |
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| <li class="toctree-l1 current"><a class="current reference internal" href="">Release Notes</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="#id1">1.2.0</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="#id2">1.1.0</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="#id3">1.0.0</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="#id4">0.9.5</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="#id5">0.9.0</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="#id6">0.8.0</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="#id7">0.2.5</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="#id8">0.2.3</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="#id9">0.2.2</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="#id10">0.2.1</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="#id11">0.2.0</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="#id12">0.1.0</a></li> |
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| <div class="section" id="release-notes"> |
| <span id="releasenotes"></span><h1>Release Notes<a class="headerlink" href="#release-notes" title="Permalink to this headline">¶</a></h1> |
| <div class="section" id="id1"> |
| <h2>1.2.0<a class="headerlink" href="#id1" title="Permalink to this headline">¶</a></h2> |
| <ul class="simple"> |
| <li>Improved collision against moving shapes, solver now correctly interpolates shape transforms for substeps</li> |
| <li>Improved Linux support, removed GLUT/GLEW dependencies</li> |
| <li>New API for adding soft-joints (dynamic shape-matching constraints) via. the extensions API, see NvFlexExtCreateSoftJoint()</li> |
| <li>New API to retrieve particle neighbor information, see NvFlexGetNeighbors()</li> |
| <li>New API to support shape collision filtering, collision channels can be assigned to particles and shapes to specify which pairs collide, see NvFlexPhase</li> |
| <li>New API to support per-shape plastic deformation, it is now possible to specify plastic creep and threshold coefficient on a per-shape basis (previous global settings), see NvFlexSetRigids()</li> |
| <li>New API to selectively disable solver features, this can lead to improved performance, see NvFlexFeatureMode, replaces global FlexParams::fluid option</li> |
| <li>New API to allow sub-range particle buffer updates, see NvFlexCopyDesc</li> |
| <li>New API for asynchronous compute, see NvFlexInitDesc</li> |
| <li>New API change, NvFlexUpdateTriangleMesh() now takes vertices with 16-byte stride to remove CPU synchronization step in D3D implementations</li> |
| <li>Fix for NvFlexParams::anisotropyScale, this change improves the fitting of ellipsoids to fluid particle distributions, it should now typically be left at 1.0</li> |
| <li>Fix for NvFlexGetTimers() reporting incorrect values on D3D12</li> |
| <li>Fix for vsync in D3D12</li> |
| <li>Fix for crash when using Flex with NVIDIA driver 384.76</li> |
| <li>Fix for unnecessary synchronization when calling NvFlexMap() on a device buffer</li> |
| <li>Fix numerical precision for shape-matching constraints with large coordinates</li> |
| <li>Fix for uninitialized contact indices returned from NvFlexGetContacts() if NvFlexUpdateSolver() has not been called</li> |
| <li>Fix for SDF collision in D3D12</li> |
| <li>Fix for free after delete in CUDA when using SDFs</li> |
| <li>Fix for D3D warning when using NvFlexSetRigids()</li> |
| <li>Add D3D12 rendering support to the demo</li> |
| <li>Add support for device NvFlexBuffers on D3D</li> |
| <li>Enable NvToolkit profiling zones so to provide annotations in NSight profiles by default, this requires nvToolsExt64_1.dll be present</li> |
| </ul> |
| </div> |
| <div class="section" id="id2"> |
| <h2>1.1.0<a class="headerlink" href="#id2" title="Permalink to this headline">¶</a></h2> |
| <ul class="simple"> |
| <li>New API style, for consistency with other products the API has now an NvFlex prefix and follows a naming convention similar to PhysX</li> |
| <li>Add support for DirectX, in addition to CUDA there is now a cross platform DirectX 11 and 12 version of the Flex libraries that Windows applications can link against</li> |
| <li>Add support for max acceleration clamping, see NvFlexParams::maxAcceleration, can be useful to reduce popping with fast moving kinematic shapes and large interpenetration</li> |
| <li>Add support to querying compute device, see NvFlexGetDeviceName()</li> |
| <li>Add support for flushing compute queue, see NvFlexFlush()</li> |
| <li>Add support for multiple library instances, NvFlexInit() now returns a library which is bound to a single compute device</li> |
| <li>Add support for local space particle simulation, see NvFlexExtMovingFrameInit() and two new local space fluid and cloth demos</li> |
| <li>Add support for CUDA 8.0.44</li> |
| <li>Remove NvFlexError enum, errors will be reported through the NvFlexErrorCallback passed to NvFlexInit()</li> |
| <li>Remove NvFlexMemory enum, users should use the new NvFlexBufferType</li> |
| <li>Fix bug in inflatable constraint solver that could cause some shapes to generate NaNs</li> |
| <li>Fix for SDF contact generation when the particle lies completely outside volume, fixes a problem with ghost contacts</li> |
| <li>Fix for friction being incorrectly applied on trigger shapes</li> |
| <li>Fix for multi-phase fluid cohesion not working correctly, re-enable Rayleigh-Taylor instability test</li> |
| <li>Fix bug with public projects that referenced internal CUDA paths</li> |
| <li>Fix for calling NvFlexSetInflatables() with a count of zero</li> |
| <li>Fix for buoyancy parameter</li> |
| <li>Fix for bug in BVH builder that could cause missed collisions</li> |
| <li>New optional NvFlexDevice library for handling GPU selection and initialization in CUDA</li> |
| <li>New buffer based API, all data must now be passed to Flex through FlexBuffers created through NvFlexAllocBuffer()</li> |
| <li>New stable shape matching code for more robust and efficient soft bodies, removes need for NvFlexParams::inertiaBias</li> |
| <li>New collision shape API supports instancing of convex meshes and a much simplified API, see NvFlexSetShapes()</li> |
| <li>Improvements to collision detection for moving shapes, Flex will now perform a CCD check also taking into account the shape trajectory using the prev/current transforms of each shape</li> |
| </ul> |
| </div> |
| <div class="section" id="id3"> |
| <h2>1.0.0<a class="headerlink" href="#id3" title="Permalink to this headline">¶</a></h2> |
| <ul class="simple"> |
| <li>Added support for reporting collision shape ids, and trigger volume shapes, see flexGetContacts()</li> |
| <li>Optimizations to host code performance</li> |
| <li>Fix for potential memory leak in SDF object destruction</li> |
| <li>Fix for potentially missed collisions during convex shape CCD</li> |
| <li>Fix for incorrect bounds computation during flexSetShapes() (if not specified by user)</li> |
| <li>Fix for initial shape translations being incorrect when using a transform with flexExtCreateInstance()</li> |
| <li>Move flexExt.h header to the /include folder</li> |
| </ul> |
| </div> |
| <div class="section" id="id4"> |
| <h2>0.9.5<a class="headerlink" href="#id4" title="Permalink to this headline">¶</a></h2> |
| <ul class="simple"> |
| <li>Fix for NaNs being generated during shape matching with plastic deformation enabled</li> |
| <li>Fix for bug that could lead to translational drifting of shape matched rigid bodies</li> |
| <li>Fix for incorrect interaction of restitution and friction when using the collision margin parameters</li> |
| <li>New geometry instancing API for specifying collision shapes, adds support for transformed triangle meshes and signed distance fields, see flexSetShapes()</li> |
| <li>New BVH based collision detection improves performance for scenes with large triangle meshes</li> |
| <li>New mesh tearing API, see flexExtTearClothMesh()</li> |
| <li>New CCD collision detection for particle versus convex shape, helps reduce tunneling with thin convexes</li> |
| <li>Performance improvements for soft body cooking times in flexExtCreateSoftFromMesh()</li> |
| <li>Exposed intertial bias for shape matching constraints, see FlexParams::mInertiaBias</li> |
| <li>Exposed parameter to control the lifetime of diffuse particles, see FlexParams::mDiffuseLifetime</li> |
| </ul> |
| </div> |
| <div class="section" id="id5"> |
| <h2>0.9.0<a class="headerlink" href="#id5" title="Permalink to this headline">¶</a></h2> |
| <ul class="simple"> |
| <li>Added support for soft bodies, particles can now belong to multiple shape-matching clusters used to drive linear blend skinning</li> |
| <li>Added support for particle rest positions that can be used to filter collisions between particles that touch in their rest pose, see flexSetRestPositions()</li> |
| <li>Added support for spheres and capsules as collision shapes, renamed flexSetConvexes() to flexSetShapes()</li> |
| <li>Added support for user callbacks, these can be used to implement custom constraints, force fields, etc. See flexRegisterSolverCallback()</li> |
| <li>Added support for the NVIDIA control panel, Flex will now use the selected PhysX device if desired, see flexInit() for details</li> |
| <li>Added support for Android platforms</li> |
| <li>Added flexGetParams() method to retrieve default values and set defaults to sensible values</li> |
| <li>Improved shape-matching algorithm with better inversion handling</li> |
| <li>Optimizations for flexSetTriangles(), users can now pass the triangle bounds to avoid having them re-calculated explicitly</li> |
| <li>Rigid constraints now use quaternions as their orientation representation, see flexSetRigids() and flexGetRigidTransforms()</li> |
| <li>Exposed anisotropy min/max clamping for better control of particle fluid rendering, see FlexParams::mAnisotropyMin and FlexParams::mAnisotropyMax</li> |
| <li>Fix for smooth particles not being generated if anisotropy was not enabled</li> |
| <li>Fix for demo mouse picking</li> |
| <li>Fix for flexGetContacts() returning incorrect values, added contact visualization to the demo app</li> |
| <li>Fix for bug in flexGetBounds() which meant it could return bounds with one frame delay, users should now synchronize the flexGetBounds() call like other query methods</li> |
| <li>Fix whitespace on flex.h to play nice with Github’s code view</li> |
| <li>Fix for triangle mesh collision when particle moves in the plane of the triangle incorrectly reporting contact</li> |
| <li>Fix leak when destroying solver</li> |
| <li>Fix for incomplete initialization of FlexExtAssets in the extension creation methods</li> |
| <li>Rename FlexParams::mMaxVelocity -> FlexParams::mMaxSpeed</li> |
| </ul> |
| </div> |
| <div class="section" id="id6"> |
| <h2>0.8.0<a class="headerlink" href="#id6" title="Permalink to this headline">¶</a></h2> |
| <ul class="simple"> |
| <li>Upgrade to CUDA 7.0</li> |
| <li>Linux binaries are now compiled with -fPIC</li> |
| <li>Fix for extensions library not writing velocities correctly</li> |
| <li>Fix for memory leak when using moving convex shapes</li> |
| <li>Optimizations for inflatable constraints to reduce number of kernel launches</li> |
| <li>Added option to control the max number of neighbors stored per-particle, this can reduce memory usage, see flexCreateSolver()</li> |
| </ul> |
| </div> |
| <div class="section" id="id7"> |
| <h2>0.2.5<a class="headerlink" href="#id7" title="Permalink to this headline">¶</a></h2> |
| <ul class="simple"> |
| <li>Fix for vertex normal calculation when using sparse active particle set</li> |
| <li>Fix for division by zero in rest density calculation when fluid rest distance was 0.0</li> |
| <li>Fix for infinite mass particles being moved by kinematic objects</li> |
| <li>Added CUDA force fields to extensions library, see flexExtSetForceFields()</li> |
| <li>Added particle contact reporting API, see flexGetContacts()</li> |
| <li>Added early out to avoid Laplacian smoothing and anisotropy calculation if not using them</li> |
| <li>Added global damping parameter to model viscous drag on particles (not just cloth), see FlexParams::mDamping</li> |
| <li>Added user manual in pdf and chm formats</li> |
| <li>Made enum names consistent, eFlexHost -> eFlexMemoryHost</li> |
| <li>Upgraded to CUB 1.3.2</li> |
| <li>Extended particle phase parameters to allow fine grained control over self-collision and fluid properties, see flexMakePhase()</li> |
| </ul> |
| </div> |
| <div class="section" id="id8"> |
| <h2>0.2.3<a class="headerlink" href="#id8" title="Permalink to this headline">¶</a></h2> |
| <ul class="simple"> |
| <li>Switched to bindless textures, 50% reduction in CPU usage, because of this change Flex now requires an SM3.0 or above GPU</li> |
| <li>Optimized convex grid rasterization by assigning 4 warps/shape, reduces time from 1ms->0.25ms for large shapes</li> |
| <li>Added error mesasge callback, see flexInit()</li> |
| <li>Added flexSetFence()/flexWaitFence() for more fine grained synchronization with Flex GPU work, flexSynchronize() has been removed</li> |
| <li>Added static/dynamic flags for convex shapes to allow prioritising static contacts over dynamic, can be useful to prevent tunnelling through thin shapes</li> |
| <li>Added local/global relaxation to improve convergence for some scenes (see FlexParams::eRelaxationMode)</li> |
| <li>Removed flexGetVorticities(), allows optimizations for vorticity confinement calculation</li> |
| <li>Fix for flexSetSprings(), flexSetTriangles(), and flexSetConvexes() reallocing more often than necessary</li> |
| <li>Fix for flexGetDensities(), and flexGetAnisotropy() not returning the full particle array if using sparse active set</li> |
| <li>Fix for memory leak when instance creation fails in flexExtCreateInstance()</li> |
| <li>Fix for memory leak when setting rigid bodies multiple times</li> |
| <li>Fix for potential GPU crash when using plastic deformation on rigid bodies</li> |
| <li>Smooth vertex normals are now computed for particles belonging to dynamic triangles (cloth), they can be retrieved via flexGetNormals()</li> |
| <li>Optimized CompactObjects in flexExtPushToDevice()</li> |
| <li>Made headers compile with /W4 on MSVC</li> |
| <li>Added debug capture functionality</li> |
| </ul> |
| </div> |
| <div class="section" id="id9"> |
| <h2>0.2.2<a class="headerlink" href="#id9" title="Permalink to this headline">¶</a></h2> |
| <ul class="simple"> |
| <li>Fix for infinite mass particles gaining velocity during collisions</li> |
| <li>Fix bug with planar triangle mesh rasterization</li> |
| <li>Fix for zero-length distance constraints</li> |
| <li>Fix cloth drag and lift causing instability at high velocities</li> |
| <li>Fix for convex grid perf. when there is a single large convex body</li> |
| <li>Improved behaviour when particles are overconstrained (constraint averaging), can reduce jitter for pinned cloth</li> |
| <li>Improved adhesion behaviour for fluids against solids</li> |
| <li>Improved restitution behavior</li> |
| <li>Improved fluid rendering performance by using a smaller bilateral filter kernel</li> |
| <li>Change particle friction to be an absolute parameter instead of a multiplier on dynamic friction</li> |
| <li>Change sort to use async device-device memcpys to avoid stalling host</li> |
| <li>Exposed new parameter to control collision margin against shapes see FlexParams::mShapeCollisionMargin</li> |
| <li>Warning fixes for Linux and Windows</li> |
| <li>Fix z-precision rendering issues in demo</li> |
| <li>Added “Ext” prefix to extensions types</li> |
| <li>Clamp particle velocity to maximum user velocity before prediction step, improves behaviour when interacting with force fields</li> |
| </ul> |
| </div> |
| <div class="section" id="id10"> |
| <h2>0.2.1<a class="headerlink" href="#id10" title="Permalink to this headline">¶</a></h2> |
| <ul class="simple"> |
| <li>Add support for lower dimensional particle rigid bodies (rods, planes)</li> |
| <li>Allow specifying rigid rotations through the solver API</li> |
| <li>Allow separate control of fluid and solid rest distances</li> |
| <li>Add GUI to demo</li> |
| </ul> |
| </div> |
| <div class="section" id="id11"> |
| <h2>0.2.0<a class="headerlink" href="#id11" title="Permalink to this headline">¶</a></h2> |
| <ul class="simple"> |
| <li>Fix for rest density calculation when number of neighbors > than max</li> |
| <li>Add support for async memory copies back to pinned host memory</li> |
| <li>Add functions to allocate pinned host memory, see flexAlloc()</li> |
| <li>Add rigid body support to FlexExtensions</li> |
| <li>Add rigid body SDF collision support</li> |
| <li>Add position level friction</li> |
| <li>Static triangle grid now created on the GPU, see flexSetTriangles</li> |
| <li>Unify triangle collision with rest of the pipline</li> |
| <li>Exposed a new parameter to run a second collision pass against triangle meshes, see FlexParam::mEnableCCD</li> |
| <li>Optimized rigid body solve using CUB parallel reductions</li> |
| <li>Fix for solve springs when some particles have infinite mass</li> |
| <li>Reduce allocations in flexSetConvexes</li> |
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| <div class="section" id="id12"> |
| <h2>0.1.0<a class="headerlink" href="#id12" title="Permalink to this headline">¶</a></h2> |
| <p>Initial release</p> |
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