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| function resize_and_copy!(callback, semi, v_ode, u_ode, _v_cache, _u_cache) | ||
| # Get non-`resize!`d ranges | ||
| callback.ranges_v_cache, callback.ranges_u_cache = ranges_vu(semi.systems) | ||
| callback.eachparticle_cache = Tuple(get_iterator(system) for system in semi.systems) | ||
| callback.nparticles_cache = Tuple(n_moving_particles(system) for system in semi.systems) | ||
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| # Resize all systems | ||
| foreach_system(semi) do system | ||
| resize_system!(system) | ||
| end | ||
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| # Set `resize!`d ranges | ||
| ranges_v_tmp, ranges_u_tmp = ranges_vu(semi.systems) | ||
| for i in 1:length(semi.systems) | ||
| semi.ranges_v[i][1] = ranges_v_tmp[i][1] | ||
| semi.ranges_u[i][1] = ranges_u_tmp[i][1] | ||
| end | ||
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| sizes_v = (v_nvariables(system) * n_moving_particles(system) for system in semi.systems) | ||
| sizes_u = (u_nvariables(system) * n_moving_particles(system) for system in semi.systems) | ||
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| # Resize integrated values | ||
| resize!(v_ode, sum(sizes_v)) | ||
| resize!(u_ode, sum(sizes_u)) | ||
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| # Preserve non-changing values | ||
| foreach_system(semi) do system | ||
| v = wrap_v(v_ode, system, semi) | ||
| u = wrap_u(u_ode, system, semi) | ||
| _v = _wrap_v(_v_cache, system, semi, callback) | ||
| _u = _wrap_u(_u_cache, system, semi, callback) | ||
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| copy_values_v!(v, _v, system, semi, callback) | ||
| copy_values_u!(u, _u, system, semi, callback) | ||
| end | ||
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| return callback | ||
| end | ||
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| @inline resize_system!(system) = system | ||
| @inline resize_system!(system::FluidSystem) = resize_system!(system, | ||
| system.particle_refinement) | ||
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| @inline resize_system!(system::FluidSystem, ::Nothing) = system | ||
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| @inline function resize_system!(system::FluidSystem, | ||
| particle_refinement::ParticleRefinement) | ||
| (; system_child, candidates) = particle_refinement | ||
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| candidates_refine = length(candidates) | ||
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| if candidates_refine != 0 || candidates_coarsen != 0 | ||
| n_new_child = candidates_refine * nchilds(system, particle_refinement) | ||
| capacity_parent = nparticles(system) - candidates_refine | ||
| capacity_child = nparticles(system_child) + n_new_child | ||
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| capacity_parent <= 0 && error("`RefinementCriteria` affects all particles") | ||
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| # Resize child system (extending) | ||
| resize_system!(system_child, capacity_child) | ||
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| # Resize parent system (reducing) | ||
| resize_system!(system, capacity_parent) | ||
| end | ||
| end | ||
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| function resize_system!(system::WeaklyCompressibleSPHSystem, capacity::Int) | ||
| (; mass, pressure, cache, density_calculator) = system | ||
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| resize!(mass, capacity) | ||
| resize!(pressure, capacity) | ||
| resize_cache!(cache, capacity, density_calculator) | ||
| end | ||
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| function resize_system!(system::EntropicallyDampedSPHSystem, capacity::Int) | ||
| (; mass, cache, density_calculator) = system | ||
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| resize!(mass, capacity) | ||
| resize_cache!(cache, capacity, density_calculator) | ||
| end | ||
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| resize_cache!(cache, capacity::Int, ::SummationDensity) = resize!(cache.density, capacity) | ||
| resize_cache!(cache, capacity::Int, ::ContinuityDensity) = cache | ||
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| @inline function _wrap_u(_u_cache, system, semi, callback) | ||
| (; ranges_u_cache, nparticles_cache) = callback | ||
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| range = ranges_u_cache[system_indices(system, semi)][1] | ||
| n_particles = nparticles_cache[system_indices(system, semi)] | ||
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| @boundscheck @assert length(range) == u_nvariables(system) * n_particles | ||
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| # This is a non-allocating version of: | ||
| # return unsafe_wrap(Array{eltype(_u_cache), 2}, pointer(view(_u_cache, range)), | ||
| # (u_nvariables(system), n_particles)) | ||
| return PtrArray(pointer(view(_u_cache, range)), | ||
| (StaticInt(u_nvariables(system)), n_particles)) | ||
| end | ||
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| @inline function _wrap_v(_v_cache, system, semi, callback) | ||
| (; ranges_v_cache, nparticles_cache) = callback | ||
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| range = ranges_v_cache[system_indices(system, semi)][1] | ||
| n_particles = nparticles_cache[system_indices(system, semi)] | ||
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| @boundscheck @assert length(range) == v_nvariables(system) * n_particles | ||
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| # This is a non-allocating version of: | ||
| # return unsafe_wrap(Array{eltype(_v_cache), 2}, pointer(view(_v_cache, range)), | ||
| # (v_nvariables(system), n_particles)) | ||
| return PtrArray(pointer(view(_v_cache, range)), | ||
| (StaticInt(v_nvariables(system)), n_particles)) | ||
| end | ||
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| function copy_values_v!(v_new, v_old, system, semi, callback) | ||
| (; eachparticle_cache) = callback | ||
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| # Copy only unrefined particles | ||
| new_particle_id = 1 | ||
| for particle in eachparticle_cache[system_indices(system, semi)] | ||
| for i in 1:v_nvariables(system) | ||
| v_new[i, new_particle_id] = v_old[i, particle] | ||
| end | ||
| new_particle_id += 1 | ||
| end | ||
| end | ||
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| function copy_values_u!(u_new, u_old, system, semi, callback) | ||
| (; eachparticle_cache) = callback | ||
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| # Copy only unrefined particles | ||
| new_particle_id = 1 | ||
| for particle in eachparticle_cache[system_indices(system, semi)] | ||
| for i in 1:u_nvariables(system) | ||
| u_new[i, new_particle_id] = u_old[i, particle] | ||
| end | ||
| new_particle_id += 1 | ||
| end | ||
| end | ||
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| @inline get_iterator(system) = eachparticle(system) | ||
| @inline get_iterator(system::FluidSystem) = get_iterator(system, system.particle_refinement) | ||
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| @inline get_iterator(system::FluidSystem, ::Nothing) = eachparticle(system) | ||
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| @inline function get_iterator(system::FluidSystem, | ||
| particle_refinement::ParticleRefinement) | ||
| (; candidates) = particle_refinement | ||
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| # Filter candidates | ||
| # Uncomment for benchmark | ||
| # return Iterators.filter(i -> !(i in candidates), eachparticle(system)) | ||
| return setdiff(eachparticle(system), candidates) | ||
| end |