diff options
Diffstat (limited to 'Client/ThirdParty/Box2D/src/dynamics/b2_fixture.cpp')
-rw-r--r-- | Client/ThirdParty/Box2D/src/dynamics/b2_fixture.cpp | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/Client/ThirdParty/Box2D/src/dynamics/b2_fixture.cpp b/Client/ThirdParty/Box2D/src/dynamics/b2_fixture.cpp new file mode 100644 index 0000000..9fd700a --- /dev/null +++ b/Client/ThirdParty/Box2D/src/dynamics/b2_fixture.cpp @@ -0,0 +1,305 @@ +// MIT License + +// Copyright (c) 2019 Erin Catto + +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: + +// The above copyright notice and this permission notice shall be included in all +// copies or substantial portions of the Software. + +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +// SOFTWARE. + +#include "box2d/b2_fixture.h" +#include "box2d/b2_block_allocator.h" +#include "box2d/b2_broad_phase.h" +#include "box2d/b2_chain_shape.h" +#include "box2d/b2_circle_shape.h" +#include "box2d/b2_collision.h" +#include "box2d/b2_contact.h" +#include "box2d/b2_edge_shape.h" +#include "box2d/b2_polygon_shape.h" +#include "box2d/b2_world.h" + +b2Fixture::b2Fixture() +{ + m_body = nullptr; + m_next = nullptr; + m_proxies = nullptr; + m_proxyCount = 0; + m_shape = nullptr; + m_density = 0.0f; +} + +void b2Fixture::Create(b2BlockAllocator* allocator, b2Body* body, const b2FixtureDef* def) +{ + m_userData = def->userData; + m_friction = def->friction; + m_restitution = def->restitution; + m_restitutionThreshold = def->restitutionThreshold; + + m_body = body; + m_next = nullptr; + + m_filter = def->filter; + + m_isSensor = def->isSensor; + + m_shape = def->shape->Clone(allocator); + + // Reserve proxy space + int32 childCount = m_shape->GetChildCount(); + m_proxies = (b2FixtureProxy*)allocator->Allocate(childCount * sizeof(b2FixtureProxy)); + for (int32 i = 0; i < childCount; ++i) + { + m_proxies[i].fixture = nullptr; + m_proxies[i].proxyId = b2BroadPhase::e_nullProxy; + } + m_proxyCount = 0; + + m_density = def->density; +} + +void b2Fixture::Destroy(b2BlockAllocator* allocator) +{ + // The proxies must be destroyed before calling this. + b2Assert(m_proxyCount == 0); + + // Free the proxy array. + int32 childCount = m_shape->GetChildCount(); + allocator->Free(m_proxies, childCount * sizeof(b2FixtureProxy)); + m_proxies = nullptr; + + // Free the child shape. + switch (m_shape->m_type) + { + case b2Shape::e_circle: + { + b2CircleShape* s = (b2CircleShape*)m_shape; + s->~b2CircleShape(); + allocator->Free(s, sizeof(b2CircleShape)); + } + break; + + case b2Shape::e_edge: + { + b2EdgeShape* s = (b2EdgeShape*)m_shape; + s->~b2EdgeShape(); + allocator->Free(s, sizeof(b2EdgeShape)); + } + break; + + case b2Shape::e_polygon: + { + b2PolygonShape* s = (b2PolygonShape*)m_shape; + s->~b2PolygonShape(); + allocator->Free(s, sizeof(b2PolygonShape)); + } + break; + + case b2Shape::e_chain: + { + b2ChainShape* s = (b2ChainShape*)m_shape; + s->~b2ChainShape(); + allocator->Free(s, sizeof(b2ChainShape)); + } + break; + + default: + b2Assert(false); + break; + } + + m_shape = nullptr; +} + +void b2Fixture::CreateProxies(b2BroadPhase* broadPhase, const b2Transform& xf) +{ + b2Assert(m_proxyCount == 0); + + // Create proxies in the broad-phase. + m_proxyCount = m_shape->GetChildCount(); + + for (int32 i = 0; i < m_proxyCount; ++i) + { + b2FixtureProxy* proxy = m_proxies + i; + m_shape->ComputeAABB(&proxy->aabb, xf, i); + proxy->proxyId = broadPhase->CreateProxy(proxy->aabb, proxy); + proxy->fixture = this; + proxy->childIndex = i; + } +} + +void b2Fixture::DestroyProxies(b2BroadPhase* broadPhase) +{ + // Destroy proxies in the broad-phase. + for (int32 i = 0; i < m_proxyCount; ++i) + { + b2FixtureProxy* proxy = m_proxies + i; + broadPhase->DestroyProxy(proxy->proxyId); + proxy->proxyId = b2BroadPhase::e_nullProxy; + } + + m_proxyCount = 0; +} + +void b2Fixture::Synchronize(b2BroadPhase* broadPhase, const b2Transform& transform1, const b2Transform& transform2) +{ + if (m_proxyCount == 0) + { + return; + } + + for (int32 i = 0; i < m_proxyCount; ++i) + { + b2FixtureProxy* proxy = m_proxies + i; + + // Compute an AABB that covers the swept shape (may miss some rotation effect). + b2AABB aabb1, aabb2; + m_shape->ComputeAABB(&aabb1, transform1, proxy->childIndex); + m_shape->ComputeAABB(&aabb2, transform2, proxy->childIndex); + + proxy->aabb.Combine(aabb1, aabb2); + + b2Vec2 displacement = aabb2.GetCenter() - aabb1.GetCenter(); + + broadPhase->MoveProxy(proxy->proxyId, proxy->aabb, displacement); + } +} + +void b2Fixture::SetFilterData(const b2Filter& filter) +{ + m_filter = filter; + + Refilter(); +} + +void b2Fixture::Refilter() +{ + if (m_body == nullptr) + { + return; + } + + // Flag associated contacts for filtering. + b2ContactEdge* edge = m_body->GetContactList(); + while (edge) + { + b2Contact* contact = edge->contact; + b2Fixture* fixtureA = contact->GetFixtureA(); + b2Fixture* fixtureB = contact->GetFixtureB(); + if (fixtureA == this || fixtureB == this) + { + contact->FlagForFiltering(); + } + + edge = edge->next; + } + + b2World* world = m_body->GetWorld(); + + if (world == nullptr) + { + return; + } + + // Touch each proxy so that new pairs may be created + b2BroadPhase* broadPhase = &world->m_contactManager.m_broadPhase; + for (int32 i = 0; i < m_proxyCount; ++i) + { + broadPhase->TouchProxy(m_proxies[i].proxyId); + } +} + +void b2Fixture::SetSensor(bool sensor) +{ + if (sensor != m_isSensor) + { + m_body->SetAwake(true); + m_isSensor = sensor; + } +} + +void b2Fixture::Dump(int32 bodyIndex) +{ + b2Dump(" b2FixtureDef fd;\n"); + b2Dump(" fd.friction = %.9g;\n", m_friction); + b2Dump(" fd.restitution = %.9g;\n", m_restitution); + b2Dump(" fd.restitutionThreshold = %.9g;\n", m_restitutionThreshold); + b2Dump(" fd.density = %.9g;\n", m_density); + b2Dump(" fd.isSensor = bool(%d);\n", m_isSensor); + b2Dump(" fd.filter.categoryBits = uint16(%d);\n", m_filter.categoryBits); + b2Dump(" fd.filter.maskBits = uint16(%d);\n", m_filter.maskBits); + b2Dump(" fd.filter.groupIndex = int16(%d);\n", m_filter.groupIndex); + + switch (m_shape->m_type) + { + case b2Shape::e_circle: + { + b2CircleShape* s = (b2CircleShape*)m_shape; + b2Dump(" b2CircleShape shape;\n"); + b2Dump(" shape.m_radius = %.9g;\n", s->m_radius); + b2Dump(" shape.m_p.Set(%.9g, %.9g);\n", s->m_p.x, s->m_p.y); + } + break; + + case b2Shape::e_edge: + { + b2EdgeShape* s = (b2EdgeShape*)m_shape; + b2Dump(" b2EdgeShape shape;\n"); + b2Dump(" shape.m_radius = %.9g;\n", s->m_radius); + b2Dump(" shape.m_vertex0.Set(%.9g, %.9g);\n", s->m_vertex0.x, s->m_vertex0.y); + b2Dump(" shape.m_vertex1.Set(%.9g, %.9g);\n", s->m_vertex1.x, s->m_vertex1.y); + b2Dump(" shape.m_vertex2.Set(%.9g, %.9g);\n", s->m_vertex2.x, s->m_vertex2.y); + b2Dump(" shape.m_vertex3.Set(%.9g, %.9g);\n", s->m_vertex3.x, s->m_vertex3.y); + b2Dump(" shape.m_oneSided = bool(%d);\n", s->m_oneSided); + } + break; + + case b2Shape::e_polygon: + { + b2PolygonShape* s = (b2PolygonShape*)m_shape; + b2Dump(" b2PolygonShape shape;\n"); + b2Dump(" b2Vec2 vs[%d];\n", b2_maxPolygonVertices); + for (int32 i = 0; i < s->m_count; ++i) + { + b2Dump(" vs[%d].Set(%.9g, %.9g);\n", i, s->m_vertices[i].x, s->m_vertices[i].y); + } + b2Dump(" shape.Set(vs, %d);\n", s->m_count); + } + break; + + case b2Shape::e_chain: + { + b2ChainShape* s = (b2ChainShape*)m_shape; + b2Dump(" b2ChainShape shape;\n"); + b2Dump(" b2Vec2 vs[%d];\n", s->m_count); + for (int32 i = 0; i < s->m_count; ++i) + { + b2Dump(" vs[%d].Set(%.9g, %.9g);\n", i, s->m_vertices[i].x, s->m_vertices[i].y); + } + b2Dump(" shape.CreateChain(vs, %d);\n", s->m_count); + b2Dump(" shape.m_prevVertex.Set(%.9g, %.9g);\n", s->m_prevVertex.x, s->m_prevVertex.y); + b2Dump(" shape.m_nextVertex.Set(%.9g, %.9g);\n", s->m_nextVertex.x, s->m_nextVertex.y); + } + break; + + default: + return; + } + + b2Dump("\n"); + b2Dump(" fd.shape = &shape;\n"); + b2Dump("\n"); + b2Dump(" bodies[%d]->CreateFixture(&fd);\n", bodyIndex); +} |