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Make PhysicsWorld::createIslands() method faster

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This commit is contained in:
Daniel Chappuis 2020-07-02 23:44:27 +02:00
parent 56ad6536ba
commit 5cf8cb7445
1 changed files with 15 additions and 5 deletions
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20
src/engine/PhysicsWorld.cpp
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@ -759,6 +759,9 @@ void PhysicsWorld::createIslands() {
// Create a stack for the bodies to visit during the Depth First Search // Create a stack for the bodies to visit during the Depth First Search
Stack<Entity> bodyEntityIndicesToVisit(mMemoryManager.getSingleFrameAllocator()); Stack<Entity> bodyEntityIndicesToVisit(mMemoryManager.getSingleFrameAllocator());
// List of static bodies added to the current island (used to reset the isAlreadyInIsland variable of static bodies)
List<Entity> staticBodiesAddedToIsland(mMemoryManager.getSingleFrameAllocator());
uint nbTotalManifolds = 0; uint nbTotalManifolds = 0;
// For each rigid body component // For each rigid body component
@ -795,7 +798,13 @@ void PhysicsWorld::createIslands() {
rigidBodyToVisit->setIsSleeping(false); rigidBodyToVisit->setIsSleeping(false);
// If the current body is static, we do not want to perform the DFS search across that body // If the current body is static, we do not want to perform the DFS search across that body
if (rigidBodyToVisit->getType() == BodyType::STATIC) continue; if (rigidBodyToVisit->getType() == BodyType::STATIC) {
staticBodiesAddedToIsland.add(bodyToVisitEntity);
// Go to the next body
continue;
}
// If the body is involved in contacts with other bodies // If the body is involved in contacts with other bodies
auto itBodyContactPairs = mCollisionDetection.mMapBodyToContactPairs.find(bodyToVisitEntity); auto itBodyContactPairs = mCollisionDetection.mMapBodyToContactPairs.find(bodyToVisitEntity);
@ -863,12 +872,13 @@ void PhysicsWorld::createIslands() {
// Reset the isAlreadyIsland variable of the static bodies so that they // Reset the isAlreadyIsland variable of the static bodies so that they
// can also be included in the other islands // can also be included in the other islands
for (uint j=0; j < mRigidBodyComponents.getNbEnabledComponents(); j++) { for (uint j=0; j < staticBodiesAddedToIsland.size(); j++) {
if (mRigidBodyComponents.mBodyTypes[j] == BodyType::STATIC) { assert(mRigidBodyComponents.getBodyType(staticBodiesAddedToIsland[j]) == BodyType::STATIC);
mRigidBodyComponents.mIsAlreadyInIsland[j] = false; mRigidBodyComponents.setIsAlreadyInIsland(staticBodiesAddedToIsland[j], false);
}
} }
staticBodiesAddedToIsland.clear();
} }
mCollisionDetection.mMapBodyToContactPairs.clear(true); mCollisionDetection.mMapBodyToContactPairs.clear(true);