Frustum Culling

[Patrizio]

hi to all,
i got a question, but can't find the answer.
i'd like to use NewtonSceneProxy to perform frustum culling, and the AABB tree of the broadphase to get a good candidate for occlusion culling, but seems like NewtonSceneProxy has been removed..

so what to use to get similar behaviour?

ps: great engine

[Julio Jerez]

the newer collision system supports all the fumtionality off all versions stating from newton 1.00
and much more.

NewtonSceneProxy sounds like an old fumtionality from the time Newton collision system was not instance based.
can you tell me what was doing and maybe I can tell how to use the equivalent functionality?

[Patrizio]

Of course and thankss for the fast answer

It was a way to use a newtoncollision object for getting collisions without the need of having a corresponding newtonBody(that as you stated here would have been too slow).
http://www.newtondynamics.com/forum/viewtopic.php?f=9&t=6629#p46590

[Julio Jerez]

Oh I see, the scene collision is in the engine, the only difference is that that instead of using a special objects, now use a collision shape.

basically you make a scene collision and you add all you proxy as collision shape using function

Code: Select all

NewtonSceneCollisionBeginAddRemove (NewtonCollision* const sceneCollision);   
// add or remove some shapes,
void* NewtonSceneCollisionAddSubCollision (NewtonCollision* const sceneCollision, const NewtonCollision* const collision);   
// end begin add section
NewtonSceneCollisionEndAddRemove (NewtonCollision* const sceneCollision);   


you can move the shape at will using functions:

Code: Select all

NewtonSceneCollisionBeginAddRemove (NewtonCollision* const sceneCollision);   
// modify one or more shapes using function
void NewtonSceneCollisionSetSubCollisionMatrix (NewtonCollision* const sceneCollision, const void* const collisionNode, const dFloat* const matrix);   
// end begin add section
NewtonSceneCollisionEndAddRemove (NewtonCollision* const sceneCollision);   


to get contacts you can use function

Code: Select all

NewtonCollision* NewtonSceneCollisionGetCollisionFromNode (NewtonCollision* const sceneCollision, const void* const collisionNode);
int NewtonWorldCollide (const NewtonWorld* const newtonWorld, const dFloat* const matrix, const NewtonCollision* const shape, void* const userData, NewtonWorldRayPrefilterCallback prefilter, NewtonWorldConvexCastReturnInfo* const info, int maxContactsCount, int threadIndex);


look a the SceneCollision functions

[Patrizio]

Perfect, thanks for all

Im making An engine and this Will really help me