Keeping Physics Objects inside node

Troubleshooting physics
1

This seems a confuse question i guess.



I have a node with 2 geometry, corresponding to an object.



My main character has a character control



[java]control = new CharacterControl(new SphereCollisionShape(0.8f), .9f);

control.setPhysicsLocation(model.getLocalTranslation());

control.setFallSpeed(10f);

masterNode.addControl(control);

control.setPhysicsLocation(new Vector3f(0f, 10f, 0f));[/java]



Now, ive added that node, with 2 geometry into the scene. The character cant get pass thro it.

If i move the node , the object physics keep still in place, so i cant pass the original place the object was.



If i add a RigidBodyControl to the Node, its bounds get too big. If i add to those geometry separated, it works fine however ll have to use setPhyisicsLocation() to move it, and it looks like its a ‘global’ range not inside the node.



I wish i could move the node, and those geometry physics update as the node moves.



Im sorry if i wasnt so clear.



Thanks for the attention !

2

look at TestLocalPhysics

1 Like
3

hmm thanks



so you just have to add the rigid body to the node ? However, how can i get the exact shape of my 2 geometryes so i can make a control with that exact shape ?



I cant batch them together because they have separate data on userData.



Thanks alot for thy attention !

4

Make a compound shape and set it to the node instead of the leafs

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5

Ive searched for CompoundShape, i see that is what i need to do.



However i couldnt manage to it. Will i have to add a control to each Geom separately or only for the node ?



This is the cosest ive reached , but still, it doesnt work (i can get pass thro the object, however i cant get pass thro its leaves… im really confused.



this is the code im using to create the tree

http://code.google.com/p/the-dungeon/source/browse/Epiczz/src/Scenery/Thing/Things/TreeEntity.java



Thanks for the attention normen ! Ur very patient with me ^^

6

make the compound shape (e.g. by using the CollisionShapeFactory with the node) and then attach the control to the node yeah.

7

but the factory doesnt returns me a Compound :frowning: Couldnt find any example code doing this



Im doing with the node but with a normal CollisionShape, how can i get the Compound ? Will i have to create collision for both geometryes and then add to a new compound everytime a tree is created ?



Thanks for the attention.

8

createDynamicMeshShape does return a compound if you use it on a node with geometry children, yes

1 Like
9

Sorry to bother you man, but it didnt work :frowning:



[java]CompoundCollisionShape compound = (CompoundCollisionShape) CollisionShapeFactory.createDynamicMeshShape(getEntityMasterNode());

RigidBodyControl body = new RigidBodyControl(compound, 0);

getEntityMasterNode().addControl(body);[/java]



the masternode is the node witch contains the 2 geometryes



am i missing something ? im very confused about physics.



Thanks for your attention normen, ur the man !



This is the whole tree creation method if you want to take a look



[java]Sphere d = new Sphere(16,16, 1.3f);

Geometry leaves = new Geometry("leaves",d);

leaves.setLocalTranslation(0,6,0);

leaves.setMaterial(Main.getHandler().getAssetManager().loadMaterial("Materials/Leaves.j3m"));

this.getEntityMasterNode().attachChild(leaves);



Cylinder log = new Cylinder(10, 10, 0.4f,6f);

Geometry gLog = new Geometry("log", log);

gLog.setLocalRotation(DumbMath.PITCH090);

gLog.setLocalTranslation(0,2,0);

gLog.setMaterial(Main.getHandler().getAssetManager().loadMaterial("Materials/couro.j3m"));

this.getEntityMasterNode().attachChild(gLog);



CompoundCollisionShape compound = (CompoundCollisionShape) CollisionShapeFactory.createDynamicMeshShape(getEntityMasterNode());

RigidBodyControl body = new RigidBodyControl(compound, 0);

getEntityMasterNode().addControl(body);



Main.getHandler().getSpace().add(getEntityMasterNode());[/java]

10

so i kinda got this working, i was moving the Node itself instead of the physics location, that caused the bug



however i still cant move the tree.



Its bounding area works fine, however if , for example, i rotate the tree in a loop:



[java]rot.fromAngleAxis(speed, Vector3f.UNIT_X);

tree.getControl(RigidBodyControl.class).setPhysicsRotation(rot);[/java]



The bounding areas doesnt rotate as well, so i think im back into the same step i was :confused:



thanks for the attention