Objects collides when it shouldn't

[nathanf534]

I have a spaceship that I am shooting a laser from. Both the laser and the ship are collidable. When I shoot the laser, it hits the spaceship as it is leaving, even if I place the laser significantly far away (80 units) when it is fired. Hopefully there is something simple I am missing, such as telling the engine to update some position, or something along those lines. Here is my code. I am using Irrlicht with newton.

First, I call addLaser, giving a location 80 units in front of the spaceship.

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weaponManager->addLaser(dummy->getAbsolutePosition()+vector3df(0,0,80));

The addLaser method calls a method in my physics manager to create the Cylinder collision object, and creates a matrix to rotate the cylinder 90 degrees, to match the laser.

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matrix4* offset = new matrix4;
   offset->setRotationDegrees(vector3df(0,90,0));
   physicsManager->addCylinderBody(1,20,offset,0,laser);

and here is where I create the cylinder body. I call the NewtonBodySetMatrix to move the cylinder collision past the spaceship before Newton does any collision calculations, so I'm not sure why it is still colliding.

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void PhysicsManager::addCylinderBody(float radius,float height,matrix4* offset,int id,ISceneNode* node){
   NewtonCollision* collision =NewtonCreateCylinder(nWorld,radius,height,id,&offset->M[0]);
   NewtonBody* body=NewtonCreateBody(nWorld,collision);
   matrix4 mat=node->getAbsoluteTransformation();
   NewtonBodySetMatrix(body, &mat.M[0]);
   NewtonBodySetMassMatrix(body,1,10,10,10);
   NewtonBodySetForceAndTorqueCallback(body,ApplyForceAndTorqueEvent);
   NewtonBodySetTransformCallback(body,callbackTransform);
}

Edit: if I increase the distance from 80 to 200, it doesn't collide with it anymore, but then the laser is almost out of view where it starts, that can't be right.

[nathanf534]

ahh, actually I just figured it out. The transformation matrix of my laser includes a scale that I added, so the cylinder collision is 10 times larger than it should be.

Stupid bugs, sorry for bothering... again.

[Julio Jerez]

These are my favorite kind of bugs, they fix themself.