hey im having a bit of a "delay" in setting up some collision in my opengl/sfml game. its not much of an error, just asking for some help. Im using Bullet Physics(this is the API reference) and i have been looking at the different functions and classes. then i noticed that there are demos included in the lbrary, so while looking them over i dont completely understand them..
the main library that they recommend me use is CollisionInterfaceDemo since i have already used GLM for models in opengl, and sfml for 2D purposes and the window.
im just wondering if anyone knows how i would be able to implement collision in my game.
Not sure if this is what you're after, but this is my setup code for basic rigid body physics:
#include "btBulletDynamicsCommon.h"
...
m_pBroadphase = new btDbvtBroadphase();
m_pCollisionConfig = new btDefaultCollisionConfiguration();
m_pCollisionDispatcher = new btCollisionDispatcher(m_pCollisionConfig);
m_pSolver = new btSequentialImpulseConstraintSolver();
m_pDynamicsWorld = new btDiscreteDynamicsWorld(m_pCollisionDispatcher,
m_pBroadphase,
m_pSolver,
m_pCollisionConfig);
After that it's just a matter of adding bodies to the world...
btRigidBody::btRigidBodyConstructionInfo info;
// set physical properties like mass, coefficient of restitution etc
info.m_mass = 10;
info.m_restitution = 0.5;
...
// Use a motion state to link the physics body with the graphics object.
// This is the glue between Bullet and your code, called by bullet to update the
// position & orientation of the object
info.m_motionState = new YourCustomMotionState(...) ;
btRigidBody* pRigidBody = new btRigidBody(info);
m_pDynamicsWorld->addRigidBody(pRigidBody);
...and then updating the world state every frame.
m_pDynamicsWorld->stepSimulation(deltaTime, m_maxSubSteps);
That will give you a simple physics simulation with rigid bodies that collide and bounce off each other, with Bullet in control of the way bodies move.