Here's some sample code of how to get and deal with contact data:
#include "DarkGDK.h"
#include "FulcrumPhy.h"
void checkCollisions();
int groundID = 1;
int sphere1ID = 2;
int sphere2ID = 3;
FulcrumPhy myPhysics;
void DarkGDK ( void )
{
myPhysics.start();
myPhysics.setGravity(0, -9.8, 0);
dbSyncOn ( );
dbSyncRate ( 30 );
dbAutoCamOff();
dbPositionCamera(0, 10, -40);
// Make Objects
dbMakeObjectBox(groundID, 100, 10, 100);
dbColorObject(groundID, dbRGB(dbRND(255), dbRND(255), dbRND(150)));
dbMakeObjectSphere(sphere1ID, 5, 20, 20);
dbColorObject(sphere1ID, dbRGB(dbRND(255), dbRND(150), dbRND(255)));
dbPositionObject(sphere1ID, 0, 30, 0);
dbMakeObjectSphere(sphere2ID, 5, 20, 20);
dbColorObject(sphere2ID, dbRGB(dbRND(150), dbRND(255), dbRND(255)));
dbPositionObject(sphere2ID, 10, 35, 0);
// Make Actors
myPhysics.makeBox(groundID);
myPhysics.makeSphere(sphere1ID, true);
myPhysics.makeSphere(sphere2ID, true);
// Any two actors/objects we want to check collisions for must be
// set as contact pairs
myPhysics.setContactPair(groundID, sphere1ID);
myPhysics.setContactPair(groundID, sphere2ID);
myPhysics.simulate();
while ( LoopGDK ( ) )
{
myPhysics.getPhysicsResults();
//Check for collisions and deal with them
checkCollisions();
// move the camera
if ( dbUpKey ( ) )
dbMoveCamera ( 1 );
if ( dbDownKey ( ) )
dbMoveCamera ( -1 );
myPhysics.updateActors();
myPhysics.simulate();
dbSync ( );
}
return;
}
void checkCollisions()
{
// All recorded collisions go onto a stack, when FulcrumPhy::getContactData() is called
// the last collision is retrieved and removed from the stack. This is why we keep
// calling for collisions in a 'while' loop until there are no collisions left.
while(myPhysics.getContactData())
{
dbText(0, 0, "CONTACT....");
// When FulcrumPhy::getContactData has been called, you can access which
// two objects/actors were involved in the contact with the following functions
int actorA = myPhysics.getContactActorA();
int actorB = myPhysics.getContactActorB();
// Now we have the two objects/actors we can deal with them as we wish
if (actorA == groundID || actorB == groundID) //something hits the ground
{
if(actorA == sphere1ID || actorB == sphere1ID)
{
dbText(0, 15, "SPHERE 1 HITS THE GROUND");
}
if(actorA == sphere2ID || actorB == sphere2ID)
{
dbText(0, 35, "SPHERE 2 HITS THE GROUND");
}
}
}
}
NOTE: You need unofficial update to run this code, you can get it a few posts up.
@haliop - You can do vehicles(and beep) with the unofficial update, let me know if you want some sample code, although it should all be done Wednesday anyway, hopefully.
