public static bool isHitFromAbove(float sourceMaxY, ChipmunkBody target, ChipmunkArbiter arbiter)
{
/// The collision normal is the direction of the surfaces where the two objects collided.
/// Keep in mind that the normal points out of the first object and into the second.
/// If you switch the order of your collision types in the method name, it will flip the normal around.
// came from above?
if (target.velocity.normalized.y < -COS_45)
{
// check collision points to be all above collider's height
for (int i = 0, c = arbiter.contactCount; i < c; ++i)
{
if (sourceMaxY > (arbiter.GetPoint(i).y - arbiter.GetDepth(i)))
{
return(false);
}
}
return(true);
}
return(false);
}
public static bool beginCollisionWithScenery(ChipmunkArbiter arbiter)
{
ChipmunkShape shape1, shape2;
// The order of the arguments matches the order in the function name.
arbiter.GetShapes(out shape1, out shape2);
Player player = shape1.GetComponent <Player>();
/*if (player.isDying())
* return false; // stop collision with scenery since this frame*/
player.exitedFromScenery = false;
// avoid ground penetration (Y axis)
// NOTE: to solve this Chipmunk has the property collisionBias and/or minPenetrationForPenalty
Vector2 thePos = player.body.position;
float depth = arbiter.GetDepth(0);
thePos.y -= depth;
player.body.position = thePos;
// if isn't a grounded surface then stop velocity and avoid getting inside the object
if (GameObjectTools.isWallHit(arbiter))
{
// get sign direction to know what offset apply to body
player.signCollision = -Mathf.Sign(player.transform.position.x - shape2.transform.position.x);
// set moving velocity close to 0 so player can't move against the wall but can change direction of movement
player.walkVelocity = 0.001f;
// move back to the contact point and a little more
thePos = player.body.position;
thePos.x += player.signCollision * (depth - 0.01f);
player.body.position = thePos;
}
// Returning false from a begin callback means to ignore the collision response for these two colliding shapes
// until they separate. Also for current frame. Ignore() does the same but next frame.
return(true);
}