I would like to know how to move an object from pointA towards pointB by a small distance.
I know how it's done in 2d, but 3d is definitely a little different.
Here is some code of how i do it in 2D.
Vector pointA = ccp(1,1);
Vector pointB = ccp(10,10);
//find angle between the two points
float diffX = pointA.x - pointB.x;
float diffY = pointA.y - pointB.y;
float angle = atan2f(diffX, diffZ);
angle -= CC_DEGREES_TO_RADIANS(90);
float dis = 1.5;//how far away this should extend from the last particle
float x = -cosf(angle)*dis;
float y = sinf(angle)*dis;
object.position = ccp(object.position.x+x,object.position.y+y);
With that code i can successfully move an object by a distance of 1.5 towards pointB.
BUT i just can't find out how to do it with 3 dimensions.
So my question is how do i accomplish this in 3D?
Uh, I think you don't need to calculate angle. Just normalize gap and move.