8
votes
Accepted
Segmentation fault when trying to detect collisions in breakout
You may also have to make sure it's not null before you try to pass it into getType(). detectCollision will return null when there are no collisions.
- 352
8
votes
Accepted
Collision of ball with other objects
The Idea Behind Collision:
There's a function namely detectCollision() that's already written
for you and ready to use. This function, when it's called, checks
whether any of the sides of the ball ...
- 17.3k
6
votes
Bricks are not available to the detectCollision function
Your first assumption was not wrong. The bricks are not returned to the main function, so you need to find another way to refer to them while the game is running.
The bricks do definitely exist as ...
- 2,625
4
votes
Accepted
Ball bounces just above paddle
detectCollision assumes that the width of your ball is RADIUS*2. You have initialized your ball with a width of RADIUS. So detectCollision will return a collision before the ball hits the paddle.
- 18.3k
3
votes
Breakout slows down just before finishing the game
Just for the record, I had the same problem of breakout getting "laggy" after running (in the appliance) for a few seconds. Staff's implementation would run properly, so it wasn't strictly a hardware (...
- 1,140
3
votes
Collision of ball with other objects
Here is a bit of psuedocode to help you define detectCollision:
If object is not equal to NULL then check if:
object == paddle, if it is, flip the y-velocity accordingly
else if, object == GRect (...
- 483
2
votes
Segmentation fault when trying to detect collisions in breakout
What type have you initialized the variable "collision" to be? If you initialized it as a string, that could be the issue.
Make sure you are initializing it as:
GObject collision = detectCollision(...
- 1,317
2
votes
Collision of ball with other objects
On the main routine, you have a call to a function that detect collisions.
The ball is the only moving object.
What you need to do is checking if the ball "touches" an object or the walls.
...
- 1,156
2
votes
Accepted
Pset3 Breakout: Question on variable scope in while loop
You're on the right track, but there's an additional issue going on.
Think of scope this way: a variable only exists within the curly braces that immediately surround it. So, when you declare them ...
- 63.1k
1
vote
Pset3 Breakout: Question on variable scope in while loop
Whoops, sorry guys. Just realized that for the latter situation, when the code goes through the If statement then loops back to the top of the while statement, the velocities get assigned back to ...
- 45
1
vote
Accepted
Pset3 Breakout Ball blatantly ignores velocity change when colliding with wall
Your code isn't reversing the direction after bouncing off a wall, it's setting a specific direction. Look at the following:
if (getX(ball) <= 0)
{
xvelocity = drand48() + 3;
xvelocity = -...
- 63.1k
1
vote
Accepted
Collision detection with the paddle
The function detectCollision(...) has a specific purpose - to detect whether the ball has collided with another object, and, if it has, to return the identifier of that object. Since this function is ...
- 63.1k
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