CODEWITHSUNDEEP
javalibgdxbox2dphysics
Luke Vo
Luke Vo

Reputation: 20708

Body lost a velocity component when hitting a wall

I am creating a Breakout game using Box2D (of LibGdx if anyone interest). Everything works well until when the ball hits the wall when moving with a very small angle. Please look at the image for details:

enter image description here

I tried to set the wall friction to 0 and restitution to 1, as well as the ball's friction and restitution, but it still move along the wall (I have no World Gravity, and only gave the ball a starting Impulse when it hits the paddle). This also happens to the vertical wall if the angle is small enough, it will lose X velocity.

How can I move the ball the way I expected? If there is no friction, what caused the problem?

Upvotes: 4

Views: 256

Answers (1)

yigiter
yigiter

Reputation: 412

Try changing the velocity treshold in libgdx.

void World.setVelocityThreshold(float threshold);
float World.getVelocityThreshold();

http://www.badlogicgames.com/wordpress/?p=2030

Upvotes: 1

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