LibGDX Box2D Prevent object from slowing down after jumping
I'm coding a 2d platformer in libGDX with Box2D, and I just realized that if your object jumps while running and then lands on a surface to continue running, he slows down by like 120% for about a second. That's really annoying, and I can't really come up with a solution. I've tried making the speed higher for a second after the player hits the ground after jumping, but that doesn't really seem to do the trick. This is what I'm using to move the player:
//jumping
if(Gdx.input.isKeyJustPressed(Keys.SPACE) && player.b2body.getLinearVelocity().y == 0)
player.b2body.applyLinearImpulse(new Vector2(0, 4.2f), player.b2body.getWorldCenter(), true);
//moving right
if(Gdx.input.isKeyPressed(Keys.D) && player.b2body.getLinearVelocity().x <= 2)
player.b2body.applyLinearImpulse(new Vector2(0.17f, 0), player.b2body.getWorldCenter(), true);
//moving left
if(Gdx.input.isKeyPressed(Keys.A) && player.b2body.getLinearVelocity().x >= -2)
player.b2body.applyLinearImpulse(new Vector2(-0.17f, 0), player.b2body.getWorldCenter(), true);
Here is a video showing what's happening.
I hope I've provided the correct information, please tell me if I haven't.
EDIT: I've also tried setting the position in the x-axis with
player.b2body.setLinearVelocity(1f, 0);
but that seems to make the player sort of glide-fly to the right.
java libgdx box2d physics
asked Nov 10 '18 at 18:59
ILikeJavaILikeJava
125
|
show 4 more comments
I'm coding a 2d platformer in libGDX with Box2D, and I just realized that if your object jumps while running and then lands on a surface to continue running, he slows down by like 120% for about a second. That's really annoying, and I can't really come up with a solution. I've tried making the speed higher for a second after the player hits the ground after jumping, but that doesn't really seem to do the trick. This is what I'm using to move the player:
//jumping
if(Gdx.input.isKeyJustPressed(Keys.SPACE) && player.b2body.getLinearVelocity().y == 0)
player.b2body.applyLinearImpulse(new Vector2(0, 4.2f), player.b2body.getWorldCenter(), true);
//moving right
if(Gdx.input.isKeyPressed(Keys.D) && player.b2body.getLinearVelocity().x <= 2)
player.b2body.applyLinearImpulse(new Vector2(0.17f, 0), player.b2body.getWorldCenter(), true);
//moving left
if(Gdx.input.isKeyPressed(Keys.A) && player.b2body.getLinearVelocity().x >= -2)
player.b2body.applyLinearImpulse(new Vector2(-0.17f, 0), player.b2body.getWorldCenter(), true);
Here is a video showing what's happening.
I hope I've provided the correct information, please tell me if I haven't.
EDIT: I've also tried setting the position in the x-axis with
player.b2body.setLinearVelocity(1f, 0);
but that seems to make the player sort of glide-fly to the right.
java libgdx box2d physics
asked Nov 10 '18 at 18:59
ILikeJavaILikeJava
125
I suspect it happens because the body collides with the ground and the force is therefore slowed down. What you could try is to apply a force when jumping, like you do. But when moving to the left and right, instead set its position
– Squiddie
Nov 11 '18 at 15:04
Tried this, but that seems to give another weird result. I've edited my original post, so you can see it there. Thanks!
– ILikeJava
Nov 11 '18 at 16:50
You have to reset the velocity when the user isn't pressing the button
– Squiddie
Nov 11 '18 at 17:06
@Squiddie Found out the problem with this methode is that I need to set both velocity X and Y, which means the Y has to be affected. I'm sure there is a way to work around that, but I can't really figure out how..
– ILikeJava
Nov 14 '18 at 20:30
Can't you just set y velocity to 0?
– Squiddie
Nov 14 '18 at 21:30
|
show 4 more comments
I'm coding a 2d platformer in libGDX with Box2D, and I just realized that if your object jumps while running and then lands on a surface to continue running, he slows down by like 120% for about a second. That's really annoying, and I can't really come up with a solution. I've tried making the speed higher for a second after the player hits the ground after jumping, but that doesn't really seem to do the trick. This is what I'm using to move the player:
//jumping
if(Gdx.input.isKeyJustPressed(Keys.SPACE) && player.b2body.getLinearVelocity().y == 0)
player.b2body.applyLinearImpulse(new Vector2(0, 4.2f), player.b2body.getWorldCenter(), true);
//moving right
if(Gdx.input.isKeyPressed(Keys.D) && player.b2body.getLinearVelocity().x <= 2)
player.b2body.applyLinearImpulse(new Vector2(0.17f, 0), player.b2body.getWorldCenter(), true);
//moving left
if(Gdx.input.isKeyPressed(Keys.A) && player.b2body.getLinearVelocity().x >= -2)
player.b2body.applyLinearImpulse(new Vector2(-0.17f, 0), player.b2body.getWorldCenter(), true);
Here is a video showing what's happening.
I hope I've provided the correct information, please tell me if I haven't.
EDIT: I've also tried setting the position in the x-axis with
player.b2body.setLinearVelocity(1f, 0);
but that seems to make the player sort of glide-fly to the right.
java libgdx box2d physics
asked Nov 10 '18 at 18:59
ILikeJavaILikeJava
125
I'm coding a 2d platformer in libGDX with Box2D, and I just realized that if your object jumps while running and then lands on a surface to continue running, he slows down by like 120% for about a second. That's really annoying, and I can't really come up with a solution. I've tried making the speed higher for a second after the player hits the ground after jumping, but that doesn't really seem to do the trick. This is what I'm using to move the player:
//jumping
if(Gdx.input.isKeyJustPressed(Keys.SPACE) && player.b2body.getLinearVelocity().y == 0)
player.b2body.applyLinearImpulse(new Vector2(0, 4.2f), player.b2body.getWorldCenter(), true);
//moving right
if(Gdx.input.isKeyPressed(Keys.D) && player.b2body.getLinearVelocity().x <= 2)
player.b2body.applyLinearImpulse(new Vector2(0.17f, 0), player.b2body.getWorldCenter(), true);
//moving left
if(Gdx.input.isKeyPressed(Keys.A) && player.b2body.getLinearVelocity().x >= -2)
player.b2body.applyLinearImpulse(new Vector2(-0.17f, 0), player.b2body.getWorldCenter(), true);
Here is a video showing what's happening.
I hope I've provided the correct information, please tell me if I haven't.
EDIT: I've also tried setting the position in the x-axis with
player.b2body.setLinearVelocity(1f, 0);
but that seems to make the player sort of glide-fly to the right.
java libgdx box2d physics
java libgdx box2d physics
asked Nov 10 '18 at 18:59
ILikeJavaILikeJava
125
asked Nov 10 '18 at 18:59
ILikeJavaILikeJava
125
edited Nov 11 '18 at 16:56
ILikeJava
asked Nov 10 '18 at 18:59
ILikeJavaILikeJava
125
asked Nov 10 '18 at 18:59
ILikeJavaILikeJava
125
asked Nov 10 '18 at 18:59
ILikeJavaILikeJava
125
125
I suspect it happens because the body collides with the ground and the force is therefore slowed down. What you could try is to apply a force when jumping, like you do. But when moving to the left and right, instead set its position
– Squiddie
Nov 11 '18 at 15:04
Tried this, but that seems to give another weird result. I've edited my original post, so you can see it there. Thanks!
– ILikeJava
Nov 11 '18 at 16:50
You have to reset the velocity when the user isn't pressing the button
– Squiddie
Nov 11 '18 at 17:06
@Squiddie Found out the problem with this methode is that I need to set both velocity X and Y, which means the Y has to be affected. I'm sure there is a way to work around that, but I can't really figure out how..
– ILikeJava
Nov 14 '18 at 20:30
Can't you just set y velocity to 0?
– Squiddie
Nov 14 '18 at 21:30
|
show 4 more comments
I suspect it happens because the body collides with the ground and the force is therefore slowed down. What you could try is to apply a force when jumping, like you do. But when moving to the left and right, instead set its position
– Squiddie
Nov 11 '18 at 15:04
Tried this, but that seems to give another weird result. I've edited my original post, so you can see it there. Thanks!
– ILikeJava
Nov 11 '18 at 16:50
You have to reset the velocity when the user isn't pressing the button
– Squiddie
Nov 11 '18 at 17:06
@Squiddie Found out the problem with this methode is that I need to set both velocity X and Y, which means the Y has to be affected. I'm sure there is a way to work around that, but I can't really figure out how..
– ILikeJava
Nov 14 '18 at 20:30
Can't you just set y velocity to 0?
– Squiddie
Nov 14 '18 at 21:30
I suspect it happens because the body collides with the ground and the force is therefore slowed down. What you could try is to apply a force when jumping, like you do. But when moving to the left and right, instead set its position
– Squiddie
Nov 11 '18 at 15:04
I suspect it happens because the body collides with the ground and the force is therefore slowed down. What you could try is to apply a force when jumping, like you do. But when moving to the left and right, instead set its position
– Squiddie
Nov 11 '18 at 15:04
Tried this, but that seems to give another weird result. I've edited my original post, so you can see it there. Thanks!
– ILikeJava
Nov 11 '18 at 16:50
Tried this, but that seems to give another weird result. I've edited my original post, so you can see it there. Thanks!
– ILikeJava
Nov 11 '18 at 16:50
You have to reset the velocity when the user isn't pressing the button
– Squiddie
Nov 11 '18 at 17:06
You have to reset the velocity when the user isn't pressing the button
– Squiddie
Nov 11 '18 at 17:06
@Squiddie Found out the problem with this methode is that I need to set both velocity X and Y, which means the Y has to be affected. I'm sure there is a way to work around that, but I can't really figure out how..
– ILikeJava
Nov 14 '18 at 20:30
@Squiddie Found out the problem with this methode is that I need to set both velocity X and Y, which means the Y has to be affected. I'm sure there is a way to work around that, but I can't really figure out how..
– ILikeJava
Nov 14 '18 at 20:30
Can't you just set y velocity to 0?
– Squiddie
Nov 14 '18 at 21:30
Can't you just set y velocity to 0?
– Squiddie
Nov 14 '18 at 21:30
|
show 4 more comments
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I suspect it happens because the body collides with the ground and the force is therefore slowed down. What you could try is to apply a force when jumping, like you do. But when moving to the left and right, instead set its position
– Squiddie
Nov 11 '18 at 15:04
Tried this, but that seems to give another weird result. I've edited my original post, so you can see it there. Thanks!
– ILikeJava
Nov 11 '18 at 16:50
You have to reset the velocity when the user isn't pressing the button
– Squiddie
Nov 11 '18 at 17:06
@Squiddie Found out the problem with this methode is that I need to set both velocity X and Y, which means the Y has to be affected. I'm sure there is a way to work around that, but I can't really figure out how..
– ILikeJava
Nov 14 '18 at 20:30
Can't you just set y velocity to 0?
– Squiddie
Nov 14 '18 at 21:30