Please is it possible to make a Player with rigidbody or character controller run on wall just like The Flash. Please guide me on how to implement this.Here's a link of what I'm talking about. Thank you in advance.
Rotate the player to be vertical to the building, adjust the gravity parameter on your rigid body (make it lower so the added force won't be canceled by it) and just add the force (or set the velocity, whatever makes you happy)
I'm going to assume you already know how to move the player around on the ground. All you need to do is create some form of detection for when they want to begin running on the wall (maybe the player presses a button, or walks up to the wall), at which point you will want to do 2 things: rotate the player to have their feet on the wall, and change gravity to be pulling the player into the wall.
If we assume the player is facing the wall when they go up on it, you can just rotate 90 degrees backwards. Changing gravity should be easy too. Once the player is fully rotated, do something like this
Vector3 newGravityVector = tranform.down.normalized
Physics.gravity = transform.down.normalized * 9.8 //9.8 is the default gravitaty value, feel free to use a different multiplier if you wish.
(this script should be attached to your player)
Related
I am trying to make a game where i got a ball with an arrow rotating around it. The ball starts as immovable, but when i hit a button i launch it to the direction the arrow is pointing at. Player will have the option mid air to press another button to make the ball "sticky" so when it hits a wall it will stick to the surface and repeat the process till he gets to the top of the level.
Aside from that, i want to give the option to the player to not stick to the wall if he doesn't press that button and instead bounce off the wall but when he does that, the player should speed up with every bounce, giving the option to either play it safe and slow or try to go fast getting more points as he does.
For the early prototyping i used force to move the player up every time he launches but i am not sure how i can make him speed up every time he bounces off the wall. It feels to me like a math problem more than it is a coding challenge. What i am thinking is that i have to find the angle on which player hits the wall, and add force according to that towards the direction he is supposed to follow after the collision.
Sadly i am not that good with trigonometry (working on it though). I am thinking that i might need to use a formula containing sin, cos, tan formulas but i m not sure how to do it. Any help is much appriciated! If you need more information on it please tell me and i ll be happy to provide.
Edit: After the first reply to this question i also found out those links that dive deeper into the subject. I m gona link them here for people that have the same issue.
Bouncing a ball off a wall with arbitrary angle?
http://www.3dkingdoms.com/weekly/weekly.php?a=2
If your ball has velocity vector V=(vx,vy), then after bouncing from standing surface with normal N, ball's new velocity is
V' = V - 2 * N * (V.dot.N)
where dot is scalar product of vectors (vx*nx+vy*ny)
Particular cases:
bouncing from vertical wall (N=(+-1, 0)) causes reversing of vx-component, vy component remains the same. V' = (-vx, vy)
bouncing from horizontal wall (N=(0, +-1)) causes reversing of vy-component, vx component remains the same. V' = (vx, -vy)
Note I recommend to work in velocity vector components, and use angles only when they are really needed.
If you need to calculate bouncing from moving bat, it is worth to change stationary coordinate system to moving one, connected with the bat, find reflection in that system, and revert to stationary system.
Ok so problem was solved!
I want to thank both #MBo and #shingo for their contribution to the solution. While the answer of Mbo solved the problem via trigonometry and gave me nice material to study and figure out how things work, i followed shingo's advice in the comments of my question and managed to do it without diving deep into math.
So basically what he said, and what i did, was to use Unity's physics engine and let the ball hit the wall. After the ball bounces off the wall, it gets a new Velocity vector towards the direction it would go based on physics. I then created an OnColllisionExit check, and when the ball stops colliding with the wall, i AddForce to it to the direction of its new Velocity Vector3.
Works like a charm!
Thank you all for your contributions!
I am using Unity3D to make a replica of the game "Rolling Sky" which you can find on the Google/Apple app store. I was able to make a simple floor which the ball will move on and I was also able to make the ball (Player) move left and right. After moving the ball a couple of times back and fourth, it starts float in the air and eventually what it seems like is change it's axis.
I came up with a couple of alternatives that I think would work, but I had trouble coming up with the code to make it function properly.
1) Do not rotate the ball at all. Just have it smoothly move back and forth.
^^ Probably the best solution I could come up with.
or
2) Use CharacterController to have complete control of how the ball reacts to different events, scenarios, etc.
^^ This would probably be the most necessary and hardest of I had to guess.
or
3) Move the ball an x amount of pixels everytime I move left or right.
^^ I would assume this would create a lot more glitches than what I have right now.
public class PlayerController : MonoBehaviour
{
public float speed;
void Update()
{
transform.Translate(Vector3.right * speed * Input.GetAxis("Horizontal") * Time.deltaTime);
}
}
EDIT:
I was able to provide my own answer, but if anyone has any alternatives, feel free to post your solution!
To prevent the player ball from floating into the sky, no other code was needed. Simply go to the Rigidbody component on the Player and expand the "Constraints" menu. Next, check the axis boxes that you would like to freeze the rotation on to prevent the ball from spinning like so in the picture.
Click the link to see the picture
here.
In this case, I did not freeze the ball on the x axis because I eventually want to animate it to spin as if it is rolling forward.
You're using transform.Translate
and
You're using Vector3.right
transform.Translate will directly move the ball without thought of rotation. You will need to take the object's rotation into consideration when translating. You can also use the physics engine and use Rigidbody.MovePosition to force position or Rigidbody.AddForce to utilize physics interactions.
Vector3.right will use the constant value equivalent to Vector3(1, 0, 0). This will not be in regard to the object's rotation or facing.
I suggest looking through Unity's tutorial for a ball-roller and see how they complete the task of user input with a user controlled ball.
So I'm making a 3D pool game. Basically I have a main camera that when you press a button it adds force to the cue ball based on the position of the camera, which works ok.
But whenever the cue ball hits the wall of the table, it just stops. I want it to smoothly bounce off the wall like a real pool cue ball would.
The cue ball is just a basic sphere Game Object. The walls are basic cubes with colliders.
I have tried Vector3.Reflect with no success. It seems to bounce back a tiny bit but then immediately stops.
Any help would be great!
You should create a PhysicMaterial with low or no friction (both dynamic and static), bounciness = 1 and Bounce Combine = Maximum and then apply that PhysicMaterial to the rigidbody of your sphere
You can do one thing.
Store the ball velocity when it collide with the wall, calculate the reflected direction through Vector3.Reflect and give the stored velocity to the ball in reflected direction.
Hope that this will help you...
Best,
Hardik.
To make bounce on wall we need to create physic material and after that we need to change the value of dynamic friction =0.3 and static friction =
0.3 and bounciness=0.8 and frictionCombine choose Average from dropdown and bouncecombine choose Average .
Hence the ball is start bouncing on the wall by using the upper property.
I'm learning Unity 2D and I want to do something like this:
Basically the character runs into the box/edge and it falls over. BUT! I want to lock down the X axis somehow. So in reality it would kinda look like if it was just rotated simple by 90 degrees (with some kind of acceleration).
I've tried to do it with rigidbody2d and edgecollider and AddForceAtPosition, but I failed miserably.
What I really wanted to do is lock down the "wall" and apply the force at the very top of the rigidbody so it would just fall over to the right, but it simply didn't work out.
Any help would be appreciated!
Remember that same logic applies to physics in games as it does to physics in real life. Just make a hinge and put the anchor and connected anchor at the same location at the bottom and set a limit for hinge.
Wall:
Hinge:
I set Lower Angle to something near 90, otherwise wall becomes uneven when it drops.
Remember to put a Rigidbody2D and a Box Collider for wall.
Firstly, I would lock the rotational axes that you don't want to move on your rigidbody, then, if your object origin is located on the ground / bottom of the object, you can add rotational torque to the object to achieve the affect you want :) http://docs.unity3d.com/ScriptReference/Rigidbody.AddTorque.html
Okay, so I've got some code to make my enemies follow the player in my XNA game, but they only follow the player until the player is in front of them. If the player moves past an enemy, it will stop moving towards him. Instead they will continuously move up and down with the player.
The code I've used is this:
Vector2 direction = player.Position - goblins[i].Position;
direction.Normalize();
Vector2 velocity = direction * goblins[i].enemyMoveSpeed;
goblins[i].Position += velocity;
(ignore the goblins bit, I've just replaced the graphics)
Not entirely sure where to go with it, any ideas?
Tom, hello, how are you?
Here you have 2 examples that helped me a lot:
Chase & Evade (http://xbox.create.msdn.com/en-US/education/catalog/sample/chase_evade) This is a Microsoft sample that shows how to implement several simple behaviors for AI, including chasing, evading, and wandering.
Adding a field of view to enemies (http://robotfootgames.com/xna-tutorials/5-xna-platformer-starter-kit-field-of-view-for-enemies) Related to number 1 sample and to Plaformer starter kit