Games how move object to another object position ?
- Thread starter sager
- Start date
-
- Tags
- direction move object speed
Similar threads
B4A Library [B4X] XUI Views - Cross platform views and dialogsGames [XUI2D] Tank Example
B4J Tutorial [B4X] Modules, Files, Groups and Folders
B4J Tutorial [B4X] [BitmapCreator] Creating a cross platform Tetris game
B4R Tutorial [B4X] B4RSerializator - Send and receive objects instead of bytes
I like to use the MotorJoint to move objects to a target position. Check this example: https://www.b4x.com/android/forum/threads/xui2d-mouse-following-a-path.98895/#content
and if they collide then the other object will be moved by an impuls. You may avoid that by setting the correct Collision Mask Bits:
Collision Mask Calculator
Collision Tutorial
thank you , but can give me simple code to move object to another without path ?
B4X:
thing.body.Position = X2.CreateVec2( x1, y1 )Maybe I did not explain what I want correctly,
I want the enemy move to player Position
i try : template.BodyDef.LinearVelocity
But it gave me different results
Well, that is for sure different!
1) calculate the direction vector by subtracting the enemy Position from the Player position
2) normalize the direction vector
3) now your approach is taken: set the LinearVelocity with this new vector from 2)
4) may be it shall go faster or slower then in step 3) you should multiply the new vector 2) with a scalar
You may add a more sofisticated solution by using "easing" (check google on 'easing')
1) calculate the direction vector by subtracting the enemy Position from the Player position
2) normalize the direction vector
3) now your approach is taken: set the LinearVelocity with this new vector from 2)
4) may be it shall go faster or slower then in step 3) you should multiply the new vector 2) with a scalar
You may add a more sofisticated solution by using "easing" (check google on 'easing')
can you give me simple example , thanks
Erel modified his Mouse Example and this is the code extract that I explained in post #7:
B4X:
Private Sub MoveEnemy
Dim v As B2Vec2 = Mouse.Body.Position.CreateCopy
v.SubtractFromThis(Enemy.Body.Position)
If v.Length > 0.7 Then ' <--- check, if they are too close to each other
v.NormalizeThis
' you could multiply that v by a scalar to change the speed like:
' v.MultiplyThis(1.5) ' >1 = faster, <1 = slower
Enemy.Body.LinearVelocity = v
Enemy.Body.SetTransform(Enemy.Body.Position, ATan2(v.Y, v.X) + cPI / 2) ' <--- turning the enemy in player direction
Else
Enemy.Body.LinearVelocity = X2.CreateVec2(0, 0) ' <--- yes, too close, therefore stop enemy
Enemy.Body.AngularVelocity = 0 ' <--- stops the spinning
End If
End Sub
Last edited: