# Questions tagged [direction]

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### 2D Physics: storing previous position vs storing velocity

I saw a number of 2d game tutorials and books where previous position of an object was stored in state instead of velocity vector. Velocity is then calculated each frame as a difference between ...
• 93
8k views

### How can I draw a line of certain length and direction?

I want to create a line of certain length and direction. What I mean by this is drawing a line from Point A to Point B. Normally in Unity C# to draw a line from Point A to Point B is simply: ...
• 407
9k views

### How to smoothly rotate a vector in a direction?

I'm looking for an easy way to achieve the following: ...
• 81
12k views

### Determining if something is on the right or left side of an object?

I have a character in a 3D world which is facing an arbitrary direction on a flat plane, the player can click on the left or right side of the character and based on which side is clicked on a ...
• 1,480
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### How to get direction and velocity of movement of an object dragged with the mouse in Unty (C#)

I have an object that is dragged by the mouse (X and Z positions) over a table, with the following simple code: ...
• 529
2k views

### How do I set angular velocity/torque so that it's pointing to velocity/direction?

Right now, when I spawn a shootable object, it goes like this: Because I just set it's angle to this: ...
• 467
1k views

### Why does a unit vector show direction?

If I have two objects, Person A and Person B, and I want to know if Person B is facing the same direction as Person A; once I have the vectors, how do I use the normalized vector to show direction? ...
• 271
223 views

### What direction does directional audio come from for a 2D view?

In a 3D game, it makes sense that stereo balance is based on the angle between your camera direction and the directionto the audio source. Is 2D audio just "fudge the left-right balance until it ...
• 8,964
692 views

### How do I find the 2D direction to a 3D location?

I'm writing a 3D space flightsim, and I'm trying to display a 2D arrow on screen that points to the player's selected target. To clarify, the arrow needs to point in the direction that the player has ...
• 588
1k views

### Calculate turn rate between xy and target xy on a moving sprite with variable speed

My First question on here so be kind... I am writing an aerodrome simulator in as2, I need to calculate a turn rate between 2 points so that the aircraft turns nicely. I have tried a few things but ...
886 views

### How do I detect a tile map collision's direction? [duplicate]

I'm implementing collision detection with the map for my platformer. I have a method that generates a polygon on every tile and checks if the player hits it -- that's all fine. The problem is that ...
• 31
4k views

### Random Direction Vector Relative To Current Direction

I have a 2D vector where the x and y values are randomly generated using a range between -1 and 1 respectively. I use this as the direction to move an object in which works great. ...
• 556
2k views

I'm trying to implement shadow mapping to my engine. I started with directional lights because they seemed to be the easiest one, but I was wrong :) I have implemented deferred shading and I retrieve ...
• 690
100 views

### How can I move an object in a direction other than the ordinals?

I want to move a game object from its current position to the mouse position, but my current code only ever moves in one of the eight ordinal directions. In other words, I want it to move along the ...
• 320
162 views

### Collision resolution when moving in two directions

I am making a bomberman clone and I'm having problems regarding moving on both x and y axis (pressing down+left, down+right, up+left). Here is a video to demonstrate the problem. I use Tiled for the ...
• 209
106 views

### Gerstner/Sinusoidal wave directional rotation (flow) in regards to ocean currents/trade winds

I'm trying to create an ocean simulation using Gerstner waves based on the GPU Gems: Effective Water Simulation from Physical Models. So far I've completed the directional wave functionality and ...
1 vote
2k views

### How to align a hint arrow to point along a path?

I am using CalculatePath and trying to use path.corners in order to give user a hint for path, that where should he lead next. I am using first two instances of <...
• 191
1 vote
243 views

### How to make an enemy projectile head to the player's position with constant speed

How can I dynamically set the movement speed of the X and Y of the projectile so that it moves at a constant speed when the projectile heads at the player's position? I know this has something to do ...
• 209
1 vote
1k views

### Making Ball Fling in a Curve Direction

I was wondering how to figuring out how to slice a ball (banana kick) by flinging it curve-ways. However, according to the LibGDX's gesture listener, the method for flinging only focuses on a straight ...
• 1,429
1 vote
751 views

### Raycast wrong direction

I use Physics.Raycast and transform.forward to shoot a ray in front of my gameobject, but the ray gets cast downwards instead. <...
• 113
1 vote
138 views

### How to decrease the size of a distance?

I made a code for the character to be teleported to the place where the mouse cursor is, if the distance is less than or equal to 350. Blueprint: I happen to wish that if the distance were greater, ...
1 vote
208 views

### Direction between objects (shortest distance around sphere)

I have two objects rotating around a sphere. One is controlled by the user (object A), another is simulating a user but controlled by the computer (object B). At random intervals of time I'd like ...
• 556
1 vote
31 views

### Rotate Sprite in direction it is moving while beeing dragged

I am working on a 2D topdown game where you have cars you can drag around. you can touch any given car and move it around. This kind of works but when I drag a curve the sprit of the car does not turn ...
• 11
1 vote
160 views

### How to mirror a vector through some other vector?

I have a player's direction (playerDirection). I want to fire two bullets, one rotated by -30f, and one by 30f, so it looks like this: Blue line is the ...
• 2,502
1 vote
185 views

### Why is there a discrepancy between these two transform.up vectors?

I was trying to implement a feature which required transform.up, the result didn't match the green axis gizmo displayed in the editor so I assumed it was being put ...
1 vote
3k views

### How to rotate a local position offset based on a direction vector?

I'm trying to fire three raycasts in the direction of movement, from offset starting points. I'm having trouble calculating the start positions of the rays based on the direction. As you can see in ...
• 237
1 vote
804 views

### Get GameObject which instantiated me in Unity

How can I get a GameObject from another GameObject? If I know, that the GameObject I want to get instantiated(using function Instantite()) the GameObject from which I want to get it. If there is no ...
1 vote
5k views

### Flip x when direction of the movement changed in Unity

What is the easiest and the most efficient way to flip x of the SpriteRenderer when direction of the movement changed in Unity? I use ...
• 751
1 vote
4k views

### How to know from which direction there is a collision with an object? In Unity C#

In the game, there is a ball, and moving objects that can hit it. I want the ball to move when an object hits it. But the ball should move to the right direction, the one which the collision was from. ...
1 vote
335 views

### Correct way/How to think to plan out "control/animation flow"?

So basically, a problem I've had in past attempt at making games (little playing around with stuff): how to do a correct, non-sloppy way of planning the flow of animations/control? Let's take an ...
• 235
1 vote
306 views

### How do I calculate a point between two points with a given distance percentage? [duplicate]

I've made a simple drawing: The distance between these two points is calculated with a simple formula: Which gives: 5,38 I need to calculate the green point's coordinates, which is set at 80% ...
• 2,502
1 vote
711 views

### How can I add two Vector3 directions together?

I have a direction to my target object, which is in a Vector3 format. I want cast a number of rays, as offsets from this initial direction. X is the object. D is the direction the player needs to ...
1 vote
685 views

### Why do characters only move in 4/8 directions in top games? [closed]

In many top down games, like Zelda (4 directions) There are only 4 or 8 possible directions. Why is this? Is it a design choice or a technology limitation? I can't think of any reason that even ...
• 5,315
1 vote
2k views

### How to translate a direction on the screen to 3D space?

EDIT: Alright, I've figured out what's wrong. I'm calculating the direction vector properly with the below code: ...
• 1,365
2k views

### How can I calculate force and acceleration?

I have problem of calculating the movement of the object. At the moment, I have a vectors calculated from the center of the screen minus the position of the object. ...
• 113
134 views

### Unity3d: Find which gameObject is in front

I have two gameObjects A and B. They are rotated at <...
• 311
459 views

### How to check if two normals/directions "look at" each other?

I need to flip polygons in my application. How do I determine if two vectors face each other, like in the second image below? Note that the origin of the vectors is also important, in addition to the ...
43 views

### Movement velocity relative to a static object (Vector Maths)

I have a static object. I have a moving player. If the player is moving directly towards the object then I want to return the value of 1. If the player is moving directly away from the the object ...
3k views

### How does this math behind converting angles to vectors work?

I calculated the vectors of my yaw and pitch successfully. Even tho it works fine, I can't seem to understand how the math works exactly. Could someone (graphically / demonstratively) explain me this ...
• 103
76 views

### Velocity Relative To A Vector

So I have a velocity vector b in world space and I have a "pointing" vector a in world space. I need to know how to make the ...
134 views

### Unity3d: Position a gameobject such that its forms a right angled triangle with other two gameobjects

How do I position C gameObject such that it forms a right angled triangle with A and B. I tried to use ...
• 311
117 views

### Bullet direction incorrect around sphere

Here is a little background on how my game objects are set up, and how the rotations and firing bullets work. I am working on this game in Unity. I have two game objects that orbit a sphere (for ...
• 556
242 views

### Make object face another object on a sphere

I have a game I'm working on in Unity where there are two objects on a sphere at random locations (and random rotations). I want one of the objects to always rotate so that if it were to fire a bullet ...
• 556
871 views

### Create rotation in random direction from existing rotation

I am working on a game in Unity, and I currently have a game object (object A) located at the origin. I have a child of this game object (object B), that is 10 units back on the z-axis. When I rotate ...
• 556
180 views

### Calculating correct normal direction from multi-variable function

I am working with a plane model which I am offsetting the vertices on the up axis to look like waves by using the function: Sin(vertex.x * frequency) * amplitude + Cos(vertex.y * frequency) * ...
30 views

### Which is the best way to get the orientation angle for each direction (Forward, Right, Left, Backward)

I'm running into an issue for a while. The best way to find the orientation angle between 4 directions in a strafe locomotion mode. The character can move around in 4 directions. Having a velocity ...
32 views

### Player can only dash towards to the top right, but can't in any other direction?

I have a dash mechanic, but it only seems to be working when the player is going up, down, left, right, or to diagonally to the upper right. It won't work diagonally in any other directions, and I can'...
• 1
533 views

### Unity - Smooth player input direction when changing camera

Preface- I'm very new to Unity. I'm working on an exercise using fixed cameras like how they work in the PSX final fantasy games. I have the camera scripts working fine but it's an aspect of the ...
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