# Questions tagged [vector]

A mathematical concept that can be used to express position, direction or velocity and which can simplify or outright trivialise spatial problems.

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511 views

### Problems with Raycasting Requirements [closed]

Im working on a script which kinda works like an Enemy AI. Its kinda like a detection system with requirements that are required to be met. This is a recent question i asked using my code Raycast ...
31 views

### using a starting and ending point, how can i find how far in-between those two points a third point is?

quick diagram to explain what i mean. i have a start and an end, the third point can be anywhere in space, but i need to calculate from 0-1 how far they are in-between these two points. The points are ...
76 views

### Confirming whether a user has drawn a character correctly

This is a follow-up post to this post: How can I check if a player-drawn line follows a path?. I'm having difficulty implementing the said feature and I believe it's because of a lack of math ...
38 views

### 3D AxisAngle spins at 180 degrees

I am using the Axis Angle technique on objects so that they are oriented away from a planet surface like in Super Mario Galaxy. I am using two unit vectors [0,1,0] and a normal vector from the planet. ...
230 views

### How can I detect whether a point is moving in a circle?

I want to detect if my GameObject (Vector3 Point) being dragged by the player's finger is moving in a circular fashion. I thought I could save the last 5 points ...
197 views

### Understanding use of dot product in speed boost pad

I am trying to understand the dot product. I have found a website that gives you intuition about this topic and one of the examples involves a speed boost pad: Imagine the red vector is your speed (x ...
81 views

### check if joystick magnitude is increasing

I use joystick mechanic. What I want to do is: Translating my object forward when my joystickInput.magnitude is increasing. Translating backward when my ...
392 views

### Jumping up quicker? (Paper Mario style jump)

As shown here, Paper Mario's jump takes 8 frames go reach the max jump height and 12 frames to get back to the ground. This is pretty unusual, any idea how to jump up that quick with a rigidbody? I ...
12 views

### how to make an axis from one gameobject the same as the axis from another gameobject

I am making a third person script in unity and I want it so that when you aren't moving you can pan around the player and when you are moving the player faces in the opposite direction to the camera ...
86 views

### Get a Vector2 Based on Object Rotation in Unity

I feel like there is an obvious answer to this but I can't find it. Is there a function in unity that gives you a Vector2 (or 3) based on the rotation of an object. for example: z rotation = 0 ---> ...
3k views

### What are some good examples of the practical usages of cross product in game development?

I know how to calculate cross product, and know that the cross product of 2 vectors is a third vector that is perpendicular to a plane created by the first 2 vectors. However, I have not seen any good ...
451 views

### Change sprite angle on sloping ground

I have a problem here with GameMaker built-in physics environment.My player is designed to be on a skateboard. I want my player to rotate its sprite, according to the kind of fixture(up or down slopes)...
21 views

### Rear Propulsion Steering Spline, or what is this called?

What I am looking for is essentially to know what this is, or what I can google to learn how to do it... unless of course the solution is simple. You have an object at the start position facing a ...
71 views

### Vector2 distance_to weird results

I'm using Vector2.distance_to to get the distance between a MeshInstance and a KinematicBody but the results aren't as expected. I'm using ...
302 views

### (Unity3D) Determine If Ray Intersects Given Rectangle

I'm building a city generator for my game and I want to ensure buildings are never placed in such a way that they overlap roads. Currently I have the system build the roads, then place buildings ...
39 views

### Angle object only in the X axis

I'm trying to code a turret to angle towards a target, where I have one part of the turret only rotating on the left/right, and I want to animate another part to only angle up/down. I've got the left/...
158 views

### Godot - Offscreen Target Indicator

I have a crosshair image that will lock onto enemies that are visible in the camera and will stay on the edge of the screen when the enemy is offscreen. This works until you face more than 90º away ...
56 views

### Knockback to zone on non-rectangular field

I have a playing field which is divided in 4 zones (as seen on the image below) The player (blue) is on the second zone while there are 2 enemies (red) on the third zone. When the player throws an ...
57 views

### In a 3D grid of cubes, how to calculate index of a cube if we only know it's coordinates and the way cubes are generated?

I have a code that generates a grid of equally sized cubes in a cubic volume of given limited size, intended to be used for 3d path finding. Let's say cubes are objects stored in an array called ...
24 views

### Why aren't my Vector3 comparing correctly?

I have a machine and a I want to check if I can place a conveyor at its connexion point. I do it by checking if the machine is at the expected Input position of the conveyor and if the conveyor is at ...
26 views

### How to check if a point is on the plane given bottom-right point, top-left point, normal and the quaternion rotation of the plane

I know the world positions of A and B. We are also given the vector normal and the quaternion rotation of the plane How do I check if a point lies on the plane?
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### Swept AABB vs Line Segment in 2D

I've been trying to get a swept collision detection up and running now for almost a week and I can't for the life of me get it working. There is a answer on this linked here below: Swept AABB vs Line ...
45 views

### What does a Vector3 state?

I'm really stucked. I couldn't understand what does Vector3 state. When I look Unity Vector3 documentation it says Representation of 3D vectors and points. ...
27 views

### How to check if a particular vector is pointing at X-Y plane or Y-Z plane

As you can observe from the diagram, Vector A is pointing at the Y-Z plane and Vector B is pointing at X-Y plane. Is this possible to find? Am I missing some logic or concept? EDIT: Suppose, Vector B ...
80 views

### Transforming Vector3 points to Vector2

I'm trying to convert a list of Vector3 on Vector2 because I need to put them in a graph like this: The graph is easy to do having the Vector2 list, but I have a non-trivial problem obtaining the ...
44 views

### Given its direction, and another vector that begins at the same point, how can I find the magnitude of that vector using only vector math?

I've solved this using the law of sines, but I was wondering if there's a way to do this with just vector math. Here's a diagram that will hopefully help illustrate what I'm trying to do: Given ...
26 views

### Measure a distance point to point in unity3D?

I tried to measure a distance point to point on my phone screen by using following code ...
18 views

### How to follow an object with the player without stepping out the waypoint line Unity3D?

How to follow an object with the player without stepping out the waypoint line? I added four waypoints with a debug.line and tried doing some simple waypoint mechanic. I wanted the object to move from ...
61 views

### Is speed and direction generally combined into one vector, or separated into two?

Couldn't find this answered already, surprisingly. For example, for a game (in my case a 2D top-down one), there could be advantages to doing so. For example, whenever you want to change an entity's ...
52 views

### How to perform a sliding collision between a square and a circle?

Please point me to the duplicate if this has been asked before. I couldn't find it. Basically, I am creating a 2d top-down game where the player is represented by a circle, and the tiles are ...
7k views

### How to implement object velocity as a vector

I'm working on a Breakout game, and want to change the ball's movement code from how I currently do it, to something based on vectors (as I feel learning and implementing movement based on vectors ...
41 views

### Make movement speed relative to player character rotation in Unity?

I'm doing a strict topdown 2D game where the character looks at wherever the mouse is pointing (same perspective as GTA 2 or Darkwood) . I want to make movement speed for strafing and backing up ...
267 views

### How to calculate the Forward, Up, Right vectors using the rotation angles?

As the title says, I have the pitch and the yaw of an object, How do i use them to calculate the forward, up, right vectors (like the ones in unity), I've searched everywhere and only could find the ...
41 views

### How do I get my fish to face the right way?

I'm making this 2d collecting game in Unity where you collect fish. However I can't get them to face the direction they are going. I've asked on some Discords and got no answer. Thanks in advance. ...
30 views

### Move vector A to vector B but stop X distance before reaching vector B and always be in front

I believe this is basic vector math, but I'm struggling with it. I have 2 objects (3D space, x, y, z), A (weapon) and B (camera). I want to move A to B's location, but then offset A from B so that it ...
1k views

### Controlling roll rotation when travelling along bezier curves

I am currently working on a curve implementation for use in Unity which includes an editor: The aim is to get an object to follow the path represented by the curve at a constant velocity. Currently ...
40 views

### How to get all tiles along a straight vector path?

Let's say I have a 100x100 map of tiles where each tile is 16x16 pixels. How would I get all tiles along a path? For example, let's say I wanted to get a list of all tiles along the shortest direct ...
185 views

### How can I draw an animated vector field on a map?

I want to render an animated vector field map similar to this wind speed visualization. How can I do this?
37 views

### Where to store polygons and polygon animation?

I thought about making something with ApeOut graphics long before it came out and its release motivated me to try - I'm having tons of fun but I stumbled upon a pickle. I can imagine storing polygons ...
27 views

### Find position in arc depending on the direction of the agent

So what I am trying to do is to find a random point on the (green") arc around the enemy: Sorry for the bad drawing but Red (no go) Green ( Points the allied can go to) I know that unity has ...
14 views

### Unable to get accurate y position on terrain to spawn object

all I am trying to spawn some crabbies and can't seem to get an accurate y height to spawn. I have a terrain created with GAIA Pro 2 and have tried a few things to get an accurate y value. When trying ...
118 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 ...
22 views

### Efficient way to compare vectorial direction?

I have a bunch of random vectors representing a direction and four other vectors that we can distinguish with their pyramidal arrows at their extremity, they represent a boundary what i'd like to do ...
128 views

### How do i put random velocity in a Vector2?

I'm very new to C# scripting. I want to use a random velocity for my Enemies using Vector2. Here's the code that I have done at the moment: ...
298 views

### Can not seem to adjust the speed of my Car

I'm programming in C++, rendering in OpenGL and using GLM for matrix/vector manipulation and ...
26 views

### User input scheme of 2d vector field on a 2d plane for navigation

I want to create a strategy game based on distributions of "units" which can be moved around and attack each other. By distribution of units i mean that i don't have any discrete units ...
55k views

### What are normal, tangent and binormal vectors and how are they used?

I would like to find out the following information: What are they? Example usage in game development (the area they are used in) About the following vector types: ...
19 views

### Moving Object Interception / Projectile Collision [duplicate]

I am using Unity to attempt to have missile A launch at incoming missile B and blow it up. However in order to do this accurately, A must be able to take into account B's current velocity, direction ...