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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3answers
70 views

How to check distance between two different vectors?

So I have a very basic racing game, where I would like the car to stop once it hits the finish line. Respectively when the distance between the car and the finish line hits or goes under 0 the car ...
1
vote
2answers
651 views

Detecting walls or floors in pygame

I am trying to make bullets bounce of walls, but I can't figure out how to correctly do the collision detection. What I am currently doing is iterating through all the solid blocks and if the bullet ...
-2
votes
2answers
45 views

In XNA, how do I make a sprite move towards another?

I am making a shoot-em-up with a player-controlled sprite with a gun: I have most of the game working, but I have gotten to the point where I need to load in the enemy characters and make them move ...
1
vote
1answer
27 views

Unity 5: Would Raycast suffice?

Hello game development pros! I need help with some logic in my script. I created a dynamic day/night cycle that works fine in itself, but lately I've been wanting to add a game clock that works off ...
1
vote
1answer
137 views

Problems with Raycasting Requirements

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 ...
1
vote
1answer
823 views

Spritekit - gradually apply force vector in different direction (space ship turning)

I have a space ship that I'm applying a force vector to using a joystick for control. I would like this to smoothly fly around when I'm switching directions.. Exactly like minisquadron if you've ...
0
votes
1answer
167 views

Controlling roll rotation when travelling along bezier curves [Unity3D]

I am currently working on implementing 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 ...
0
votes
1answer
160 views

Relative Position/Rotation calculation

I have 2 objects each with a 3x3 Matrix (Orientation) and a Vector3 (Translation). Both are relative to world coordinates. How do I calculate the position and orientation of object B in relation to ...
-1
votes
1answer
119 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 I have implemented very (very) basic car controls; ignoring many forces that are present in reality. Since ...
-2
votes
1answer
117 views

How to remove line between two Points XNA 4.0?

I'm new to XNA and wondering if it is possible to remove a line (that lies between two vectors) when the mouse clicks on that line. I've searched everywhere but I can't seem to find anything. My ...
-3
votes
1answer
78 views

Direct raycasting from moving point A and moving Point B

I am attempting to raycast from Point A to Point A (both moving points). I dont understand the comcept of raycasting (direction). Update() { player = GameObject.FindGameObjectWithTag ("Player"); ...
2
votes
0answers
359 views

Quaternion to direction vector - flipping

I've kinda solved this myself by adapting the Camera::setDirection code from OGRE to work for my need: Now I have the following code: Vector3 boneDir = getBoneWorldOrientation(mEntity, mHips) * ...
1
vote
0answers
34 views

Find camera coordinate of vanishing point

Given a vector and a camera (position, angle, up vector, field of view, etc), how would I find the vanishing point of the vector in camera space?
1
vote
0answers
250 views

Aligning a gameObject to position and normal of another gameObject inside Unity

So I am instantiating a GameObject (the one with cities and trees in the image below) and trying to align it to a hex tiles on a Sphere. So after I instantiate the gameObject, I ray-cast to get it ...
1
vote
0answers
189 views

unity3d-Find angle between 3 vector3 points obtained from swipe

I was trying to find the angle between 3 vector3 points obtained from the screen swipe. The first vector3 point is the first touch position fp, the second is some intermediate touch ip and the third, ...
1
vote
0answers
115 views

Rotate Points with Object in world space

I posted this in the original stack overflow then realized that a game-dev specific one exists. I am working on personal project that requires me to have 4 points surrounding an object (1 at each of ...
1
vote
0answers
347 views

Calculate initial velocity of a 3d vector-based projectile

Okay, so I got a Projectile with 2 Vectors, position and velocity. I now want to calculate the initial velocity for it in order to reach a specific point on the map. Or actually, how high has the ...
0
votes
0answers
39 views

how to move an object to the mouse in Java

I have just recently started using Java, literally 2 days ago, and I have run into an issue. While I have been easily able to figure out most of the syntax and methods, because I have used multiple ...
0
votes
0answers
14 views

Screen coordinates to letterboxed view

So I have letter boxing working properly (it's not really important but I'll post that bit of code too), but I'm trying to figure out the point/vector arithmetic for translating (projecting) screen ...
0
votes
0answers
85 views

Kinect wrist yaw angle calculation

I am trying to calculate the wrist yaw for the Kinect. However i don't know enough from Vector algebra to be able to find these correctly. Currently i have been using the following code to hopefully ...
0
votes
0answers
79 views

Steering problem in 2d game

I am creating a little 2D non tiled top down game. The enemy uses steering behaviour for chasing player or wandering around, but I do not think my code is working as it should be. My problem is, the ...
0
votes
0answers
82 views

Matrix, vector multiplications in OpenTK

I developed a 3d model viewer in c++ with OpenGL, and in c# in OpenTK. Both are using the same shader, but the output from OpenTK is not correct. I read that OpenTK is row major order, and OpenGL is ...
0
votes
0answers
53 views

Ray casting: need to find start and end vectors

So I have a 3D object and I'm trying to implement Maximum Intensity Projection on it. I already started of using a default vector to show per pixel, namely: pixelCoord[0] = uVec[0] * (i - ...
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votes
0answers
155 views

Closest distance from 3D point to vector line

First let's have a look at my little drawing: I have an origin point p1 defined by x, y and z co-ordinates, and a vector v given by x, y and z magnitude. I also have an arbitrary point, p2, given ...
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votes
0answers
167 views

How do I find the camera direction vector for 3D sound purposes? (C++, DirectX)

Question I'm trying to make a sound class for playing 3D sound effects with DirectSound and DirectX, without using DirectSound's 3D libraries. The plan is to have every game object constantly play ...
0
votes
0answers
46 views

How to find optimal perpendicular axis of rotation vector to draw arrows?

I am drawing lines on the screen. Each line has a point (x,y,z) and a direction (u,v,w). I want to draw arrow heads on these lines, like two lines that start from (x,y,z) and leave at a 15 degree ...
0
votes
0answers
159 views

How to rotate a line in 3d space?

I am trying to figure out direction vectors of the arrowheads of an arrow. Basically I'm given a normalized direction vector (u,v,w) and I need the normalized direction vectors of the its two arrow ...
0
votes
0answers
73 views

Transform a Screen Delta

I have a delta in screen coordinates that I want to transform to a 3d delta in world space. The delta is in this case a movement across the (x,y) coordinates in screen space on the near projection ...
-2
votes
0answers
21 views

Clamping camera and smooth pan back to target.transform?

I'm looking to have a camera move horizontally, but clamped on the other two axis. Also, I would like, during the horizontal panning, for the camera to have a short delay before smoothly fixating back ...