# Questions tagged [trajectory]

The path that a moving object follows through space as a function of time. It can be described mathematically either by the geometry of the path, or as the position of the object over time.

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### Detecting collisions with trajectories

What if an object were to have collision detection implemented as so: A ray in the direction the object is moving in, and a ray in the direction of gravity.
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### How can I draw a trajectory of an orbit?

With the following code, I either get a straight line or no line at all. I have tried almost the same thing in Unity and I get something that looks like orbiting, but here I get nothing. How can I fix ...
208 views

### Calculate angle for arrow tip to hit a point

For an archer in my game, I want to calculate the launch angle to hit a point (x,y) when fired from (0,0). The initial power is known, so I use the following formula: https://en.wikipedia.org/wiki/...
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### How to make mouse pointer be the vertex of a drawn parabola when estimating the trajectory of a projectile?

I'm trying to remake an old flash game using Unity. The main mechanic of the game is to make the basketball pass over the mouse. Here's a video of the game: https://www.youtube.com/watch?v=6sArMC1l_Sc ...
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### How to calculate trajectory on a planet with drag factor

I'm curious what is the valid calculation of a projectile trajectory in case when: surface is not flat but spherical like a planet drag is enabled (for example 0.1) and we are in 3D I've found ...
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### Aircraft trajectory prediction

I have an aircraft that is controlled by player and i need to predict it's position at needed time. It's not a problem if the plane is just moving straight but most of the time aircraft is maneuring. ...
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1 vote
423 views

### How to calculate tangents in beam data to fit given trajectory

I'm currently trying to create a trajectory effect (in UE 4.25.1) similar to one from the last of us: I have created a beam with niagara, which lets me determine the starting point of the beam, ...
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### How to make parabolic jump from a to b to c and so on?

I want to make a game similar to "Dancing HOP: Tiles Ball EDM Rush" I am trying to make an object jump from point a(z=0) to b(z=10) to c(z=20) and so on, keeping the z axis distance constant for each ...
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### Emulating 3d trajectory in top-down 2d game?

As the title suggests, I am wondering if it's possible to emulate a 3d arrow trajectory to a top-down 2d game? If you would look at this clip of Age of Empires 2 game, especially when archers are ...
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1 vote
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### How to make a gameObject follow non trivial trajectories?

as the title of the question says, I was wondering if there is common method to make gameObjects e.g. enemies or bullets follow curvilinear trajectories before reaching their target. For instance, ...
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### help with shooting projectile along a curve path

so i been trying to find a way to shoot projectiles along a curve path . and i found this tutorial on youtube which was really good. i also uploaded the project in case you wanted to check it out. ...
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1 vote
209 views

### Calculate velocity to hit the target on flat 2d surface

I am creating a game using Python and Pygame. I have used this function before (with JS with p5.js and Java with libwjgl, but for some reason it does not work with pygame (I am not sure if it matters ...
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### How to randomly calculate the necessary velocity changes to reach a x,y,z target?

I am working on creating a mini vector graphics ping pong table, as described in this previous post: Trying to use 3D vectors for a 2D ping pong game Currently, the stage I am at, I am trying to make ...
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### Projectile Aim Prediction with Acceleration

I'm trying to solve the classic shoot moving object problem but with acceleration attached to that changes it from a quadratic to quartic formula but my math skills are not this good sadly as i prefer ...
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### Required initial velocity (fixed launch angle) for projectile to hit a target

The scenario: I have an enemy tank (AI) chasing my friendly tank (player). When the enemy gets close enough he tries to shoot the player. Now the enemy prefab has an empty game object attached as a ...
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1 vote
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### How can I move and rotate an object in an “infinity” or “figure 8” trajectory?

I know that the easiest way to move an object with the figure 8 trajectory is: x = cos(t); y = sin(2*t) / 2; but I just don't know how to rotate it, lets says ...
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### How can I recreate the movement of arrow in air?

Given two Particles A and B which forms the arrow itself, A.P an edge of it and the opposite one B.P. Like so A.P---------B.P. const float DistArrow = 60; Where ...
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### How to calculate vector of projectile initial velocity

There are point A (origin) and point B (target). And also there is gravity vector G. I need compute initial velocity of projectile (throwing arc trajectory from point A to point B). Also I need to ...
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1 vote
742 views

### How to implement the missile trajectories in the classic missile command game - pygame

I am doing a clone of the classic arcade game missile command, i am curious about how to implement the trajectories of the missiles. I have a solution that looks pretty similar to the original game, ...
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### Find Initial Velocity for Parabolic Arc with Fixed Angle that Crosses Target Position

In my game I want skeletons to occasionally lob bones at the player. The player can be anywhere in relation to the skeleton (above or below, to the left or right), and I want the skeletons to throw a ...
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### finding the angle to launch a projectile at a 3d coordinates

I have a game where the user can shoot a bullet and the bullet flies through 3 dimensional space and eventually hits the ground somewhere. My question is how can I calculate the ...
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711 views

### How to calculate the ideal hit of arrow? [closed]

I am trying to make the AI shoot an arrow and always hit the target. Assuming that the target is within his range I am stuck what the correct way is to do this. I search and found some solutions but ...
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1 vote
2k views

### How do you convert angle with velocity to x velocity and y velocity?

This question can be simplified to: If you lean a pencil of a certain length at a certain angle what is the x and y position of the tip? So, basically, I am making a game that plots a balls path ...
1 vote
397 views

### How do I take 2D ballistic trajectory planning and apply it to 3D?

I am currently using this formula speed = sqrt((gravity.y*target.x^2)/(2*cos^2(angle)*(target.y - target.x*tan(angle))) provided by DMGregory as an answer for my ...
1 vote
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### Calculate initial velocity for trajectory given duration, launch angle, and distance

I need my entity to go from point A to point B with a given launch angle over a given time. I've been able to figure out the initial velocity without the constraint of the launch angle, but I can't ...
4k views

### Displaying Trajectory Path [closed]

How can I display trajectory path exactly as in this image? I have used void OnDrawGizmos, but that only displays trajectory in the editor and without any arrows ...
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### Calculating initial velocities given trajectory parabola

I'm working on a volleyball game but my maths/physics knowledge isn't quite up to par. I need some help with the following problem: The player can hit the ball from anywhere on the left of the court ...
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### How can I shoot an arrow if I know the shot power and target? [duplicate]

I am trying to shoot an arrow at a target with a 100% success rate. Given the initial force applied to the arrow, the gravity, the location of the archer, and the location of the target, how can I do ...
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### In Unity, how do I make a 3D flight arc preview?

I'm stuck on how to make a preview trajectory for a projectile appear when holding a button. The trajectory should start at a certain position on the scene and end wherever the player points their ...
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626 views

### Projectile Rotation During Flight (Tank Game)

I have a tank firing projectiles into the air. I want the projectiles to be rotated relative to their position along their flight path. See the diagram I drew in the image below. At any given point ...
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119 views

### How can I create a parabola that does not use negative X coordinates

I am currently devloping my first javascript program ever which is a table tennis game. I am trying to create trajectory for the ball to follow when hit - just a very basic parabola. However im not ...
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### How to get a turret to shoot at player in a shmup

I'm developing a basic vertical shoot em up on the DS and am trying to get stationary turrets to shoot at the player in a shoot em up. Early on I simply had them shooting in fixed 8 directions N, S, E ...
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### How to rotate an object along its trajectory path?

I have a missile launcher that uses initial velocity for the trajectory. I edit the launch angle from the editor, and then the script calculates the initial velocity required to land the missile to ...
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### Trajectory of a spinning ball

How do I would precalculate trajectory of a kicked ball, when it's spinning? I'm applying spinning using simplified Magnus effect every frame like this and it works: ...
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### Adding gravity to arrival steering behavior

I trying to write an autopilot for the classic Lunar Lander or its clones. According to this paper, the arrival behavior is exactly what I need for a soft landing. In this example, it accelerates at ...
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### Trajectory Projectile with Collision Detection

Right now I am trying to create projectile for cannon in which I want to detect collision also. At present I have simple working projectile after using two references Unity – How to display ...
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### How can I determine trajectory from distance and time, without initial velocity?

I'm attempting to develop a Mortar that needs to lead it's shot to the target enemy. The shot will have a pre-determined constant flight time of (2.5 seconds) and it will have where the enemy should ...
1 vote
263 views

### Lunar lander: why is my descent module crashing

I've been reading this awesome simulation of the actual Apollo 17 descent: http://www.braeunig.us/apollo/LM-descent.htm I've been trying to make my own simulation using Euler integration, with a time ...
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### Lunar lander: How to calc acceleration in each step

I'm trying to make a lunar lander simulator. I'm going to use a simple Euler integration. AFAIK all I've to calculate is the acceleration in each step, and then I should be able to update velocity and ...
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### Goalkeeper Jumping Algorithm?

This may be a "best way to" question, so may be susceptible to opinion-based answers (which is ok for me). But I would also like if there are any tutorials , research papers , etc. I'm trying to make ...
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### Calculating trajectory

I'm just starting with game development and some physics related to that. Basically I want to calculate a trajectory given an initial velocity and as well as an elevation / angle. So I wrote this code ...
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### Translation over a vector trajectory

I'm working on a particle field system, where the particles can go from a point of the map, to another point of the map, using an angle (with sin and cos). By now, I can calculate the vector by ...
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### How do I have an arrow follow different height parabolas depending on how long the player holds down a key?

i'm trying to throw an arrow in my game, but i'm having a hard time trying to realize how to make a good parabola. What I need: The more you hold "enter" stronger the arrow goes. The arrow angle will ...
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### Particle trajectory smoothing: where to do the simulation?

I have a particle system in which I have particles that are moving to a target and the new targets are received via network. The list of new target are some noisy coordinates of a moving target stored ...
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### How to account for acceleration when aiming projectiles?

How do I aim a constant speed projectile to hit a target if there is a constant acceleration vector acting on it? (For example, the wind and gravity from Worms.)
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### How can I find a projectile's launch angle?

I am making a 2d game in which units fire arrows at each other. I know the shooter's and the target's position and the initial velocity of the projectile. I want to know the angle the projectile ...
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### How do I find realistic 3D paths for stable and unstable flying rockets?

I am building a 3D application that simulates launching small rockets. I want to draw their trajectories. I know that rockets have a degree of stability. I want to include this in the simulation, but ...
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### How can I move an object in an "infinity" or "figure 8" trajectory?

When I want to move object around point I do: point.x *= cosf(timer.timeElapsed); point.y *= sinf(timer.timeElapsed); How to make point move on eight or ...
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