# Tagged Questions

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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### 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 ...
26 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 question here to determine the ...
63 views

### 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 ...
246 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 like shown below. Trajectory with ...
148 views

### 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 ...
263 views

### How can I launch a GameObject at a target if I am given everything except for its launch angle?

I have been working on this one for a few weeks, and I have yet to succeed. I have searched every resource out there, and tried them all, but still without success, so I do not believe existing links ...
187 views

### How can I shoot an arrow if I know the shot power and target?

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 ...
243 views

### 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 ...
327 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 ...
44 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 ...
108 views

### 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 ...
441 views

### 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 ...
398 views

### 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: acceleration += swerve × ...
129 views

### 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 ...
921 views

### 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 ...
947 views

### 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 ...
165 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 ...
336 views

### 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 ...
927 views

### 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 ...
2k views

### 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 ...
120 views

### 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 ...
177 views

### 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 ...
142 views

### 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 ...
454 views

### 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.)
10k views

### 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 ...
256 views

### 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 ...
4k views

### 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 infinity sign trajectory?
2k views

### How to make an arrow land at a specific position in 3D world space

In my game when I click with the mouse on the terrain somewhere, I'd like the player to fire an arrow to that position in a parabolic fashion. The arrow has a position, acceleration and velocity all ...
572 views

### Simplified trajectory equation to identify Time Taken(t) by a protectile to travel Distance(d), under gravity?

I am building a game, where I have to plot a trajectory of a ball in 3D space, launched with an inital velocity Sx, Sy, Sz. [I am using OpenGL and Android-NDK] Lets assume Sz is always 0. And Sx ...
433 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 ...
940 views

### Calculating missile trajectory around orbits before shooting

I'm building a game with Unity3D. It's a Gravity Wars clone. Both player and AI turrets shoot missiles at each other (giving an Angle and a Power variables), trying not to crash missiles on planets. ...
2k views

### How does one avoid the “staircase effect” in pixel art motion?

I am rendering sprites at exact pixel coordinates to avoid the blurring effect caused by antialiasing (the sprites are pixel-art and would look awful if filtered). However, since the movement of the ...