Questions tagged [projectile-physics]

The motion physics of the objects sailing through the air, ranging from thrown baseballs to battleship cannonfire to falling rocks.

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1answer
71 views

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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1answer
31 views

Find projectile initial velocity, and air time, given projectile elevation, distance, angle

I have a target X position (D). I have a turret Y elevation (E). Turret is always pointed at 45 degrees (A). I need to calculate the initial projectile velocity required to hit the target, with an ...
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1answer
49 views

How to predict where the soccer ball should be intercepted by an AI player after being kicked?

This question has been asked many times before, but most of the answers give solution to the problem where ball (target) is assumed to be moving at a constant velocity. In my scenario, I'm making a ...
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1answer
27 views

How to create a projectile path in unity using physics

I want to create a jump function that launches a RigidBody2D along a low, long, trajectory. In the following examples, I have set the linear and angular drag to 0, to eliminate any possibility of ...
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26 views

Optimize spawn & destroy? (Unreal Engine)

I'd really like to know how you'd go about optimizing this? 20 actors each spawning 8 projectiles per 0.1 sec which are then destroyed 0.8 seconds later, all done through blueprints Gif: https://gyazo....
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1answer
64 views

My bullets won't bounce in Unity?

I wanted bullets to bounce when they hit walls. However when colliding with a wall, they just jitter about on them. I didn't want to create a new physics material as I want to keep the ball moving at ...
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0answers
21 views

How do I calculate the required force to launch an object? [duplicate]

I want to use a rigidbody AddForce() method on an object to launch it over from the enemy to the player, like throwing a ball at a target. The problem is, I'm not ...
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1answer
28 views

Rotating projectile in direction it is moving

I am using a parabola curve to launch my arrows: ...
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1answer
40 views

OnTriggerEnter works…sometimes

I was working on a small game in which you shoot projectiles towards various targets, now I decide to use OnTriggerEnter instead of OnCollisionEnter because OnCollisionEnter adds a slight force to the ...
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1answer
34 views

Apply impulse in direction line is pointing with force proportional to the length of line

I have a line perpetually pointed at the mouse and originating at the player, but the length is limited to a certain value. I also can create a circular object on demand in Box2D (specifically the ...
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1answer
37 views

How can velocity be normalized after a collision if a projectile needs to maintain its height?

I want a thrown disc to travel along the same height, even after collisions. The problem is, there's an edge case that I'm not sure how to deal with. The lowest-tech solution would probably be to ...
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1answer
196 views

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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1answer
49 views

AddForce results in stuttering movement

I'm currently developing a simple breakout/arkanoid mobile game. Now, I noticed that my ball movement is noticably stuttering. I've read various approaches about how to make the ball move and decided ...
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1answer
73 views

How do I account for the velocity difference between a ship and it's fired projectile?

In my project, I have a ship that moves and increases it's movement speed with respect to time and how long the acceleration button is being pushed(just like the way a real life car works), now as ...
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1answer
94 views

Shoot projectile same direction weapon faces

I want to be able to shoot a projectile from a weapon mounted on a vehicle. Right now I am able to do it but only in front of the vehicle. I managed to rotate the weapon to the direction the mouse is ...
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0answers
52 views

How to vary the initial velocity of a jump based on hold time?

What I want to do is, the longer player holds the screen, the longer distance the object will jump when they release the hold. Here is my code: ...
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1answer
44 views

Find the direction a Projectile should be fired from a Moving Object to hit another moving Object?

I am trying to do a simple AI Controller, which fires Missiles at the surrounding targets in the Scene. The AI Controller can fire projectiles when moving or stationary. The Targets are either ...
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1answer
578 views

How to make a smooth projectile in roblox?

I am trying to make a projectile (Energy ball) for my game. I am using body velocities, but the issue is is that it seems laggy. I shoot it then half a second through flight it seems to stop in mid ...
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1answer
154 views

What is a “Projectile”?

I don't know what a Projectile os. I'm not sure whether a Projectile is a spawn point which spawn a number of object or a number of multiple objects. I'm referring to this website. How do I use ...
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2answers
226 views

How do I launch a ballistic projectile to hit a moving target, given: launch position & angle, target position & velocity?

This problem is in 3D space. My question is: How do you find the initial velocity of a projectile that flies under constant gravity, so that it hits a target moving with constant velocity, given the ...
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0answers
29 views

Why is not the projectile going toward the target?

I have a project where I can shoot (with a simple projectile). Character Blueprint (generate projectile): However I would like to be able to make the projectile go towards a specific target. ...
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1answer
149 views

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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1answer
618 views

Draw trajectory arc predictor in game

I found this tutorial on youtube and it works pretty well, but I want to add more to it. How can I draw a smooth arc path in the game view (right now the path is only visible in the editor)? Here ...
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1answer
28 views

Bullet Projectile Verticle Rotation

I'm very new to C# and Unity, and have been working on a projectile based weapon, and for the most part it's been working well. However, although the bullet fires facing the direction it's being shot ...
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3answers
828 views

Javelin throw projectile motion

I am trying to simulate throw of javelin using projectile motion. The basic physics of projectile motion of a point was used to position the javelin. For the rotation part, I just assumed that the ...
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2answers
96 views

Pushing Rigidbody forward doesn't go straight

I have a object that pushing rigidbody forward when it's instantiated: ...
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2answers
212 views

how to calculate initial Y velocity required to reach target?

I am trying to calculate the y velocity necessary for my player character to jump up and reach a y position within 1 second. Given that my game engine is at 60fps, I am doing: ...
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3answers
618 views

how to predict where a ball will land?

For a game of table tennis, the goal is that when the player hits the ball, the opponent (the computer) will move to the position where the ball will land in order to hit it back to the player. Said ...
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0answers
116 views

Projectile initial motion to hit a target position

I'm working on a 3D game where i need to shoot a projectile (arrow) in order to hit a target position. The projectile has an origin position and a motion vector v(t) where "t" is a time unit. v(t) ...
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2answers
73 views

Applied force is backward instead of forward when shooting an object

I have this FPS I'm making and I wanted to apply force to objects I shoot at however when I shoot on them, instead of going away from the camera they come towards it. I don't get it. I could fix the ...
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1answer
247 views

Projectiles in FPS games - OpenGL

I have some experience with Blender, but now I am using Xcode 9.2 and OpenGL 4.1 on MacBook Pro. I am also attending a couple of online courses on edX. I am developing (for fun and as an exercise) a ...
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1answer
85 views

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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0answers
384 views

Unity - How to calculate max distance (range) of a Projectile taking drag into account?

I am able to calculate the projectile max distance, but it only works when there is no drag applied on the spherical projectile. I used the formula for range of a projectile as follows:- ...
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1answer
6k views

Shooting projectiles towards mouse position in Unity 2D

I'm currently creating a scrip that handles the projectile movement and it's almost where I want it to be. Currently the script correctly instantiates the projectiles, moves the projectiles towards ...
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2answers
3k views

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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1answer
6k views

Rifle bullets/projectiles in Unity, raycasting or rigidbody?

Hello again gamedevers :) I'm trying to create a fairly simple FPS shooter game. Im using a Rigidbody FPS Controller prefab from ...
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1answer
41 views

How can I reference the frontmost part of a mesh in my Unity code? (and help making FPS projectiles seem more real)

I have started making a PC game using Unity. It's just a test project, where I'm making as basic as possible FPS shooter. I'm using the FPS Controller prefab, and I have also a rifle model attached ...
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1answer
88 views

Firing a simple sphere from below the camera at crosshair in the centre of the screen, with or without raycast

I have a game that spawns "enemies" within a sphere around the camera, the player moves the camera to target and simply presses the screen to fire. For now my "ammo" is simply a sphere and for visual ...
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1answer
929 views

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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0answers
223 views

Getting launch angle for projectile given height, distance and speed in 3D [duplicate]

EDIT: This is not a duplicate as the proposed solution does not seem to work. See the bottom of this question for clarification. I am trying to calculate the launch velocity of a ball that needs to ...
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3answers
649 views

Why aren't game bullets implemented as if they were real bullets?

Let's say I'm working on a 3D first-person shooter and the boss is a stickler for realism, and orders me to implement the bullets as tiny projectiles that travel, say, 1000 meters per second. What ...
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0answers
64 views

why collision not detection not happened in Two Sphere

I start practice 3d collision detection of sphere in OpenGl containing two sphere one sphere hit using cannon gun but collision not detect when it hit and when i debug code collision statement triger ...
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1answer
235 views

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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2answers
280 views

Best practice for RTS accuracy/aim

As I'm developing a RTS game set during the Napoleonic Campaign, I've got a question about the best method to implement 'bad aim' for the AI, as the accuracy of muskets were quite terrible back then. ...
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2answers
118 views

Scrolling background after firing projectile

I have a projectile which I fire using the mouse coords as the direction vector which I scale with a velocity vector and add a gravity vector to complete this simple simulation. I want to scroll the ...
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1answer
455 views

How to set rotation of a projectile in a parabolic arc in Box2D? [duplicate]

I have trouble making my projectile - in this case an arrow - rotate as it should when it's travelling in a parabolic arc. It doesn't rotate at all while travelling, only until it collides with ...
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1answer
618 views

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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1answer
787 views

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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1answer
504 views

How to calculate the ideal hit of arrow?

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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1answer
2k views

How to create a projectile motion of a cannonball in top down view?

Objective To move the bullet with projectile motion to specific destination by touch point. In the below image is an example of a bullet which has a projectile motion. On my observation, the bullet ...