Unity make a missile follow a given trajectory

Im making a game where you can fire missiles at tanks. I want the missile to follow this trajectory:

https://imgur.com/a/bRQ44zq

I have tried a few things but no luck. Does anyone has an idea on how I could achieve this trajectory?

Thanks in advance for any help.

asked Nov 14 '18 at 14:29

jason devers

what are the axis stand for in your image?

– TheMri
Nov 14 '18 at 14:32

Try using Vector3.Slerp (there is example in API Refrenece), but you still need some calculations for center and arc angle.

– Morasiu
Nov 14 '18 at 14:58

@TheMri the axis stand for x = distance and y = is height.

– jason devers
Nov 19 '18 at 9:31

add a comment |

Im making a game where you can fire missiles at tanks. I want the missile to follow this trajectory:

https://imgur.com/a/bRQ44zq

I have tried a few things but no luck. Does anyone has an idea on how I could achieve this trajectory?

Thanks in advance for any help.

asked Nov 14 '18 at 14:29

jason devers

what are the axis stand for in your image?

– TheMri
Nov 14 '18 at 14:32

Try using Vector3.Slerp (there is example in API Refrenece), but you still need some calculations for center and arc angle.

– Morasiu
Nov 14 '18 at 14:58

@TheMri the axis stand for x = distance and y = is height.

– jason devers
Nov 19 '18 at 9:31

add a comment |

Im making a game where you can fire missiles at tanks. I want the missile to follow this trajectory:

https://imgur.com/a/bRQ44zq

I have tried a few things but no luck. Does anyone has an idea on how I could achieve this trajectory?

Thanks in advance for any help.

asked Nov 14 '18 at 14:29

jason devers

Im making a game where you can fire missiles at tanks. I want the missile to follow this trajectory:

https://imgur.com/a/bRQ44zq

I have tried a few things but no luck. Does anyone has an idea on how I could achieve this trajectory?

Thanks in advance for any help.

unity3d

asked Nov 14 '18 at 14:29

jason devers

asked Nov 14 '18 at 14:29

jason devers

asked Nov 14 '18 at 14:29

jason devers

asked Nov 14 '18 at 14:29

jason devers

asked Nov 14 '18 at 14:29

jason devers

what are the axis stand for in your image?

– TheMri
Nov 14 '18 at 14:32

Try using Vector3.Slerp (there is example in API Refrenece), but you still need some calculations for center and arc angle.

– Morasiu
Nov 14 '18 at 14:58

@TheMri the axis stand for x = distance and y = is height.

– jason devers
Nov 19 '18 at 9:31

add a comment |

what are the axis stand for in your image?

– TheMri
Nov 14 '18 at 14:32

Try using Vector3.Slerp (there is example in API Refrenece), but you still need some calculations for center and arc angle.

– Morasiu
Nov 14 '18 at 14:58

@TheMri the axis stand for x = distance and y = is height.

– jason devers
Nov 19 '18 at 9:31

what are the axis stand for in your image?

– TheMri
Nov 14 '18 at 14:32

Try using Vector3.Slerp (there is example in API Refrenece), but you still need some calculations for center and arc angle.

– Morasiu
Nov 14 '18 at 14:58

@TheMri the axis stand for x = distance and y = is height.

– jason devers
Nov 19 '18 at 9:31

add a comment |

1 Answer
1

active

oldest

votes

You should search for: ballistics, cannon, ballistics physics, ball parabola, etc.

Here is an example of of shooting ball at transform:
https://answers.unity.com/questions/148399/shooting-a-cannonball.html

I don't have Unity open right now, so I can't give you full code. By the way, try to change the code below for your own use and let me know in comments.

 function BallisticVel(target: Transform, angle: float): Vector3 {

     var dir = target.position - transform.position;  // get target direction

     var h = dir.y;  // get height difference

     dir.y = 0;  // retain only the horizontal direction

     var dist = dir.magnitude ;  // get horizontal distance

     var a = angle * Mathf.Deg2Rad;  // convert angle to radians

     dir.y = dist * Mathf.Tan(a);  // set dir to the elevation angle

     dist += h / Mathf.Tan(a);  // correct for small height differences

     // calculate the velocity magnitude

     var vel = Mathf.Sqrt(dist * Physics.gravity.magnitude / Mathf.Sin(2 * a));

     return vel * dir.normalized;

 }



 var myTarget: Transform;  // drag the target here

 var cannonball: GameObject;  // drag the cannonball prefab here

 var shootAngle: float = 30;  // elevation angle



 function Update(){

     if (Input.GetKeyDown("b")){  // press b to shoot

         var ball: GameObject = Instantiate(cannonball, transform.position, Quaternion.identity);

         ball.rigidbody.velocity = BallisticVel(myTarget, shootAngle);

         Destroy(ball, 10);

     }

 }

edited Nov 15 '18 at 6:09

Eliasar

600515

answered Nov 14 '18 at 15:06

victor dabija

50619

From their diagram it would seem that the OP wants to include the effects of air resistance.

– meowgoesthedog
Nov 14 '18 at 15:46

well, in that case there is a magic page on wikipedia for ballistics. The code isn't changing so much. It have to consider rigidbody's drag if you want air resist.

– victor dabija
Nov 14 '18 at 15:56

Even the simplest drag-inclusive case is significantly more complex than the drag-less one.

– meowgoesthedog
Nov 14 '18 at 16:52

@meowgoesthedog i'm not getting your point (btw i really don't think the guy want air resistance)

– victor dabija
Nov 15 '18 at 9:03

In vacuum the curves should be symmetric parabolas, but they are assymetric and steeper at the end, which corresponds to air resistance. The functional form for the case with air resistance is different.

– meowgoesthedog
Nov 15 '18 at 9:07

|
show 2 more comments

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

You should search for: ballistics, cannon, ballistics physics, ball parabola, etc.

Here is an example of of shooting ball at transform:
https://answers.unity.com/questions/148399/shooting-a-cannonball.html

I don't have Unity open right now, so I can't give you full code. By the way, try to change the code below for your own use and let me know in comments.

 function BallisticVel(target: Transform, angle: float): Vector3 {

     var dir = target.position - transform.position;  // get target direction

     var h = dir.y;  // get height difference

     dir.y = 0;  // retain only the horizontal direction

     var dist = dir.magnitude ;  // get horizontal distance

     var a = angle * Mathf.Deg2Rad;  // convert angle to radians

     dir.y = dist * Mathf.Tan(a);  // set dir to the elevation angle

     dist += h / Mathf.Tan(a);  // correct for small height differences

     // calculate the velocity magnitude

     var vel = Mathf.Sqrt(dist * Physics.gravity.magnitude / Mathf.Sin(2 * a));

     return vel * dir.normalized;

 }



 var myTarget: Transform;  // drag the target here

 var cannonball: GameObject;  // drag the cannonball prefab here

 var shootAngle: float = 30;  // elevation angle



 function Update(){

     if (Input.GetKeyDown("b")){  // press b to shoot

         var ball: GameObject = Instantiate(cannonball, transform.position, Quaternion.identity);

         ball.rigidbody.velocity = BallisticVel(myTarget, shootAngle);

         Destroy(ball, 10);

     }

 }

edited Nov 15 '18 at 6:09

Eliasar

600515

answered Nov 14 '18 at 15:06

victor dabija

50619

From their diagram it would seem that the OP wants to include the effects of air resistance.

– meowgoesthedog
Nov 14 '18 at 15:46

well, in that case there is a magic page on wikipedia for ballistics. The code isn't changing so much. It have to consider rigidbody's drag if you want air resist.

– victor dabija
Nov 14 '18 at 15:56

Even the simplest drag-inclusive case is significantly more complex than the drag-less one.

– meowgoesthedog
Nov 14 '18 at 16:52

@meowgoesthedog i'm not getting your point (btw i really don't think the guy want air resistance)

– victor dabija
Nov 15 '18 at 9:03

In vacuum the curves should be symmetric parabolas, but they are assymetric and steeper at the end, which corresponds to air resistance. The functional form for the case with air resistance is different.

– meowgoesthedog
Nov 15 '18 at 9:07

|
show 2 more comments

You should search for: ballistics, cannon, ballistics physics, ball parabola, etc.

Here is an example of of shooting ball at transform:
https://answers.unity.com/questions/148399/shooting-a-cannonball.html

I don't have Unity open right now, so I can't give you full code. By the way, try to change the code below for your own use and let me know in comments.

 function BallisticVel(target: Transform, angle: float): Vector3 {

     var dir = target.position - transform.position;  // get target direction

     var h = dir.y;  // get height difference

     dir.y = 0;  // retain only the horizontal direction

     var dist = dir.magnitude ;  // get horizontal distance

     var a = angle * Mathf.Deg2Rad;  // convert angle to radians

     dir.y = dist * Mathf.Tan(a);  // set dir to the elevation angle

     dist += h / Mathf.Tan(a);  // correct for small height differences

     // calculate the velocity magnitude

     var vel = Mathf.Sqrt(dist * Physics.gravity.magnitude / Mathf.Sin(2 * a));

     return vel * dir.normalized;

 }



 var myTarget: Transform;  // drag the target here

 var cannonball: GameObject;  // drag the cannonball prefab here

 var shootAngle: float = 30;  // elevation angle



 function Update(){

     if (Input.GetKeyDown("b")){  // press b to shoot

         var ball: GameObject = Instantiate(cannonball, transform.position, Quaternion.identity);

         ball.rigidbody.velocity = BallisticVel(myTarget, shootAngle);

         Destroy(ball, 10);

     }

 }

edited Nov 15 '18 at 6:09

Eliasar

600515

answered Nov 14 '18 at 15:06

victor dabija

50619

From their diagram it would seem that the OP wants to include the effects of air resistance.

– meowgoesthedog
Nov 14 '18 at 15:46

well, in that case there is a magic page on wikipedia for ballistics. The code isn't changing so much. It have to consider rigidbody's drag if you want air resist.

– victor dabija
Nov 14 '18 at 15:56

Even the simplest drag-inclusive case is significantly more complex than the drag-less one.

– meowgoesthedog
Nov 14 '18 at 16:52

@meowgoesthedog i'm not getting your point (btw i really don't think the guy want air resistance)

– victor dabija
Nov 15 '18 at 9:03

In vacuum the curves should be symmetric parabolas, but they are assymetric and steeper at the end, which corresponds to air resistance. The functional form for the case with air resistance is different.

– meowgoesthedog
Nov 15 '18 at 9:07

|
show 2 more comments

You should search for: ballistics, cannon, ballistics physics, ball parabola, etc.

Here is an example of of shooting ball at transform:
https://answers.unity.com/questions/148399/shooting-a-cannonball.html

I don't have Unity open right now, so I can't give you full code. By the way, try to change the code below for your own use and let me know in comments.

 function BallisticVel(target: Transform, angle: float): Vector3 {

     var dir = target.position - transform.position;  // get target direction

     var h = dir.y;  // get height difference

     dir.y = 0;  // retain only the horizontal direction

     var dist = dir.magnitude ;  // get horizontal distance

     var a = angle * Mathf.Deg2Rad;  // convert angle to radians

     dir.y = dist * Mathf.Tan(a);  // set dir to the elevation angle

     dist += h / Mathf.Tan(a);  // correct for small height differences

     // calculate the velocity magnitude

     var vel = Mathf.Sqrt(dist * Physics.gravity.magnitude / Mathf.Sin(2 * a));

     return vel * dir.normalized;

 }



 var myTarget: Transform;  // drag the target here

 var cannonball: GameObject;  // drag the cannonball prefab here

 var shootAngle: float = 30;  // elevation angle



 function Update(){

     if (Input.GetKeyDown("b")){  // press b to shoot

         var ball: GameObject = Instantiate(cannonball, transform.position, Quaternion.identity);

         ball.rigidbody.velocity = BallisticVel(myTarget, shootAngle);

         Destroy(ball, 10);

     }

 }

edited Nov 15 '18 at 6:09

Eliasar

600515

answered Nov 14 '18 at 15:06

victor dabija

50619

You should search for: ballistics, cannon, ballistics physics, ball parabola, etc.

Here is an example of of shooting ball at transform:
https://answers.unity.com/questions/148399/shooting-a-cannonball.html

I don't have Unity open right now, so I can't give you full code. By the way, try to change the code below for your own use and let me know in comments.

 function BallisticVel(target: Transform, angle: float): Vector3 {

     var dir = target.position - transform.position;  // get target direction

     var h = dir.y;  // get height difference

     dir.y = 0;  // retain only the horizontal direction

     var dist = dir.magnitude ;  // get horizontal distance

     var a = angle * Mathf.Deg2Rad;  // convert angle to radians

     dir.y = dist * Mathf.Tan(a);  // set dir to the elevation angle

     dist += h / Mathf.Tan(a);  // correct for small height differences

     // calculate the velocity magnitude

     var vel = Mathf.Sqrt(dist * Physics.gravity.magnitude / Mathf.Sin(2 * a));

     return vel * dir.normalized;

 }



 var myTarget: Transform;  // drag the target here

 var cannonball: GameObject;  // drag the cannonball prefab here

 var shootAngle: float = 30;  // elevation angle



 function Update(){

     if (Input.GetKeyDown("b")){  // press b to shoot

         var ball: GameObject = Instantiate(cannonball, transform.position, Quaternion.identity);

         ball.rigidbody.velocity = BallisticVel(myTarget, shootAngle);

         Destroy(ball, 10);

     }

 }

edited Nov 15 '18 at 6:09

Eliasar

600515

answered Nov 14 '18 at 15:06

victor dabija

50619

edited Nov 15 '18 at 6:09

Eliasar

600515

edited Nov 15 '18 at 6:09

Eliasar

600515

edited Nov 15 '18 at 6:09

Eliasar

600515

answered Nov 14 '18 at 15:06

victor dabija

50619

answered Nov 14 '18 at 15:06

victor dabija

50619

answered Nov 14 '18 at 15:06

victor dabija

50619

From their diagram it would seem that the OP wants to include the effects of air resistance.

– meowgoesthedog
Nov 14 '18 at 15:46

well, in that case there is a magic page on wikipedia for ballistics. The code isn't changing so much. It have to consider rigidbody's drag if you want air resist.

– victor dabija
Nov 14 '18 at 15:56

Even the simplest drag-inclusive case is significantly more complex than the drag-less one.

– meowgoesthedog
Nov 14 '18 at 16:52

@meowgoesthedog i'm not getting your point (btw i really don't think the guy want air resistance)

– victor dabija
Nov 15 '18 at 9:03

In vacuum the curves should be symmetric parabolas, but they are assymetric and steeper at the end, which corresponds to air resistance. The functional form for the case with air resistance is different.

– meowgoesthedog
Nov 15 '18 at 9:07

|
show 2 more comments

From their diagram it would seem that the OP wants to include the effects of air resistance.

– meowgoesthedog
Nov 14 '18 at 15:46

well, in that case there is a magic page on wikipedia for ballistics. The code isn't changing so much. It have to consider rigidbody's drag if you want air resist.

– victor dabija
Nov 14 '18 at 15:56

Even the simplest drag-inclusive case is significantly more complex than the drag-less one.

– meowgoesthedog
Nov 14 '18 at 16:52

@meowgoesthedog i'm not getting your point (btw i really don't think the guy want air resistance)

– victor dabija
Nov 15 '18 at 9:03

In vacuum the curves should be symmetric parabolas, but they are assymetric and steeper at the end, which corresponds to air resistance. The functional form for the case with air resistance is different.

– meowgoesthedog
Nov 15 '18 at 9:07

From their diagram it would seem that the OP wants to include the effects of air resistance.

– meowgoesthedog
Nov 14 '18 at 15:46

well, in that case there is a magic page on wikipedia for ballistics. The code isn't changing so much. It have to consider rigidbody's drag if you want air resist.

– victor dabija
Nov 14 '18 at 15:56

Even the simplest drag-inclusive case is significantly more complex than the drag-less one.

– meowgoesthedog
Nov 14 '18 at 16:52

@meowgoesthedog i'm not getting your point (btw i really don't think the guy want air resistance)

– victor dabija
Nov 15 '18 at 9:03

In vacuum the curves should be symmetric parabolas, but they are assymetric and steeper at the end, which corresponds to air resistance. The functional form for the case with air resistance is different.

– meowgoesthedog
Nov 15 '18 at 9:07

|
show 2 more comments

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