Rotation is the circular movement of an object around a specific axis.

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38 views

unity3d - Instantiate and fire bullet realtive to player rotation in 3D

This is a top-down view but in 3D coordinates, I would like to instantiate and fire a bullet from the player's gun. This script is on a spawner object at the end of the barrel. Also tried putting the ...
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vote
1answer
53 views

Turn the front wheels of a car according to the car's bezier path

I have a 3D car which follows a predefined 3D Bezier path. I want the car's front wheels' rotation to match the car's changing direction. I had the idea to match the wheel's orientation to the ...
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2answers
35 views

Position child on the edge of the parent circle while scaling unity3d

I have come across to some different situation. I have one circle sprite and i am rotating circle continuously while rotating i want to make circle smaller and larger. I have one object on the edge ...
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1answer
39 views

How do I rotate a cube around an axis, relative to the camera view?

I want to be able to rotate a cube, either by dragging vertically to rotate it around the Y-axis, or dragging horizontally to rotate it around the X-axis. However, when the camera is rotated 90 ...
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1answer
4k views

Why is my sprite displayed offset from its Box2D body?

I found out about this using a debug renderer. When the game starts, everything is in order. But when a collision happens, the sprite's rotation is way larger than its body. The sprite and body match ...
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2answers
85 views

How to stop rotation every 90 degrees?

I was facing another rotation problem yesterday, that i managed to solve by rotating the object like this : transform.Rotate (speed * Time.deltaTime, 0, 0, Space.World); I tried almost every other ...
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0answers
35 views

Rotation problem with Quaternion.Euler in unity [closed]

void Rotate() { Vector3 lastDirectionInGlobal = _camera.ScreenPointToRay(rightFingerLastPoint).direction; Vector3 currentDirectionInGlobal = ...
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1answer
53 views

Unity forward vector flips when upside down. Mario Galaxy style gravity, bad rotation?

This is a question that I think is best to explain visually, so I will do my best to be succinct here. What I am trying to do: Allow the player to run about a world that is spherical, not a flat ...
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1answer
405 views

Jittery Movement, Uncontrollably Rotating + Front of Sprite?

So I've been looking around to try and figure out how I make my sprite face my mouse. So far the sprite moves to where my mouse is by some vector math. Now I'd like it to rotate and face the mouse as ...
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0answers
24 views

swap rotation problem in mobile game (unity) [closed]

using UnityEngine; using System.Collections; [RequireComponent (typeof (CharacterController))] public class Camera_rotation_onSwap : MonoBehaviour { public bool kJoystikEnabled = true; public float ...
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1answer
45 views

Calculate 3D “up” vector to align ship to an arbitrary axis

I'm writing a script to control the movement of a 3D ship in a game. Given the ship's position and the coordinates of the destination, I've successfully calculated the Yaw and Pitch necessary to aim ...
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26 views

Rotate the camera on a given angle

Good day! I apologize in advance for my bad english. The task is as follows: "On the stage there is a camera and a gun with rays when a ray gun out of sight of the camera (vertical) is required to ...
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2answers
82 views

How do I rotate and object around itself, and translate it at the same time?

I have this animated gif of my problem. I have a sprite object with a box collider, and I'm trying to rotate it around its center. My rotation script consists of this : this.transform.Rotate (0, 0, ...
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votes
2answers
90 views

Translating an object in the rotation direction

I am creating a graphical scene with OpenGL and SDL, and I'm running into a problem in regards to translating an object in its rotation direction. Each of the graphical objects in the scene has a ...
0
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1answer
147 views

Lookrotation of a gameObject in just one axis

So I am trying to orient a gameObject ( house in the picture below) which is nothing but a plane and has a 2d texture on it as you see below. The whole game is made on a hex sphere. I am using ...
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2answers
34 views

Combining two independent rotations relative to the world frame

I am implementing a mouse rotation which works by accumulating the X-Y delta between frames to yaw and pitch rotation angles. The problem is that I wish rotations to be independent of each other. But ...
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3answers
79 views

How to rotate a gameobject to the specific angle

I have tree model that is being rotating .After certain angle it should stop rotating.I have done a sample code.But the tree is not stopping. void Update () { //transform.Rotate ...
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2answers
46 views

Problems with Rotation Matrices on Certain Axes

Here is what my rotation matrix looks like: public Matrix4f initRotation(float x, float y, float z) { Matrix4f rx = new Matrix4f(); Matrix4f ry = new Matrix4f(); Matrix4f rz = new ...
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1answer
45 views

How to create a smooth rotation with a constant angle?

I am trying to make a game where the player can only rotate to 4 angles. Something like this I cannot use Quaternion.Rotatetowards because the player's position is not constant, but I don't have the ...
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1answer
33 views

How to modify the Unity sprite renderer (or create a custom one) that can display the sprites on the X-Z plane?

Prefix: I am NOT trying to rotate a sprite 90 degrees by it's transform, this changes what is up/down and forward/backwards for the object. I need the sprite displayed on the X-Z plane in comparison ...
1
vote
1answer
53 views

Determine which face of a cube is facing the camera

I have a Cube with a unique color for each face. I made a script where I can swipe and rotate the Cube in increments of 90 degrees in each direction. what's the best way to determine which face of a ...
0
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2answers
49 views

Gradual rotation of an object in Java

I'm using Java to learn some movement algorithm. I would like to implement the "wandering" algorithm, but in order to do it, i should understand how to rotate an Object gradually. Actually, my Player ...
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1answer
234 views

Camera lookAt target changes when rotating parent node

have the following issue.I have a camera with lookAt method which works fine.I have a parent node to which I parent the camera.If I rotate the parent node while keeping the camera lookAt the target , ...
0
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1answer
114 views

Incomplete mesh using DrawIndexedPrimitives after rotating mesh

Through help on this site I was able to draw the triangles of an unrotated, nonscaled nontransformed mesh created in Blender and exported to OBJ, accurately imported through Assimp and rendered in XNA ...
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1answer
52 views

Why is rotation not applied instantly?

I am working though the Space Shoot tutorial and I have just applied tilt to the player object. One of the things that I have noticed is that the tilt is not applied instantly but instead the player ...
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votes
2answers
72 views

How do I keep my orbiting camera upright?

I am working on code that rotates the camera around a point on the in-game map when dragging the mouse. I understand how to lock it so it stays above the map surface. However, if I keep rotating the ...
0
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1answer
77 views

Rotate Object Towards Direction in 2D

For my RTS game's physics engine, I'm trying to find out a clever way to make a unit face the direction it's moving in. Given a Vector2d direction of movement (its normalized velocity), how can I ...
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2answers
82 views

How to rotate (YAW) aircraft in XNA?

I'm developing a flight simulator based on Riemer's Blog tutorial (XNA C#). To control the aircraft, I use the following code: Quaternion additionalRotation = Quaternion.Identity; additionalRotation ...
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vote
2answers
690 views

Matrix rotation wrong orientation LibGDX

I'm having a problem with matrix rotation in libgdx. I rotate it using the method matrix.rotate(Vector3 axis, float angle) but the rotation happens in the model orientation and I need it happens in ...
0
votes
1answer
703 views

How do I determine the look-at vector of a free-look camera?

I'm trying to create a free-look camera with DirectX 10. I've figured out how to get the directions for forward and back and left to right. However, I don't know how to rotate the look-at vector of ...
2
votes
1answer
142 views

Get quaternion between two objects on sphere

In a planetary gravity environment objects are represented in the following way: struct object { struct quaternion quat; // quaternion to represent the rotation between the object and the center ...
0
votes
1answer
93 views

How do I ADD gravitation to a rotation matrix?

I have ported the Matlab script from https://instruct1.cit.cornell.edu/courses/bionb441/LSystem/ to POV-Ray and everything works fine (although I'm not quite sure why). To navigate a "turtle" through ...
2
votes
1answer
442 views

How to translate swipe gestures into rotations?

I am making a snake game. I want to rotate my snake in the direction specified by swiping on the screen, the directions are limited to orthogonals (90 degree increments). It's an android game. Can ...
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2answers
1k views

Set new forward directions based on camera position [duplicate]

I have a 3rd person camera which can rotate around the player. When I look at the back of the player and press forward, player goes forward. Then I rotate 360 around the player and "forward ...
4
votes
1answer
110 views

What direction is forward when the rotation is (0, 0, 0)?

I'm representing the rotations of my actors (or gameobjects) with euler angles (one float for each axis). And I've always considered the vector (1,0,0) (x,y,z) to be the actor's direction if all ...
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0answers
32 views

Java Slick2D rotating a Shape using transform(Transform.createRotateTransform())

I have spent most of the day trying to debug this tiny piece of code, and I can't for the life of me figure it out. I'm making a pong game for the Mini Ludum Dare currently going on. I am programming ...
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1answer
41 views

How can I rotate a Transform over a specified time in a single line of code? [duplicate]

How can I rotate a Transform over a specified time in a single line of code? I have had a lot of trouble with this in the past. I wrote a script which rotates a Transform by a specified rotation ...
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3answers
286 views

Rotate object around fixed axis

I am trying to let the user of my app rotate a 3D object drawn in the center of the screen by dragging their finger on screen. A horizontal movement on screen means rotation around a fixed Y axis, and ...
5
votes
2answers
266 views

How does glRotate affect the axes of the global coordinate system?

I am currently playing around with 3D transformations applied on a 2D context in LWJGL, to later be implemented in my game. So I managed to set up LWJGL well enough (scaling, translating, scaling and ...
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votes
2answers
98 views

Accelerometer bike game rotation help

Hi I've been making a game for the last few months and not sure what to do. It's a 2d bike game and I want the rotation done with accelerometer, at the moment To test on computer I've set the ...
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0answers
17 views

Bike rotation freeze rotation

Hello im making a bike game and need it to stay up (doing a wheelie) without gravity knocking it down ive tryed freezing the rotations and turning off gravity and it dosent work, so not sure how to do ...
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0answers
16 views

2D smooth Rotation Unexpected

I am trying to get a smooth 2D rotation and this semi works but only in (-x, +y) I have tried using a lerp but I still get the same result. So I believe, it has something to do with the rot_z value ...
0
votes
1answer
249 views

Why are my target-following objects rotated the wrong way?

I writing a script that would make my players reach a target destination. It looks like this so far: private void MoveTowardsGoal() { if (Vector3.Distance (reachGoalTarget.transform.position, ...
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0answers
79 views

How do I implement realistic recovery from weapon recoil?

I want to create an equation determining how fast a gun recovers back to its center after it has fired. I have a weapon system functioning based on constants (recoil amount, bullet spread, etc.) ...
0
votes
1answer
37 views

Matrix Rotation Only Works On one Axis At A Time

I have this function in my vertex shader. It makes a transformation matix out of a transformation matrix, a rotation and an intensity. It works just fine when setting the rotation of one of the axis ...
0
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2answers
98 views

Vector3.Angle() Never Reaching 0

I'm having trouble understanding why with this script, Vector3.Angle() sometimes will never reach 0. This question comes from me trying to make a "turret" that rotates to face a target position. It ...
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0answers
13 views

How can I track a leader vehicle at a specific angle and distance?

I am using Matlab and have code which allows a vehicle to find its way to certain coordinates chosen by the user. I now want to add a second vehicle which stays fixed at a specific distance and angle ...
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0answers
54 views

Pre- or post-multiplication for rotation between coordinate frames

I have three 3D coordinate frames: O, A and B, as shown below. I want to know the rotation matrix RAB between A and B, that is the rotation that is required, with respect to the frame A, to move ...
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0answers
26 views

Rotating between two coordinate frames

I have two coordinate frames, A and B. I want to create the rotation matrix RAB which takes you from A to B. A is a right-handed system, and B is a left-handed system. Furthermore, after moving from a ...
0
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1answer
58 views

Rotate a plane defined by its normal and its distance

First apologies for the amount of pictures, it's a bit hard trying to explain my problem without pictures. Hope I've provided all the relevant code. If you feel you want to know about how I am doing ...