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

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36 views

How to find or compute or look for overall/max RPM by simply checking for rotation?

I find it hard to determine the wheel RPM since I'm only making a simple 2D game of rotating object via Z-axis. I wanna try this solution but I got no change since I'm trying to find the RPM from a ...
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1answer
38 views

Problem finding correct value for Yaw

I use an Arduino and a 9dof sensor ( gyroscope, accelerometer and magnetometer ) and i'm trying to use the pitch, roll and yaw that the sensor gives me to rotate an object in unity. I managed to ...
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1answer
46 views

Should I store local forward/right/up vector or calculate when necessary?

I'm working on an object picking and translation/rotation/scale gizmos system in my engine where you select objects and perform transformations on them in a 3d editor-like fashion (e.g. Blender) In ...
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1answer
125 views

How to rotate a triangle towards the point in Qt?

I have an issue with items rotating. I have a point and a triangle which needs to be rotated with its apex point towards the taregt point. The right side of the picture represents how it is should to ...
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1answer
101 views

How to pitch, yaw, roll, an object like a flight simulator in OpenGL?

I'm working on a college Graphics project using LWJGL (OpenGL in Java). I've done most of the scene but I got a problem in figuring out the jet's orientation. Here's how I tried it at the very ...
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1answer
68 views

Help With Rotating Turret and Muzzle Flare Sprites

I am making a top down game that involved tanks rotating their turrets and firing at other tanks. I have the turrets rotating independently of the tank itself about the center. However, I am now ...
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1answer
151 views

Rotate billboard towards camera

I'm trying to create a particle system in OpenGL, and as such I need to use billboards. I need these billboards to face the camera at all times. The tutorials I've been following only rotated the ...
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1answer
77 views

Rotations of a Rubik's cube

I made a Rubik's cube by arranging smaller cubes. Now I want to apply animations to it. For that I am choosing to use the Rotate class and set the angle of rotation and the axis of rotation,like this ...
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1answer
50 views

Rotation of a cube

I came across the statement "rotation about a pivot and an axis" in javafx. The axis is defined byPoint3D and the pivotX, pivotY and pivotZ are of double type. I could not form a relation about what ...
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1answer
95 views

Calculating rotation matrix for an object relative to a planets surface in MonoGame

I have a 3D planet and I would like to place models on the planet and have them start with a base rotation relative to the planet surface at their location. So a model at the north pole will have zero ...
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1answer
79 views

How to calculate a vector for multi-axis rotations from sphere coordinates?

I'm working on a SceneKit project in iOS, trying to rotate a sphere (representing a planet) so that a point at a given longitude/latitude coordinate is facing "forward" (i.e. that point moves to the ...
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57 views

Tweening back from arbitrary 3D rotation in javascript

I'm using a 3D javascript library to rotate the vertex of a 3D object with a classic 3x3 matrix, to an arbitrary angle in the 3D space, as depicted in the image below. For example, a first ...
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1answer
120 views

Quaternion rotation problems [duplicate]

I want to rotate my model and I have X and Y rotations. Here is my code: D3DXQUATERNION q, qrotation; D3DXQuaternionRotationAxis(&q, &D3DXVECTOR3(1.0f, 0.0f, 0.0f), ...
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1answer
65 views

Rotate sprite direction Cocos2d

I want that my sprite go always forward, and you can only control his direction moving right and left (on 360 degrees). I don't know why, but the movement it's senseless. The constants to move and ...
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1answer
70 views

Rotation Continuity help

First the issue im having: Basically its the fact that the angles of a circle aren't continuous, they rise from 0 to 2pi then immediately fall back to 0. I want to make a game where the player ...
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1answer
163 views

Earth and sun - How to make the sun revolve around the earth in the following code?

I want to imitate the planetary system with Earth and Sun drawn as solid spheres on the same window. I have drawn the two: the earth as the bigger sphere and the sun as the smaller sphere. Now I want ...
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1answer
56 views

Strange Rotation in LWJGL

What I am trying to do is to create a Rubik's Cube game using LWJGL in Java. I have a lot of it done already, the only problem is the rotating. It just isn't working. I've tried multiple ways of ...
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3answers
55 views

Storing component vectors to avoid matrix and quaternion inaccuracies?

I read that I "should really be storing the component vectors (rotation, translation, scale) in addition to the quaternion and matrix forms." The reason for this is that, over time, compound numerical ...
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2answers
121 views

How to handle angles in an isometric game?

I am working on my first isometric game, and I am not sure how to go about angles and rotation. Basically, I want the player's forward movement and rotation to coincide with the isometric angles. I ...
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0answers
131 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 ...
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2answers
53 views

Strange behavior with transformation matrix

I'm fairly new to transformation matrices. I'm using them to translate and rotate nodes and their child nodes. The following code works when applied once, but shows strange behavior when applied many ...
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2answers
108 views

Rotate sprite along the angle between two objects

Im trying to make flames follow my object, I set the direction for my moving object using the points between it and another object (using static destination for testing). No matter what I do I ...
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66 views

Should I use animation or simple object rotation in this case

I'm making game where players control hover tanks using Unreal Engine 4. Tank have a turret which rotates around for aiming. Turret pivot/center of mass is not exactly in joint with rest of tank so it ...
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1answer
65 views

How do I create a rocket projectile that is “dropped”, then accelerates toward the enemy?

I'm making an Asteroids-like game. I've successfully implemented linear bullets. Now I want to add some rocket-styled bullets, with a certain flight path: The rockets should be "dropped" back first, ...
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1answer
84 views

Unity Animated Player Character Rotation Glitch

I was wondering if anyone experienced this issue in Unity with Mecanim-animated characters ... I have an animated player character with a third-person camera control (Game Camera from the asset ...
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1answer
106 views

Transform.forward having problems after rotation

I have this script, void Update () { float pitch, yaw, roll; pitch = Input.GetAxis ("Mouse Y"); yaw = Input.GetAxis ("Mouse X"); roll=Input.GetAxis ("Roll"); ...
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1answer
186 views

Help me understand this vbo/rotation, and how its done opengl c++

Im pretty new to opengl, and I just cant figure out how to rotate this vbo/vao in 2d space. This is how I bind my coordinates: float points[] = { 0.0f, 0.10f, 0.0f, -0.10f, -0.10f, 0.0f, ...
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1answer
614 views

Tetris: 2D Rotation Matrix?

I'm creating a Tetris clone right now. I've got the tiles of tetromino stored as an std::array<tile, 4>. Each tile holds its (x,y) coordinates relative to the piece. For example, the t-block ...
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1answer
77 views

Euler adjustments between two quaternions

I have two quaternions, q1 and q2. If my object's current rotation is at q1, but I need to get it to q2, what would be the process to figure out how much rotation I apply to x, y, and z in order to ...
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17 views

Child object looktowards waypoint

hi guys how can I let my child character looktowards upcoming waypoint which can be on curve,slopes,hill.I have tried sevaral scripts but they are not giving proper rotation across all direction.Most ...
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0answers
66 views

Rotating kinematic object around a moving point Box2D

I'm new at Box2D and I am making a simple game where you control the rotation of the maze and the gravity leads the ball to the exit. The game looks like: The problem: I want to rotate the maze, ...
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1answer
129 views

How can I adjust steer angle based on speed in Unity?

I'm following this (https://www.youtube.com/watch?v=kAEpLX3rfms) video on how to make a car in Unity. But my car doesn't lower the steering angle based on the speed of the video. The idea was that you ...
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166 views

smoothly recenter view over time

I'm currently using the Google Cardboard SDK for Unity to build a fighter pilot simulator. What I'm currently trying to do is recenter the view(CardboardHead) smoothly over time when the user looks ...
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3answers
50 views

Libgdx RotateToAction does not directly rotate between 179 and -179

It took me a bit of debugging to realize why I'm having trouble with my rotations and it seems that rather than just moving the 2 degrees between 179 and -179, it prefers to rotate all the way in the ...
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1answer
49 views

In unity, how do I rotate a vector in relation to the player?

I am making a radar script in a unity FPS game project I am making for class. I already have a working example of a radar script that works in relation to the player's position. However the rotation ...
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1answer
216 views

Unity3d - Transform rotation(angle) help

Im trying to rotate an object 90 degrees to the left but instead of rotating straight left it rotates 270 degrees to the right. Here's the part of the code which controls the rotation: ...
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1answer
58 views

Camera rotation according to target direction

I am facing issue when camera is following to my target and target rotates to 90 degree or -90 degree than camera is not rotating.i want smooth rotation according to target when target is change the ...
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1answer
113 views

Given a 3d goal point and a turn rate in radius, find max speed to reach goal

I'm working on a 3d space sim with AI agents flying ships through space. I am trying to get them to follow a waypoint path nicely, which involves figuring out how fast they can be travelling and still ...
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1answer
41 views

Rotation of rectangles offsets render position

I have an unknown number "Bricks" that must follow a straight, but not always level, path. Each brick is rotated around one central point properly to form a shape of intersecting paths. My problem ...
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36 views

Can I “Pre-rotate” VBOs while loading them in LWJGL?

It is possible to flip VBOs horizontally and vertically by swapping around destination coordinates. Is it possible to rotate an image by any angle, such as 45 degrees, using different destination ...
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1answer
208 views

Rotate arrow without using Unity3d physics engine

I have this code that simulates the movement of a projectile without using the unity physics engine IEnumerator LaunchProjectile(int angle, float speed) { // Move projectile to the position of ...
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43 views

Rotate Object inside room according to wall

I have a room. I am trying to move an object whenever it collides with a wall. It's working properly except at the edge of two meeting walls. At the edge it's flicking. I tried to move the object when ...
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1answer
22 views

Finding specific coordinates on a rotating line

I'm currently working on a mobile game which mainly consists of a rotating line and a ball. The line rotates 0.500 degrees clockwise around its center every frame. The ball is at first positioned in ...
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1answer
451 views

In UE4, how do I turn my character's body together with the camera?

I made a simple punch animation in Blender and exported it into Unreal Engine 4. In-game, the character appeared from a 3rd-person perspective, but I made it look like first-person by adjusting the ...
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1answer
159 views

Quaternion.LookRotation() not rotating 360 degrees

In my scene I have two cubes one has a tag "Respawn" and another one has the following script attached: ` using UnityEngine; using System.Collections; public class NewBehaviourScript : ...
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2answers
445 views

calculating torque from angular momentum considering inertia moment

so I am trying to determine exactly how much torque to apply to a 3d model to make it rotate at a particular rate. I apply force from the location of each engine on the craft so if one breaks the ...
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3answers
73 views

How much to roll Z to make horizon level

I've got a flying camera with some arbitrary rotation. (It also has a translation, but that's not important.) It's flying along its local Z axis, traveling in some direction over the ground with ...
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99 views

3D 3-axes rotation into 3D 2-axes rotation

Hello everyone and thanks in advance to anyone who'll help me through this ! I am currently working on the Kinect V2 (for XBox One) to interact with an avatar. I'd like to use the rotation quaternion ...
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1answer
189 views

Rotating A 2D Cannon Based On Mouse Position [duplicate]

I'm creating a game like bubble shooter, I have a cannon which is in the image bellow: I want to rotate the cannon based on mouse position. So far I tried various solutions I found over the web but ...
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0answers
94 views

Faking Perspective/Depth using 3D images converted to 2D sprites - Can't work it out!

after a lot of searching/reading/viewing old school game videos I am still unable to work out how to achieve the effect I am after. I am currently working on a 2D "overhead view" sci-fi RPG, using a ...