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

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Move parent according to child axis in Unity?

Can I ask my parent to move according to the child axis? This means if I turn right, then right again, the parent has to be at 180° from its original position, and not only at 90° (because "Right" ...
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1answer
307 views

Matrix represents same rotation with different euler angles

I have Transform component storing it's rotation as Quaternion. Transform has set/getEulerAngles (rotation order oy, ox, oz). I want to rotate object in any direction but while testing I get ...
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1answer
155 views

How to make camera rotation independent from frame rate?

I multiply the mouse movement by a given number to get camera rotation of a desired speed. But it only works at 60 FPS. When I don't limit the frame rate I get around 350 FPS and the camera rotation ...
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0answers
244 views

How to set object's / node's absolute rotation correctly?

Usually when I want to rotate an object/node in my Ogre scene I call the node's rotate() method. That rotates the node locally relative to it's current rotation. So for example, when I start with 0 ...
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1answer
187 views

How to map absolute Joystick position to object rotation?

In my (Ogre) 3d scene I have an object that should be rotated locally based on Joystick input. I have a Joystick with min/max values of [-32767, 32767] on both X and Y axes. When the Joystick is in ...
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1answer
132 views

Getting Rotation Values From A Rotation Matrix

I'm trying to get rotation values along the x, y and z axis from a matrix that can include rotation, translation and scale data. Currently I have this function to return the y rotational value: float ...
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1answer
493 views

Mouse Aiming Causing Rotation Jitter

When our game's ships move around, mouse aiming causes them to shake around a lot. The body being aimed is moved kinematically. I think we've narrowed it down to this block of mouse tracking code. ...
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1answer
441 views

XNA - 2D Rotation of an object to a selected direction

I'm trying to figure out the best way of rotating an object towards the directional input of the user. I'm attempting to mimic making turns on ice skates. For instance, if the player is moving right ...
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1answer
721 views

iOS OpenGL ES 2.0 How to Billboard on Sphere and Rotate with Sphere

I have a sphere (earth) in OpenGL ES 2.0 for iOS. I also have markers that I want to place at lat/lons on the earth - but I want the markers to always face the user ( billboards ) but also move with ...
4
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3answers
497 views

How do I make an arrow line up with a bow when rotating them?

I am trying to create a bow and arrow animation in which the player can drag downwards to increase the bow strength (see the image) and release it to hit a target. I can't get the arrow to align ...
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2answers
443 views

Sprite not rotating around its centre after Scaling at its centre

If I scale a sprite at its centre, then try to rotate it around its centre as well, the rotation does not occur around its centre. If you need to rotate, for example a scaled ball,the way its working ...
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1answer
134 views

Rotation independent rotation

I came up with some cube rotating, but I could not make it smooth and easy to use because as the cube turned - the keys that handle the turning changed their purpose. Link to demo. The demo rotation ...
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1answer
657 views

Weapon as camera's child, rotation messed up

I put my weapon as a camera child, it works, but when i rotate my player it seems the weapon rotate a little too. I'll attach some images so you can see it. As you can see, when i look up i ...
4
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1answer
3k views

Libgdx sprite rotation (image quality)

This one is probably really simple but I didn't find a solution. I'm trying to create a widget (speedometer) with libgdx. For the arrows I'm using the setRotation() function. But when the image is ...
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2answers
1k views

How to I rotate a triangle by dragging the mouse in libGDX?

More specifically, I have rotation working in a way I don't like as follows: //Draw the triangle using this draw method //batch.draw(texture, x, y, ...
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2answers
186 views

How to rotate one object around another moving object in 3-d?

i was wondering if anyone could give me some advice on how to rotate one object around another moving object. After a bit of googling i found some code on another website that worked perfectly but it ...
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1answer
432 views

Love2D : Problem rotating image in a SpriteBatch

I'm working on a falling blocks type of game with triangular pieces. I'm using a SpriteBatch to accumulate and remember the pieces and their locations. The problem is that when I rotate a scaled ...
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2answers
3k views

How to avoid gimbal lock

I am trying to write code with rotates an object. I implemented it as: Rotation about X-axis is given by the amount of change in y coordinates of a mouse and Rotation about Y-axis is given by the ...
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3answers
528 views

First Person Shooter vertical mouse aim

I've just started writing a 3D First Person Shooter in Java, and I'm having a bit of trouble with tracking the mouse movements and moving the camera accordingly. I'm implementing typical FPS movement, ...
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3answers
3k views

Getting correct angles between Vector3s

I'm working on a project where you can draw lines between points. You select one point and drag the mouse onto another point and a line is drawn between them. The line itself is a 3d object which is ...
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1answer
630 views

Rotating plane to be parallel to given normal via change of basis

I have two planes and their respective normals. I would like to rotate the second plane, planeB, so that it is parallel to the first, planeA. To do this, I am using a change of basis to rotate each ...
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1answer
3k views

Moving A Sprite In The Direction Its Facing XNA [duplicate]

There are many questions on this site that explain this except they seem to all be in Java. I want to move a sprite in the direction it's facing, in XNA. I know you must use Radians and lots of ...
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1answer
201 views

Scaling and rotating texture onto another texture by raw buffer data

I've been messing with C++ AMP and OGRE in attempt to make writing to/altering textures to my liking easier on my behalf. In this I've been trying to draw a texture onto my "dynamic" texture with ...
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1answer
297 views

Moving an object toward another object on sphere knowing their quaternions

I have a sphere centered in world origin. On the sphere surface I have two objects and I know their quaternions (rotation around sphere). Currently my movement works on Vector2 inputs (cannot change ...
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1answer
802 views

Rotation of Rectangle along Y-axis transformed to parallelogram

After the rotation of a rectangular view along the Y-axis, about its center, transformed into parallelogram, how do I get the rotated parallelogram coordinates? By Y-axis, I mean perpendicular to the ...
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1answer
821 views

How rotate a 3D cube at its center XNA?

I try to rotate a 3D cube on itself from its center, not the edge. Here is my code used. public rotatemyCube() { ... Matrix newTransform = Matrix.CreateScale(scale) * ...
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5answers
2k views

how to rotate enemy to face player? [duplicate]

Okay so i havebeen rotating my enemy to face the player using float targetrotation = Math.Atan2(playerpos-enemypos); enemy.rotation = targetrotation; (<this line of code i want to change) This ...
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2answers
2k views

Render rotated rectangle inside other rectangle bounds using Libgdx

I have this code to generate a red rectangle inside a grey rectangle: new Rectangle(grey_rectangle_position_x, Game.SCREEN_HEIGHT/2-Rectangle.height/2,0); This code makes the following: Now, I ...
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2answers
562 views

How do I apply 2 rotations about different points to a single primitive using OpenGL

I'm working on a 2D top-down shooter game that has a rotation feature like Realm Of The Mad God such that if you press e the camera rotates around the character in a clockwise direction and q rotates ...
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1answer
130 views

XNA Help - Slerping the KoolAid

I'm having some SLERP issues and was hoping one of you guys' could help me with your expertise... (The following code is the Update method of a component whose responsibility is to rotates it's actor ...
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3answers
3k views

XNA SpriteBatch.Draw with rotation, scaling and origin?

I use a 1x1 pixel 2d texture as source for SpriteBatch.Draw. The texture is scaled and rotated around an origin. The left image is only scaling. The right one scaling + rotation around the origin at ...
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1answer
253 views

Smooth rotation [duplicate]

I would like to rotate my Player very smooth. At the moment the player stops rotating when I release the button. Also the rotation should get faster, if the player rotates longer. I use XNA and have ...
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2answers
172 views

Rotating and pitching a turret

I am new to game development and I was trying to build a turret model, and control it through lua script in shiva3d. I can rotate it around the y axis which is no problem, but when it comes to ...
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1answer
529 views

Pygame's rotation methods have crippling issues, but is it me or Python's pygame?

http://www.youtube.com/watch?v=lNJFxvR6ex8&feature=youtu.be On rotate and rotozoom, can't find fixes on these on the internet, anywhere. Basically, the video is showing 4 things in this order: 1. ...
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1answer
1k views

Rotating 3d plane to XY plane

I have a triangle in 3d space and would like to create a grid over the triangle, such as in the image below. The purpose of this is to store information about each block of the grid. In order to ...
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1answer
2k views

Rotating Objects in OpenGL: glRotate or Quaternions?

I'm coding my first engine and I'm trying to have performance in mind since I'll probably use it for mobiles, and I have this question, should you use glRotate or Quaternions for rotating objects in ...
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0answers
142 views

Pitch (X-axis) rotation problem [closed]

Situation: From a first person perspective (camera position) I want to be able to grab an object and have it fixed to the center center of the screen while looking up-down (pitch) and looking ...
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1answer
133 views

Making A Sprite Rotate To A Specific Angle XNA 4.0

I have a game that the character spins when you press either of the triggers on the xbox remote. Here's the code. if (gamepadState.IsButtonDown(Buttons.RightTrigger)) RotationAngle += ...
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1answer
549 views

rotate sphere horizontally around another sphere

I currently have an earth and a moon. What I'm trying to achieve is to have the moon physically rotate around the earth horizontally along the equator along a circular path. moonAngle = ...
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1answer
171 views

Difference between rotation methods?

My question is in about rotate methods in android.graphics.Camera. In Docs, I saw these comments: public void rotateX (float deg) Since: API Level 1 Applies a rotation transform around the X ...
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2answers
439 views

Rotating a 2D Skeleton

I am currently implementing a 2D skeleton system in C# with XNA, but got stuck in how I would rotate the bones around a skeleton's axis. A basic algorithm that I have figured out already would ...
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votes
1answer
822 views

Orbiting multiple objects evenly around a changing radius

I have multiple objects (circles) and I want to place them in a circle, with even distance between each one, and have them orbit the center of the screen. If I remove one object, I want the orbit ...
3
votes
1answer
1k views

360+ degree rotation skips back to 0 degrees when using Math.Atan2(y, x)

I'm new to XNA and this is my first actual project, so forgive my noobness. I'm using jointAngle = System.Math.Atan2(RightStick.Y, RightStick.X); in order to set an angle of a joint (farseer) so ...
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1answer
3k views

Rotate an object around a point in Ogre3D [duplicate]

Possible Duplicate: How can I rotate about an arbitrary point in 3D (instead of the origin)? I am new to 3D programming and I have been using Ogre3D lately to get a grasp of it. What I am ...
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2answers
832 views

Matrix Rotation with three Angles

I want to rotate a form with three given angles fo each of the three axis. But the GLM rotation function takes only one angle and a vector as arguments. How can I convert between both formats?
5
votes
1answer
662 views

Calculate gears rotation for a realtime simulation

Hi I'm trying to do a game with real time simulations of gears. There is a big Gear with inside a smaller gear. I managed to draw gears with different diameters but equal size teeth, but if i try to ...
4
votes
2answers
2k views

How is the gimbal locked problem solved using accumulative matrix transformations

I am reading the online "Learning Modern 3D Graphics Programming" book by Jason L. McKesson As of now, I am up to the gimbal lock problem and how to solve it using quaternions. However right here, ...
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1answer
226 views

how to move the camera behind a model with the same angle? in XNA

I'm having difficulty moving my camera behind an object in a 3D world. I'd like to have two view modes: for fps (first person). external view behind the character (third person). I've searched the ...
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3answers
762 views

How to rotate to a target position over time

I know how to do rotations to vectors, but how do I rotate over time? For instance say I made a function RotateTo(vec2 iPosition, float iTime); so it rotates to iPosition over iTime - how would ...
3
votes
3answers
5k views

Pygame surface rotation, rect rotation or sprite rotation?

i seem to have a conceptual misunderstanding of the surface and rect object in pygame. I currently observe these objects this way: Surface Just the loaded image rect the 'hard' representation ...