The circular movement of an object around a specific axis.
0
votes
2answers
61 views
Is this Rotation Matrix correct?
I'm having heavly troubles with setting up a View Matrix and a Projection Matrix. It simply doesnt work. So I think my problem is related to my rotationMatrix function. I'm using this tutorial to ...
0
votes
3answers
62 views
Rotating each quad in a batch separately?
Background
In my app I use the following code to rotate my quad:
Code
//Rotate the quad
Matrix.setIdentityM(mRotationMatrix, 0);
Matrix.translateM(mRotationMatrix, 0, centreX, centreY, 0f);
...
0
votes
1answer
42 views
Type of 3D Rotation Animation used in this video [closed]
http://youtu.be/IUZqinlhono
I have referred to an application for interactive rotation in 3D space. The same is uploaded on youtube for your reference.
I am having difficulty in understanding the ...
0
votes
1answer
41 views
Normals not rotated correctly
While rendering a cube to the gbuffer (diffuse, normal, depth) I noticed something odd when applying rotations. I build a world matrix for the cube as follows:
Yaw = Yaw % MathUtil.PI2;
Pitch = Pitch ...
1
vote
4answers
129 views
How to smoothly rotate a vector in a direction?
I'm looking for an easy way to achieve the following:
Object A, B
{
Vector2D position;
Vector2D orientation;
}
update(elapsed)
{
//rotate A's orientation in B's direction by x * elapsed ...
1
vote
0answers
43 views
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" ...
3
votes
1answer
110 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 ...
1
vote
1answer
49 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 ...
1
vote
0answers
48 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 ...
3
votes
1answer
54 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 ...
0
votes
1answer
78 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 ...
0
votes
1answer
86 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.
...
0
votes
1answer
61 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 ...
0
votes
1answer
113 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 ...
0
votes
0answers
105 views
creating arcball in cocos 3d [closed]
I am trying to make arc ball sample in cocos 3d , the code seems to be ok, but the rotation of ball is not as expected
it seems that i've done something stupid, but i can't figure it out. please check ...
4
votes
3answers
173 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 ...
1
vote
2answers
87 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 ...
2
votes
1answer
89 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 ...
1
vote
1answer
86 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 ...
2
votes
0answers
100 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 ...
0
votes
0answers
51 views
Understanding quaternions and axis angle representations [closed]
I have a sensor that gives me a quaternion. I convert the quaternion to an axis-angle representation using http://www.euclideanspace.com/maths/geometry/rotations/conversions/quaternionToAngle/. When I ...
0
votes
2answers
164 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, ...
0
votes
2answers
94 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 ...
0
votes
1answer
94 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 ...
2
votes
2answers
216 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 ...
1
vote
3answers
169 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, ...
3
votes
3answers
230 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 ...
5
votes
1answer
109 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 ...
-2
votes
1answer
189 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 ...
3
votes
1answer
100 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 ...
1
vote
1answer
87 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 ...
0
votes
0answers
52 views
Proper matrix rotation and storing rotation values
I have GameObject's transform component(position+rotation) and shape mesh(array of vertices).
On each game tick I update coordinates of vertices relatively to game object's rotation.
And my current ...
0
votes
1answer
132 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 ...
3
votes
1answer
185 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) * ...
1
vote
5answers
360 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 ...
1
vote
2answers
254 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 ...
0
votes
0answers
38 views
save bones position after rotation un xna
i'm developping a game for solving a rubik's cube in xna framework c#
i want to know how to save bones positions after rotating them
i'm calling this method to draw bone witch construct the
...
0
votes
1answer
137 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 ...
1
vote
1answer
102 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 ...
0
votes
3answers
234 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 ...
0
votes
1answer
134 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 ...
0
votes
0answers
116 views
Fling and Spin an Object with Touch
For making a bottle to spin, I focused first on the touch dragging via input processor interface. It's a bit unresponsive since when I rotate clockwise or counter-clockwise as long as my finger ...
1
vote
2answers
100 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 ...
1
vote
2answers
121 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. ...
3
votes
1answer
223 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 ...
0
votes
1answer
610 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 ...
2
votes
0answers
74 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 ...
0
votes
1answer
86 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 += ...
0
votes
1answer
153 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 = ...
2
votes
1answer
119 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 ...
