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

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How can I modify the UV co-ordinates on a texture so they converge to a point?

I'm building a roof visualiser app, where someone can take a picture of their roof, define its outline, then visualise a new roof texture on it. I'm generating a 3D plane that matches the roof ...
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35 views

Libgdx polygon ratating

I'm using polygons for collision detection. Here is the code: poly = new Polygon(verticies); poly.setOrigin(100,100); poly.setRotation(45); renderer.setColor(Color.GREEN); ...
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2answers
81 views

XNA Rotating a Rectangle?

I am in the process of making a giant shooter game and I have got to the point where I needed to use rectangles to detect bullets and giants hitting the player. I did that however, if you look at this ...
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0answers
9 views

CanDraw in large hierarchical scene with rotation

I've been assigned to write small simulation visualization, that contains thousands of cubes (I know you heard that before). Now I'm working on optimization of stuff that takes place there, but ...
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1answer
44 views

Separate rotation transform from parent

I have a hierarchy like this Body - Head - Arms Currently this works fine in that the Body's transformation is reacting as it should. Being children, the Head and Arms match the Body's ...
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1answer
75 views

Free camera rotation in 3D space

I'm using a view matrix to do camera movement and rotation. viewMatrix = new Matrix4f(); viewMatrix.setIdentity(); Matrix4f.rotate((float) Math.toRadians(rx), new Vector3f(1,0,0), viewMatrix, ...
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2answers
209 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 ...
6
votes
1answer
89 views

How can I keep the clicked point under the mouse when rotating? (GLM)

I have a spherical mesh of radius 1, centered at (0,0,0) in world coordinates. I want to rotate the sphere so that the clicked point remains under the mouse at all times. However, I cannot find an ...
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43 views

I have a script that changes an object to a broken version of itself when clicked, but it keeps rotating the object

So I have made a script in unity that you put on an object and when you click the object it will delete the object and replace it with a broken one I made in blender. My problem is that when I click ...
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3answers
161 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
83 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
108 views

How to rotate an object along its trajectory path?

I have a missile launcher that uses initial velocity for the trajectory. I edit the launch angle from the editor, and then the script calculates the initial velocity required to land the missile to ...
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2answers
529 views

Rotate an object smoothly by 90 degrees on key press in unity3D

[I saw few similar question on stackexchange but none is solving the purpose.] I want to rotate a 3D object by 90 degrees on different axis on respective inputs. For example if 'a' is pressed, the ...
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1answer
50 views

Rotation with respect to world instead of the object itself using Quaternion.Euler in unity

[Other answers on similar questions on stackexchange didnt help] This script is giving some weird outputs On running this script If I press rightarrow once followed by 's' the object rotates on 'z' ...
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1answer
49 views

glRotatef not rotating simple 2D triangle

I am new to OpenGL and am learning it for the purpose of some simulation that I am doing as part of my research work. I have been following the tutorials given at ...
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2answers
151 views

How can I make an object move in four directions relative to its rotation?

I want to make a game object move in directions relative to the direction is facing. That is, If the user presses the "W" key the object goes "forward" if its presses "D" the object goes to its left. ...
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2answers
83 views

Angluar movement

I'm making a little game where you are a spaceship and you fly around in 2d using the A and D key to rotate and the W key to accelerate. Now my problem is if i turn my ship it doesn't go into the ...
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2answers
1k views

XNA - positioning after rotation

I have a turret with a 2 gunbarrels. The turret rotates towards my mouse. So far no problem. When it creates a few bullets and positions them at the end of the gun barrels. Here is the problem. It ...
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1answer
82 views

3d rotation of a Gunner unit to shoot the target

I'm developing a scenario to shoot incoming targets by a specific gunner unit, however I'm confused to actual logic of shooting an object with a gun. I'm working in 3D environment. I'v target's ...
26
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2answers
2k views

Calculating the rotational force of a 2D sprite

I am wondering if someone has an elegant way of calculating the following scenario. I have an object of (n) number of squares, random shapes, but we will pretend they are all rectangles. We are ...
2
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1answer
74 views

In XNA, how do I access a model's dimensions with code?

I'm trying to rotate a model around some axes, but this rotates it around the world origin. I understand that I need to translate the object relative to its own size before rotating it, but I don't ...
5
votes
1answer
151 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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2answers
114 views

How do I calculate rotational impulses in rigid body collisions?

I'm writing a simple 2D physics engine to help me understand the inner workings of physics engines. I'm following Randy Gaul's tutorial which can be found here and It's been extremely useful and ...
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1answer
154 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
76 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 ...
0
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1answer
97 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 ...
5
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1answer
5k 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 ...
0
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1answer
148 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
91 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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0answers
32 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 ...
2
votes
2answers
171 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, ...
0
votes
1answer
84 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 ...
0
votes
1answer
138 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 ...
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vote
1answer
87 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 ...
1
vote
1answer
64 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 ...
2
votes
2answers
117 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
votes
1answer
179 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 ...
0
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2answers
138 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 ...
2
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1answer
157 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
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2answers
2k 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 ...
0
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0answers
89 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 ...
0
votes
1answer
61 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 ...
12
votes
3answers
734 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
311 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
198 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 ...
0
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0answers
31 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
18 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
282 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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vote
0answers
119 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
41 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 ...