Questions tagged [camera]

Game worlds are viewed from a camera, which is the viewpoint from which the game world is observed from.

3
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2answers
3k views

Why is the camera tilting around the z axis when I only specified x and y?

My goal is to program a camera to point towards the mouse cursor. I attached the following script to the Main Camera. ...
21
votes
4answers
12k views

Cast ray to select block in voxel game

I am developing a game with a Minecraft-like terrain made out of blocks. Since basic rendering and chunk loading is done now, I want to implement block selecting. Therefore I need to find out what ...
8
votes
2answers
11k 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 ...
17
votes
4answers
43k views

How can I orbit a camera about it's target point?

I'm drawing a scene where the camera freely moves about the universe. The camera class keeps track of the view (or look at) point, the position of the camera, and the up vector. These vectors/points ...
20
votes
2answers
15k views

Implementing a camera / viewport to a 2D game

What is the most practical way to implement camera/viewport to a 2D-game? I've read, that I should store the object world position instead of position relative to the screen? Current situation: I ...
18
votes
2answers
22k views

How can I convert a mouse click to a ray?

I have a perspective projection. When the user clicks on the screen, I want to compute the ray between the near and far planes that projects from the mouse point, so I can do some ray intersection ...
8
votes
2answers
3k views

How do I keep my character centred on screen?

I am making a game similar to Legend of Zelda: Link to the Past (top-down 2D action-adventure). I want the character to stay centred on the screen when he moves. Currently, whenever the player wants ...
87
votes
9answers
50k views

Why do we move the world instead of the camera?

I heard that in an OpenGL game what we do to let the player move is not to move the camera but to move the whole world around. For example here is an extract of this tutorial: OpenGL View matrix ...
36
votes
5answers
18k views

Realistic Camera/Screen Shake from Explosion

I'd like to shake the camera around a bit during an explosion, and I've tried a few different functions for rocking it around, and nothing seems to really give that 'wow, what a bang!' type feeling ...
17
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2answers
17k views

XNA 2d Camera Scrolling - why use matrix transform?

I am making a test game where I want the level to be constantly scrolling. To create this effect I have established a camera class which simply stores a vector2 position and an enum direction. It also ...
38
votes
1answer
6k views

Mouse aim in an FPS

I would like to make a First Person Shooter and move the camera with the mouse. The problem is that when the cursor reaches the limits of the screen, the camera won't turn anymore. How can I keep the ...
17
votes
4answers
7k views

How to keep my Quaternion-using FPS camera from tilting and messing up?

I am using an FPS-like camera, and it uses quaternions. But, whenever I try looking up and then sideways, it tilts, and sometimes it can turn upside down. How can I fix this?
5
votes
1answer
4k views

Mouse location is off due to camera

I'm building a top down shooter but I have a little issue with my camera and mouse. When I add the camera that I use to my game (see here) my mouse pointer seems to be in the wrong location. When I ...
3
votes
1answer
8k views

3D Ray Casting / Picking

I am not sure if I should post this link, but I feel this falls into game development just as much as it does math. I have a ray cast's far and near values and I am trying to calculate the end point ...
4
votes
1answer
6k views

Orbiting a specific point - Orbiting Camera

How would I create a camera that with the mouse, it allows you to orbit around a specifc position, with the camera always facing that point? I would also like it to be able to always be at a constant ...
2
votes
1answer
913 views

How do I ensure that my 2D side-scroller camera stays within the world bounds?

I have tried implementing a basic 2D sidescroller camera in XNA, but I don't want it to be able to scroll past the edges of my tile map! I tried to fix it, but when I get the left side working, the ...
1
vote
1answer
752 views

How do I fix my planet-facing camera?

Summary I'm having trouble implementing a camera controller suitable for first person use around a planet. The camera needs to be oriented correctly according to gravity (vector from camera ...
24
votes
2answers
3k views

Mega Man-style screen scrolling design

The NES classic Mega Man series uses a very specific scrolling technique that I'm having a hard time wrapping my head around implementing. Essentially, the level is divided into "screens" which are ...
8
votes
3answers
6k views

Why does Unity in 2d mode employ scaling and the default othographic size the way it does?

I previously used SFML, XNA, Monogame, etc. to create 2d games, where if I display a 100px sprite on the screen, it will take up 100px. If I use 128px tiles to create a background, the first tile will ...
4
votes
1answer
441 views

Unwanted highlight on far side of objects near the edges of the screen when using orthographic camera

I was creating a simple unity game with a sphere as a ball. The problem is that the ball face towards the camera origin renders material correctly but the one away from camera does not. The ball has ...
15
votes
6answers
3k views

Creating my own kill cam

I plan on creating my own kill cam system for a sandbox tool set. After thinking about the mechanics of the kill cam itself, however, I'm quite lost. I'm trying to recreate the ones commonly seen in ...
6
votes
1answer
12k views

How to implement a basic arcball camera in OpenGL with GLM

I only just started learning OpenGL and even things like vector maths etc a couple of days ago, so I am having a bit of trouble figuring out exactly what to do to ...
1
vote
1answer
2k views

Unwanted roll when rotating camera with pitch and yaw

I have a quaternion class implementation, and when I apply this class to my objects all gone right (rotations), but I have a lot of troubles with the camera. I've been searching a lot trying to solved ...
9
votes
1answer
4k views

How can I record from a second in-game camera and later export it to a video file?

I'm making a PC Horror game in Unity, and I want to have a camera recording simulation in-game - so you can leave a creepy location anytime, and you will have a tape with what you recorded on camera ...
5
votes
1answer
665 views

Unity3D Camera constantly moving

I'm trying to make my own first person camera controls in unity that use both thumbsticks on a joypad. I have this working fine. However, when I move the right thumb stick (the one uses to look left / ...
2
votes
1answer
2k views

2d game view camera zoom, rotation & offset using 'Filter' / 'Shader' processing?

I wish to add the ability to zoom-in, zoom-out, rotate and move the view in a top-down view over a collection of points and lines in a large 2d map. I split the map into a grid so I only need to ...
2
votes
1answer
1k views

2d Tile Movement and Camera

Let's imagine we have a 60x60 grid (where a Tile is 64x64px). Within the viewport there should be 10 tiles. The player object is 32x32px. To have smooth movement, I have to take delta time in ...
1
vote
1answer
3k views

Unity - blur on one camera effects the other as well

I'm trying to fake a DOF effect for Sprites by using 2 cameras, one for the sharp objects, one for the blurred ones. I have set up the layers like Blur and Sharp accordingly. So I have these 2 ...
4
votes
1answer
2k views

Obtaining a world point from a screen point with an orthographic projection

I assumed this was a straightforward problem but it has been plaguing me for days. I am creating a 2D game with an orthographic camera. I am using a 3D camera rather than just hacking it because I ...
4
votes
1answer
2k views

Orthographic Camera Zooming

In XNA I am using a spritebatch to render a board. I have created a camera class which can provide me a view and projection matrix. Currently I am supplying the view matrix to my sprite batch when I ...
3
votes
1answer
3k views

Calculating camera frustum planes using existing matrix

I'm trying to get basic frustum culling against an AABB working, and I'm having a bit of trouble figuring out how to extract the frustum planes from my camera's transform matrix. All the example code ...
2
votes
4answers
3k views

Smooth Camera Follow

I am using a fixed static background. I have a gameobject(Current ref. image) which is moving with the help of waypoints. I have made camera to follow the Current. The camera is stuttering while ...
0
votes
2answers
365 views

Keep Mini map static after rotating / zooming with camera

Hi I am making a 2D game, where the Camera is able to rotate / zoom in or out on the camera focus (the player usually). However my game also contains a mini-map, and so far whenever I have to rotate ...
0
votes
1answer
7k views

How can I make my player move in the direction the camera faces?

I have a 3rd person camera which can rotate around the player. My problem is that wherever camera is facing, players forward is always the same direction. For example when camera is facing the right ...
0
votes
1answer
2k views

How do I disable fog on specific camera/s

I'm building an FPS with fog and I want to include a dynamic minimap, showing the locations of player and enemies in real time. This is utilized by a second camera which is orthographic and looks at ...
0
votes
2answers
2k views

Making a Camera look at a target Vector

I have a camera that works as long as its stationary. Now I'm trying to create a child class of that camera class that will look at its target. The new addition to the class is a method called ...
6
votes
4answers
24k views

How to add a scrolling camera to a 2D Java game?

I am attempting to create a game where the camera follows the player, always making sure the player is in the center of the screen. How would I go about this? This game is a 2D Java game, made with no ...
9
votes
1answer
13k views

3D Camera Rotation

Please, forgive me, but I need help and I've been stuck on this for a few weeks now, I'm making no progress and everywhere I go and I see a different answer, everything I try doesn't work. I've had ...
9
votes
4answers
7k views

LibGDX keep camera within bounds of TiledMap

I have a simple TiledMap which I can render fine. I have a player hopping (with Box2D) around and my camera follows the player around: ...
4
votes
2answers
238 views

How to calculate Camera “correct” position and distance to Frame all my Scene?

Consider I have N dynamic points on my Scene, I would like to "frame" all them, with my Camera. How can i calculate (at runtime) Vector3 Position to correctly frame all my scene ? This is my idea: ...
3
votes
2answers
5k views

Implementing a camera on HTML5 canvas?

I am trying to work out the best way of implementing a camera in my simple 2d game. The way it is structured at the moment is my game objects all have draw ...
15
votes
5answers
5k views

What's the best head-bob formula?

Given a point in space, a direction of travel, and a time since start, what's a convincing, non-sickening formula to simulate head bob? What's been successful in previous games? Has there been any ...
11
votes
5answers
5k views

Camera Control Techniques in Games

I am an MPhil student in Computing Science working on the problem of camera control in graphics. Though the literature of camera control dates back to the end of 1980s, the majority of them (up to my ...
6
votes
3answers
6k views

Why / how does XNA's right-handed coordinate system effect anything if you can specify near/far Z values?

I am told repeatedly that XNA Game Studio uses a right-handed coordinate system, and I understand the difference between a right-handed and left-handed coordinate system. But given that you can use a ...
15
votes
6answers
4k views

Creating a seamlessly looping 2D multiplayer level?

A discussion came up recently about how to create a 2D side-scrolling multiplayer game that can have an looping level design (Think of Starbound and how their worlds are looping). I thought the ...
3
votes
2answers
1k views

3D zooming technique to maintain the relative position of an object on screen

Is it possible to zoom to a certain point on screen by modifying the field of view and rotating the view of the camera as to keep that point/object in the same place on screen while zooming ? Changing ...
2
votes
2answers
2k views

XNA Camera 2D confusion

I have followed the tutorial at http://www.david-amador.com/2009/10/xna-camera-2d-with-zoom-and-rotation/ to implement my 2D camera and everything works just fine. However this leaves me confused. ...
1
vote
1answer
2k views

Zoom Camera from C# in Unity

I am creating endless running game. I want to zoom camera when player dies to the player. I have tried using camera.FieldOfView, but it does not work. Is there another way to zoom In camera to the ...
1
vote
1answer
2k views

How do I snap the Unity camera to a 2D, tile-based map?

I have a 2D, tile-based map. I want to be able to control the number of visible tiles on the screen vertically and horizontally, regardless of resolution. I want the player to be able to move the ...
0
votes
1answer
133 views

Unity: When attaching my custom camera script camera shakes when player starts to move fast

Here is my player code. ...