Questions tagged [camera]

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

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89
votes
9answers
54k 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 ...
39
votes
5answers
20k 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 ...
37
votes
1answer
7k 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 ...
26
votes
2answers
7k views

Camera vs Viewport

I'm don't have a clear understanding of what precisely is the difference between the camera coordinates and the viewport coordinates. Can anyone please clarify?
25
votes
2answers
4k 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 ...
24
votes
5answers
15k 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 ...
21
votes
2answers
19k 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 ...
19
votes
4answers
50k 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 ...
18
votes
2answers
19k 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 ...
18
votes
2answers
24k 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 ...
18
votes
2answers
7k views

How to blend two cameras when traveling through a portal in Unity3D

Before I get to my question, I know the most obvious solution would be to use the normalized view port rect, however I need more complex shapes than a rectangle, and I've looked in to using the view ...
17
votes
4answers
9k 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?
16
votes
3answers
3k views

What is "simulated human operator" cutscene camera movement called?

I have some questions related to the non-smooth camera movement in cutscenes of quite a few games which appears to try and simulate the nervousness of a human operator holding it. This is opposed to ...
16
votes
2answers
97k views

How to use Input.GetAxis("Mouse X/Y") to rotate the camera?

I want to make a first person camera that rotates with the mouse. I looked at the Input.GetAxis Scripting API page and found a sample code, which I have included at the bottom of my post. Upon trying ...
16
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 ...
15
votes
6answers
5k 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 ...
15
votes
5answers
6k 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 ...
14
votes
3answers
9k views

How do I implement a quaternion based camera?

UPDATE The error here was a pretty simple one. I have missed a radian to degrees conversion. No need to read the whole thing if you have some other problem. I looked at several tutorials about this ...
14
votes
2answers
7k views

Why is 90° horz / 60° vert the default FPS Field of View?

As far as I understand it, vertical Field of View should be adjusted to: fov = 2 * arctan(0.5*screenHeight / distanceEyeScreen); That is, Field of View should ...
14
votes
1answer
762 views

Orthographic unit translation mismatch on grid (e.g. 64 pixels translates incorrectly)

I am looking for some insight into a small problem with unit translations on a grid. Update and Solved I solved my own issue. See below for details. Everything in this part of the post turned out to ...
13
votes
4answers
9k views

Why does clip space in OpenGL have 4 dimensions?

I will use this as a generic reference, but the more i browser online docs and books, the less i understand about this. ...
12
votes
3answers
15k views

How should I implement a first-person camera?

I'm a beginner programmer and I'm creating a project which allows me to walk around rooms via a first person camera. So far, I have the buildings drawn and on, but now I'm stuck and don't know how to ...
12
votes
1answer
2k views

How do I create multiple 2D spotlights?

I'm looking to create a 2D "spotlight" effect that allows a spotlight on multiple entities. I.e., as if several sprites were holding torches. For a single entity (one spotlight), I use a ...
11
votes
2answers
13k 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 ...
11
votes
5answers
6k 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 ...
10
votes
2answers
744 views

Rotating a 3rd person camera toward a target

I have a 3rd person camera that doesn't look directly at the player but somewhere in front of him. When the user enter shooting mode, I want the camera to turn around the player to face the target. ...
9
votes
4answers
8k 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: ...
9
votes
1answer
15k 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
1answer
2k views

Design of a camera system

Thinking about a common game, doesn't matter the type of the game, it's very likely that we need some camera type. For example: Debug camera: controlled by keyboard and mouse, with that we are able ...
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 ...
9
votes
1answer
302 views

Möbius effect in Unity

This morning I've seen the following animation on Twitter. It is a kind of Möbius strip effect. It's cool! Isn't it? So I've decided to build something similar using Unity, just for fun. I want to ...
9
votes
1answer
336 views

How to draw a Voronoi Splitscreen view in GMS, where each player's screen area is a polygon shape?

I'm trying to implement the Voronoi Splitscreen effect that Squirrel Eiserloh described at GDC 2016, and I'm having trouble figuring out how to 'clip' the rendered scene for one player along a ...
8
votes
2answers
22k views

Scale camera to fit screen size unity

My background and gameobjects are 2d sprites not UI images ,I want to know how to make my background scale with screen size and positions of 2d sprits on it don't change after building game (webGl) ...
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 ...
8
votes
2answers
2k views

Rotate a vector

I want my first-person camera to smoothly change its viewing direction from direction d1 to direction d2. The latter direction is indicated by a target position t2. So far I have implemented a ...
8
votes
2answers
14k views

How to rotate camera centered around the camera's position?

Currently I am using gluLook at like so: ...
8
votes
4answers
6k views

Detect if a sprite has left the camera in libgdx?

Is there a method to know if a sprite has left the camera of the stage? or I have to do my operations? :P
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 ...
8
votes
1answer
531 views

In a scrolling 2D game, should the objects move or should the camera move?

I'm new to game design and don't really know how things are done. I'm thinking of building an iOS game where a ship has to fly as high up as possible (at variable speeds), collecting power ups, et ...
8
votes
2answers
3k views

What would be a good game making engine supporting Vector images? [closed]

I want to create a simple platforming game, in which you are a square in a wonderful world. I would like this game to be able to be played in browsers. Basically I am searching for something similar ...
8
votes
1answer
2k views

What is the easiest way to Implement a 3rd Person Camera in C++/DirectX9

I'm pretty new to C++ and DirectX9 and I want to Implement a Third Person Camera. After some reading about Quaternion-based Cameras I decided to try Implementing it. But it really blow my mind, so I ...
7
votes
3answers
12k views

Determine corners of a specific plane in the frustum

I'm working on a game with a 2D view in a 3D world. It's a kind of shoot'em up. I've a spaceship at the center of the screen and i want that ennemies appear at the borders of my window. Now i don't ...
7
votes
5answers
5k views

Equation for bouncing graph?

I basically want my camera in 3D move automatically. Currently, I have linear movement which is rather dumb, so I'd like to do a bouncing movement. However, what is a good equation for bouncing? I ...
7
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 ...
7
votes
3answers
378 views

How does the camera/UI know who the player is?

I'm in a bit of a dilemma regarding how certain engine components — like camera and UI — know who to follow, whose health and other attributes to represent on the screen. How do you ...
7
votes
1answer
9k views

How do I create a bounding frustum from a view & projection matrix?

Given a left-handed Projection matrix, a left-handed View matrix, a ViewProj matrix of View * Projection - How do I create a bounding Frustum comprised of near, far, left, right and top, bottom planes?...
7
votes
3answers
9k views

Perfect FPS camera angle

I am making a multiplayer FPS and I am in search of some helpful tips on the perfect FPS camera angle. Because it is a multiplayer, I am making a full body model holding the gun, I find, however, that ...
7
votes
1answer
14k 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 ...
7
votes
4answers
2k views

Keeping sprites nice and pixelated

How do I keep the sprites in my game nicely pixelated on screens of all sizes and resolutions? I use nearest-neighbor texture filtering when resizing pixels, but this works well only at really high ...
7
votes
1answer
1k views

Swaying Camera when Walking

You can see the effect in many games. The camera sways or wiggles a bit while walking to make the movement feel more realistic. I have implemented a camera in my game. (Who'd have thunk it?) So is ...

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