XNA Game Studio 4.0 is a programming environment that allows you to use Visual Studio to create games for Windows Phone, the Xbox 360 console, and Windows-based computers.

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51
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3answers
12k views

Optimizing an XNA 2D game

Does it make sense to implement the logic to skip rendering objects outside the viewport or should I not care about it and let the Framework do it?
42
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8answers
30k views

How'd they do it: Millions of tiles in Terraria

I've been working up a game engine similar to Terraria, mostly as a challenge, and while I've figured out most of it, I can't really seem to wrap my head around how they handle the millions of ...
3
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3answers
4k views

Alpha blending not rendering properly XNA 4.0

I'm trying to render a tree made out of 2 rectangles intersecting in the center at a 90degree angle. The texture has an alpha channel but which ever rectangle gets rendered second causes a weird ...
3
votes
2answers
4k views

Loading and unloading “chunks” of tiles in a 2d tile engine with 2d camera

I am making a 2d tile based game in C# and XNA 4.0. I am having trouble loading and unloading "chunks" of tiles(blocks). The whole world is randomly generated and is infinate on both axis. How would I ...
15
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2answers
9k views

How do I disable texture filtering for sprite scaling in XNA 4.0?

I have a sprite that I'm trying to scale up in XNA, but XNA is applying some sort of texture filtering that smooths it and makes it look ugly. I'd like it to just do pixel doubling instead of ...
13
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1answer
3k views

Disposing only certain resources in XNA?

The ContentManager in XNA 4.0 only has one Unload() method that Unloads all Assets. I want to have some "global" Assets that are always loaded, but then I want per-Level Assets which should be ...
7
votes
1answer
3k views

Sidescroller variable terrain heightmap for walking/collision

I've been fooling around with moving on sloped tiles in XNA and it is semi-working but not completely satisfactory. I also have been thinking that having sets of predetermined slopes might not give me ...
9
votes
5answers
1k views

How can I simulate shattering glass?

I need to make a simulation with stone thrown through a glass window. How can I accomplish that? I mean, I was thinking about making a 3D model of a stone and glass in 3D Studio Max 2012, shatter the ...
4
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1answer
2k views

XNA Platformer Sample: Supporting multiple resolutions?

I have been looking at the XNA Platformer Sample and noticed that, when you change the resolution, the game world still renders at 800x480 and not the new width and height of the display. Can anyone ...
10
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5answers
6k views

45° Slopes in a Tile based 2D platformer

I want to have simple 45° slopes in my tile based platformer, however I just cant seem to get the algorithm down. Please take a look at the code and video, maybe I'm missing the obvious? //...
5
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1answer
3k views

Friction in 2D game

I'm developing a 2D platformer, although this question could probably apply to just about any 2D type physics; What is the equation for friction? I have sort of a hacky type of friction set up in my ...
3
votes
2answers
2k views

Depth buffer and render target

When I use this RenderTarget: renderTarget = new RenderTarget2D(GraphicsDevice, GraphicsDevice.Viewport.Width, GraphicsDevice.Viewport.Height, false, SurfaceFormat.Color, DepthFormat.Depth24); ...
15
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2answers
4k views

Creating an electricity/lighting/tesla coil effect in a 2D XNA game?

I'd like to create beams of electricity between two points very similar to this video: http://www.youtube.com/watch?v=eMJ8-56L3Lc. The effect is so dynamic, with varying lengths and pseudo-random ...
7
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2answers
7k views

How do I enable higher FPS in XNA 4.0?

I created a FpsCounter DrawableGameComponent (linked to code, it's longish). It works great: It displays 60.0 fps normally. If I artificially slow down the game loop, it drops. My 'game' at the ...
8
votes
1answer
1k views

How To Approach 360 Degree Snake

I've recently gotten into XNA and must say I love it. As sort of a hello world game I decided to create the classic game "Snake". The 90 degree version was very simple and easy to implement. But as I ...
2
votes
2answers
2k views

Using 2D sprites and 3D models together

I have gone through a few posts that talks about changing the GraphicsDevice.BlendState and GraphicsDevice.DepthStencilState (SpriteBatch & Render states). . however even after changing the states ...
0
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2answers
954 views

XNA change a specific color of a model to another

Is it possible to change a specific color of a model to another? Example: Everything that's blue should be red or something like that. And is it possible to do this without the use of effects? I ...
13
votes
1answer
3k views

How can I create gradiented Fog of War?

I'm creating a top down 2D RTS game for educational purposes. Currently, I'm really just copying Starcraft's design/ideas. I've decided I should probably implement Fog Of War too. My expectations: ...
13
votes
1answer
1k views

How do I prevent XNA from pausing Updates while the window is being resized/moved?

XNA stops calling Update and Draw while the game window is being resized or moved. Why? Is there a way to prevent this behaviour? (It causes my network code to desynchronise, because network ...
7
votes
5answers
4k views

2D Procedural Terrain Generation - Guaranteeing connectedness?

I'm working on a 2D platformer in XNA. One of things I'd like to be a main design characteristic is procedural content generation. The first step of that is to procedurally generate the terrain. So, I'...
14
votes
1answer
3k views

How do you add equipment to a 3D character model using XNA/Blender?

I've watched quite a few Blender tutorials, but I have yet to see examples of how to swap out sub-models. So my question is, how do you swap out equipment on a character model? Specifically I’d like ...
4
votes
1answer
232 views

Creating rectangles from the inner part of a texture2D

This may be hard to understand, but I'll do my best. You will see that the first image is a normal Mario, and the other is the result I am looking for. I'm trying to find a way to extract ...
7
votes
1answer
4k views

Resolution Independent 2D Rendering in XNA

I am trying to figure out the best way to render a 2d game at any resolution. I am currently rendering the game at 1920x1200. I am trying scale the game to any user selected resolution without ...
7
votes
3answers
1k views

How do I make a moving object stop smoothly at the end of a path?

There are a dozen ways I could word this question, but to keep my thoughts in line, I'm phrasing it in line with my problem at hand. So I'm creating a floating platform that I would like to be able ...
4
votes
3answers
970 views

When does depth testing happen?

I'm working with 2D sprites - and I want to do 3D style depth testing with them. When writing a pixel shader for them, I get access to the semantic DEPTH0. Would writing to this value help? It seems ...
2
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2answers
2k views

What's efficient way to draw a lot of textured cubes in XNA4?

Title says it all. What's efficient way to draw a lot of textured cubes in XNA4?
7
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2answers
4k views

The true cost to get my XNA game on XBox?

There seem to be many hurdles to get ones game onto Xbox, so far I have uncovered: You need Visual Studio (once your game becomes commercial you cannot use Express - but have to pay for professional)...
6
votes
1answer
548 views

2D Magnet-like repelling behavior

If somebody wanted to develop a system between two intersecting rectangles so that the rectangles would, in a gradual process, push eachother away from one another until no longer intersecting, with ...
4
votes
2answers
444 views

Does XNA support 1 dimensional textures

Does XNA support 1 dimensional textures. And by 1 dimension texture I mean something like Texture1d not a Texture2d where one dimension is 1 (because of the 4096 limit)
4
votes
2answers
3k views

Drawing a texture line between two vectors in XNA WP7

I want to create a simple graph maker in WP7. The goal is to draw a texture line between two vectors what the user defines with touch. I already made the rotation, and it is working, but not ...
3
votes
2answers
4k views

Weird behavior with XNA SpriteBatch.Draw origin

I have a texture with 256x256 pixels. Consider this piece of code: protected override void Draw(GameTime gameTime) { GraphicsDevice.Clear(Color.CornflowerBlue); spriteBatch....
2
votes
1answer
164 views

Is it bad practice to add GameComponents and DrawableGameComponents outside of the main initialization method?

I'm working on a snake game that has multiple game objects (snakes, apples, obstacles), and game modes (classic, adventure), that are DrawableGameComponents. Is it OK that I'm adding them as needed ...
2
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2answers
2k views

How does flocking algorithm work?

I read and understand the basic of flocking algorithm. Basically, we need to have 3 behaviors: 1. Cohesion 2. Separation 3. Alignment From my understanding, it's like a state machine. Every time we ...
2
votes
2answers
1k 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
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2answers
117 views

margin of error trying to check if a point lays on line

Working with floating point values it is as easy as breathing to run on approximation errors by comparing quantities which should be the same. I want to know if there is a way built in some MSDN (or ...
1
vote
2answers
2k views

Create a body of an irregular 2D sprite in Farseer

I'm trying to create a body of a irregular 2D sprite Farseer 3.3.1. The regular shapes that BodyFactory provides are not that I want. Is there a way that one can create irregular objects? Could it be ...
1
vote
2answers
560 views

How can I project a vector on another vector?

I have a generic not normalized Vector3 v1 and I want to calculate its component along another Vector3 v2. I used to normalize the vector I want to be the direction and then multiplying the other ...
16
votes
2answers
26k views

Error on new XNA 4.0 game project - No suitable graphics card found

Any ideas on how to fix this? According to what I remember about XNA 3 was that when running the application from scratch, I would get a blue colored windows with nothing rendered. Any suggestions? ...
6
votes
2answers
566 views

How does one specify raster operations in XNA?

I'm looking for a way to add a sprite using a particular logic operation (like XOR). I can't find anything on Google and I'm not sure where to look in the documentation. I've looked into SpriteBatch....
5
votes
1answer
535 views

How to attach two XNA models together?

I go back on unsolved question I asked about attaching two models together, could you give me some help on this ? For example, If I want to attach together Model1 (= Main model) & Model2 ? I ...
5
votes
1answer
379 views

How can I remove Magic Pink from an image at runtime using GraphicsDevice?

In XNA 4.0, I want to load all my textures at runtime, which means I will not be able to take advantage of the content processor. (This is fine because it would allow people to change graphics and ...
4
votes
1answer
148 views

Why does CameraZ=0 result in no render?

I am trying to draw simple model, but I am experiencing strange error. When I use this View matrix: Matrix.CreateLookAt(new Vector3(0, 200, 1), new Vector3(0, 0, 0), Vector3.Up); my model is drawn ...
3
votes
1answer
2k views

XNA mouse position in windows forms

I am using this code in Update method in XNA RenderControl in Windows Forms: ... Mouse.WindowHandle = renderControl1.Handle; MouseState stat=Mouse.GetState(); ... Everything works fine but when I ...
3
votes
1answer
348 views

How to access the nth element in a 2d texture from a pixel shader in XNA

How can I access the nth element in a texture2d from a pixel shader? For example if I wanted to get the 5th vector4 from 10 x 10 texture2d
3
votes
1answer
1k views

2D platformer corner collision

Repost from my question on stack overflow, didnt know this site existed. I have a 2d platformer and I need help with collision. To show you my current collision system, here is picture: Top picture ...
3
votes
1answer
4k views

Adding SpriteFont in Monogame

My question is probably something you guys have heard before - "How do you add SpriteFont's in Monogame's content manager?" The simple answer to this is, right click the 'Content' folder, go on 'Add ...
3
votes
2answers
565 views

Cutting out smaller rectangles from a larger rectangle

The world is initially a rectangle. The player can move on the world border and then "cut" the world via orthogonal paths (not oblique). When the player reaches the border again I have a list of path ...
2
votes
2answers
691 views

How to store “chunks” of tiles or How to make my implementation work

I asked a previous question about the loading and unload of chunk data and people noted that my way of storing chunks is weird and I was wondering how I would go about doing it properly. @Byte56 ...
2
votes
2answers
1k views

Background blur in 2D game?

In an XNA 2D game, I am thinking about blurring the background slightly to increase the feeling of depth? I am already using parallax scrolling which works pretty well in terms of enhancing depth ...
2
votes
2answers
807 views

Applying Angular Acceleration in a Basic Physics Model

I'm attempting to use a basic physics system to create an arcade flight model. So far I have managed to get the aircraft moving forward, apply gravity, etc. However, after trying to implement torque I ...