Questions tagged [xna]

XNA is a game framework by Microsoft that allows deployment for Windows, Windows Phone & Xbox 360.

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What is the difference between a Viewport and a Scissor Rectangle?

In XNA, what is the difference between a Viewport and a Scissor Rectangle, and when should I use each one? It looks like viewport clipping is applied to the geometry before the rasterization state, ...
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1answer
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Why am I seeing elapsed game time differ from total game time in XNA?

I was trying three different ways of using ElapsedGameTime and TotalGameTime, because I want an exact match, so everything is ...
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How do I communicate with an IronPython component in a C#/XNA game?

My XNA game is component-oriented, and has various components for position, physics representation, rendering, etc, all of which extend a base Component class. The ...
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5answers
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How to get elapsed time of keypress?

I need to be able to determine how long a key has been held down with high accuracy. For example if they key tapped really fast it could report a time that is less than the time for each update frame.
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2answers
810 views

Is there a limit to Gametime.TotalMilliseconds?

Gametime should always be increasing, and totalmilliseconds is going to be the largest value. So if the game is hypothetically run for 1 day, this value should 86 400 000. This probably isn't a ...
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3answers
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Load all content from folder

I want to ask, is there way to load in xna all content from folder ? For example in my content I have: Images/hero Images/car Images/tree I want to make something like this ...
8
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1answer
443 views

How can I selectively update XNA GameComponents?

I have a small 2D game I'm working on in XNA. So far, I have a player-controlled ship that operates on vector thrust and is terribly fun to spin around in circles. I've implemented this as a ...
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Drawing huge amount of tiles in Monogame (XNA) efficiently

I'm asking this question because I haven't found a definitive answer to it. Let me first of all state a few things about the game and what I have already done. The game is a going to be a RTS set in ...
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How do I letterbox a C#/Monogame viewport within a resizeable window?

I am making a 2d game with xna/monogame. I want the main view area to always show 15x15 tiles, or 480x480px. I've got something that sort of works, following this guide. It expands the view range if ...
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3answers
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Is there a good existing starting point for realistic 2d racing car physics?

I'm trying to get a realistic behaving racing car into my 2d top-down game. Making a very simple car that drives around is straight forward but I want a reasonably sophisticated model that models ...
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2answers
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How do I access variables in the Game1 class from another class in XNA?

I'm trying to write a SpriteManager class in XNA, but I need access to the Game variables. For example, the ...
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2answers
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How to use XNA in WPF?

How can I render some graphics using XNA to a widget/control in a WPF app? Specifically, I don't need any WPF controls inside the XNA graphics window, I just want to put some controls around it for a ...
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814 views

Developing an RPG Encounter System

I'm in the middle of an encounter system for an XNA RPG. The idea is, you walk around a dungeon, and certain tiles are makred as RandomBattleTiles, and you have an area in the map defining what ...
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1answer
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Why does XNA's ContentManager follow generic type parameters for serialization purposes?

I've finally gotten to the bottom of a problem and am wondering what my best recourse is. In short, the problem is that XNA's ReflectiveReader reflects into generic ...
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1answer
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How to create a XNA texture from a GDI Image with source rectangle?

A Texture2D in XNA can only hold so much. Depending on which profile I use that limit is either 2048 or 4096 pixels wide. As far as I could tell from my research (someone correct me if I'm wrong) GDI ...
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1answer
465 views

Billboard draws fine on PC, not on XBOX

The moon is drawn with two draw calls, but both draw wrong on the xbox so I'm just displaying one draw for simplicity. This is how the moon should look on the PC: How it looks on the XBOX: The ...
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3answers
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Inverted textures

I'm trying to draw textures aligned with this physics body whose coordinate system's origin is at the center of the screen. (XNA)Spritebatch has its default origin set to top-left corner. I got the ...
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1answer
2k views

Timestep in multiplayer game

I'm trying to wrap my brain around the concept of creating a server/client multiplayer experience. My problem is mainly related to timestep. Consider the following scenario: A client connects to ...
8
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1answer
1k views

How do I stop stretching during window re-size in XNA?

In my windowed mode XNA game when the user resizes the window the game stops updating the window and the last frame drawn is stretched and distorted until the user releases the mouse and the resize ...
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1answer
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Drawing “Stenciled” Sprites and making them glow

Currently, in my game - I'm not using XNA's SpriteBatch to render anything(I am using Farseer Physic's Debug View), and I was wondering how I would render something like this: only using XNA. My ...
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2answers
1k views

How to loop section from a song correctly?

I'm programming a little Music Engine for my game in C# and XNA, and one aspect from it is the possibility to loop a section from a song. For example, my song has an intropart, and when the song ...
8
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1answer
442 views

Picture rendered from above and below using an Orthographic camera do not match

I'm using an orthographic camera to render slices of a model (in order to voxelize it). I render each slice both from above and below in order to determine what is inside each slice. The model I ...
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2answers
617 views

Automating XNA Performance Testing?

I was wondering what peoples approaches or thoughts were on automating performance testing in XNA. Currently I am looking at only working in 2d, but that poses many areas where performance can be ...
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Implementing water effects (splashes) into XNA 4.0 game [closed]

I am creating a 2D XNA game and came across a tutorial on adding water effects (splashes) to an XNA game but after implementing it into my game I can't get it to scale down. Currently it takes up the ...
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How do I reconstruct depth in deferred rendering using an orthographic projection?

I've been trying to get my world space position of my pixel but I'm missing something. I'm using a orthographic view for a 2.5d game. My depth is linear and this is my code. ...
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What are some good resources for creating a game engine in XNA? [closed]

I'm currently a student game programmer working on an indie project. We have a team of eleven people (five programmers, four artists, and two audio designers) aboard, all working hard to help design ...
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3answers
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How do I make objects move along a path?

I'm trying to get something like the below image. As you can see, there's a highway and inside of it, there'll be some objects moving (millisecond). I guess the street behavior is like a pipeline. ...
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2answers
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Need simple 3D terrain render with big texture map

I have a 1000 x 700 height map I have a 1000 x 700 texture map I did something very similar about 8 years ago: Using XNA. Unfortunately, when I bring up this old project and convert it to Visual ...
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1answer
20k views

How can I draw a simple 2D line in XNA without using 3D primitives and shders

I would like to be able to draw arbitary lines in my sprite based 2D XNA game. How can I draw a simple line on screen in XNA without dealing with vertex arrays or shaders.
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3answers
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A cool way of doing Z-index for XNA components?

I am trying to render some elements in my game. First, I render the textures (the textures of the textboxes themselves etc). Then I render the primitives (borders around controls etc). Then I render ...
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2answers
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How to determine collision direction between two rectangles?

I am trying to figure out how to determine the direction a collision occurs between two rectangles. One rectangle does not move. The other rectangle has a velocity in any direction. When a collision ...
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5answers
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Best pathfinding algorithm for a tower-defense game? [duplicate]

What do you suggest would be the best algorithm for a tower-defense game? It's a 2D based tile game, where there is walls and towers blocking the way, between spawnpoints and their destination points. ...
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Why do objects interpenetrate in this simple collision solver?

The code below is from a Microsoft XNA sample here. This is quite a simple rigid body simulation that ignores many physical effects (such as angular momentum), but it does try to push objects (spheres)...
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4answers
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Using XBOX controllers on PC for an XNA game

Does anybody know how to do this? I have been trying to figure this out with no luck.
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2answers
9k views

How to get mouse position relative to the map?

I'm creating a game in XNA similar to Minecraft - Minecraft 2D It looks like this Here's how it works: All blocks are generated once with fixed x,y coordinates and just re-drawn. ...
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2answers
9k views

Quad Tree with a lot of Moving Objects

I have a Quad Tree implementation that is very useful for what I am trying to do. My problem is that when my viewport has a lot of objects, the Update for the Quad Tree takes a very long time. It ...
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2answers
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Random World Generation [duplicate]

Possible Duplicate: How are voxel terrain engines made? I'm making a game like minecraft (although a different idea) but I need a random world generator for a 1024 block wide and 256 block tall ...
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3answers
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Shifting from XNA/C# to C++? [closed]

For a while now, I've been working with XNA for game design and development (although only for personal use ATM.) Overall, I'm a major fan of XNA itself, and it's overall "feel." However, due to the ...
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4answers
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How do you manage your game resources in XNA?

In the past I have used Content.Load<type>("filename"); all over the place. This quickly becomes a nightmare to manage and worse you start having multiple ...
7
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2answers
10k 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 ...
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2answers
363 views

Does the older Xbox 360 Elite support XNA 4?

Can I develop an XNA 4.0 game for the older Xbox 360 Elite? Or would I need a newer Slim model?
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How can I use XNA with Visual Studio Express 2013 for Windows?

http://dev.windowsphone.com/en-us/downloadsdk I downloaded the current version of Visual Studio to develop Windows Phone apps, but I don't know how to add XNA. I tried to install XNA, but it's not ...
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1answer
661 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 ...
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4answers
543 views

I made a game in XNA - how can I share it with my friends?

I've just finished programming a charming (albeit bare-bones) XNA version of arcade classic Tempest. Hooray! Given that this was a homework assignment, I'd like to be able to share it with my ...
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2answers
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Stuck in Wall after rectangle bounding box collision

Using XNA's built in Intersects() on two Rectangles, I can detect a collision and set my velocity to zero. However, the object is stuck there and can't get out! How can I resolve this collision ...
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4answers
13k views

2D Platform Game Jumping

I'm currently writing a game in XNA for fun which uses C#. I have got my sprites loaded and when the character moves right he looks like he is running right and when he moves left he looks like he is ...
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2answers
665 views

Simulate movement towards the screen in a 2D world

I need to create the illusion of someone kicking a ball to the screen. For that, I have a initial position of the ball (about the middle of the screen), and I put the sprite of the ball scaled at 0.2 ...
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2answers
7k views

C# Perlin noise - generating “endless” terrain chunks?

I'm currently writing a little side scroller in C#, to both learn C# and have fun. Right now I have a simple random number generator generating the world but it isn't exactly all that great - so with ...
7
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1answer
740 views

Global keyboard states

I have following idea about processing keyboard input. We capture input in "main" Game class like this: ...
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1answer
2k views

Character bouncing off ground due to gravity

Implementing gravity in the game, the character keeps bouncing up and down slightly when he hits the ground, upon debugging the character is essentially bouncing on and off the ground. Not quite sure ...

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