xna

How can I use a Shader in XNA to color single pixels?

I have a standard 800x600 window in my XNA project. My goal is to color each individual pixel based on a rectangle array which holds boolean values. Currently I am using a 1x1 Texture and drawing each sprite in my array. I am very new to XNA and come from a GDI background, so I am doing what I would have done in GDI, but it doesn't sc...

Opening XNA Xbox 360 assemblies in Reflector

I'd like to get a look at the differences between the Xbox 360 and Windows XNA assemblies. I know the 360 runs the .NET Compact Framework and I was under the impression that Reflector could read CF assemblies, but when I open them, all of the methods are blank and no internal classes are shown. Is this done on purpose, or is it a limita...

XNA: What can cause SpriteBatch.End() to throw a NRE?

I don't understand what I'm doing wrong here: public void Draw(GameTime gameTime) // in ScreenManager { SpriteBatch.Begin(SpriteBlendMode.AlphaBlend); for (int i = 0; i < Screens.Count; i++) { if (Screens[i].State == Screen.ScreenState.HIDDEN) continue; Screens[i].Draw(gameTime); } Sprite...

Assembly Microsoft.Xna.Framework.dll does not load

When trying to load Microsoft.Xna.Framework.dll from any project, it throws a FileNotFoundException. The specified module could not be found. (Exception from HRESULT: 0x8007007E), with no innerException. Even the simple code like the following throws that exception: static void Main(string[] args) { Assembly.LoadFile(@"C:\Microsoft.Xn...

Box2dx: Specify fixtures to ignore in raycasting?

Everybody in my game world has fixtures with sensor shapes attached. When I raycast, it hits these fixtures, but I only want to hit fixtures with at least one shape that is not a sensor. Is this possible? I'm using Box2dx - the C# port. Also, what does the callback do? world.PhysicsWorld.RayCast((f, p, n, fr) => { ...

Odd "Object reference not set to an instance of an object" involving xWinForms

Hey, I've been trying to get the xWinForms 3.0 library (a library with forms support in xna) working with my C# XNA Game project but I keep getting the same problem. I add the reference to my project, put in the using statement, declare a formCollection variable and then I try to initialize it. whenever I run the project I get stopped o...

Box2d: Maximum possible linear velocity?

I think I've configured Box2d to have some sort of maximum velocity for any body, but I'm not sure. I apply an impulse like (100000000, 100000000), and the body moves just as fast as (100, 100) - which is not that fast at all. I'm using the Box2d XNA C# port. My game is a top-down 2d. Here is some code that may be relevant: private r...

Which version of .NET is available for Xbox 360?

I tried to look this up on MSDN, but couldn't get a straight answer. It says: The .NET Compact Framework for Xbox 360 implements a subset of the .NET Compact Framework, and has been optimized to take advantage of and expose the power of the Xbox 360. What exactly is the subset? Which version of the framework? 3.5? 2.0? ...

XNA and Ninject: Syntax for dependency arguments?

I have a class with a public constructor: public MasterEngine(IInputReader inputReader) { this.inputReader = inputReader; graphicsDeviceManager = new GraphicsDeviceManager(this); Components.Add(new GamerServicesComponent(this)); } How can I inject dependencies like graphicsDeviceManager and new Gam...

How to use Ninject with XNA?

I'm having difficulty integrating Ninject with XNA. static class Program { /** * The main entry point for the application. */ static void Main(string[] args) { IKernel kernel = new StandardKernel(NinjectModuleManager.GetModules()); CachedContentLoader content = kernel.Get<CachedContentLoader>(); //...

Box2d: Set active and inactive

I'm writing an XNA game in C# using the XNA port of Box2d - Box2dx. Entities like trees or zombies are represented as GameObjects. GameObjectManager adds and removes them from the game world: /// <summary> /// Does the work of removing the GameObject. /// </summary> /// <param name="controller">The GameObject to be remo...

XNA: What is the point of Unload()?

XNA games have an Unload() method, where content is supposed to be unloaded. But what is the point of this? If all the content is being unloaded, then the game must be exiting, in which case everything would be garbage collected anyway, right? ...

Turn Texture Blending off in XNA

I am currently drawing single colored pixels to my texture in XNA. However, there seems to be blending occuring, as the color I draw on the screen gets blended with my background color. How can I turn this off so that the color I draw is only the color I draw? this.spriteBatch.Draw(texture, new Rectangle(x, y, 1, 1), [My Color]); ...

Problems running XNA game on 64-bit Windows 7

I'm having problems getting my game engine to run on my brother's machine, which is running 64-bit Windows 7. I'm developing on 32-bit XP SP2. My app uses XNA, FMOD.NET, and another dll I wrote entirely in C#. Everything is targeted to x86, not AnyCPU. I've read that this is required for XNA to work because there is no 64-bit xna framew...

XNA or C# Pop-up progress bar for the LoadContent() method

Hey people, We wrote a small game using Microsoft's XNA Game Studio 3.1. The LoadContent() takes a long time because, other than loading models, and config files, we're also running some one-time (per run) terrain analysis. We are not C# or XNA programmers... we're Java programmers, and want to be able to give the user some feedback th...

Render multiple layers in XNA

I'm using XNA, and I've run into a little problem. I need to support multiple layers, each with a distinct z order (I call these "viewports"). A picture is worth a thousand words, so here's what it should look like: There are several things to notice here. Sprites do not render outside of their viewport, as you can see with Sprite B. ...

ColorMatrix equivalent in XNA

In XNA, how can I achieve the same effect of applying a System.Drawing.Imaging.ColorMatrix? The following article shows how I would like to render my sprites, but it uses GDI+: http://www.c-sharpcorner.com/UploadFile/mahesh/Transformations0512192005050129AM/Transformations05.aspx How can this be done in XNA? Is there a general purpose ...

Detecting run-time game platform in XNA

I'm working on a C# XNA project that requires me to display information based on the platform the game is on. Is there a way to detect the platform (XBox, Windows, Zune) during run-time? ...

A Null Reference Exception

"Object reference not set to an instance of an object." using System; using System.Collections.Generic; using System.Linq; using System.Text; using Microsoft.Xna.Framework; using Microsoft.Xna.Framework.Content; using Microsoft.Xna.Framework.Graphics; namespace XNAdev { class Sprite { //The size of the Sprite pu...

Collision Detection for arbitrarily sized, positioned and rotated rectangles in XNA

I'm working with xna in C# and in my game I will have a variety of space ships flying all over the place. They will each have an arbitrary rotation, size and position in space and I need a method to determine when they collide. Ideally the method would take two Rectangles, two doubles and two Vector2s for size, rotation and position resp...