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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12
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3answers
2k views

Why are there lines in between my tiles?

I'm making a top down XNA game. The maps are created by tiles. A problem I recently noticed is a 'grid' of lines between the tiles. It only shows up sometimes and only depending on the camera ...
1
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1answer
69 views

Can I rely on SoundEffects being stopped when unloaded?

I am using XNA's SoundEffect class to play sounds. I have to unload all sounds from the corresponding ContentManager for technical reasons, while some of them are still playing. What happens to ...
0
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0answers
75 views

Interactions between camera and procedural terrain

QUESTION REWORKED I need to update every frame camera position along a surface with hills and drops. In this picture you can see a particle of the surface terrain (just one triangle) and a sphere ...
0
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1answer
64 views

Issue with calling Spritebatch in XNA 4.0 Game [closed]

So, I am creating a game in XNA 4.0, using the program Microsoft Visual C# Studio Express 2010. The issue I am having: I have the entire game done, and there is no reason why it should not be ...
1
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1answer
97 views

Dealing with angles in 3D

In 2D everything is easier to understand. I'm not enought experienced to join people who say that 3d is the same: you JUST need to add a dimension - THAT adding a dimension is my problem, bacause I ...
0
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0answers
119 views

Smooth circular collisions with edges/collision boxes [C# + XNA]

So, me and a friend are working on our top-down perspective 2D game, and have come to work on perfecting our collisions. In its current state our player sprite is colliding with walls, but is ...
5
votes
5answers
2k views

More Efficient Data Structure for Large Layered Tile Map

It seems like the popular method is to break the map up into regions and load them as needed, my problem is that in my game there are many AI entities other than the player out performing actions in ...
0
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1answer
336 views

Incorrect colour blending when using a pixel shader with XNA

I'm using XNA 4.0 to create a 2D game and while implementing a layer tinting pixel shader I noticed that when the texture's alpha value is anything between 1 or 0 the end result is different than ...
3
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1answer
4k views

XNA + Windows Forms: How make them work together without making the trick of the custom GraphicsDeviceControl?

What I've found is a solution where you have to code a custom GraphicsDeviceControl to put inside the form (the well known tutorial from the APPHub), but that's not what I'm searching for. I would ...
0
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0answers
96 views

Collision - Per Pixel and Rectangle Based, Combined

UPDATE:i found the error in my calculation the problem was that i needed to consider if the image is rendered flip or not to fix it just need to rub from the opposite side of the sprite I am currently ...
1
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1answer
182 views

Angular velocity from 2D Collision

I have been working on a 2D physics engine for my A Level computing project and I am having trouble calculating the angular velocity from a collision. I have managed to workout each objects linear ...
1
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2answers
202 views

XNA blurring moving images

Why does XNA blurs the images which moves less than 1px in between two draws? It is quite annoying, because everything looks really blurry. Is there a way to disable it? I have tried to set the ...
0
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0answers
33 views

Farseer Physics, mass affecting velocity

I have just started with Farseer Physics, so I am kind of a newbie in this theme, so not a surprise that I have encountered something that is not involved by the engine, or I just don't know about it. ...
0
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1answer
60 views

xna 2.5d gravity system

i currently developing a game using the xna API. now the game i am developing is 2.5d. by 2.5d i mean the character or object can move left and right and a up and down(not just by jumping) that it ...
1
vote
1answer
214 views

Sharing the effect [closed]

my problem is : If I load 2 models ( the same model zombie ) and give them the same effect I got the following error : for(int i =0 ; i<2 ; i++) { dwarfModel[i].model ...
0
votes
1answer
175 views

How can I create my own GameTime for timing things in my game?

I have a Game class and a GameComponent class. I want to perform operations inside the GameComponent class which depend on calling gameTime.ElapsedGameTime.TotalSeconds, but I've noticed that that ...
2
votes
1answer
138 views

map the section of a procedurally generated surface on a plane

I'll try to be as clearer as I can. I have a surface on a 3D space which is not flat, it has hills and depths. My goal would be intersect it with a plane so that I can map the section of the surface ...
1
vote
2answers
104 views

Where does the Game class come from in the DrawableGameComponent constructor?

I'm making a project to Windows Phone using Silverlight + XNA, but I don't know how I can use the DrawableGameComponent because the constructor requires a Game class, it looks like this: Planet.cs ...
6
votes
3answers
668 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 ...
1
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0answers
139 views

Using obj file in an XNA game [closed]

Sorry if this is a bit novice but I am far more into engineering than game development but I just want to make a small 3D game for fun with XNA (well actually MonoGame). The thing is that I don't have ...
-1
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1answer
91 views

Why doesn't my XNA model render at all? [closed]

I am trying to draw a 3D Model in XNA 4.0, but it doesn't show up. I think I made it correctly, but maybe not. My code follows: Here is the LoadContent and Draw method of my Main class. Spaceship is ...
36
votes
8answers
19k 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 ...
0
votes
1answer
81 views

Height map renders upside down and/or backwards

After following the tutorial found here:http://www.riemers.net/eng/Tutorials/XNA/Csharp/Series1/VertexBuffer_and_IndexBuffer.php The code at the bottom of this page is what I am using. (I have ...
1
vote
2answers
100 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 ...
5
votes
1answer
363 views

How can I draw a perspective-correct quad?

I'm trying to draw a quad in 2D (in SharpDX, but that is basically XNA). But texture correction is not working, and I'm getting only an affine textured quad. I'm using BasicEffect to render it. ...
0
votes
1answer
109 views

XNA DepthBias increases performance even when EarlyZ is turned off. Why?

My 3d scene consists of three main polygons: The first and the second polygons overlap each other (have the same World matrix and use the same geometry), the third one is perpendicular to the first ...
0
votes
3answers
155 views

Why I am I told “Color0 is missing” when I run the following code?

In the code below, I want to draw a box on my screen. But when I run it, there is an error message: The current vertex declaration does not include all the elements required by the current ...
1
vote
1answer
492 views

Unable to create suitable graphics device?

I've been following the Eye of the Dragon tutorial, which is basicly a guide to making a 2D RPG game, obviously. I recently finished the tutorial about making pop up screens in the menu and changed ...
2
votes
1answer
110 views

How do I check if a surface is sloping?

I'm implementing gravity over a 3D terrain and I'm struggling with how to check if surface "under your feet" is flat or sloping. I read some tutorials but gravity is always considered along a single ...
3
votes
1answer
950 views

Deferred rendering with VSM - Scaling light depth loses moments

I'm calculating my shadow term using a VSM method. This works correctly when using forward rendered lights but fails with deferred lights. // Shadow term (1 = no shadow) float shadow = 1; // [Light ...
1
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1answer
254 views

World to Pixel Transformation

My objects have a location in world coordinates (basically 1.0f is a meter). If I simply draw my objects using their world coordinates, each meter will correspond to a pixel. Obviously that's not what ...
46
votes
3answers
10k 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?
1
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2answers
2k views

Load Texture From Image Content In Runtime

Basically I wrote a world editor for a game I'm working on. Looking ahead, I was brainstorming ways to save the created world including the tile-sets (this game will rely on a tile engine). I was ...
0
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2answers
304 views

Add a “fake” Loading Screen

I'm working on a 2D game for WPF8 using XNA 4.0. Everything goes great, but it's too fast. I was just wondering, what could I do between the end of the game and the score screen, and before the game ...
3
votes
1answer
527 views

How can I use orientation to compute position in Windows Phone 7? [closed]

I'm using the motion API and I'm trying to figure out a control scheme for the game I'm currently developing. What I'm trying to achive is for an orienation of the device to correlate directly to a ...
0
votes
1answer
128 views

Where does XNA 4.0 takes memory from to perform operations?

I found this question which talks around the question I'm interested in. In particular I focused on the line where the guys says that GraphicsDevice object is literally a representation of the ...
6
votes
1answer
168 views

How should I attenuate sound in a 2D game where you can zoom in and out?

In my 2D game, I have some ambient sounds like the noise of a waterfall or the humming of a generator. However, it is not practical to play these sound all the time at full volume as in a large level ...
8
votes
2answers
881 views

What are some ways to texture map a terrain?

I'm working with XNA on a 3D Game, and I'm trying to have a proper and nice environnement. I actually followed a tutorial to create a terrain from a heightmap. To texture it, I just apply a grass ...
0
votes
1answer
341 views

Rope Colliding with a Rectangle

I have my rope, and I have my rectangles. The rope is similar to the implementation found here: http://nehe.gamedev.net/tutorial/rope_physics/17006/ Now, I want to make the rope properly collide ...
1
vote
2answers
649 views

SpriteFont Exception, no such character?

I have such spriteFont: <?xml version="1.0" encoding="utf-8"?> <!-- This file contains an xml description of a font, and will be read by the XNA Framework Content Pipeline. Follow the ...
1
vote
1answer
388 views

Get screen bounds of 3D object

I'm trying to draw a 2D plane that has minimum dimensions to contain a 3D model (a sphere). How do I calculate the minimum size and position of the rectangle to completely cover a 3D model on screen?
4
votes
2answers
140 views

XNA Transparency depending on drawing order?

I am drawing two 3D objects, both of them can fade from opaque to transparent independently, and they can intersect between them (so you cannot say when one of them is before the other one). Look at ...
2
votes
2answers
1k views

XNA 2D line-of-sight check

I'm working on a top-down shooter in XNA, and I need to implement line-of-sight checking. I've come up with a solution that seems to work, but I get the nagging feeling that it won't be efficient ...
0
votes
0answers
87 views

Avoiding lag when rendering Texture2D for first time

I have found a similar question here, but it is about playing sounds. I am using 2048 x 2048 textures for sprite sheets and every time I call spriteBatch.Draw using a sheet for the first time in game ...
2
votes
3answers
1k views

Creating Rectangle-based buttons with OnClick events

As the title implies, I want a Button class with an OnClick event handler. It should fire off connected events when it is clicked. This is as far as I've made it: public class Button { public ...
0
votes
1answer
148 views

Changing enum in a different class for screen

I'm trying to make a start menu for my game and my code uses Enum's to moniter the screen state. Now i want to change the screenstate declared in the main class, in my Background class Screen screen ...
0
votes
1answer
203 views

Obtain rectangle indicating 2D world space camera can see

I have a 2D tile based game in XNA, with a moveable camera that can scroll around and zoom. I'm trying to obtain a rectangle which indicates the area, in world space, that my camera is looking at, so ...
4
votes
4answers
628 views

The physics equation for a perpetual seesaw

I am trying to create a game that involves two or more people jumping on a seesaw and propelling each other in the air. I need help with the physics equations Assume no friction and no air ...
1
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1answer
326 views

Best way to load texture2d tiles in xna?

I am making a test xna game as a learning exercise and I have a small question about using 2d textures. Basically the game is a grid of different 'tiles' which are taken from a text map file. I ...
1
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1answer
343 views

XNA - Where should I start playing a song?

I am just wondering where is the best place to start playing the background song for a game. In the loadContent() method, Draw(), or Update() methods or when I initialize it? I am trying to make it ...