XNA is a game framework by Microsoft that allows deployment for Xbox Live Indie Games as well as Windows Phone 7.

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297 views

Need help with objects moving toward the player

I am making a 2D game with simple "gravity": everything is just pulled toward 0,0. The speed at which they accelerate towards it is GravityAcceleration up to MaxGSpeed. I also want the player to be ...
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246 views

Bone pivot mirroring problem in 3dmax

Im make model with animation in 3dsmax and port it to XNA game. All works fine except one character hand. I suspect its all about pivot and kinematics. When I create hand bone from scratch the ...
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377 views

3D Model transparency issue

I am using Goblin XNA 3.6. When I export a 3D model in FBX format from Maya, the model often looks transparent. For some 3D models it works fine though. What could be causing this?
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165 views

Farseer Physics EndContact events don't fire for all registered delegates

Here's my situation: I have several objects that contain a body and a fixture. They are set to sensor = true; atmosphere = BodyFactory.CreateCircle(world, atmosphereRadius / Level.METER_IN_PIXELS, ...
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284 views

Why does drawing bounding boxes disable my other shaders?

I have some .X models loaded via self-written AssetManager that has Lists with models in it. I also apply a diffuse shader to my models. All the models are "self-drawing" in a BasicModel class. ...
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24 views

raise an event when an object appears using HLSL and XNA

I've written an HLSL code to make transparency of player using depth view of Kinect on the background image. this is my HLSL code : sampler stream : register(s0); sampler back : register(s1); sampler ...
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45 views

Basic .FBX Animation for the Complete Novice

okay, so in terms of 3D in XNA, I am pretty much a total beginner. I know all my matrices, basic lighting, transforms etc, but I'm finding 3D animation very confusing. I have been looking a bit at the ...
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29 views

How set window position?

How set window position? Monogame version: https://www.nuget.org/packages/MonoGame.Binaries/3.2.2-alpha This dont work because OpenTKGameWindow is internal: ...
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28 views

In XNA, how does KeyboardState work internally?

I already understand how to work with Keyboard and KeyboardState, but when debugging I happened to take a look at the KeyboardState's non-public members via the VS debugger. I expected to see a large ...
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12 views

3D Model in the midst of tracking state inferred and tracked

I am developing Kinect motion capture application by using XNA framework.My 3d model's bones are sometimes at the state inferren and tracked ,so for example the hand is being at the very unrelated ...
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86 views

Layers with parallax in a game with zoom out by a transformation matrix

I'm trying to implement a parallax rendering to my multi layered backgrounds. It's a classic 2d fighting game like The King of Fighters and Street Fighter. It may have a stage composed by 5 layers. ...
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41 views

C# XNA Weird black line behaviour of sprite animation spriteBatch.Draw()

So I've been making a Space Invaders game in XNA. I have my ship spritesheet (sprites are left-to-right - horizontal). The spritesheet has 6 sprites. Here's my class: playerShip.cs using System; ...
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52 views

XNA C# - Get original rotation from parent bone transform

I have a 3DS Max made model, exported into FBX and imported into XNA project. The parts I am working with have NOT been rotated in Max (specifically, collision mesh is made of Axiz-Aligned boxes). ...
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13 views

how to add .tif importer to skinned model pipeline

I have model which is occuring .tif components but XNA can not import .tif.Because of that I should add a .tif importer to my skinned model processor. How can ı add this? My SkinnedModelProcessor into ...
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53 views

How to move vertices of matrix in order to cast a 2d shadow?

I am trying to add shadows to my 2D xna game. Currently I have created a "shadow" using the texture of the caster with a transparent gray color, rotated, and stretched using a matrix. This, though, ...
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41 views

Concepts to store XNA textures

I'm working on a graphic library supporting XNA with some cool features. To do so I need direct per pixel access to textures (RGBA). I've been wondering what are the advantages of using those two ...
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46 views

Having trouble getting shader to work with sprite batch in XNA #4

I found a neat "CRT screen" effect shader on the web, but I've never used shaders before and I can't seem to get it working properly. If I do the second sprite batch in my code here normally without ...
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60 views

Data structure to store map layers in each Tile while keeping the order of terrain, items and monsters intact

My game represents its map as a 2D array of tiles, each of which stores a stack of layers. I'm looking for a data structure to efficiently represent this . I want to be able to add layers ...
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52 views

Drawing quadtree nodes

I'm using a quadtree example that I found on a tutorial. I have initialized the tree and using a breakpoint I am able to determine that there are 4 child nodes, each containing a number of items. So I ...
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44 views

HLSL - Binary operations

I'm trying to do binary operations with integers in the hlsl code. For example: int n = 10 & 15; Binary value of 10 = 1010 and Binary value of 15 = 1111. With this, n = 10, because (1010 & ...
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35 views

HLSL Shader Relative Positioning

I've got a shader that does the texturing, lighting, etc. for my game engine (written on top of MonoGame, in case that's relevant) for my block-terrain-based game (everything is rendered as triangles ...
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43 views

Speeding up Recursive Quad-Tree iteration

I've got a problem in regards of runtime speed in XNA. I've built up a Quad-Tree where each node stores the 3 positions of a triangle, which forms a Icosahedron and its subdivided triangles. My aim is ...
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86 views

2D Vector Graphics in XNA

I'm here today to ask about Vector graphics in XNA, my first question being whether it is possible or not. The only other question on here that I have seen in relation to this is simply asking which ...
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24 views

Wall Collision on a model

I am building a model of a house in XNA and made a collision system so that when the player goes into the wall they stop. Also I made it so if the player is pressing the key 'up' and collides into the ...
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27 views

XNA `tex2Dlod` always returns transparent black

I want to sample a texture in a vertex shader, so at first I just tried using float2 texcoords = ...; color = tex2D(texture, texcoords); But apparently I cannot use tex2D in a vertex shader, and ...
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99 views

graphics.IsFullScreen resetting to false after game constructor and graphics.ApplyChanges()

This is a MonoGame 3.2 Windows (DirectX) Project. I've tried setting graphics.IsFullScreen to true in the game's constructor and in the game's initialize function, both times running ...
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75 views

How can I create a 2D camera with zoom and parallax scrolling that works on every Windows Phone resolution?

Mario game that uses parallax scrolling: http://www.youtube.com/watch?v=de5f3mvRyIY I want to create a Windows Phone jump-and-run game with parallax scrolling. The parallax scrolling should be like ...
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70 views

Why isn't my Blender FBX not appearing in XNA?

I am trying to display a simple cube in XNA. The cube is the default Blender cube exported to a .fbx. Re-exporting the cube has had no effect. I have also varied the camera's z-distance from 5 to ...
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49 views

How to I coordinate a camera with the eyes of a model?

I am currently working on an FPS in XNA and I wanted to know how I would position the camera at the eyes of the model and whenever the model rotated or moved it's head (where the eyes are), the camera ...
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61 views

Particle friction with variable timestep in XNA

Alright, so I'm working on an engine of sorts in XNA (yes, it's deprecated, I know) and I'm implementing my own particle system. I've defined a "ParticleEffect" such that when it's supplied a GameTime ...
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41 views

Mouse RayCast quadTree in XNa

Hallo i have quadTree terain and every quadNode have BBox.I have made function to return center of hitted quadNode BBox. But it's returns my bad calculations..... I have pitchedYawRoll camera ,it's ...
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55 views

Pixel-Perfect Collision With Rotation

I know how to implement pixel perfect collision, but how would I do this with rotations applied to my sprite?
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30 views

Tiled and tmx files

i started using the software tiled and it very simple to create an image and object positions over there. I am using the library XNA and i would like to load the image and the objects into my code, ...
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46 views

Converting a WIndows Store App to Android

I cross posted this from SO I'm very new to Xamarin. I have a few published Windows Store apps and want to convert them to Android. I'm attempting to use Xamarin for this. I'm just using the free ...
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99 views

XNA - Finding boundaries in isometric tilemap

I have an issue with my 2D isometric engine. I'm using my own 2D camera class which works with matrices and need to find the tilemaps boundaries so the user always sees the map. Currently my map size ...
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52 views

XNA Guide text input - maximum length

so I am using Guide.BeginShowKeyboardInput to get the user to enter their username. I would like this to be limited to 20 characters, and it seems to break expected behaviour to let them input ...
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51 views

XNA Shader deformation event driven

I’m working on this tutorial trying to figure out how i can modify the code in order to get the deformation along only one axis (for example Z axis) when I hit a button on my keybord. In other words, ...
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55 views

XNA Windows Resolution / Mouse Position Bug

In XNA, when in windowed mode and resolution (set via PreferredBackBufferWidth/Height) is close to the resolution of the display, the view is distorted (zoomed in a bit)and the mouse coordinates are ...
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107 views

Zooming in isometric engine using XNA

I´m currently working on an isometric game engine and right now I´m looking for help concerning my zoom function. On my tilemap there are several objects, some of them are selectable. When a house ...
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63 views

Trying to get an object to move back and forth on collision between two collidable objects

Im trying to get a box object to hit a collidable wall on the right and when it hits it move left and hit the left wall and switch back and so on and so forth. Im having trouble with this because ...
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76 views

Rendering an Assimp Scene object in XNA without DirectX or OpenGL

Is there any site that explains how to render an imported Assimp Scene object in XNA/MonoGame using only the Frameworks available in those libraries? I realize that would be at the Vertex/Matrix level ...
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58 views

Animation of a 3D model's parts from code

I'm creating a game in XNA where will be an object called a tower. Its action can be described as two phases: aiming and firing. Here's a model I'm creating in Blender: I want the tower to have 3 ...
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37 views

XNA 2D Stencil Buffer Rotation

I am currently working on a 2d game related to planets and am trying to get a stencil buffer working with rotation. I currently have a stencil buffer found from another related answer but it refuses ...
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31 views

XNA - Link between Create Rotations matrices

A friend of mine have been coding some rotations on my XNA project, but the order of the matrices rotation are not good. Some are of form : Matrix.CreateRotationZ(1.21f) * ...
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48 views

How to import fbx into XNA?

I am developing basic XNA car game. I used 3D fbx car models to represent car objects. I drag and drop all tga and fbx files into content and I succesfully showed car in my game by using some basic ...
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28 views

How to use CCGrid3DActions in Cocos2d-XNA?

For example, I want to add a CCLiquid action to my player shield in my game. In my Player class: public Player() { // code snippet when creating new Player CCSprite shield = new ...
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84 views

Farseer: How can I break a body into multiple pieces?

I created a breakable body but the pieces are not flying around if the ball touches it. What is wrong? Why is the breakable body not breaking into pieces? I made a video and I enabled debugview, so ...
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31 views

How do I optimally give current UVs to the shader for animating a spritesheet?

I've implemented sprite animation by passing UVs into the shader with the good-ol' shader.SetParameters[] call. In the vertex shader, I lerp the new UVs with the Texture Coordinates of the original ...
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89 views

Precalculating timespan of bullet collision on cubic bezier curve circles?

I'm fairly new to game logics, C#/XNA (The language/library of choice) and bezier curves in general, and is stuck in my current project. I'm going to try to explain as thoroughly as I can what the ...
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80 views

Monogame/XNA Invert Screen Y Axis

I am trying to invert the direction of the Y axis in Monogame from positive downwards, or screen space, to positive upwards, so that my world transformation matrix makes more sense. It seems ...