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  • Java Slick2d - How to translate mouse coordinates to world coordinates

    - by Corey
    I am translating in my main class render. How do I get the mouse position where my mouse actually is after I scroll the screen public void render(GameContainer gc, Graphics g) throws SlickException { float centerX = 800/2; float centerY = 600/2; g.translate(centerX, centerY); g.translate(-player.playerX, -player.playerY); gen.render(g); player.render(g); } playerX = 800 /2 - sprite.getWidth(); playerY = 600 /2 - sprite.getHeight(); Image to help with explanation I tried implementing a camera but it seems no matter what I can't get the mouse position. I was told to do this worldX = mouseX + camX; but it didn't work the mouse was still off. Here is my Camera class if that helps: public class Camera { public float camX; public float camY; Player player; public void init() { player = new Player(); } public void update(GameContainer gc, int delta) { Input input = gc.getInput(); if(input.isKeyDown(Input.KEY_W)) { camY -= player.speed * delta; } if(input.isKeyDown(Input.KEY_S)) { camY += player.speed * delta; } if(input.isKeyDown(Input.KEY_A)) { camX -= player.speed * delta; } if(input.isKeyDown(Input.KEY_D)) { camX += player.speed * delta; } } Code used to convert mouse worldX = (int) (mouseX + cam.camX); worldY = (int) (mouseY + cam.camY);

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  • Algorithm for querying linearly through a non-linear list of questions

    - by JoshLeaves
    For a multiplayers trivia game, I need to supply my users with a new quizz in a desired subject (Science, Maths, Litt. and such) at the start of every game. I've generated about 5K quizzes for each subject and filled my database with them. So my 'Quizzes' database looks like this: |ID |Subject |Question +-----+------------+---------------------------------- | 23 |Science | What's water? | 42 |Maths | What's 2+2? | 99 |Litt. | Who wrote "Pride and Prejudice"? | 123 |Litt. | Who wrote "On The Road"? | 146 |Maths | What's 2*2? | 599 |Science | You know what's cool? |1042 |Maths | What's the Fibonacci Sequence? |1056 |Maths | What's 42? And so on... (Much more detailed/complex but I'll keep the exemple simple) As you can see, due to technical constraints (MongoDB), my IDs are not linear but I can use them as an increasing suite. So far, my algorithm to ensure two users get a new quizz when they play together is the following: // Take the last played quizzes by P1 and P2 var q_one = player_one.getLastPlayedQuizz('Maths'); var q_two = player_two.getLastPlayedQuizz('Maths'); // If both of them never played in the subject, return first quizz in the list if ((q_one == NULL) && (q_two == NULL)) return QuizzDB.findOne({subject: 'Maths'}); // If one of them never played, play the next quizz for the other player // This quizz is found by asking for the first quizz in the desired subject where // the ID is greater than the last played quizz's ID (if the last played quizz ID // is 42, this will return 146 following the above example database) if (q_one == NULL) return QuizzDB.findOne({subject: 'Maths', ID > q_two}); if (q_two == NULL) return QuizzDB.findOne({subject: 'Maths', ID > q_one}); // And if both of them have a lastPlayedQuizz, we return the next quizz for the // player whose lastPlayedQuizz got the higher ID if (q_one > q_two) return QuizzDB.findOne({subject: 'Maths', ID > q_one}); else return QuizzDB.findOne({subject: 'Maths', ID > q_two}); Now here comes the real problem: Once I get to the end of my database (let's say, P1's last played quizz in 'Maths' is 1056, P2's is 146 and P3 is 1042), following my algorithm, P1's ID is the highest so I ask for the next question in 'Maths' where ID is superior to 1056. There is nothing, so I roll back to the beginning of my quizz list (with a random skipper to avoid having the first question always show up). P1 and P2's last played will then be 42 and they will start fresh from the beginning of the list. However, if P1 (42) plays against P3 (1042), the resulting ID will be 1056...which P1 already played two games ago. Basically, players who just "rolled back" to the beginning of the list will be brought back to the end of the list by players who still haven't rolled back. The rollback WILL happen in the end, but it'll take time and there'll be a "bottleneck" at the beginning and at the end. Thus my question: What would be the best algorith to avoid this bottleneck and ensure players don't get stuck endlessly on the same quizzes? Also bear in mind that I've got some technical constraints: I can't get a random question in a subject (ie: no "QuizzDB.findOne({subject: 'Maths'}).skip(random());"). It's cool to skip on one to twenty records, but the MongoDB documentation warns against skipping too many documents. I would like to avoid building an array of every quizz played by each player and find the next non-played in the database with a $nin. Thanks for your help

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  • XNA `tex2Dlod` always returns transparent black

    - by feralin
    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 must use tex2Dlod. So then I changed the above code to color = tex2Dlod(texture, float4(texcoords, 0, 0)); But now color is always float4(0, 0, 0, 0) (i.e. transparent black). Why is this, and how can I fix it? EDIT: I know for a fact that the texture does not contain just transparent black pixels.

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  • iOS Game Center - Quit turn-based games for previous version of app

    - by rasmus
    I have a game on the iOS App Store that uses Game Center for turn-based multiplayer (GKTurnBasedMatch). I recently updated the app with a new game mode and I had to change the network protocol for that to happen. As a result I marked my new version as incompatible with the old one. That is, you cannot see the old games within the new app and you cannot initiate a game with someone with the old version of the app. This works as expected. However: The old games remain active after updating. There seems to be no way to quit them. What is worse is that they still count to the maximum number of games you can start. I have been contacted by players that can only start 1-3 games without hitting the roof. Have anyone experienced this before? Is there any way to quit the games? Thanks in advance

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  • Custom Content Pipeline with Automatic Serialization Load Error

    - by Direweasel
    I'm running into this error: Error loading "desert". Cannot find type TiledLib.MapContent, TiledLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null. at Microsoft.Xna.Framework.Content.ContentTypeReaderManager.InstantiateTypeReader(String readerTypeName, ContentReader contentReader, ContentTypeReader& reader) at Microsoft.Xna.Framework.Content.ContentTypeReaderManager.GetTypeReader(String readerTypeName, ContentReader contentReader, List1& newTypeReaders) at Microsoft.Xna.Framework.Content.ContentTypeReaderManager.ReadTypeManifest(Int32 typeCount, ContentReader contentReader) at Microsoft.Xna.Framework.Content.ContentReader.ReadHeader() at Microsoft.Xna.Framework.Content.ContentReader.ReadAsset[T]() at Microsoft.Xna.Framework.Content.ContentManager.ReadAsset[T](String assetName, Action1 recordDisposableObject) at Microsoft.Xna.Framework.Content.ContentManager.Load[T](String assetName) at TiledTest.Game1.LoadContent() in C:\My Documents\Dropbox\Visual Studio Projects\TiledTest\TiledTest\TiledTest\Game1.cs:line 51 at Microsoft.Xna.Framework.Game.Initialize() at TiledTest.Game1.Initialize() in C:\My Documents\Dropbox\Visual Studio Projects\TiledTest\TiledTest\TiledTest\Game1.cs:line 39 at Microsoft.Xna.Framework.Game.RunGame(Boolean useBlockingRun) at Microsoft.Xna.Framework.Game.Run() at TiledTest.Program.Main(String[] args) in C:\My Documents\Dropbox\Visual Studio Projects\TiledTest\TiledTest\TiledTest\Program.cs:line 15 When trying to run the game. This is a basic demo to try and utilize a separate project library called TiledLib. I have four projects overall: TiledLib (C# Class Library) TiledTest (Windows Game) TiledTestContent (Content) TMX CP Ext (Content Pipeline Extension Library) TiledLib contains MapContent which is throwing the error, however I believe this may just be a generic error with a deeper root problem. EMX CP Ext contains one file: MapProcessor.cs using System; using System.Collections.Generic; using System.Linq; using Microsoft.Xna.Framework; using Microsoft.Xna.Framework.Graphics; using Microsoft.Xna.Framework.Content.Pipeline; using Microsoft.Xna.Framework.Content.Pipeline.Graphics; using Microsoft.Xna.Framework.Content.Pipeline.Processors; using Microsoft.Xna.Framework.Content; using TiledLib; namespace TMX_CP_Ext { // Each tile has a texture, source rect, and sprite effects. [ContentSerializerRuntimeType("TiledTest.Tile, TiledTest")] public class DemoMapTileContent { public ExternalReference<Texture2DContent> Texture; public Rectangle SourceRectangle; public SpriteEffects SpriteEffects; } // For each layer, we store the size of the layer and the tiles. [ContentSerializerRuntimeType("TiledTest.Layer, TiledTest")] public class DemoMapLayerContent { public int Width; public int Height; public DemoMapTileContent[] Tiles; } // For the map itself, we just store the size, tile size, and a list of layers. [ContentSerializerRuntimeType("TiledTest.Map, TiledTest")] public class DemoMapContent { public int TileWidth; public int TileHeight; public List<DemoMapLayerContent> Layers = new List<DemoMapLayerContent>(); } [ContentProcessor(DisplayName = "TMX Processor - TiledLib")] public class MapProcessor : ContentProcessor<MapContent, DemoMapContent> { public override DemoMapContent Process(MapContent input, ContentProcessorContext context) { // build the textures TiledHelpers.BuildTileSetTextures(input, context); // generate source rectangles TiledHelpers.GenerateTileSourceRectangles(input); // now build our output, first by just copying over some data DemoMapContent output = new DemoMapContent { TileWidth = input.TileWidth, TileHeight = input.TileHeight }; // iterate all the layers of the input foreach (LayerContent layer in input.Layers) { // we only care about tile layers in our demo TileLayerContent tlc = layer as TileLayerContent; if (tlc != null) { // create the new layer DemoMapLayerContent outLayer = new DemoMapLayerContent { Width = tlc.Width, Height = tlc.Height, }; // we need to build up our tile list now outLayer.Tiles = new DemoMapTileContent[tlc.Data.Length]; for (int i = 0; i < tlc.Data.Length; i++) { // get the ID of the tile uint tileID = tlc.Data[i]; // use that to get the actual index as well as the SpriteEffects int tileIndex; SpriteEffects spriteEffects; TiledHelpers.DecodeTileID(tileID, out tileIndex, out spriteEffects); // figure out which tile set has this tile index in it and grab // the texture reference and source rectangle. ExternalReference<Texture2DContent> textureContent = null; Rectangle sourceRect = new Rectangle(); // iterate all the tile sets foreach (var tileSet in input.TileSets) { // if our tile index is in this set if (tileIndex - tileSet.FirstId < tileSet.Tiles.Count) { // store the texture content and source rectangle textureContent = tileSet.Texture; sourceRect = tileSet.Tiles[(int)(tileIndex - tileSet.FirstId)].Source; // and break out of the foreach loop break; } } // now insert the tile into our output outLayer.Tiles[i] = new DemoMapTileContent { Texture = textureContent, SourceRectangle = sourceRect, SpriteEffects = spriteEffects }; } // add the layer to our output output.Layers.Add(outLayer); } } // return the output object. because we have ContentSerializerRuntimeType attributes on our // objects, we don't need a ContentTypeWriter and can just use the automatic serialization. return output; } } } TiledLib contains a large amount of files including MapContent.cs using System; using System.Collections.Generic; using System.Globalization; using System.Xml; using Microsoft.Xna.Framework.Content.Pipeline; namespace TiledLib { public enum Orientation : byte { Orthogonal, Isometric, } public class MapContent { public string Filename; public string Directory; public string Version = string.Empty; public Orientation Orientation; public int Width; public int Height; public int TileWidth; public int TileHeight; public PropertyCollection Properties = new PropertyCollection(); public List<TileSetContent> TileSets = new List<TileSetContent>(); public List<LayerContent> Layers = new List<LayerContent>(); public MapContent(XmlDocument document, ContentImporterContext context) { XmlNode mapNode = document["map"]; Version = mapNode.Attributes["version"].Value; Orientation = (Orientation)Enum.Parse(typeof(Orientation), mapNode.Attributes["orientation"].Value, true); Width = int.Parse(mapNode.Attributes["width"].Value, CultureInfo.InvariantCulture); Height = int.Parse(mapNode.Attributes["height"].Value, CultureInfo.InvariantCulture); TileWidth = int.Parse(mapNode.Attributes["tilewidth"].Value, CultureInfo.InvariantCulture); TileHeight = int.Parse(mapNode.Attributes["tileheight"].Value, CultureInfo.InvariantCulture); XmlNode propertiesNode = document.SelectSingleNode("map/properties"); if (propertiesNode != null) { Properties = new PropertyCollection(propertiesNode, context); } foreach (XmlNode tileSet in document.SelectNodes("map/tileset")) { if (tileSet.Attributes["source"] != null) { TileSets.Add(new ExternalTileSetContent(tileSet, context)); } else { TileSets.Add(new TileSetContent(tileSet, context)); } } foreach (XmlNode layerNode in document.SelectNodes("map/layer|map/objectgroup")) { LayerContent layerContent; if (layerNode.Name == "layer") { layerContent = new TileLayerContent(layerNode, context); } else if (layerNode.Name == "objectgroup") { layerContent = new MapObjectLayerContent(layerNode, context); } else { throw new Exception("Unknown layer name: " + layerNode.Name); } // Layer names need to be unique for our lookup system, but Tiled // doesn't require unique names. string layerName = layerContent.Name; int duplicateCount = 2; // if a layer already has the same name... if (Layers.Find(l => l.Name == layerName) != null) { // figure out a layer name that does work do { layerName = string.Format("{0}{1}", layerContent.Name, duplicateCount); duplicateCount++; } while (Layers.Find(l => l.Name == layerName) != null); // log a warning for the user to see context.Logger.LogWarning(string.Empty, new ContentIdentity(), "Renaming layer \"{1}\" to \"{2}\" to make a unique name.", layerContent.Type, layerContent.Name, layerName); // save that name layerContent.Name = layerName; } Layers.Add(layerContent); } } } } I'm lost as to why this is failing. Thoughts? -- EDIT -- After playing with it a bit, I would think it has something to do with referencing the projects. I'm already referencing the TiledLib within my main windows project (TiledTest). However, this doesn't seem to make a difference. I can place the dll generated from the TiledLib project into the debug folder of TiledTest, and this causes it to generate a different error: Error loading "desert". Cannot find ContentTypeReader for Microsoft.Xna.Framework.Content.Pipeline.ExternalReference`1[Microsoft.Xna.Framework.Content.Pipeline.Graphics.Texture2DContent]. at Microsoft.Xna.Framework.Content.ContentTypeReaderManager.GetTypeReader(Type targetType, ContentReader contentReader) at Microsoft.Xna.Framework.Content.ContentTypeReaderManager.GetTypeReader(Type targetType) at Microsoft.Xna.Framework.Content.ReflectiveReaderMemberHelper..ctor(ContentTypeReaderManager manager, FieldInfo fieldInfo, PropertyInfo propertyInfo, Type memberType, Boolean canWrite) at Microsoft.Xna.Framework.Content.ReflectiveReaderMemberHelper.TryCreate(ContentTypeReaderManager manager, Type declaringType, FieldInfo fieldInfo) at Microsoft.Xna.Framework.Content.ReflectiveReader1.Initialize(ContentTypeReaderManager manager) at Microsoft.Xna.Framework.Content.ContentTypeReaderManager.ReadTypeManifest(Int32 typeCount, ContentReader contentReader) at Microsoft.Xna.Framework.Content.ContentReader.ReadHeader() at Microsoft.Xna.Framework.Content.ContentReader.ReadAsset[T]() at Microsoft.Xna.Framework.Content.ContentManager.ReadAsset[T](String assetName, Action1 recordDisposableObject) at Microsoft.Xna.Framework.Content.ContentManager.Load[T](String assetName) at TiledTest.Game1.LoadContent() in C:\My Documents\Dropbox\Visual Studio Projects\TiledTest\TiledTest\TiledTest\Game1.cs:line 51 at Microsoft.Xna.Framework.Game.Initialize() at TiledTest.Game1.Initialize() in C:\My Documents\Dropbox\Visual Studio Projects\TiledTest\TiledTest\TiledTest\Game1.cs:line 39 at Microsoft.Xna.Framework.Game.RunGame(Boolean useBlockingRun) at Microsoft.Xna.Framework.Game.Run() at TiledTest.Program.Main(String[] args) in C:\My Documents\Dropbox\Visual Studio Projects\TiledTest\TiledTest\TiledTest\Program.cs:line 15 This is all incredibly frustrating as the demo doesn't appear to have any special linking properties. The TiledLib I am utilizing is from Nick Gravelyn, and can be found here: https://bitbucket.org/nickgravelyn/tiledlib. The demo it comes with works fine, and yet in recreating I always run into this error.

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  • Performance of pixel shaders vs. SpriteBatch: XNA

    - by ashes999
    Precondition: I read this question/answer about using shaders, or spritebatch, to render and mark a sprite. I need to do something like that. I also have a 2D lighting PoC which I need to write. The way it will work will basically be something like: Draw all the sprites Draw lighting gradients to create a lighting texture Multiply/add the lighting texture to achieve different effects (I use multiple passes of add/multiply the lighting texture to achieve different effects.) My question is really about a generalization: can I say with certainty that pixel shaders are always faster than adding/multiplying textures to the SpriteBatch? Or that adding/multiplying is always faster? Or if it's not generalizable, how do I decide which approach to take, given that I can probably code either of them? (If it matters, I'm using MonoGame 3.0 beta for Windows games)

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  • Calculating Delta time , what is wrong?

    - by SteveL
    For 2 days now i am trying to calculate the correct delta time for my game , I am starting to getting crazy since i tried all the solutions that i found on the 5 first google pages... What is wrong? I cant get the correct delta time ,whatever i tried is just not working , the delta goes from 1 to 4 and then back 1 and then to 3 even if i take the averange delta between many frames.Plus the game runs way much faster(i mean the movement) on slow devices than in fast. The game runs on android so the spikes between frames are expected. My code is this: void Game::render() { timesincestart=getTimeMil(); _director->Render(); _director->Update(); float dif=(getTimeMil()-timesincestart);//usally its about 5 milliseconds lastcheck++; sumdelta+=dif; if(lastcheck>20) { sumdelta=sumdelta/20; delta=sumdelta; sumdelta=0; lastcheck=0; } LOGI("delta:%f",delta); }

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  • Comparison between Cocos2d and Corona

    - by dontangg
    I'm having a really hard time deciding which way to go on this. I'm about to start developing a game and I haven't been able to find many good comparisons between these approaches. I don't have many requirements for the game yet, but here is what I do know. needs to work on iPhone I don't have much money ($400 for Unity for iPhone is probably too much. I can probably afford $99 for Corona.) Graphics will be 2D Physics support is not needed Ability to use particles would be nice Game Center support would be nice (Corona is planning to support it soon) It would be nice to be able to support Android as well if it isn't much effort. I have done my own research, so I know basic things about them. I know Corona uses Lua and Cocos2D uses Objective C. I know that Corona allows deployment to iPhone and Android, but how easy is it? Cocos2D is free, but so many people talk about how easy it is to use Corona, but I don't like being restricted to features Corona supports or the price tag. I feel so torn here.

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  • formula for replicating glTexGen in opengl es 2.0 glsl

    - by visualjc
    I also posted this on the main StackExchange, but this seems like a better place, but for give me for the double post if it shows up twice. I have been trying for several hours to implement a GLSL replacement for glTexGen with GL_OBJECT_LINEAR. For OpenGL ES 2.0. In Ogl GLSL there is the gl_TextureMatrix that makes this easier, but thats not available on OpenGL ES 2.0 / OpenGL ES Shader Language 1.0 Several sites have mentioned that this should be "easy" to do in a GLSL vert shader. But I just can not get it to work. My hunch is that I'm not setting the planes up correctly, or I'm missing something in my understanding. I've pored over the web. But most sites are talking about projected textures, I'm just looking to create UV's based on planar projection. The models are being built in Maya, have 50k polygons and the modeler is using planer mapping, but Maya will not export the UV's. So I'm trying to figure this out. I've looked at the glTexGen manpage information: g = p1xo + p2yo + p3zo + p4wo What is g? Is g the value of s in the texture2d call? I've looked at the site: http://www.opengl.org/wiki/Mathematics_of_glTexGen Another size explains the same function: coord = P1*X + P2*Y + P3*Z + P4*W I don't get how coord (an UV vec2 in my mind) is equal to the dot product (a scalar value)? Same problem I had before with "g". What do I set the plane to be? In my opengl c++ 3.0 code, I set it to [0, 0, 1, 0] (basically unit z) and glTexGen works great. I'm still missing something. My vert shader looks basically like this: WVPMatrix = World View Project Matrix. POSITION is the model vertex position. varying vec4 kOutBaseTCoord; void main() { gl_Position = WVPMatrix * vec4(POSITION, 1.0); vec4 sPlane = vec4(1.0, 0.0, 0.0, 0.0); vec4 tPlane = vec4(0.0, 1.0, 0.0, 0.0); vec4 rPlane = vec4(0.0, 0.0, 0.0, 0.0); vec4 qPlane = vec4(0.0, 0.0, 0.0, 0.0); kOutBaseTCoord.s = dot(vec4(POSITION, 1.0), sPlane); kOutBaseTCoord.t = dot(vec4(POSITION, 1.0), tPlane); //kOutBaseTCoord.r = dot(vec4(POSITION, 1.0), rPlane); //kOutBaseTCoord.q = dot(vec4(POSITION, 1.0), qPlane); } The frag shader precision mediump float; uniform sampler2D BaseSampler; varying mediump vec4 kOutBaseTCoord; void main() { //gl_FragColor = vec4(kOutBaseTCoord.st, 0.0, 1.0); gl_FragColor = texture2D(BaseSampler, kOutBaseTCoord.st); } I've tried texture2DProj in frag shader Here are some of the other links I've looked up http://www.gamedev.net/topic/407961-texgen-not-working-with-glsl-with-fixed-pipeline-is-ok/ Thank you in advance.

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  • Understanding DeviceContext and Shaders in Direct3D/SlimDX

    - by Carson Myers
    I've been working through this tutorial about drawing triangles with SlimDX, and while it works, I've been trying to structure my program differently than in the tutorial. The tutorial just has everything in the main method, I'm trying to separate components into their own classes. But I'm not sure where certain components belong: namely, contexts and shaders. The tutorial (as it's just rendering one triangle) has one device, one swapchain, one device context and one set of shaders. intuition says that there is only one device/swapchain for one game, but with contexts I don't know. I made a Triangle class and put the vertex stuff in there. Should it also create a context? Should it load its own shaders? Or should I pass some global context and shaders to the triangle class when it is constructed? Or pass the shaders and construct a new context? I'm just getting started with 3D programming, so in addition to answering this question, if anyone knows of a tutorial or article or something about the larger-scale structure of a game, I'd be interested in seeing that as well.

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  • Jumping Vs. Gravity

    - by PhaDaPhunk
    Hi i'm working on my first XNA 2D game and I have a little problem. If I jump, my sprite jumps but does not fall down. And I also have another problem, the user can hold spacebar to jump as high as he wants and I don't know how to keep him from doing that. Here's my code: The Jump : if (FaKeyboard.IsKeyDown(Keys.Space)) { Jumping = true; xPosition -= new Vector2(0, 5); } if (xPosition.Y >= 10) { Jumping = false; Grounded = false; } The really simple basic Gravity: if (!Grounded && !Jumping) { xPosition += new Vector2(1, 3) * speed; } Here's where's the grounded is set to True or False with a Collision Rectangle MegamanRectangle = new Rectangle((int)xPosition.X, (int)xPosition.Y, FrameSizeDraw.X, FrameSizeDraw.Y); Rectangle Block1Rectangle = new Rectangle((int)0, (int)73, Block1.Width, Block1.Height); Rectangle Block2Rectangle = new Rectangle((int)500, (int)73, Block2.Width, Block2.Height); if ((MegamanRectangle.Intersects(Block1Rectangle) || (MegamanRectangle.Intersects(Block2Rectangle)))) { Grounded = true; } else { Grounded = false; } The grounded bool and The gravity have been tested and are working. Any ideas why? Thanks in advance and don't hesitate to ask if you need another Part of the Code.

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  • using Unity Android In a sub view and add actionbar and style

    - by aeroxr1
    I exported a simple animation from Unity3D (version 4.5) in android project. With eclipse I modified the manifest and added another activity. In this activity I put a button that it makes start the animation,and this is the result. The action bar appear in the main activity but it doesn't in the unity's activity :( How can I add the action bar and the style of the first activity to unity's animation activity ? This is the unity's activity's code : package com.rabidgremlin.tut.redcube; import android.app.NativeActivity; import android.content.res.Configuration; import android.graphics.PixelFormat; import android.os.Bundle; import android.view.KeyEvent; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.view.Window; import android.view.WindowManager; import com.unity3d.player.UnityPlayer; public class UnityPlayerNativeActivity extends NativeActivity { protected UnityPlayer mUnityPlayer; // don't change the name of this variable; referenced from native code // Setup activity layout @Override protected void onCreate (Bundle savedInstanceState) { //requestWindowFeature(Window.FEATURE_NO_TITLE); super.onCreate(savedInstanceState); getWindow().takeSurface(null); //setTheme(android.R.style.Theme_NoTitleBar_Fullscreen); getWindow().setFormat(PixelFormat.RGB_565); mUnityPlayer = new UnityPlayer(this); /*if (mUnityPlayer.getSettings ().getBoolean ("hide_status_bar", true)) getWindow ().setFlags (WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); */ setContentView(mUnityPlayer); mUnityPlayer.requestFocus(); } // Quit Unity @Override protected void onDestroy () { mUnityPlayer.quit(); super.onDestroy(); } // Pause Unity @Override protected void onPause() { super.onPause(); mUnityPlayer.pause(); } // eliminiamo questa onResume() e proviamo a modificare la onResume() // Resume Unity @Override protected void onResume() { super.onResume(); mUnityPlayer.resume(); } // inseriamo qualche modifica qui // This ensures the layout will be correct. @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); mUnityPlayer.configurationChanged(newConfig); } // Notify Unity of the focus change. @Override public void onWindowFocusChanged(boolean hasFocus) { super.onWindowFocusChanged(hasFocus); mUnityPlayer.windowFocusChanged(hasFocus); } // For some reason the multiple keyevent type is not supported by the ndk. // Force event injection by overriding dispatchKeyEvent(). @Override public boolean dispatchKeyEvent(KeyEvent event) { if (event.getAction() == KeyEvent.ACTION_MULTIPLE) return mUnityPlayer.injectEvent(event); return super.dispatchKeyEvent(event); } // Pass any events not handled by (unfocused) views straight to UnityPlayer @Override public boolean onKeyUp(int keyCode, KeyEvent event) { return mUnityPlayer.injectEvent(event); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { return mUnityPlayer.injectEvent(event); } @Override public boolean onTouchEvent(MotionEvent event) { return mUnityPlayer.injectEvent(event); } /*API12*/ public boolean onGenericMotionEvent(MotionEvent event) { return mUnityPlayer.injectEvent(event); } } And this is the AndroidManifest.xml android:versionCode="1" android:versionName="1.0" > <!-- android:theme="@android:style/Theme.NoTitleBar"--> <supports-screens android:anyDensity="true" android:largeScreens="true" android:normalScreens="true" android:smallScreens="true" android:xlargeScreens="true" /> <application android:icon="@drawable/app_icon" android:label="@string/app_name" android:theme="@android:style/Theme.Holo.Light" > <activity android:name="com.rabidgremlin.tut.redcube.UnityPlayerNativeActivity" android:configChanges="mcc|mnc|locale|touchscreen|keyboard|keyboardHidden|navigation|orientation|screenLayout|uiMode|screenSize|smallestScreenSize|fontScale" android:label="@string/app_name" android:screenOrientation="portrait" > <!--android:launchMode="singleTask"--> <meta-data android:name="unityplayer.UnityActivity" android:value="true" /> <meta-data android:name="unityplayer.ForwardNativeEventsToDalvik" android:value="false" /> </activity> <activity android:name="com.rabidgremlin.tut.redcube.MainActivity" android:label="@string/title_activity_main" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> <uses-sdk android:minSdkVersion="17" android:targetSdkVersion="19" /> <uses-feature android:glEsVersion="0x00020000" /> </manifest>

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  • How to do the Geometry Wars gravity well effect

    - by Mykel Stone
    I'm not talking about the background grid here, I'm talking about the swirly particles going around the Gravity Wells! I've always liked the effect and decided it'd be a fun experiment to replicate it, I know GW uses Hooke's law all over the place, but I don't think the Particle-to-Well effect is done using springs, it looks like a distance-squared function. Here is a video demonstrating the effect: http://www.youtube.com/watch?v=YgJe0YI18Fg I can implement a spring or gravity effect on some particles just fine, that's easy. But I can't seem to get the effect to look similar to GWs effect. When I watch the effect in game it seems that the particles are emitted in bunches from the Well itself, they spiral outward around the center of the well, and eventually get flung outward, fall back towards the well, and repeat. How does he make the particles spiral outward when spawned? How does he keep the particle bunches together when near the Well but spread away from each other when they're flung outward? How does he keep the particles so strongly attached to the Well?

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  • Scene Graph for Deferred Rendering Engine

    - by Roy T.
    As a learning exercise I've written a deferred rendering engine. Now I'd like to add a scene graph to this engine but I'm a bit puzzled how to do this. On a normal (forward rendering engine) I would just add all items (All implementing IDrawable and IUpdateAble) to my scene graph, than travel the scene-graph breadth first and call Draw() everywhere. However in a deferred rendering engine I have to separate draw calls. First I have to draw the geometry, then the shadow casters and then the lights (all to different render targets), before I combine them all. So in this case I can't just travel over the scene graph and just call draw. The way I see it I either have to travel over the entire scene graph 3 times, checking what kind of object it is that has to be drawn, or I have to create 3 separate scene graphs that are somehow connected to each other. Both of these seem poor solutions, I'd like to handle scene objects more transparent. One other solution I've thought of was traveling trough the scene graph as normal and adding items to 3 separate lists, separating geometry, shadow casters and lights, and then iterating these lists to draw the correct stuff, is this better, and is it wise to repopulate 3 lists every frame?

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  • 2D animation example in pyglet (python) looping through 2 images/sprites every x seconds

    - by Bentley4
    Suppose you have two images: step1.png and step2.png . Can anyone show me a very simple example in pyglet how to loop through those 2 images say every 0.5 seconds? The character doesn't have to move, just a simple black screen with a fixed region wherein the two images continually change every 0.5 secs. I know how to make a character move, shoot projectiles etc. but I just can't figure out how to control the looping speed of the images.

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  • javascript game loop and game update design

    - by zuo
    There is a main game loop in my program, which calls game update every frame. However, to make better animation and better control, there is a need to implement a function like updateEveryNFrames(n, func). I am considering implementing a counter for each update. The counter will be added by one each frame. The update function will be invoked according to the counter % n. For example, in a sequence of sprites animation, I can use the above function to control the speed of the animation. Can some give some advice or other solutions?

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  • Developing for iOS on Linux

    - by Jay
    I am looking for an engine or library to develop a game for iOS on Linux. High level, low level, GUI, no GUI, does not matter too much. I am really looking for anything. I'm not actually talking about deploying to iOS from Linux or anything like. I just want to do the bulk of the work on Linux, with minimal changes required to run it on iOS. Edit: YES, I do have access to a Mac, but it is limited. So I want to be able to work on the project on my regular Ubuntu box. Also, I am in the paid developer program, so I can deploy to iOS devices from the Mac.

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  • Game based on Ajax polling for 12 players

    - by Azincourt
    I am planning on writing a small browser game. The webserver is a shared server, with no root / install possible. I want to use AJAX for client/server communication. There will be 12 players. So each player would be polling the server for the current game status every X milliseconds (let's say 200ms). So that would be 200ms x 12 players x 5 = 60 requests per second Can Apache handle those requests? What might be the bottlenecks when using this attempt?

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  • how should I network my turn based game?

    - by ddriver1
    I'm writing a very basic turn based strategy game which allows a player to select units and attack enemy units on their turn. The game is written in Java using the slick2d library and I plan to use kyronet for the networking api. I want the game to be networked, but I do not know how I should go about it. My current idea is to connect two users together, and the first one to join the game becomes the game host, while the other becomes the client. However after reading http://gafferongames.com/networking-for-game-programmers/what-every-programmer-needs-to-know-about-game-networking/ it seems my game would be suited to a peer to peer lockstep model. Would that make programming the networking side much easier? Any suggestions on how I should structure my networking would be greatly appreciated

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  • Camera rotation - First Person Camera using GLM

    - by tempvar
    I've just switched from deprecated opengl functions to using shaders and GLM math library and i'm having a few problems setting up my camera rotations (first person camera). I'll show what i've got setup so far. I'm setting up my ViewMatrix using the glm::lookAt function which takes an eye position, target and up vector // arbitrary pos and target values pos = glm::vec3(0.0f, 0.0f, 10.0f); target = glm::vec3(0.0f, 0.0f, 0.0f); up = glm::vec3(0.0f, 1.0f, 0.0f); m_view = glm::lookAt(pos, target, up); i'm using glm::perspective for my projection and the model matrix is just identity m_projection = glm::perspective(m_fov, m_aspectRatio, m_near, m_far); model = glm::mat4(1.0); I send the MVP matrix to my shader to multiply the vertex position glm::mat4 MVP = camera->getProjection() * camera->getView() * model; // in shader gl_Position = MVP * vec4(vertexPos, 1.0); My camera class has standard rotate and translate functions which call glm::rotate and glm::translate respectively void camera::rotate(float amount, glm::vec3 axis) { m_view = glm::rotate(m_view, amount, axis); } void camera::translate(glm::vec3 dir) { m_view = glm::translate(m_view, dir); } and i usually just use the mouse delta position as the amount for rotation Now normally in my previous opengl applications i'd just setup the yaw and pitch angles and have a sin and cos to change the direction vector using (gluLookAt) but i'd like to be able to do this using GLM and matrices. So at the moment i have my camera set 10 units away from the origin facing that direction. I can see my geometry fine, it renders perfectly. When i use my rotation function... camera->rotate(mouseDeltaX, glm::vec3(0, 1, 0)); What i want is for me to look to the right and left (like i would with manipulating the lookAt vector with gluLookAt) but what's happening is It just rotates the model i'm looking at around the origin, like im just doing a full circle around it. Because i've translated my view matrix, shouldn't i need to translate it to the centre, do the rotation then translate back away for it to be rotating around the origin? Also, i've tried using the rotate function around the x axis to get pitch working, but as soon as i rotate the model about 90 degrees, it starts to roll instead of pitch (gimbal lock?). Thanks for your help guys, and if i've not explained it well, basically i'm trying to get a first person camera working with matrix multiplication and rotating my view matrix is just rotating the model around the origin.

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  • Sprite sheet generator

    - by Andrea Tucci
    I need to generate a sprite sheet with squared sprite for a 2D game. How can I generate a sprite sheet where each frame has x = y? The only think I have to do is to "insert" some blank space between sprites (in case y were x in the original sprite). Is there any program that I can use to trasform "irregular" sprite sheets to "squared" sprite sheets? An example of non-squared sprite sheet: http://spriters-resource.com/gameboy_advance/khcom/sheet/1138

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  • Triangle Line-Segment Intersection - detecting near misses

    - by Will
    A ray is a very poor approximation of a player! I think approximating a player with a sphere traveling a straight line each game tick will solve my problems of the player intersecting edges of scenery because their line segment missed it yet their own model is not infinitely thin... I have a 3D triangle and a line segment. I have the normal triangle-line-segment intersection code which I admit I have only a woolly grasp of. To model movement and compute collisions of the player I have to determine if a line passes within sphere-radius of a triangle. But I can find no convenient line near-miss intersection code! Here's the classic triangle intersection ### commented ### code with my starting assumptions: function triangle_ray_intersection(a,b,c,ray_origin,ray_dir,ray_radius) { // http://softsurfer.com/Archive/algorithm_0105/algorithm_0105.htm#intersect_RayTriangle%28%29 // get triangle edge vectors and plane normal var u = vec3_sub(b,a); var v = vec3_sub(c,a); var n = vec3_cross(u,v); if(n[0]==0 && n[1]==0 && n[2]==0) return null; // triangle is degenerate var w0 = vec3_sub(ray_origin,a); var j = vec3_dot(n,ray_dir); if(Math.abs(j) < 0.00000001) { //### if parallel, might still pass within ray_radius of it return null; // parallel, disjoint or on plane } var i = -vec3_dot(n,w0); // get intersect point of ray with triangle plane var k = i / j; if(k < 0.0) return null; // ray goes away from triangle //### as its a line segment, k > 1+ray_radius means no intersect var hit = vec3_add(ray_origin,vec3_scale(ray_dir,k)); // intersect point of ray and plane // is I inside T? //### here I'm a bit lost; this is presumably computing barycentric coordinates? var uu = vec3_dot(u,u); var uv = vec3_dot(u,v); var vv = vec3_dot(v,v); var w = vec3_sub(hit,a); var wu = vec3_dot(w,u); var wv = vec3_dot(w,v); var D = uv * uv - uu * vv; var s = (uv * wv - vv * wu) / D; //### therefore, compute if its within ray_radius scaled to the 0..1 of barycentric coordinates? if(s<0.0 || s>1.0) return null; // I is outside T var t = (uv * wu - uu * wv) / D; if(t<0.0 || (s+t)>1.0) return null; // I is outside T //### finally, if it passses a barycentric test it might still be too far //### to a point; must check that its distance from a corner is within ray_radius too if more than one barycentric coord is >1 //### so we have rounded corners... return [hit,n]; // I is in T } Given the distance between the point of plane intersection and each corner, I ought to be able to determine distance at world scale of how far beyond the edge - beyond 1.0 in barycentric coordinates for each axis - that point is... At this point my head explodes! Is this the right track? What's the actual code? UPDATE: you can earn 100 pts on SO if you answer this question there...! How can you determine if a line segment passes within some distance of a triangle?

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  • How to get the path of a file after publishing my game

    - by NDraskovic
    I made a "game" for a college project that reads data from .txt file at startup and draws some models according to the data in that file. This is the code I use using (StreamReader sr = new StreamReader(@"C:\Users\User\Desktop\Linije.txt")) { String linija; while ((linija = sr.ReadLine()) != null) { red = linija.Split(','); model = red[0]; x = red[1]; y = red[2]; z = red[3]; elementi.Add(Convert.ToInt32(model)); podatci.Add(new Vector3(Convert.ToSingle(x),Convert.ToSingle(y),Convert.ToSingle(z))); } } As you see, this code fills some variables that are then used to define the model that will be drawn and the coordinates where it will be drawn. The problem that I'm having is that I don't know how to distribute that file to other computers (obviously on another computer it would have another path)? Do you have some advices on how to do this? P.S I tried to put it in the Content and set the Build Action on None, and I can see the file in the content directory, but when I change it, nothing happens (the models don't change as they should)

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  • BoundingBox created from mesh to origin, making it bigger

    - by Gunnar Södergren
    I'm working on a level-based survival game and I want to design my scenes in Maya and export them as a single model (with multiple meshes) into XNA. My problem is that when I try to create Bounding Boxes(for Collision purposes) for each of the meshes, the are calculated from origin to the far-end of the current mesh, so to speak. I'm thinking that it might have something to do with the position each mesh brings from Maya and that it's interpreted wrongly... or something. Here's the code for when I create the boxes: private static BoundingBox CreateBoundingBox(Model model, ModelMesh mesh) { Matrix[] boneTransforms = new Matrix[model.Bones.Count]; model.CopyAbsoluteBoneTransformsTo(boneTransforms); BoundingBox result = new BoundingBox(); foreach (ModelMeshPart meshPart in mesh.MeshParts) { BoundingBox? meshPartBoundingBox = GetBoundingBox(meshPart, boneTransforms[mesh.ParentBone.Index]); if (meshPartBoundingBox != null) result = BoundingBox.CreateMerged(result, meshPartBoundingBox.Value); } result = new BoundingBox(result.Min, result.Max); return result; } private static BoundingBox? GetBoundingBox(ModelMeshPart meshPart, Matrix transform) { if (meshPart.VertexBuffer == null) return null; Vector3[] positions = VertexElementExtractor.GetVertexElement(meshPart, VertexElementUsage.Position); if (positions == null) return null; Vector3[] transformedPositions = new Vector3[positions.Length]; Vector3.Transform(positions, ref transform, transformedPositions); for (int i = 0; i < transformedPositions.Length; i++) { Console.WriteLine(" " + transformedPositions[i]); } return BoundingBox.CreateFromPoints(transformedPositions); } public static class VertexElementExtractor { public static Vector3[] GetVertexElement(ModelMeshPart meshPart, VertexElementUsage usage) { VertexDeclaration vd = meshPart.VertexBuffer.VertexDeclaration; VertexElement[] elements = vd.GetVertexElements(); Func<VertexElement, bool> elementPredicate = ve => ve.VertexElementUsage == usage && ve.VertexElementFormat == VertexElementFormat.Vector3; if (!elements.Any(elementPredicate)) return null; VertexElement element = elements.First(elementPredicate); Vector3[] vertexData = new Vector3[meshPart.NumVertices]; meshPart.VertexBuffer.GetData((meshPart.VertexOffset * vd.VertexStride) + element.Offset, vertexData, 0, vertexData.Length, vd.VertexStride); return vertexData; } } Here's a link to the picture of the mesh(The model holds six meshes, but I'm only rendering one and it's bounding box to make it clearer: http://www.gsodergren.se/portfolio/wp-content/uploads/2011/10/Screen-shot-2011-10-24-at-1.16.37-AM.png The mesh that I'm refering to is the Cubelike one. The cylinder is a completely different model and not part of any bounding box calculation. I've double- (and tripple-)-checked that this mesh corresponds to this bounding box. Any thoughts on what I'm doing wrong?

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  • java slick2D - problem using ScalableGame class

    - by nellykvist
    I have problem adjusting the size of the screen, using the ScalableGame class from Slick2D library. So, what I want to achieve, whenever I change display size, background should adjust to screen size, and objects (images, grahpic shapes) should fit (scale). Alright, so this is how state looks by default. I can change screen size, but images and graphic shapes does not appGameContainer = new AppGameContainer(     new ScalableGame(new AppStateController(), Settings.video.getWidth(), Settings.video.getHeight(), true) ); appGameContainer.setDisplayMode(Settings.video.getWidth(), Settings.video.getHeight(), Settings.video.isFullScreen()); appGameContainer.start(); If I assign to width/height +100, ScalableGame constructor: appGameContainer = new AppGameContainer(     new ScalableGame(new AppStateController(), Settings.video.getWidth() + 100, Settings.video.getHeight() + 100, true) ); appGameContainer.setDisplayMode(Settings.video.getWidth(), Settings.video.getHeight(), Settings.video.isFullScreen()); appGameContainer.start(); If I assign to width/height +100, to display: appGameContainer = new AppGameContainer(     new ScalableGame(new AppStateController(), Settings.video.getWidth(), Settings.video.getHeight(), true) ); appGameContainer.setDisplayMode(Settings.video.getWidth() + 100, Settings.video.getHeight() + 100, Settings.video.isFullScreen()); appGameContainer.start();

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