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• How can one compile Darwinia under Linux?

  - by Tobias Kienzler

  Introversion is now offering the Darwinia+Multiwinia source for sale, stating Note: You will need Windows and Visual Studio 2008 to build the games. We have tested that the code compiles correctly on the PC, but you will need to put some effort in to compile for Mac / Linux. There is no Xbox code in this release. Has anyone put this effort in already? The best answer would (be yes and) mention modifications that had to be done (also mentioning the distribution used), the second-to-best would explain why it doesn't work right now. Since I haven't bought the source pack I'm relying on up-votes as confirmation, so please comment on answers if something doesn't work or has to be modified e.g. for another Linux distribution. I'm currently using Ubuntu 8.04, but 10.04 or e.g. Gentoo would be a choice, too. EDIT: Clarification: The intention is to make a new game with that engine, but since this question is a prerequisite, it seems suitable here. UPDATE It is a bit off topic, but for those interested, Introversion added the source code of Uplink, Darwinia, Multiwinia and DEFCON to The Humble Introversion Bundle, so don't miss it!

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• Isometric displaying two different images in different positions

  - by Canvas

  I'm creating a simple Isometric game using HTML5 and Javascript, but I can't seem to get the display to work, at the moment i have 9 tiles that have X and Y positions and the player has a X and Y position, the players X and Y properties are set to 100, and the tiles are as shown tiles[0] = new Array(3); tiles[1] = new Array(3); tiles[2] = new Array(3); tiles[0][0] = new point2D( 100, 100); tiles[0][1] = new point2D( 160, 100); tiles[0][2] = new point2D( 220, 100); tiles[1][0] = new point2D( 100, 160); tiles[1][1] = new point2D( 160, 160); tiles[1][2] = new point2D( 220, 160); tiles[2][0] = new point2D( 100, 220); tiles[2][1] = new point2D( 160, 220); tiles[2][2] = new point2D( 220, 220); Now I use this method to work out the isometric position function twoDToIso( point ) { var cords = point2D; cords.x = point.x - point.y; cords.y = (point.x + point.y) / 2; return cords; } point2D is function point2D( x, y) { this.x = x; this.y = y; } Now this i'm sure does work out the correct positioning, but here is the output Isometric view I just need to move my player position a tiny bit, but is that the best way to display my player position in the right position? Canvas P.S. the tile width is 120 and height is 60 and the player is width 30 by height 15

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• How to implement curved movement while tracking the appropriate angle?

  - by Vexille

  I'm currently coding a 2D top-down car game which will be turn-based. And since it's turn-based, the cars won't be controlled directly (i.e. with a simple velocity vector that adjusts its angle when the player wants to turn), but instead it's movement path has to be planned beforehand, and then the car needs to follow the path when the turn ends (think Steambirds). This question has some interesting information, but its focus is on homing-missile behaviour, which I kinda had figured out, but doesn't really apply to my case, I think, since I need to show a preview of the path when the player is planning his turn, then have the car follow that path. In that same question, there's an excellent answer by Andrew Russel which mentions Equations of Motion and Bézier's Curve. Some of his other suggestions of implementation are specific to XNA though, so they don't help much (I'm using Marmalade SDK). If I assume Bézier's Curve as the solution of choice, I'm left with one specific problem: I'll have the car's position (the first endpoint) and the target/final position (the last endpoint), but what should I use as the control point (assuming a square/quadratic curve)? And whether I use Bézier's Curve or another parametric equation, I'd still be left with another issue: the car can't just follow the curve, it must turn (i.e. adjust its angle) accordingly. So how can I figure out which way the car should be pointing to at any given point in the curve?

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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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• Stage3D Camera problem

  - by Thomas Versteeg

  I am trying to create a 2D Stage3D game where you can move the camera around the level in an RTS style. I thought about using Orthographic Matrix3D functions for this but when I try to scroll the whole "stage" also scrolls. This is the Camera code: public function Camera2D(width:int, height:int, zoom:Number = 1) { resize(width, height); _zoom = zoom; } public function resize(width:Number, height:Number):void { _width = width; _height = height; _projectionMatrix = makeMatrix(0, width, 0, height); _recalculate = true; } protected function makeMatrix(left:Number, right:Number, top:Number, bottom:Number, zNear:Number = 0, zFar:Number = 1):Matrix3D { return new Matrix3D(Vector.<Number>([ 2 / (right - left), 0, 0, 0, 0, 2 / (top - bottom), 0, 0, 0, 0, 1 / (zFar - zNear), 0, 0, 0, zNear / (zNear - zFar), 1 ])); } public function get viewMatrix():Matrix3D { if (_recalculate) { _recalculate = false; _viewMatrix.identity(); _viewMatrix.appendTranslation( -_width / 2 - _x, -_height / 2 - y, 0); _viewMatrix.appendScale(_zoom, _zoom, 1); _renderMatrix.identity(); _renderMatrix.append(_viewMatrix); _renderMatrix.append(_projectionMatrix); } return _renderMatrix; } Here are two screenshots to show what I mean: How do I only let the inside of the stage3D scroll and not the whole stage?

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• How can I resize a set of sprite images?

  - by Tyler J Fisher

  Hey StackExchange GameDev community, I'm attempting to resize series of sprites upon instantiation of the class they're located in. I've attempted to use the following code to resize the images, however my attempts have been unsuccessful. I have been unable to write an implementation that is even compilable, so no error codes yet. wLeft.getScaledInstance(wLeft.getWidth()*2, wLeft.getHeight()*2, Image.SCALE_FAST); I've heard that Graphics2D is the best option. Any suggestions? I think I'm probably best off loading the images into a Java project, resizing the images then outputting them to a new directory so as not to have to resize each sprite upon class instantiation. What do you think? Photoshopping each individual sprite is out of the question, unless I used a macro. Code: package game; //Import import java.awt.Image; import javax.swing.ImageIcon; public class Mario extends Human { Image wLeft = new ImageIcon("sprites\\mario\\wLeft.PNG").getImage(); //Constructor public Mario(){ super("Mario", 50); wLeft = wLeft.getScaledInstance(wLeft.getWidth()*2, wLeft.getHeight()*2, Image.SCALE_FAST); }

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• LibGDX Boid Seek Behaviour

  - by childonline

  I'm trying to make a swarm of boids which seek out the mouse position and move towards it, but I'm having a bit of a problem. The boids just seem to want to go to upper-right corner of the game window. The mouse position seems influence the behavior a bit, but not enough to make the boid turn towards it. I suspect there is a problem with the way LibGDX handles its coordinate system, but I'm not sure how to fix it I've uploaded the eclipse project here! Also here are the relevant bits of my code, in case you see something obviously wrong: public Agent(){ _texture = GdxGame.TEX_AGENT; TextureRegion region = new TextureRegion(_texture, 0, 0, 32, 32); TextureRegion region2 = new TextureRegion(GdxGame.TEX_TARGET, 0, 0, 32, 32); _sprite = new Sprite(region); _sprite.setSize(.05f, .05f); _sprite_target = new Sprite(region2); _sprite_target.setSize(.1f, .1f); _max_velocity = 0.05f; _max_speed = 0.005f; _velocity = new Vector2(0, 0); _desired_velocity = new Vector2(0, 0); _steering = new Vector2(0, 0); _position = new Vector2(-_sprite.getWidth()/2, -_sprite.getHeight()/2); _mass = 10f; } public void Update(float deltaTime){ _target = new Vector2(Gdx.input.getX(), Gdx.input.getY()); _desired_velocity = ((_target.sub(_position)).nor()).scl(_max_velocity,_max_velocity); _steering = ((_desired_velocity.sub(_velocity)).limit(_max_speed)).div(_mass); _velocity = (_velocity.add(_steering)).limit(_max_speed); _position = _position.add(_velocity); _sprite.setPosition(_position.x, _position.y); _sprite_target.setPosition(Gdx.input.getX(), Gdx.input.getY()); } I've used this tutorial here. Thanks!

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• Ambiguation between multitouch geistures tap and free drag in Windows Phone 8 Emulator (Monogame)

  - by Moses Aprico

  I am making a 2d tile based tactic game. I want the map to be slided around (because it's bigger than the screen) with FreeDrag (It's perfectly done, the map can moved around, that's not the problem). And then, I want to display the character's actions, everytime it's tapped. The problem then appeared. Everytime I want to FreeDrag the map, the Tap trigger always fired first before the FreeDrag one. Is there any way to differ the map sliding than the character tapping? Below is my code. while (TouchPanel.IsGestureAvailable) { GestureSample gesture = TouchPanel.ReadGesture(); switch (gesture.GestureType) { case GestureType.FreeDrag: { //a } break; case GestureType.Tap: { //b } break; } } Every time I first want to free drag (at the first touch), it always goes to "b" first (see commented line above), and then to "a" rather than immediately goes to "a". I've tried flick, but it seems the movement produced by flick is too fast, so freedrag fits the most. Is there any way or workaround to perform FreeDrag (or similar) without firing the Tap trigger? Thanks in advance.

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• How can a single script attached to multiple enemies provide separate behavior for each enemy?

  - by Syed

  I am making a TD game and now stucked at multiple enemies using same script. All is well with scripts attached with one enemy only. Problem is in running multiple enemies. Here is the overview. I have a Enemy object with which I have attached a 'RunEnemy' script. Flow of this script is: RunEnemy.cs: PathF p; p = gameObject.GetComponent<PathF>(); //PathF is a pathfinding algo which has 'search; function which returns a array of path from starting position PathList = p.search(starting position); //------------------------------- if(PathList != null) { //if a way found! if(moving forward) transform.Translate(someXvalue,0,0); //translates on every frame until next grid point else if(moving back) transform.Translate(0,someXvalue,0); ...and so on.. if(reached on next point) PathList = p.search(from this point) //call again from next grid point so that if user placed a tower enemy will run again on the returned path } Now I have attached this script and "PathF.cs" to a single enemy which works perfect. I have then made one more enemy object and attached both of these script to it as well, which is not working they both are overlapping movements. I can't understand why, I have attached these scripts on two different gameobjects but still their values change when either enemy changes its value. I don't want to go with a separate script for each enemy because there would be 30 enemies in a scene. How can I fix this problem?

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• Node.js MMO - process and/or map division

  - by Gipsy King

  I am in the phase of designing a mmo browser based game (certainly not massive, but all connected players are in the same universe), and I am struggling with finding a good solution to the problem of distributing players across processes. I'm using node.js with socket.io. I have read this helpful article, but I would like some advice since I am also concerned with different processes. Solution 1: Tie a process to a map location (like a map-cell), connect players to the process corresponding to their location. When a player performs an action, transmit it to all other players in this process. When a player moves away, he will eventually have to connect to another process (automatically). Pros: Easier to implement Cons: Must divide map into zones Player reconnection when moving into a different zone is probably annoying If one zone/process is always busy (has players in it), it doesn't really load-balance, unless I split the zone which may not be always viable There shouldn't be any visible borders Solution 1b: Same as 1, but connect processes of bordering cells, so that players on the other side of the border are visible and such. Maybe even let them interact. Solution 2: Spawn processes on demand, unrelated to a location. Have one special process to keep track of all connected player handles, their location, and the process they're connected to. Then when a player performs an action, the process finds all other nearby players (from the special player-process-location tracking node), and instructs their matching processes to relay the action. Pros: Easy load balancing: spawn more processes Avoids player reconnecting / borders between zones Cons: Harder to implement and test Additional steps of finding players, and relaying event/action to another process If the player-location-process tracking process fails, all other fail too I would like to hear if I'm missing something, or completely off track.

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• How can I make OpenGL textures scale without becoming blurry?

  - by adorablepuppy

  I'm using OpenGL through LWJGL. I have a 16x16 textured quad rendering at 16x16. When I change it's scale amount, the quad grows, then becomes blurrier as it gets larger. How can I make it scale without becoming blurry, like in Minecraft. Here is the code inside my RenderableEntity object: public void render(){ Color.white.bind(); this.spriteSheet.bind(); GL11.glBegin(GL11.GL_QUADS); GL11.glTexCoord2f(0,0); GL11.glVertex2f(this.x, this.y); GL11.glTexCoord2f(1,0); GL11.glVertex2f(getDrawingWidth(), this.y); GL11.glTexCoord2f(1,1); GL11.glVertex2f(getDrawingWidth(), getDrawingHeight()); GL11.glTexCoord2f(0,1); GL11.glVertex2f(this.x, getDrawingHeight()); GL11.glEnd(); } And here is code from my initGL method in my game class GL11.glEnable(GL11.GL_TEXTURE_2D); GL11.glClearColor(0.46f,0.46f,0.90f,1.0f); GL11.glViewport(0,0,width,height); GL11.glOrtho(0,width,height,0,1,-1); And here is the code that does the actual drawing public void start(){ initGL(800,600); init(); while(true){ GL11.glClear(GL11.GL_COLOR_BUFFER_BIT); for(int i=0;i<entities.size();i++){ ((RenderableEntity)entities.get(i)).render(); } Display.update(); Display.sync(100); if(Display.isCloseRequested()){ Display.destroy(); System.exit(0); } } }

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• Collision Detection Code Structure with Sloped Tiles

  - by ProgrammerGuy123

  Im making a 2D tile based game with slopes, and I need help on the collision detection. This question is not about determining the vertical position of the player given the horizontal position when on a slope, but rather the structure of the code. Here is my pseudocode for the collision detection: void Player::handleTileCollisions() { int left = //find tile that's left of player int right = //find tile that's right of player int top = //find tile that's above player int bottom = //find tile that's below player for(int x = left; x <= right; x++) { for(int y = top; y <= bottom; y++) { switch(getTileType(x, y)) { case 1: //solid tile { //resolve collisions break; } case 2: //sloped tile { //resolve collisions break; } default: //air tile or whatever else break; } } } } When the player is on a sloped tile, he is actually inside the tile itself horizontally, that way the player doesn't look like he is floating. This creates a problem because when there is a sloped tile next to a solid square tile, the player can't move passed it because this algorithm resolves any collisions with the solid tile. Here is a gif showing this problem: So what is a good way to structure my code so that when the player is inside a sloped tile, solid tiles get ignored?

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• 2D soft-body physics engines?

  - by Griffin

  Hi so i've recently learned the SFML graphics library and would like to use or make a non-rigid body 2D physics system to use with it. I have three questions: The definition of rigid body in Box2d is A chunk of matter that is so strong that the distance between any two bits of matter on the chunk is completely constant. And this is exactly what i don't want as i would like to make elastic, deformable, breakable, and re-connection bodies. 1. Are there any simple 2D physics engines, but with these kinds of characteristics out there? preferably free or opensource? 2. If not could i use box2d and work off of it to create it even if it's based on rigid bodies? 3. Finally, if there is a simple physics engine like this, should i go through with the proccess of creating a new one anyway, simply for experience and to enhance physics math knowledge? I feel like it would help if i ever wanted to modify the code of an existing engine, or create a game with really unique physics. Thanks!

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• Converting 2D coordinates from multiple viewpoints into 3D coordinates

  - by Kirk Smith

  Here's the situation. I've got a set of 2D coordinates that specify a point on an image. These 2D coordinates relate to an event that happened in a 3D space (video game). I have 5 images with the same event point on it, so I have 5 sets of 2D coordinates for a single 3D coordinate. I've tried everything I can think to translate these 2D coordinates into 3D coordinates, but the math just escapes me. I have a good estimate of the coordinates from which each image was taken, they're not perfect but they're close. I tried simplifying this and opening up Cinema 4D, a 3D modeling application. I placed 5 cameras at the coordinates where the pictures were taken and lined up the pictures with the event points for each one and tried to find a link, but nothing was forthcoming. I know it's a math question, but like I said, I just can't get it. I took physics in high school 6 years ago, but we didn't deal with a whole lot of this sort of thing. Any help will be very much appreciated, I've been thinking on it for quite a while and I just can't come up with anything.

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• Selling Android apps from Latvia? or should I just put banners?

  - by Roger Travis

  I am in Latvia ( which is not supported to sell apps at android market ), so I am thinking about the best way of monetizing my app. So far I've come up with such options: somehow imitate that I am from a supported country, get a bank account there, etc. use PayPal for in-app purchases. The player get, say, first 10 levels for free, but then is asked to pay 0.99$ for the rest of the game. downsides: player might not feel comfortable entering his paypal details into an app. also android market might not really like that. making the app free and get money from advertising... let's do some calculation here, say, I get 1m free downloads, each user during his playtime would see 10 banners, therefor 10m / 1000 * 0.3 = gives roughly 33k$ ( if we use adMob with their 0.3$ per 1000 impressions ). On the other hand, if we use paypal in app purchase, we need a 3% or more conversion rate to beat this... hmm... What do you think about all this? Thanks! edit: from what I just read all over the net, it looks like advertisers will change their eCPM price a lot without you understanding why... while using in-app paypal purchase you can at least somehow monitor the cashflow.

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• Dealing with "jumping" sprites: badly centered?

  - by GigaBass

  Thing is, I've used darkFunction Editor as a way to get all the spriteCoordinates off a spriteSheet for each individual sprite, and parse the .xml it generates inside my game. It all works fine, except when the sprites are all similarly sized, but when a sprite changes from a small sprite into a big one, such as here: When from walking from some direction, to attacking, it starts "jumping", appearing glitchy, because it's not staying in the same correct position, only doing so for the right attacking sprite, due to the drawing being made from the lower left part of the rectangle. I think someone experienced will immediately recognize the problem I mean, if not, when I return home soon, I will shoot a little youtube video demonstrating the issue! So the question is: what possible solutions are there? I've thought that some sort of individual frame "offset" system might be the answer, or perhaps splitting, in this case, the sprite in 2: the sword, and the character itself, and draw sword according to character's facing, but that might be overly complex. Another speculation would be that there might be some sort of method in LibGdx, the library I'm using, that allows me to change the drawing center (which I looked for and didn't find), so I could choose from where the drawing starts.

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• Monogame - Shader parameters missing

  - by Layoric

  I am currently working on a simple game that I am building in Windows 8 using MonoGame (develop3d). I am using some shader code from a tutorial (made by Charles Humphrey) and having an issue populating a 'texture' parameter. I'm not well versed writing shaders, so this might be caused by a more obvious problem. I have debugged through MonoGame's Content processor to see how this shader is being parsed, all the non 'texture' parameters are there and look to be loading correctly. Shader code below #include "PPVertexShader.fxh" float2 lightScreenPosition; float4x4 matVP; float2 halfPixel; float SunSize; texture flare; sampler2D Scene: register(s0){ AddressU = Clamp; AddressV = Clamp; }; sampler Flare = sampler_state { Texture = (flare); AddressU = CLAMP; AddressV = CLAMP; }; float4 LightSourceMaskPS(float2 texCoord : TEXCOORD0 ) : COLOR0 { texCoord -= halfPixel; // Get the scene float4 col = 0; // Find the suns position in the world and map it to the screen space. float2 coord; float size = SunSize / 1; float2 center = lightScreenPosition; coord = .5 - (texCoord - center) / size * .5; col += (pow(tex2D(Flare,coord),2) * 1) * 2; return col * tex2D(Scene,texCoord); } technique LightSourceMask { pass p0 { VertexShader = compile vs_4_0 VertexShaderFunction(); PixelShader = compile ps_4_0 LightSourceMaskPS(); } } I've removed default values as they are currently not support in MonoGame and also changed ps and vs to v4 instead of 2. Could this be causing the issue? As I debug through 'DXConstantBufferData' constructor (from within the MonoGameContentProcessing project) I find that the 'flare' parameter does not exist. All others seem to be getting created fine. Any help would be appreciated.

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• Converting world space coordinate to screen space coordinate and getting incorrect range of values

  - by user1423893

  I'm attempting to convert from world space coordinates to screen space coordinates. I have the following code to transform my object position Vector3 screenSpacePoint = Vector3.Transform(object.WorldPosition, camera.ViewProjectionMatrix); The value does not appear to be in screen space coordinates and is not limited to a [-1, 1] range. What step have I missed out in the conversion process? EDIT: Projection Matrix Perspective(game.GraphicsDevice.Viewport.AspectRatio, nearClipPlaneZ, farClipPlaneZ); private void Perspective(float aspect_Ratio, float z_NearClipPlane, float z_FarClipPlane) { nearClipPlaneZ = z_NearClipPlane; farClipPlaneZ = z_FarClipPlane; float yZoom = 1f / (float)Math.Tan(fov * 0.5f); float xZoom = yZoom / aspect_Ratio; matrix_Projection.M11 = xZoom; matrix_Projection.M12 = 0f; matrix_Projection.M13 = 0f; matrix_Projection.M14 = 0f; matrix_Projection.M21 = 0f; matrix_Projection.M22 = yZoom; matrix_Projection.M23 = 0f; matrix_Projection.M24 = 0f; matrix_Projection.M31 = 0f; matrix_Projection.M32 = 0f; matrix_Projection.M33 = z_FarClipPlane / (nearClipPlaneZ - farClipPlaneZ); matrix_Projection.M34 = -1f; matrix_Projection.M41 = 0f; matrix_Projection.M42 = 0f; matrix_Projection.M43 = (nearClipPlaneZ * farClipPlaneZ) / (nearClipPlaneZ - farClipPlaneZ); matrix_Projection.M44 = 0f; } View Matrix // Make our view matrix Matrix.CreateFromQuaternion(ref orientation, out matrix_View); matrix_View.M41 = -Vector3.Dot(Right, position); matrix_View.M42 = -Vector3.Dot(Up, position); matrix_View.M43 = Vector3.Dot(Forward, position); matrix_View.M44 = 1f; // Create the combined view-projection matrix Matrix.Multiply(ref matrix_View, ref matrix_Projection, out matrix_ViewProj); // Update the bounding frustum boundingFrustum.SetMatrix(matrix_ViewProj);

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• What is a good way to store tilemap data?

  - by Stephen Tierney

  I'm developing a 2D platformer with some uni friends. We've based it upon the XNA Platformer Starter Kit which uses .txt files to store the tile map. While this is simple it does not give us enough control and flexibility with level design. Some examples: for multiple layers of content multiple files are required, each object is fixed onto the grid, doesn't allow for rotation of objects, limited number of characters etc. So I'm doing some research into how to store the level data and map file. This concerns only the file system storage of the tile maps, not the data structure to be used by the game while it is running. The tile map is loaded into a 2D array, so this question is about which source to fill the array from. Reasoning for DB: From my perspective I see less redundancy of data using a database to store the tile data. Tiles in the same x,y position with the same characteristics can be reused from level to level. It seems like it would simple enough to write a method to retrieve all the tiles that are used in a particular level from the database. Reasoning for JSON/XML: Visually editable files, changes can be tracked via SVN a lot easier. But there is repeated content. Do either have any drawbacks (load times, access times, memory etc) compared to the other? And what is commonly used in the industry? Currently the file looks like this: .................... .................... .................... .................... .................... .................... .................... .........GGG........ .........###........ .................... ....GGG.......GGG... ....###.......###... .................... .1................X. #################### 1 - Player start point, X - Level Exit, . - Empty space, # - Platform, G - Gem

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• Block With Given ID Does Not Exist - Minecraft Mod

  - by inixsoftware

  I have tried to make my own Minecraft Block using Forge, but for some reason, when I use /give Playerxxx 1000 1 the game says, There is no block with id '1000' My Block Code: package net.minecraft.blockr; import net.minecraft.block.Block; import net.minecraft.block.material.Material; import net.minecraft.creativetab.CreativeTabs; public class Basalt extends Block { public Basalt(int par1, Material par2Material) { super(par1, par2Material); this.setCreativeTab(CreativeTabs.tabBlock); } } Mod code: package net.minecraft.blockr; import cpw.mods.fml.common.Mod; import cpw.mods.fml.common.Mod.Init; import cpw.mods.fml.common.network.NetworkMod; import cpw.mods.fml.common.registry.GameRegistry; import cpw.mods.fml.common.registry.LanguageRegistry; import net.minecraft.block.Block; import net.minecraft.block.material.Material; @Mod(modid="blockr", name="Blockr Mod", version="PreAlpha v0.0.1") @NetworkMod(clientSideRequired=true, serverSideRequired=false) public class BlockrMod { public static Block basalt; @Init public void load() { basalt = new Basalt(1000, Material.ground).setUnlocalizedName("basalt"); GameRegistry.registerBlock(basalt, basalt.getUnlocalizedName()); LanguageRegistry.addName(basalt, "Basalt Block"); } public String getVersion() { return "0.0.1"; } } What exactly is going wrong? My package is blockr (as my mod is called blockr) I know my mod was loaded as I see in Forge under Mods I see my mod

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• How to scroll in the physical world AndEngine?

  - by Esteban Quintero

  I am using andengine to make a game where a sprite (player) is going up across the stage, this is my world. final Rectangle ground = new Rectangle(0, CAMERA_HEIGHT - 2, CAMERA_WIDTH, 2, vertexBufferObjectManager); final Rectangle roof = new Rectangle(0, 0, CAMERA_WIDTH, 2, vertexBufferObjectManager); final Rectangle left = new Rectangle(0, 0, 2, CAMERA_HEIGHT, vertexBufferObjectManager); final Rectangle right = new Rectangle(CAMERA_WIDTH - 2, 0, 2, CAMERA_HEIGHT, vertexBufferObjectManager); final FixtureDef wallFixtureDef = PhysicsFactory.createFixtureDef(0, 0.5f, 0.5f); PhysicsFactory.createBoxBody(this.mPhysicsWorld, ground, BodyType.StaticBody, wallFixtureDef); PhysicsFactory.createBoxBody(this.mPhysicsWorld, roof, BodyType.StaticBody, wallFixtureDef); PhysicsFactory.createBoxBody(this.mPhysicsWorld, left, BodyType.StaticBody, wallFixtureDef); PhysicsFactory.createBoxBody(this.mPhysicsWorld, right, BodyType.StaticBody, wallFixtureDef); /* Create two sprits and add it to the scene. */ this.mScene.setBackground(autoParallaxBackground); this.mScene.attachChild(ground); this.mScene.attachChild(roof); this.mScene.attachChild(left); this.mScene.attachChild(right); this.mScene.registerUpdateHandler(this.mPhysicsWorld); The problem is that if the sprite reaches up and hits the wall, as I scroll here?

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• Libgdx detect when player is outside of screen

  - by Rockyy

  Im trying to learn libGDX (coming from XNA/MonoDevelop), and I'm making a super simple test game to get to know it better. I was wondering how to detect if the player sprite is outside of the screen and make it so it is impossible to go outside of the screen edges. In XNA you could do something like this: // Prevent player from moving off the left edge of the screen if (player.Position.X < 0) player.Position = new Vector2(0, player.Position.Y); How is this achieved in libgdx? I think it's the Stage that handles the 2D viewport in libgdx? This is my code so far: private Texture texture; private SpriteBatch batch; private Sprite sprite; @Override public void create () { float w = Gdx.graphics.getWidth(); float h = Gdx.graphics.getHeight(); batch = new SpriteBatch(); texture = new Texture(Gdx.files.internal("player.png")); sprite = new Sprite(texture); sprite.setPosition(w/2 -sprite.getWidth()/2, h/2 - sprite.getHeight()/2); } @Override public void render () { Gdx.gl.glClearColor(1, 1, 1, 1); Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT); if(Gdx.input.isKeyPressed(Input.Keys.LEFT)){ if(Gdx.input.isKeyPressed(Input.Keys.CONTROL_LEFT)) sprite.translateX(-1f); else sprite.translateX(-10.0f); } if(Gdx.input.isKeyPressed(Input.Keys.RIGHT)){ if(Gdx.input.isKeyPressed(Input.Keys.CONTROL_LEFT)) sprite.translateX(1f); else sprite.translateX(10f); } batch.begin(); sprite.draw(batch); batch.end(); }

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• Gesture Detector not firing

  - by Tyler

  So I'm trying to create a input class that implements a InputHandler & GestureListener in order to support both Android & Desktop. The problem is that not all the methods are being called properly. Here is the input class definition & a couple of the methods: public class InputHandler implements GestureListener, InputProcessor{ ... public InputHandler(OrthographicCamera camera, Map m, Player play, Vector2 maxPos) { ... @Override public boolean zoom(float originalDistance, float currentDistance) { //this.zoom = true; this.zoomRatio = originalDistance / currentDistance; cam.zoom = cam.zoom * zoomRatio; Gdx.app.log("GestureDetector", "Zoom - ratio: " + zoomRatio); return true; } @Override public boolean touchDown(int x, int y, int pointerNum, int button) { booleanConditions[TOUCH_EVENT] = true; this.inputButton = button; this.inputFingerNum = pointerNum; this.lastTouchEventLoc.set(x,y); this.currentCursorPos.set(x,y); if(pointerNum == 1) { //this.fingerOne = true; this.fOnePosition.set(x, y); } else if(pointerNum == 2) { //this.fingerTwo = true; this.fTwoPosition.set(x,y); } Gdx.app.log("GestureDetector", "touch down at " + x + ", " + y + ", pointer: " + pointerNum); return true; } The touchDown event always occurs but I can never trigger Zoom (or pan among others...). The following is where I register and create the input handler in the "Game Screen". public class GameScreen implements Screen { ... this.inputHandler = new InputHandler(this.cam, this.map, this.player, this.map.maxCamPos); Gdx.input.setInputProcessor(this.inputHandler); Anyone have any ideas why zoom, pan, etc... are not triggering? Thanks!

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• Logging library for (c++) games

  - by Klaim

  I know a lot of logging libraries but didn't test a lot of them. (GoogleLog, Pantheios, the coming boost::log library...) In games, especially in remote multiplayer and multithreaded games, logging is vital to debugging, even if you remove all logs in the end. Let's say I'm making a PC game (not console) that needs logs (multiplayer and multithreaded and/or multiprocess) and I have good reasons for looking for a library for logging (like, I don't have time or I'm not confident in my ability to write one correctly for my case). Assuming that I need : performance ease of use (allow streaming or formating or something like that) reliable (don't leak or crash!) cross-platform (at least Windows, MacOSX, Linux/Ubuntu) Wich logging library would you recommand? Currently, I think that boost::log is the most flexible one (you can even log to remotely!), but have not good performance update: is for high performance, but isn't released yet. Pantheios is often cited but I don't have comparison points on performance and usage. I've used my own lib for a long time but I know it don't manage multithreading so it's a big problem, even if it's fast enough. Google Log seems interesting, I just need to test it but if you already have compared those libs and more, your advice might be of good use. Games are often performance demanding while complex to debug so it would be good to know logging libraries that, in our specific case, have clear advantages.

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• help animating player in corona sdk

  - by andrew McCutchan

  working on a game in the corona sdk with lua and I need help so the player animates on the line drawn. Right now he animates at the beggining and the end but not on the line. here is the player code function spawnPlayerObject(xPlayerSpawn,yPlayerSpawn,richTurn) --spawns Rich where we need him. -- riches sprite sheet and all his inital spirites. We need to adjust this so that animations 3-6 are the only ones that animate when moving horizontally local richPlayer = sprite.newSpriteSet(richSheet1,1,6) sprite.add(richPlayer, "rich", 1,6,500,1) rich = sprite.newSprite(richPlayer) rich.x = xPlayerSpawn rich.y = yPlayerSpawn rich:scale(_W*0.0009, _W*0.0009) -- scale is used to adjust the size of the object. richDir = richTurn rich.rotation = richDir rich:prepare("rich") rich:play() physics.addBody( rich, "static", { friction=1, radius = 15 } ) -- needs a better physics body for collision detection. end and here is the code for the line function movePlayerOnLine(event) --for the original image replace all rich with player. if posCount ~= linePart then richDir = math.atan2(ractgangle_hit[posCount].y-rich.y,ractgangle_hit[posCount].x-rich.x)*180/math.pi playerSpeed = 5 rich.x = rich.x + math.cos(richDir*math.pi/180)*playerSpeed rich.y = rich.y + math.sin(richDir*math.pi/180)*playerSpeed if rich.x < ractgangle_hit[posCount].x+playerSpeed*10 and rich.x > ractgangle_hit[posCount].x-playerSpeed*10 then if rich.y < ractgangle_hit[posCount].y+playerSpeed*10 and rich.y > ractgangle_hit[posCount].y-playerSpeed*10 then posCount = posCount + 1 end end I don't think anything has changed recently but I have been getting an error when testing of " attempt to upvalue "rich" a nil value" on the second line, richDir = etc.

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