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• Drag and Drop Team Selection

  - by davidjwest

  I have a Fantasy F1 Website, currently users select their teams using dropdown menus. It works OK but isn't as user friendly as I would like. I would like to implement a drag and drop type of system, there's jQuery code out there that would go part of the way to allowing me to do this: http://jqueryui.com/demos/draggable/ But I am not sure about how to integrate that into PHP and MySQL, my jQuery skills are limited! I'd also need to stop them spending more than a certain amount of money, each driver has a value and the teams can only spend a certain amount of money. There's also limits for example you can only pick a driver once, but you can have three different drivers. Finally, how would you decide that the user had picked their team, I don't want a submit button as that kind of defeats the object of the exercise! Thanks for any advice, I don't expect anyone to write the code for me but some pointers would be greatly appreciated.

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• Placing items randomly in a dynamically generated terrain

  - by Programlocura

  I'm currently working on a 'Tiny wings' like game. I've already asked about the angle of the items in curved lines and i solved (thank you for responses),i'm currently placing the items in random positions, but the terrain it's dynamically and i don't get this working. I've a vector with the points of the terrain, and i'm doing something similar to this (Iterating trough vector): if( _SPManager && i % 15 == 0 && i != 0 ) { if ( _settings.specialPoints && _currentPoints < _settings.specialPoints ) { _SPManager.addPoint( _hillsPosition[i].x , _hillsPosition[i].y ); _currentPoints++; } } But it isn't working as i expected. It isn't displaying the right number of items (Always shows less than i specified). How do i should place the items? Thanks :)

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• Help me choose an engine

  - by Gjorgji

  So far i've been trying to make a RTS in pygame but, i feel like 2d is not enough and pygame has me do a lot of stuff that i would not like doing. What i would like doing is working on the AI gameplay and such and not worying too much about how to display stuff,physics and the like too much. So far Unity has boo which is supposed to be similar to python i wonder if that could work. How similar is it to python should i use this? Other options as far as i can see are ogre3d python bindings and UDK. Which would best suit my needs?

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• Charakter coding / programming

  - by Jery

  lately I tryed a few times to create charakters for some games, but at some certain point (especially when collision detection came in) everything became messy and the interaction between chars, the world and certain items had a lot of bugs. So here is my question, how do you ussualy keep track of actions that your charakter is allowed to do, or more in general do you have some links / advices how to set up a char efficiantly? I´m working on a char right now, who should at least be able to run, jump, pick items up and use different fighting animations. Most ideas I came up with until now use some kind of action.priority / action.duration system to determain whats possible and what not, or a "action-manager" which defines for every action what is possible from that action on but it all doesnt work that well together =\ thx in advance for some input

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• Showing range on hexagonal grid

  - by user23673

  Here is the situation. I have hexagonal board,and a unit on it,with speed or move value 4.Diffrent terrain has a diffrent cost.When i click on the unit,game should show me a move range. My solution was to check each hex in range of 4,with A* pathfinding,and if path cost was less than 4 then this hex was in range.Finally game nicely show me range of that unit. My question is: Is there other solution to search for range on hex grids or square grid,because even if i am really proud of what i did in my solution,i think,it is a little to exaggerated?:)) What make me ask this question?I noticed that when unit speed is 4 or 6 or even 8,time to computing range for my computer was really good,but when speed was 10 and more i noticed that i needed to wait few second to compute.Well in real games i rather dont see something like this and my A* pathfinding is rather well optimized,so im thinking that my solution is wrong. Thanks for any replies.

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• Triggering State Changes with Health Counter

  - by Hairgami_Master

  I'm developing a game where the player changes states as their health decreases. Below 50, it should trigger animation1. Below 30, it should trigger animation2. The problem is, I only want to trigger animation1 once. But my game timer is checking every "frame", so it's triggering animation1 every cycle below 50. I only want it to trigger once, then not again until it's gone over 50 and then naturally decreased back to below 50. Are there any tried and true strategies for triggering state changes as a timer counts down (without the over-triggering problem)? I thought I could say: if (health == 50) animation1.play(); but sometimes, health never equals exactly 50, so it will skip right past that statement.

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• have a problem with my 2nd quad bottom left vertex position ? weirdd

  - by RubyKing

  Hey all I'm just trying to add another quad to my frustum and when doing so I get this weird little error. What happens is the bottom left side of my quad seems to stick to the center point for no apparent reason that I can think of and or figure out from. has anyone else experienced this issue and knows a solution or would you like more information please do ask. here is my main.cpp file http://pastebin.com/g9q8uAsd I think its because of 2 different quad vertex array data is in the same array.

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• How to make an object fly out of a slingshot?

  - by Deza

  At the moment I'm improvising a slingshot, the user can click and drag the projectile and let go. The force on the object is calculated by getting the distance between the vector of the slingshots two forks and the vector between where the user pulled it. However this will always result in a positive number and will not take into account the angle of the object relative to that of the slingshot. How can I make it fly out of the slingshot correctly?

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• Where can I find some Cocos2dx beginner tutorials?

  - by Skeith

  I have tried to start programing with Cocos2dx but I have no idea where to start and the tutorials are no very not very helpful. What I am looking for is some tutorials/guides on how to begin using cocos2dx for the total beginner. Things like how to setup a project and run it and how to do simple things like draw graphics on the screen, play sounds and get input. I am running on windows 7 and have been told by the Cocos2dx wiki that this may cause problems so if anyone has a solution to this that would also be helpful.

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• UDK: Toggle Material on Brushes?

  - by user50300

  I'm attempting to change / toggle the material that's applied to a BSP brush. I've seen where it's possible on static meshes, but I can't seem to get it to work on brushes. Below is an example scenario. The ground (BSP Brush) is covered in a stone material The player hits a trigger. A new "moss" material is applied to the brush, removing the old stone material. Any assistance you could offer would be greatly appreciated.

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• Implementing unlockable items on Android

  - by coder_For_Life22

  I know this would be a beginners question (some of you might think) but I would like to know different approaches for this. I have a game with lets say 20 unlockable items, at the main menu I have a button where the user can go to an activity and view the unlockable items. So I would like for it to have a "Locked image" and under it a text telling you what the item is and maybe how to unlock it. What is the best way of going about this? And then when the item is unlocked during the game, maybe put a variable in the shared preference and check at the beginning of the activity with the unlockabled items. Let me know what you guys think. Thanks.

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• Is there a prohibition against scaling collision shapes at runtime?

  - by Almo

  So, I have a StaticMeshComponent attached to an Actor: Begin Object Class=StaticMeshComponent Name=StaticMeshComponentObject StaticMesh=StaticMesh'QF_Art_Powers.Mesh.GP_ForcePush' CollideActors=true BlockActors=false //Scale3D=(X=5, Y=1.5, Z=3) // ALMODEBUG End Object CollisionComponent=StaticMeshComponentObject Components.Add(StaticMeshComponentObject) Ordinarily, the actor gets spawned, anything touching it gets bumped, and the actor despawns itself. If I set the Scale3D as a default property, everything works as I expect. But I want to scale it at runtime, like this: function SetImpulseComponentTemplate(QuadForceBoxImpulseComponent Value) { Local Vector ScaleVec; ScaleVec.X = Value.Length; ScaleVec.Y = Value.Width; ScaleVec.Z = Value.Height; CollisionComponent.SetScale3D(ScaleVec); } When I do this, the thing only collides as if it were not scaled. If I leave the actor spawned so I can see it, it is scaled. If I also "show collision", the collision displays correctly as well. Is there a prohibition against scaling collision shapes at runtime?

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• How do I make a Java gave without a JFrame?

  - by kullalok

  I am working on an arcade-like game, and so far, I have been using JFrame. All the action occurs in the JFrame basically. However, I've noticed that a lot of games that you install on a computer don't have a frame. When you play them on Windows, the game covers the entire screen (the start bar disappears and you can't access any other application on your computer). I'd like to do that for my game. Is it possible to do so with Java? If so, how would I do this?

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• Dynamic object creation with HashMap

  - by Salor

  I want to use a HashMap to dynamically create objects based on the key. I have a Random Map Generator that stores the maps in 3D Arrays of Type Integer[][][]. Upon creation of the actual map I iterate through this array and based on the Integer I want to create the right block. Example: Integer[][][] map ... map[6][6][6] = 3; 3 is a Earth-Block and now I want to initialize a new Block of this type and give it the right coordinates. Currently I store my Bindings from Integer to Class in a HashMap(Integer, String) and create my objects like that: int id = array[x][y][z]; String block_name = Blocks.map.get(id); Block block = (Block) Class.forName(block_name).newInstance(); block.setPosition(x,y,z); But I want to avoid newInstance() if possible. I've never worked that dynamically with Java before and I couldn't find a solution like changing the HashMap to (Integer, Class) or something. I just need to create a new Object based upon the Integer. Any ideas/solutions? Thanks in advance and have a wonderful day!

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• Random generation of interesting puzzle levels?

  - by monsterfarm

  I'm making a Sokoban-like game i.e. there's a grid that has some crates on it you can push and you have to get the crates on crosses to win the level (although I'm going to add some extra elements to it). Are there any general algorithms or reading material I can look at for how I could go about generating interesting (as in, not trivial to solve) levels for this style of game? I'm aware that random level generators exist for Sokoban but I'm having trouble finding the algorithm descriptions. I'm interested in making a game where the machine can generate lots of levels for me, sorted by difficulty. I'm even willing to constrain the rules of the game to make the level generation easier (e.g. I'll probably limit the grid size to about 7x7). I suspect there are some general ways to do level generation here as I've seen e.g. Traffic Jam-like games (where you have to move blocks around the free some block) with 1000s of levels where each one has a unique solution. One idea I had was to generate a random map in its final state (i.e. where all crates are on top of their crosses) and then the computer would pull (instead of push) these crates around to create a level. The nice property here is that we know the level is solvable. However, I'd need some heuristics to ensure the level was interesting.

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• networking without port forwarding

  - by Wallacoloo

  I'm trying to add networking functionality to my game. I want any user to be able to host the game, and anyone to be able to connect as a client. The client sends info to the host about their player's position, etc. When the host receives a message, it validates it and then broadcasts it to its other clients. I will primarily be dealing with UDP, but will also need TCP for chat & lobby stuff. The problem is that I can't seem to get a packet sent from the client to the host or the other way around without enabling port forwarding on my router. But I don't think this is necessary. I believe the reason I need port forwarding is because I want to send a packet from 1 computer on a LAN to another computer on a different LAN, but neither of them have a global ip address since they're in a LAN. So really, I can only send packets targeting the other network's router, which must forward it on to the machine I want to reach. So how can I do this without port forwarding? Somehow a web server can communicate with my computer, which doesn't have a global ip, without port forwarding. And I've played plenty of multi-player games that don't require me to enable port forwarding. So it must be possible. Btw, I'm using SDL_Net. I don't think this will change anything though.

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• SDL blitting multiple surfaces at once

  - by extropic_engine

  I'm trying to write a platforming game where the sprites for the level backgrounds are broken up into 512x512 chunks. I keep 3 chunks in memory at a time and I'm trying to write code to blit all three to the screen. Here is the current code I have: SDL_Rect where; where.y = -game->camera->y; where.x = -game->camera->x - MAP_WIDTH; SDL_BlitSurface(left_chunk, NULL, screen, &where); where.x = -game->camera->x; SDL_BlitSurface(center_chunk, NULL, screen, &where); where.x = -game->camera->x + MAP_WIDTH; SDL_BlitSurface(right_chunk, NULL, screen, &where); The issue I'm running into is that whichever chunk gets blitted first is the only one that shows up. The rest fail to appear onscreen. I think the issue might have something to do with alpha transparency, but even if the chunks don't overlap at all they still fail to blit. In other parts of the code I'm blitting multiple things to the screen at once, such as characters and backgrounds, and they all show up correctly. This particular segment of code is the only area I'm encountering this problem. If I comment out the line that blits left_chunk, it changes to this:

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• The need to reduce mesh count

  - by OJW

  In Panda3d, I load a model and place 10000 references to it in the scene-graph. It runs at (say) 2Hz. I load a 3d model containing 10000 copies of that exact same object, and it runs at (say) 60Hz. As does using the flattenStrong() command which is effectively the same thing but at runtime. So the question is: is this behaviour a peculiarity of Panda3d, or is it a fundamental law which applies to all games engines?

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• 3D Location Handling

  - by tgrosinger

  I am thinking about making a simulator type game that will involve having lots of small objects in a 3D space. What is the typical solution for handling these objects? The first thing that comes to mind is a 3D Array, but I can't help but think there is a more efficient solution. Another idea that comes to mind is objects having possession of smaller items. For example a House possesses a Table which possesses a Cup and Bowl. The final way I can think of handling this is just having an array of "objects" that each have an x, y, z value. While this would make storing them easy I do not understand how you would detect collisions without just looking at every possible object and checking to see if it is in the way. Are there other ways of holding onto these objects that is more efficient?

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• Create a Texture2D from larger image

  - by Dialock

  I am having trouble with the basic logic of this solution: Xna: Splitting one large texture into an array of smaller textures in respect to my specific problem (specifically, I'm looking at the second answer.) How can I use my source rectangle that I already use for drawing to create a new Texture2D? spriteBatch.Draw(CurrentMap.CollisionSet, currentMap.CellScreenRectangle(x, y), CurrentMap.TileSourceRectangle(currentMap.MapCells[x, y].TileDepths[4]), Color.FromNonPremultiplied(0,0,0, 45), 0.0f, Vector2.Zero, SpriteEffects.None, 0.91f); I know I want a method that I started so: //In Update Method of say the player's character. Texture2D CollisionTexture = ExtractTexture(MapManager.CurrentMap.CollisionSet, MapManager.TileWidth, MapManager.TileHeight); // In MapManager Class who knows everything about tiles that make up a level. public Texture2D ExtractTexture(Texture2D original, int partWidth, int partheight, MapTile mapCell) { var dataPerPart = partWidth * partheight; Color[] originalPixelData = new Color[original.Width * original.Height]; original.GetData<Color>(originalPixelData); Color[] newTextureData = new Color[dataPerPart]; original.GetData<Color>(0, CurrentMap.TileSourceRectangle(mapCell.TileDepths[4]), originalPixelData, 0, originalPixelData.Count()); Texture2D outTexture = new Texture2D(original.GraphicsDevice, partWidth, partheight); } I think the problem is I'm just not understanding the overload of Texture2D.GetData< Part of my concern is creating an array of the whole texture in the first place. Can I target the original texture and create an array of colors for copying based on what I already get from the method TileSourceRecatangle(int)?

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• change texture at runtime

  - by user1509674

  How can I change the texture at runtime. I have done changing the label(text) at runtime. The following code is used using UnityEngine; using System.Collections; public class switchtime : MonoBehaviour { // Use this for initialization private bool showLabel = false; private bool showLabe2 = false; private bool showLabe3 = false; private bool showLabe4 = false; public void Start() { Invoke("ToggleLabel", 1); Invoke("ToggleLabel2", 3); Invoke("ToggleLabel3",6 ); Invoke("ToggleLabel4", 9); } public void ToggleLabel() { showLabel = !showLabel; } public void ToggleLabel2() { showLabe2 = !showLabe2; } public void ToggleLabel3() { showLabe3 = !showLabe3; } public void ToggleLabel4() { showLabe4 = !showLabe4; } public void OnGUI() { if (showLabel) { GUI.Label(new Rect(300, 200, 100, 20), "Copying window file.."); } if (showLabe2) { GUI.Label(new Rect(40, 40, 100, 20), "Epanding windows file.."); } if (showLabe3) { GUI.Label(new Rect(80, 80, 100, 20), "Installing Feature.."); } if (showLabe4) { GUI.Label(new Rect(100, 100, 100, 20), "Installing Updates"); } } } Now I need to change the GUITexture at runtime. How can do this? Can anybody help me in coding? Here is some changes I made. I worked on changing the gameObject when mouse is placed on it. This is the code I applied and its working for me using UnityEngine; using System.Collections; public class change : MonoBehaviour { // Use this for initialization public GameObject newSprite; private Vector3 currentSpritePosition; void update() { } void Start() { newSprite.renderer.enabled = false; currentSpritePosition = transform.position; //then make it invisible renderer.enabled = false; //give the new sprite the position of the latter newSprite.transform.position = currentSpritePosition; //then make it visible newSprite.renderer.enabled = true; } void OnMouseExit(){ //just the reverse process renderer.enabled = true; newSprite.renderer.enabled = false; } } Now the problem is that, in same code I need to set a time so that the text get loaded without the mouse click. I mean a particular time to load each text one after the another. Here is my screen shot Here I have placed the image one below the another,when the mouse is hovered on it it will change the text from bold to normal text.Changes process stated in (image 2,3).That code I posted is working for me.

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• Steering evaluate fitness

  - by Vodemki

  I've made a simple game with a steering model that manage a crowd of agents. I use an genetic algorithm to find the best parameters to use in my system but I need to determine a fitness for each simulation. I know it's something like that: number of collisions * time to reach goal * effort But I don't know how to calculate the effort, is there a special way to do that ? Here is what I've done so far: // Evaluate the distance from agents to goal Real totalDistance(0.0); for (unsigned i=0; i<_agents.size(); i++) { totalDistance += _agents[i]->position().distance(_agents[i]->_goal->position()); } Real totalWallsCollision(0.0); for (unsigned i=0; i<_agents.size(); i++) { for (unsigned j=0; j<walls.size(); j++) { if ( walls[j]->inside(_agents[i]->position()) ) { totalCollision += 1.0; } } } return totalDistance + totalWallsCollision; Thanks for your help.

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• How to obtain a camera stream from Unity without rendering it to the player's screen?

  - by aiguy

  I'd like to stream the output of two cameras to a separate process. Right now, it looks like the best way to do that is to grab the rendered camera views from the screen via platform specific screen capture hooks then compress them real time with h.264. Is there a way to grab the input of the cameras within unity and avoid rendering them to the screen? One solution I'm considering involves using Unity's multiplayer capability to run the game on a separate machine and grab it from that screen buffer, unbeknownst to the player.

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• SDL beginner: create Rectangle surface filled with color

  - by user3689

  im learning SDL , i like to create Rectangle surface with color that is not image . here is my code that compiles fine but dosnt work : im passing the function this params: SDL_Surface* m_screen = SDL_SetVideoMode(SCREEN_WIDTH,SCREEN_HEIGHT,SCREEN_BPP,SDL_SWSURFACE); SDL_FillRect(m_screen,&m_screen->clip_rect,SDL_MapRGB(m_screen->format,0xFF, 0xFF, 0xFF)); ... Button button(m_screen,0,0,50,50,255,0,0) ... ... Button::Button(SDL_Surface* screen,int x,int y,int w,int h,int R, int G, int B) { SDL_Rect box; SDL_Surface * ButtonSurface; ButtonSurface = NULL ; Uint32 rmask, gmask, bmask, amask; #if SDL_BYTEORDER == SDL_BIG_ENDIAN rmask = 0xff000000; gmask = 0x00ff0000; bmask = 0x0000ff00; amask = 0x000000ff; #else rmask = 0x000000ff; gmask = 0x0000ff00; bmask = 0x00ff0000; amask = 0xff000000; #endif box.x = x; box.y = y; box.w = w; box.h = h; ButtonSurface = SDL_CreateRGBSurface(SDL_SWSURFACE, box.w,box.h, 32, rmask, gmask, bmask, amask); if(ButtonSurface == NULL) { LOG_MSG("Button::Button Button failed"); } SDL_FillRect(screen,&box,SDL_MapRGB ( ButtonSurface->format, R, G, B )); //ut.ApplySurface(0,0,ButtonSurface,screen); SDL_BlitSurface(ButtonSurface,NULL,screen,&box); } what im doing here wrong ?

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• How to make the game wait for an animation to finish?

  - by petervaz

  I'm teaching myself andengine while trying to make a match-3 puzzle, so far I have a grid of gems that I populate and can move then around. Matching gems and new gems falling is working already. My problem is that the game keeps flowing while animations runs. How can I make the flow suspend until movement is done? I use entity modifiers for the gems animations. MoveYModifier for the fall and PathModifier for the swap.

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