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  • What are the valid DepthBuffer Texture formats in DirectX 11? And which are also valid for a staging resource?

    - by sebf
    I am trying to read the contents of the depth buffer into main memory so that my CPU side code can do Some Stuff™ with it. I am attempting to do this by creating a staging resource which can be read by the CPU, which I will copy the contents of the depth buffer into before reading it. I keep encountering errors however, because of, I believe, incompatibilities between the resource format and the view formats. Threads like these lead me to believe it is possible in DX11 to access the depth buffer as a resource, and that I can create a resource with a typeless format and have it interpreted in the view as another, but I cannot get it to work. What are the valid formats for the resource to be used as the depth buffer? Which of these are also valid for a CPU accessible staging resource?

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  • C#/XNA get hardware mouse position

    - by Sunder
    I'm using C# and trying to get hardware mouse position. First thing I tryed was simple XNA functionality that is simple to use Vector2 position = new Vector2(Mouse.GetState().X, Mouse.GetState().Y); After that i do the drawing of mouse as well, and comparing to windows hardware mouse, this new mouse with xna provided coordinates is "slacking off". By that i mean, that it is behind by few frames. For example if game is runing at 600 fps, of curse it will be responsive, but at 60 fps software mouse delay is no longer acceptable. Therefore I tried using what I thought was a hardware mouse, [DllImport("user32.dll")] [return: MarshalAs(UnmanagedType.Bool)] public static extern bool GetCursorPos(out POINT lpPoint); but the result was exactly the same. I also tried geting Windows form cursor, and that was a dead end as well - worked, but with the same delay. Messing around with xna functionality: GraphicsDeviceManager.SynchronizeWithVerticalRetrace = true/false Game.IsFixedTimeStep = true/fale did change the delay time for somewhat obvious reasons, but the bottom line is that regardless it still was behind default Windows mouse. I'v seen in some games, that they provide option for hardware acelerated mouse, and in others(I think) it is already by default. Can anyone give some lead on how to achieve that.

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  • Getting a sphere to roll down a .FBX object Unity3D/C#

    - by Timothy Williams
    I'm working on a little ramp and ball game in Unity, I modeled the ramp outside Unity and exported it to a .FBX file, then I imported the ramp in to Unity. I set up the ball and ramp, both have Rigidbodies, Ramp is set to isKinematic = true, yet when I play the game the ball just falls right through the ramp and hits the floor below it fine. So it's something wrong with the ramp. Am I doing something wrong? Are .FBX files unable to apply physics? Thanks, Tim.

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  • XNA - Saving Game Data without TypeWriter?

    - by Zabby
    In the past, I've had some trouble with reading and writing content for XNA. I think I'm firmly set on this tutorial which sets up a four project structure (Game, Content, Library, Pipeline Extension) for the solution that other websites suggest, too. The options it offers for content reading seem great. But problem! This tutorial (and all others I've found) have stated that the Content Pipeline Extension Project is not distributed with the game, which is fine in itself, but this is combined with the fact that any content writing objects are placed in this non-distributable library. The ability to actually write content of an already existing type (save game files, namely) is pretty critical to the project I'm trying to make. I've already learned the hard way you simply can't place the Content Pipeline reference in another project besides the extension for easier access to the intermediate deserializer. Is there another object I can access for writing save game data? Am I actually, despite the warnings of this tutorial, able to use the TypeWriter outside of the Content Pipeline Extension Project? Or is there a third option I am missing here?

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  • Transform 3D vectors between coordinate systems

    - by Nir Cig
    I've got 6 points in 3D space: A,B,C,D,E,F, that represent 4 vectors. AB is perpendicular to AC and DE is perpendicular to DF. I need to find a transformation matrix M, that transforms AB to DE and AC to DF. In other words: M·AB=DE, M·AC=DF If no scaling was involved, this could be solved with a simple rotation matrix. But since the ratios |AB|/|DE|, |AC|/|DF| might be different, I'm not sure how to proceed.

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  • Moving around/avoiding obstacles

    - by János Harsányi
    I would like to write a "game", where you can place an obstacle (red), and then the black dot tries to avoid it, and get to the green target. I'm using a very easy way to avoid it, if the black dot is close to the red, it changes its direction, and moves for a while, then it moves forward to the green point. How could I create a "smooth" path for the computer controlled "player"? Edit: Not the smoothness is the main point, but to avoid the red blocking "wall" and not to crash into it and then avoid it. How could I implement some path finding algorithm if I just have basically 3 points? (And what would it make the things much more complicated, if you could place multiple obstacles?)

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  • How to attach a sprite to a TMXTiledMap at a particular coordinate, in AndEngine?

    - by shailenTJ
    I am trying to add a sprite at a "grid" location on the tiled map. The TMX tiled Map is like a grid, and you can access the size of the grid by calling mTMXtiledMap.getTileRows() and mTMXtiledMap.getTileColumns(). I want to add an object at grid location, say (2, 5). My tileMap is of size (10,10). How can I do that? There is no function like mTMXTiledMap.addChild(int x, int y, Entity mEntity). I would appreciate any suggestions!

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  • Unity3d: Box collider attached to animated FBX models through scripts at run-time have wrong dimension

    - by Heisenbug
    I have several scripts attached to static and non static models of my scene. All models are instantiated at run-time (and must be instantiated at run-time because I'm procedural building the scene). I'd like to add a BoxCollider or SphereCollider to my FBX models at runtime. With non animated models it works simply requiring BoxCollider component from the script attached to my GameObject. BoxCollider is created of the right dimension. Something like: [RequireComponent(typeof(BoxCollider))] public class AScript: MonoBehavior { } If I do the same thing with animated models, BoxCollider are created of the wrong dimension. For example if attach the script above to penelopeFBX model of the standard asset, BoxCollider is created smaller than the mesh itself. How can I solve this?

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  • Orthographic Zooming with 0,0 at top/left

    - by Sean M.
    I'm trying to implement zooming on my 2D game. Since it's using orthographic projection, I thought it would be easy to implement zooming. After looking around the internet, I found a bunch of explanations and samples on how to do this if (0,0) is the center of the screen with the orthographic projection. The problem is, my ortho projection has (0,0) at the top-left (similar to XNA/Monogame, and a couple others). I could not find any examples about how to implement zooming to the center of the screen when the center is not (0,0). And help/links/code examples would be greatly appreciated.

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  • converting a mouse click to a ray

    - by Will
    I have a perspective projection. When the user clicks on the screen, I want to compute the ray between the near and far planes that projects from the mouse point, so I can do some ray intersection code with my world. I am using my own matrix and vector and ray classes and they all work as expected. However, when I try and convert the ray to world coordinates my far always ends up as 0,0,0 and so my ray goes from the mouse click to the centre of the object space, rather than through it. (The x and y coordinates of near and far are identical, they differ only in the z coordinates where they are negatives of each other) GLint vp[4]; glGetIntegerv(GL_VIEWPORT,vp); matrix_t mv, p; glGetFloatv(GL_MODELVIEW_MATRIX,mv.f); glGetFloatv(GL_PROJECTION_MATRIX,p.f); const matrix_t inv = (mv*p).inverse(); const float unit_x = (2.0f*((float)(x-vp[0])/(vp[2]-vp[0])))-1.0f, unit_y = 1.0f-(2.0f*((float)(y-vp[1])/(vp[3]-vp[1]))); const vec_t near(vec_t(unit_x,unit_y,-1)*inv); const vec_t far(vec_t(unit_x,unit_y,1)*inv); ray = ray_t(near,far-near); What have I got wrong? (How do you unproject the mouse-point?)

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  • libgdx rotation (animation, arrays) issues and help needed

    - by johnny-b
    well i am a noob at java and libgdx. i got the homing bullet working with the help of someone. now i am smashing my head as to how i can make it rotate so it faces the ball (which is the main character) when it goes around it or when it is coming towards it. the bullet is facing <--- and the code below is what i have done so far. also i used sprites for the bullet and also animation method. Also how do i make it an array/arraylist which is best so i can have multiple bullets at random or placed places. i tried many things nothing workd :( thank you for the help. // below is the bullet or enemy if you want to call it. public class Bullet extends Sprite { public static final float BULLET_HOMING = 6000; public static final float BULLET_SPEED = 300; private Vector2 velocity; private float lifetime; public Bullet(float x, float y) { velocity = new Vector2(0, 0); setPosition(x, y); } public void update(float delta) { float targetX = GameWorld.getBall().getX(); float targetY = GameWorld.getBall().getY(); float dx = targetX - getX(); float dy = targetY - getY(); float distToTarget = (float) Math.sqrt(dx * dx + dy * dy); dx /= distToTarget; dy /= distToTarget; dx *= BULLET_HOMING; dy *= BULLET_HOMING; velocity.x += dx * delta; velocity.y += dy * delta; float vMag = (float) Math.sqrt(velocity.x * velocity.x + velocity.y * velocity.y); velocity.x /= vMag; velocity.y /= vMag; velocity.x *= BULLET_SPEED; velocity.y *= BULLET_SPEED; Vector2 v = velocity.cpy().scl(delta); setPosition(getX() + v.x, getY() + v.y); setOriginCenter(); setRotation(velocity.angle()); lifetime += delta; setRegion(AssetLoader.bulletAnimation.getKeyFrame(lifetime)); } } // this is where i load the images. public class AssetLoader { public static Animation bulletAnimation; public static Sprite bullet1, bullet2; public static void load() { texture = new Texture(Gdx.files.internal("SpriteN1.png")); texture.setFilter(TextureFilter.Nearest, TextureFilter.Nearest); bullet1 = new Sprite(texture, 380, 350, 45, 20); bullet1.flip(false, true); bullet2 = new Sprite(texture, 425, 350, 45, 20); bullet2.flip(false, true); Sprite[] bullets = { bullet1, bullet2 }; bulletAnimation = new Animation(0.06f, aims); bulletAnimation.setPlayMode(Animation.PlayMode.LOOP); } public static void dispose() { // We must dispose of the texture when we are finished. texture.dispose(); } // this is for the rendering of the images etc public class GameRenderer { private Bullet bullet; private Ball ball; public GameRenderer(GameWorld world) { myWorld = world; cam = new OrthographicCamera(); cam.setToOrtho(true, 480, 320); batcher = new SpriteBatch(); // Attach batcher to camera batcher.setProjectionMatrix(cam.combined); shapeRenderer = new ShapeRenderer(); shapeRenderer.setProjectionMatrix(cam.combined); // Call helper methods to initialize instance variables initGameObjects(); initAssets(); } private void initGameObjects() { ball = GameWorld.getBall(); bullet = myWorld.getBullet(); scroller = myWorld.getScroller(); } private void initAssets() { ballAnimation = AssetLoader.ballAnimation; bulletAnimation = AssetLoader.bulletAnimation; } public void render(float runTime) { Gdx.gl.glClearColor(0, 0, 0, 1); Gdx.gl.glClear(GL30.GL_COLOR_BUFFER_BIT); batcher.begin(); // Disable transparency // This is good for performance when drawing images that do not require // transparency. batcher.disableBlending(); // The ball needs transparency, so we enable that again. batcher.enableBlending(); batcher.draw(AssetLoader.ballAnimation.getKeyFrame(runTime), ball.getX(), ball.getY(), ball.getWidth(), ball.getHeight()); batcher.draw(AssetLoader.bulletAnimation.getKeyFrame(runTime), bullet.getX(), bullet.getY()); // End SpriteBatch batcher.end(); } } // this is to load the image etc on the screen i guess public class GameWorld { public static Ball ball; private Bullet bullet; private ScrollHandler scroller; public GameWorld() { ball = new Ball(480, 273, 32, 32); bullet = new Bullet(10, 10); scroller = new ScrollHandler(0); } public void update(float delta) { ball.update(delta); bullet.update(delta); scroller.update(delta); } public static Ball getBall() { return ball; } public ScrollHandler getScroller() { return scroller; } public Bullet getBullet() { return bullet; } } so there is the whole thing. the images are loaded via the AssetLoader then to the GameRenderer and GameWorld via the Bullet class. i am guessing that is how it is. sorry newbie so still learning. thank you in advace for the help or any advice.

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  • How to make rigid bodies collide with Apex Clothing in PhysX for Maya

    - by b1nary.atr0phy
    According to the [Apex] Clothing Overview section of the documentation: Colliding with Rigid Bodies Rigid bodies present in your scene will push clothing around roughly as you might expect. Well, I beg to differ. The Apex Cloth collides with the floor just fine, but that's about the only thing it collides with (unless I add ragdoll to the same skeleton that the cloth is attached to.) So for example, if I try to bounce a ball (dynamic rigid body) into the cloth, it simply bounces through it. If I try to walk an actor with ragdoll through it, he simply clips through it as well. Anyone have any insight on this?

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  • How do walls affect lighting?

    - by Milkboat
    I have been trying to implement a simple form of lighting in my 2D game. In the screenshot, I don't think it looks very good, kind of just plastered over the top of the map. How would the wall effect how the lighting is displayed? Just looking for tips on how to make my lighting look a bit better. Right now I gave each tile a light value and I change that depending on if there is a light source near by. I don't take in account if there are any objects near by. Screenshot:

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  • Textures quality issues with Libgdx

    - by user1876708
    I have drawn several vector objets and characters ( in Adobe Illustrator ) for my game on Android. They are all scalable at any size without any quality losses ( of course it's vector ^^ ). I have tried to simulate my gameboard directly on Illustrator just before setting my assests on libdgx to implement them in my game. I set all the objects at the good size, so that they fit perfectly on my XHDPI device I am running my test on. As you can see it works great ( for me at least ^^ ), the PNG quality is good for me, as expected ! So I have edited all my PNG at this size, set my assets on libgdx and build my game apk. And here is a screenshot of my gameboard ( don't pay attention at the differences of placing and objects, but check at the objets presents on both screenshot ). As you can see, I have a loss of my PNG quality in the game. It can be seen clealry on the hedgehog PNG, but also ( but not as obvious ) on the mushroom ( check at the outline ) and the hole PNG. If you really pay attention, on every objects, you can see pixels that are not visible on my first screenshot. And I just can't figure out why this is happening Oo If you have any ideas, you are very welcome ! Thanks. PS : You can check more clearly the 2 gameboard on this two links ( look at them at 100%, display at high resolution ) : Good quality link, from Illustrator Poor quality link, from the game Second phase of tests : We display an object ( the hedgehog ) on our main menu screen to see how it looks like. The things is that it looks like he is suppose to, which means, high quality with no pixels. The hedgehog PNG is coming from an atlas : layer.addActor(hedgehog); No loss of quality with this method So we think the problem is comming from the method we are using to display it on our gameboard : blocks[9][3] = new Block(TextureUtils.hedgehog, new Vector2(9, 3)); the block is getting the size from the vector we are associating to it, but we have a loss of quality with this method.

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  • Simple Multiplayer CCG System

    - by TobiHeidi
    I am working on a cross plattform Multiplayer CCG (web, android, ios). Here are my goals in design: I want to game to be easly accessible and understandable for non CCG players within the first minute of play. a single game should be played by 2 - 4 players a once, without problems if one players drops out during play. players should make their next turn simultaneous (without waiting for other to make their turns) My current approach: each Card has a point value for four Elements. In each Turn an Element is (randomly) selected and every Player chooses 1 card out of 3. The Player choosen the card with the highest value for that element wins the Round. After 10 Rounds the players a ranked by how many rounds they won. Why does this approach seems not optimal? It seems really to easy to determin the next best turn. Your own turn is to little affected by the play style of the others. I would love the have a system where some cards are better against other cards. A bit of rock paper scissors where you have to think about what next turn the other players will make or so. But really think freely. I would love to hear ideas may it be additions or new systems to make a CCG with roughly the stated design goals. Thanks

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  • what is the simplest 3d software for unity?

    - by kdavis8
    Ive heard a lot about Daz studio, Poser, Maya, K-3d, Anim8or, Blender, and all the rest. My question is which one is the best choice in terms of simplicity and quality. price is not an issue really. I'm programming games in java for android mobile devices at the moment but i will eventually move onto larger platforms. I would like to utilize unity3d for the game programming itself and utilize a 3d modeling software just to create the game objects. I just need to know the best one to get started with from scratch or should i use a combination of multiple ones? Any insight for this would be great, thanks!

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  • How can I fix these errors with Panda3D's sample projects?

    - by lhk
    I just installed the latest Panda3D packages on a Mint 12 32-bit virtual machine. Then I downloaded and configured Eclipse and tried to run the Asteroids sample project. The window is created properly. But after rendering the scence once the game freezes. This happens with the other sample apps, too. Here's the error log: DirectStart: Starting the game. Known pipe types: glxGraphicsPipe (all display modules loaded.) :display:gsg:glgsg(warning): Occlusion queries advertised as supported by OpenGL runtime, but could not get pointers to extension functions. OpenGL Warning: glXChooseFBConfig returning NULL, due to attrib=0x6, next=0xffffffff :display:glxdisplay(warning): No suitable FBConfig contexts available; using XVisual only. depth_bits=16 color_bits=24 alpha_bits=8 stencil_bits=8 accum_bits=64 back_buffers=1 stereo=1 force_hardware=1 AL lib: pulseaudio.c:331: PulseAudio returned minreq > tlength/2; expect break up :display:gsg:glgsg(error): at 4765 of panda/src/glstuff/glGraphicsStateGuardian_src.cxx : invalid enumerant :display:gsg:glgsg(error): at 5703 of panda/src/glstuff/glGraphicsStateGuardian_src.cxx : invalid operation :display:gsg:glgsg(error): at 4654 of panda/src/glstuff/glGraphicsStateGuardian_src.cxx : invalid operation :display:gsg:glgsg(error): at 4654 of panda/src/glstuff/glGraphicsStateGuardian_src.cxx : invalid operation :display:gsg:glgsg(error): at 4765 of panda/src/glstuff/glGraphicsStateGuardian_src.cxx : invalid enumerant :display:gsg:glgsg(error): at 5703 of panda/src/glstuff/glGraphicsStateGuardian_src.cxx : invalid operation :display:gsg:glgsg(error): at 3057 of panda/src/glstuff/glGraphicsStateGuardian_src.cxx : invalid operation :display:gsg:glgsg(error): at 3057 of panda/src/glstuff/glGraphicsStateGuardian_src.cxx : invalid operation :display:gsg:glgsg(error): at 4765 of panda/src/glstuff/glGraphicsStateGuardian_src.cxx : invalid enumerant OpenGL Warning: No pincher, please call crStateSetCurrentPointers() in your SPU :display:gsg:glgsg(error): at 4765 of panda/src/glstuff/glGraphicsStateGuardian_src.cxx : invalid enumerant :display:gsg:glgsg(error): at 5703 of panda/src/glstuff/glGraphicsStateGuardian_src.cxx : invalid operation :display:gsg:glgsg(error): at 4765 of panda/src/glstuff/glGraphicsStateGuardian_src.cxx : invalid enumerant :display:gsg:glgsg(error): at 4765 of panda/src/glstuff/glGraphicsStateGuardian_src.cxx : invalid operation :display:gsg:glgsg(error): at 4765 of panda/src/glstuff/glGraphicsStateGuardian_src.cxx : invalid operation :display:gsg:glgsg(error): at 5703 of panda/src/glstuff/glGraphicsStateGuardian_src.cxx : invalid operation :display:gsg:glgsg(error): at 3661 of panda/src/glstuff/glGraphicsStateGuardian_src.cxx : invalid operation :display:gsg:glgsg(error): at 3661 of panda/src/glstuff/glGraphicsStateGuardian_src.cxx : invalid operation :display:gsg:glgsg(error): at 4765 of panda/src/glstuff/glGraphicsStateGuardian_src.cxx : invalid enumerant :display:gsg:glgsg(error): at 4765 of panda/src/glstuff/glGraphicsStateGuardian_src.cxx : invalid enumerant :display:gsg:glgsg(error): at 5703 of panda/src/glstuff/glGraphicsStateGuardian_src.cxx : invalid operation :display(error): Deactivating glxGraphicsStateGuardian. What can I do to fix the problem ?

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  • Small 3D Scene Graph

    - by Alon
    I'm looking for a 3D graphics library (not a complete game engine). Preferred a scene graph. Something small (unlike jME, XNA or Unity), that I can easily expand and change. Preferred features: Cross Platform Wrriten in Java/Scala (JOGL or LWJGL), C# (preferred OpenTK), Python or JavaScript/WebGL. Support for OpenGL is a must. Direct3D is optional. Some material system Full support for some model format with full animation support (preferred COLLADA) Level of Detail (LOD) support Lighting support Shaders, GUI, Input and Terrain/Water support are also preferred, but not required Thanks!

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  • Box2D: How to get the Exact Collision Point and ignore the collision (from 2 "ghost bodies")

    - by Moritz
    I have a very basic problem with Box2D. For a arenatype game where you can throw scriptable "missiles" at other players I decided to use Box2D for the collision detection between the players and the missiles. Players and missiles have their own circular shape with a specific size (varying). But I don´t want to use dynamic bodies because the missiles need to move themselve in any way they want to (defined in the script) and shouldnt be resolved unless the script wants it. The behavior I look for is as following (for each time step): velocity of missiles is set by the specific missile script each missile is moved according to that velocity if a collision accurs now, I want to get the exact position of impact, and now I need a mechanism to decide if the missile should just ignore the collision (for example collision between two fireballs which shouldnt interact) or take it (so they are resolved and dont overlap anymore) So is there a way in Box2D to create Ghost bodies and listen to collisions from them, then deciding if they should ignore the collision or should take them and resolve their position? I hope I was clear enough and would be happy about any help!

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  • Acceptable sound quality: stereo needed for an Android game?

    - by Thomas Calc
    I have various simple short sound effects (damage sound, dying sound, thunderbolt, fanfare, breaking) for a game that is developed for Android currently. I use OGG files: 96kbps VBR, 44.1KHz, 2 channels (that means stereo, right?). I read the other stackexchange topics about "acceptable sound quality", but they're too general, address too many things. My experience is that even with 80kbps, my effects sound OK. But I tested it on a limited number of Android devices (including a Sony Ericsson Xperia Neo and a HTC Desire HD). My questions: For mobile phones and tablets, generally, what parameters are recommended? Won't my 80kbps sounds be bad on a newer device (such as a modern tablet)? I don't hear any difference between stereo and mono (2 channels vs. 1 channel, right?), is there any noticeable difference at all for mobile phones / tablets? (in terms of the player experience) May it worth it at all? I assume that stereo sounds take much more in memory (when they're decoded to PCM), despite of the fact that the compressed OGG size is practically the same. Reacting to Roy T.'s great comment: Actually, I couldn't measure the PCM size (Android decodes OGG internally), but I thought that stereo will take more space than mono when uncompressed After throwing out one of the WAV channels in Audacity, and re-exporting it: The new WAV file size is half than before The OGG file size is practically the same as before The sound effects and game music was recorded by my friend who is an experienced hobby musician/composer, but he knows little about computers & software so he just gave me some high-quality WAV files generated via his hardware.These were stereo, but if I check them in Audacity, both channels appear to be exactly the same.Can I consider them the same (= moving to mono), or might there be some unnoticeable differences to the human eye?

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  • How do I get FEATURE_LEVEL_9_3 to work with shaders in Direct3D11?

    - by Dominic
    Currently I'm going through some tutorials and learning DX11 on a DX10 machine (though I just ordered a new DX11 compatible computer) by means of setting the D3D_FEATURE_LEVEL_ setting to 10_0 and switching the vertex and pixel shader versions in D3DX11CompileFromFile to "vs_4_0" and "ps_4_0" respectively. This works fine as I'm not using any DX11-only features yet. I'd like to make it compatible with DX9.0c, which naively I thought I could do by changing the feature level setting to 9_3 or something and taking the vertex/pixel shader versions down to 3 or 2. However, no matter what I change the vertex/pixel shader versions to, it always fails when I try to call D3DX11CompileFromFile to compile the vertex/pixel shader files when I have D3D_FEATURE_LEVEL_9_3 enabled. Maybe this is due to the the vertex/pixel shader files themselves being incompatible for the lower vertex/pixel shader versions, but I'm not expert enough to say. My shader files are listed below: Vertex shader: cbuffer MatrixBuffer { matrix worldMatrix; matrix viewMatrix; matrix projectionMatrix; }; struct VertexInputType { float4 position : POSITION; float2 tex : TEXCOORD0; float3 normal : NORMAL; }; struct PixelInputType { float4 position : SV_POSITION; float2 tex : TEXCOORD0; float3 normal : NORMAL; }; PixelInputType LightVertexShader(VertexInputType input) { PixelInputType output; // Change the position vector to be 4 units for proper matrix calculations. input.position.w = 1.0f; // Calculate the position of the vertex against the world, view, and projection matrices. output.position = mul(input.position, worldMatrix); output.position = mul(output.position, viewMatrix); output.position = mul(output.position, projectionMatrix); // Store the texture coordinates for the pixel shader. output.tex = input.tex; // Calculate the normal vector against the world matrix only. output.normal = mul(input.normal, (float3x3)worldMatrix); // Normalize the normal vector. output.normal = normalize(output.normal); return output; } Pixel Shader: Texture2D shaderTexture; SamplerState SampleType; cbuffer LightBuffer { float4 ambientColor; float4 diffuseColor; float3 lightDirection; float padding; }; struct PixelInputType { float4 position : SV_POSITION; float2 tex : TEXCOORD0; float3 normal : NORMAL; }; float4 LightPixelShader(PixelInputType input) : SV_TARGET { float4 textureColor; float3 lightDir; float lightIntensity; float4 color; // Sample the pixel color from the texture using the sampler at this texture coordinate location. textureColor = shaderTexture.Sample(SampleType, input.tex); // Set the default output color to the ambient light value for all pixels. color = ambientColor; // Invert the light direction for calculations. lightDir = -lightDirection; // Calculate the amount of light on this pixel. lightIntensity = saturate(dot(input.normal, lightDir)); if(lightIntensity > 0.0f) { // Determine the final diffuse color based on the diffuse color and the amount of light intensity. color += (diffuseColor * lightIntensity); } // Saturate the final light color. color = saturate(color); // Multiply the texture pixel and the final diffuse color to get the final pixel color result. color = color * textureColor; return color; }

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  • Ogre3d particle effect causing error in iPhone

    - by anu
    1) First I have added the Particle Folder from the OgreSDK( Contains Smoke.particle) 2) Added the Smoke.material And smoke.png and smokecolors.ong 3) After this I added the Plugin = Plugin_ParticleFX in the plugins.cfg Here is my code: #Defines plugins to load # Define plugin folder PluginFolder=./ # Define plugins Plugin=RenderSystem_GL Plugin=Plugin_ParticleFX 4) I have added the particle path in the resources.cfg( adding the particle file in this get crash ) #Resource locations to be added to the 'bootstrap' path # This also contains the minimum you need to use the Ogre example framework [Bootstrap] Zip=media/packs/SdkTrays.zip # Resource locations to be added to the default path [General] FileSystem=media/models FileSystem=media/particle FileSystem=media/materials/scripts FileSystem=media/materials/textures FileSystem=media/RTShaderLib FileSystem=media/RTShaderLib/materials Zip=media/packs/cubemap.zip Zip=media/packs/cubemapsJS.zip Zip=media/packs/skybox.zip 6) Finally I did all the settings, my code is here: mPivotNode = OgreFramework::getSingletonPtr()->m_pSceneMgr->getRootSceneNode()->createChildSceneNode(); // create a pivot node // create a child node and attach an ogre head and some smoke to it Ogre::SceneNode* headNode = mPivotNode->createChildSceneNode(Ogre::Vector3(100, 0, 0)); headNode->attachObject(OgreFramework::getSingletonPtr()->m_pSceneMgr->createEntity("Head", "ogrehead.mesh")); headNode->attachObject(OgreFramework::getSingletonPtr()->m_pSceneMgr->createParticleSystem("Smoke", "Examples/Smoke")); 7) I run this, I got the below error: An exception has occurred: OGRE EXCEPTION(2:InvalidParametersException): Cannot find requested emitter type. in ParticleSystemManager::_createEmitter at /Users/davidrogers/Documents/Ogre/ogre-v1-7/OgreMain/src/OgreParticleSystemManager.cpp (line 353) 8) Getting crash at: (void)renderOneFrame:(id)sender { if(!OgreFramework::getSingletonPtr()->isOgreToBeShutDown() && Ogre::Root::getSingletonPtr() && Ogre::Root::getSingleton().isInitialised()) { if(OgreFramework::getSingletonPtr()->m_pRenderWnd->isActive()) { mStartTime = OgreFramework::getSingletonPtr()->m_pTimer->getMillisecondsCPU(); //( getting crash here) Does anyone know what could be causing this?

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  • WoW lua: Getting quest attributes before the QUEST_DETAIL event

    - by Matt DiTrolio
    I'd like to determine the attributes of a quest (i.e., information provided by functions such as QuestIsDaily and IsQuestCompletable) before the player clicks on the quest detail. I'm trying to write an add-on that handles accepting and completing of daily quests with a single click on the NPC, but I'm running into a problem whereby I can't find out anything about a given quest unless the quest text is currently being displayed, defeating the purpose of the add-on. Other add-ons of this nature seem to be getting around this limitation by hard-coding information about quests, an approach I don't much like as it requires constant maintenance. It seems to me that this information must be available somehow, as the game itself can properly figure out which icon to display over the head of the NPC without player interaction. The only question is, are add-on authors allowed access to this information? If so, how? EDIT: What I originally left out was that the situations I'm trying to address are when: An NPC has multiple quests The quest detail is not the first thing that shows up upon right-click Otherwise, the situation is much simpler, as I have the information I need provided immediately.

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  • First-Time GLSL Shadow Mapping Problems

    - by Locke
    I'm working on building out a 2.5D engine and having massive problems getting my shadows working. I'm at a point where I'm VERY close. So, let's see a picture to see what I have: As you can see above, the image has lighting -- but the shadow map is displaying incorrectly. The shadow map is shown in the bottom left hand side of the screen as a normal 2D texture, so we can see what it looks like at any given time. If you notice, it appears that the shadows are generating backwards in the wrong direction -- I think. But the problem is a little more deep -- I'm just plotting the shadow onto the screen, which I know is wrong -- I'm ignoring the actual test to see if we NEED to show a shadow. The incoming parameters all appear to be correct -- so there has to be something wrong with my shader code somewhere. Here's what my code looks like: VERTEX: uniform mat4 LightModelViewProjectionMatrix; varying vec3 Normal; // The eye-space normal of the current vertex. varying vec4 LightCoordinate; // The texture coordinate of the light of the current vertex. varying vec3 LightDirection; // The eye-space direction of the light. void main() { Normal = normalize(gl_NormalMatrix * gl_Normal); LightDirection = normalize(gl_NormalMatrix * gl_LightSource[0].position.xyz); LightCoordinate = LightModelViewProjectionMatrix * gl_Vertex; LightCoordinate.xy = ( LightCoordinate.xy * 0.5 ) + 0.5; gl_Position = ftransform(); gl_TexCoord[0] = gl_MultiTexCoord0; } FRAGMENT: uniform sampler2D DiffuseMap; uniform sampler2D ShadowMap; varying vec3 Normal; // The eye-space normal of the current vertex. varying vec4 LightCoordinate; // The texture coordinate of the light of the current vertex. varying vec3 LightDirection; // The eye-space direction of the light. void main() { vec4 Texel = texture2D(DiffuseMap, vec2(gl_TexCoord[0])); // Directional lighting //Build ambient lighting vec4 AmbientElement = gl_LightSource[0].ambient; //Build diffuse lighting float Lambert = max(dot(Normal, LightDirection), 0.0); //max(abs(dot(Normal, LightDirection)), 0.0); vec4 DiffuseElement = ( gl_LightSource[0].diffuse * Lambert ); vec4 LightingColor = ( DiffuseElement + AmbientElement ); LightingColor.r = min(LightingColor.r, 1.0); LightingColor.g = min(LightingColor.g, 1.0); LightingColor.b = min(LightingColor.b, 1.0); LightingColor.a = min(LightingColor.a, 1.0); LightingColor *= Texel; //Everything up to this point is PERFECT // Shadow mapping // ------------------------------ vec4 ShadowCoordinate = LightCoordinate / LightCoordinate.w; float DistanceFromLight = texture2D( ShadowMap, ShadowCoordinate.st ).z; float DepthBias = 0.001; float ShadowFactor = 1.0; if( LightCoordinate.w > 0.0 ) { ShadowFactor = DistanceFromLight < ( ShadowCoordinate.z + DepthBias ) ? 0.5 : 1.0; } LightingColor.rgb *= ShadowFactor; //gl_FragColor = LightingColor; //Yes, I know this is wrong, but the line above (gl_FragColor = LightingColor;) produces the wrong effect gl_FragColor = LightingColor * texture2D( ShadowMap, ShadowCoordinate.st ); } I wanted to make sure the coordinates were correct for the shadow map -- so that's why you see it applied to the image as it is below. But the depth for each point seems to be wrong -- the shadows SHOULD be opposite (look at how the image is -- the shaded areas from normal lighting are facing the opposite direction of the shadows). Maybe my matrices are bad or something going in? They're isolated and appear to be correct -- nothing else is going in unusual. When I view from the light's view and get the MVP matrices for it, they're correct. EDIT: Added an image so you can see what happens when I do the correct command at the end of the GLSL: That's the image when the last line is just glFragColor = LightingColor; Maybe someone has some idea of what I screwed up?

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  • Algorithm for approximating sihlouette image as polygon

    - by jack
    I want to be able to analyze a texture in real time and approximate a polygon to represent a silhouette. Imagine a person standing in front of a green screen and I want to approximately trace around their outline and get a 2D polygon as the result. Are there algorithms to do this and are they fast enough to work frame-to-frame in a game? (I have found algorithms to triangulate polygons, but I am having trouble knowing what to search for that describes my goal.)

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