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• What is involved for a simple UDP game?

  - by acidzombie24

  I once tried to write a simple game with UDP in a week as a throwaway test. It went horribly. I threw it away early. The main problem i had was restoring the game state of all players/enemies/objects to an old state and fast forward the game to the point of time the player is playing (ie half a second before a jump. A little early or late can make the player miss the jump) Maybe this method is not the easiest way? i suspect it to be but i designed it wrong from the beginning and realized at the end of 2nd day. (so i didnt learn too much or wasted that much time) For myself and others, What is involved for a simple UDP game and how do i write one? Or how do i solve the prediction problem restoring to state properly. I'll mark this as CW bc i know there will be lots of helpful answers.

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• openfeint or gamecenter?

  - by Gajet

  which one has more potential customers, easier API, and wider feature list? i'm going to develop implement one of those two for highscore recording in my game which ones gives more advantages? and by the way I might be going to port my game to android, so if you know any thing that can help me not to rewrite my code (for example a C++ wrapper for both of them) that would mean a greate plus for openfeint in my point of veiw.

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• How to evaluate a user against optimal performance?

  - by Alex K

  I have trouble coming up with a system of assigning a rating to player's performance. Well, technically there is is a trivial rating system, but I don't like it because it would mean assigning negative scores, which I think most players will be discouraged by. The problem is that I only know the ideal number of actions to get the desired result. The worst case is infinite number of actions, so there is no obvious scale. The trivial way I referred to above is to take score = (#optimal-moves - #players-moves), with ideal score being zero. However, psychologically people like big numbers. No one wants to win by getting a mark of 0. I wonder if there is a system that someone else has come up with before to solve this problem? Essentially I wish to score the players based on: How close they've come to the ideal solution. Different challenges will have different optimal number of actions, so the scoring system needs to take that into account, e.g. Challenge 1 - max 10 points, Challenge 2 - max 20 points. I don't mind giving the players negative scores if they've performed exceptionally badly, I just don't want all scores to be <=0

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• Setting up collision using a tilemap and cocos2d

  - by James

  I'm building my first platformer using cocos2d and a tilemap. I'm having trouble coming up with a decent way of determining if the character is colliding with an object. More specifically, in which direction is the character colliding with an object. Following the tutorial here, I have made a separate "meta" layer of collidable tiles. The problem is that unless the character is in the tile, you can't detect the collision. Also, there's no way of telling WHERE the collision is occurring. The best solution would be one that could tell me if a character is up against a wall, or walking on top of a platform. However, I can't seem to figure out a good technique for this.

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• Implementing a multilanguage AI contest platform

  - by Alejandro Piad

  This is a followup to this question. To sum: I'm implementing an AI contest site, where each user may submit several AI implementations for different games. Think about Google AI Challenge but instead of just having a big event once a year, I would like it more on a league fashion, with all virtual players playing with each other every some close period of time. I want to support as many programming languages as possible. I've seen that contest sites (like codeforces) ask you to submit a source code and interact through stdin and stdout. The first question is: what is the best way of supporting multiple languages? As I see it, I can either ask people to upload some binary/script, and interact either through stdin/*stdout*, or sockets, or the file system; or ask people to submit source code, and wrap it with whatever is necessary for the interaction. I would like to skip the need to compile the code by myself (in the server, I mean), but I am willing to do it if its the "best" choice. I need to comunicate virtual players with each other, or even better, with some intermediary arbiter. The second question is regarding security. If I'm going to be running user code in my server, I want to ensure strict security conditions, like no file system access, no networking, etc. Otherwise it would be a safe heaven for hackers. I will be implementing the engine/arbiter in .NET. I would like to support at least C#, C++, Java and Python for the user's implementations. I'm willing to write interfaces for each of these languages to simplify the user interaction with the system. Thanks in advance.

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• How to implement efficient Fog of War?

  - by Cambrano

  I've asked a question how to implement Fog Of War(FOW) with shaders. Well I've got this working. I use the vertex color to identify the alpha of a single vertex. I guess the most of you know what the FOW of Age of Empires was like, anyway I'll shortly explain it: You have a map. Everything is unexplored(solid black / 100% transparency) at the beginning. When your NPC's / other game units explore the world (by moving around mostly) they unshadow the map. That means. Everything in a specific radius (viewrange) around a NPC is visible (0%transparency). Anything that is out of viewrange but already explored is visible but shadowed (50% transparency). So yeah, AoE had relatively huge maps. Requirements was something around 100mhz etc. So it should be relatively easy to implement something to solve this problem - actually. Okay. I'm currently adding planes above my world and set the color per vertex. Why do I use many planes ? Unity has a vertex limit of 65.000 per mesh. According to the size of my tiles and the size of my map I need more than one plane. So I actually need a lot of planes. This is obviously pita for my FPS. Well so my question is, what are simple (in sense of performance) techniques to implement a FOW shader? Okay some simplified code what I'm doin so far: // Setup for (int x = 0; x < (Map.Dimension/planeSize); x++) { for (int z = 0; z < (Map.Dimension/planeSize); z++) { CreateMeshAt(x*planeSize, 3, z*planeSize) } } // Explore (is called from NPCs when walking for example) for (int x = ((int) from.x - radius); x < from.x + radius; x ++) { for (int z = ((int) from.z - radius); z < from.z + radius; z ++) { if (from.Distance(x, 1, z) > radius) continue; _transparency[x/tileSize, z/tileSize] = 0.5f; } } // Update foreach(GameObject plane in planes){ foreach(Vector3 vertex in vertices){ Vector3 worldPos = GetWorldPos(vertex); vertex.Color = new Color(0,0,0, _transparency[worldPos.x/tileSize, worldPos.z/tileSize]); } } My shader just sets the transparency of the vertex now, which comes from the vertex color channel

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• How do you turn a cube into a sphere?

  - by Tom Dalling

  I'm trying to make a quad sphere based on an article, which shows results like this: I can generate a cube correctly: But when I convert all the points according to this formula (from the page linked above): x = x * sqrtf(1.0 - (y*y/2.0) - (z*z/2.0) + (y*y*z*z/3.0)); y = y * sqrtf(1.0 - (z*z/2.0) - (x*x/2.0) + (z*z*x*x/3.0)); z = z * sqrtf(1.0 - (x*x/2.0) - (y*y/2.0) + (x*x*y*y/3.0)); My sphere looks like this: As you can see, the edges of the cube still poke out too far. The cube ranges from -1 to +1 on all axes, like the article says. Any ideas what is wrong?

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• My first animation - Using SDL.NET C#

  - by Mark

  Hi all! I'm trying to animate a player object in my 2D grid when the user clicks somewhere in the screen. I got the following 4 variables: oX (Current player position X) oY (Current player position Y) dX (Destination X) dY (Destination Y) How can I make sure the player moves in a straight line to the new XY coordinates. The way I'm doing it now is really awfull and causes the player to first move along x axis, and finally in y axis. Can someone give me some guidance with the involved math cause I'm really not sure on how to accomplish this. Thank you for your time. Kind regards, Mark Update: It's working now but whats the right way to check if the current positions are equal to the target position? private static void MovePlayer(double x2, double y2, int duration) { double hX = x2 - m_PlayerPosition.X; double hY = y2 - m_PlayerPosition.Y; double Length = Math.Sqrt(Math.Pow(hX, 2) + Math.Pow(hY, 2)); hX = hX / Length; hY = hY / Length; while (m_PlayerPosition.X != Convert.ToInt32(x2) || m_PlayerPosition.Y != Convert.ToInt32(y2)) { m_PlayerPosition.X += Convert.ToInt32(hX * 1); m_PlayerPosition.Y += Convert.ToInt32(hY * 1); UpdatePlayerLocation(); } }

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• Technique to have screen independent grid based puzzle with sprite animation

  - by Yan Cheng CHEOK

  Hello all, let's say I have a fixed size grid puzzle game (8 x 10). I will be using sprites animation, when the "pieces" in the puzzle is moving from one grid to another grid. I was wondering, what is the technique to have this game being implemented as screen resolution independent. Here is what I plan to do. 1) The data structure coordinate will be represented using double, with 1.0 as max value. // Puzzle grid of 8 x 10 Environment { double width = 0.8; double height = 1.0; } // Location of Sprite at coordinate (1, 1) Sprite { double posX = 0.1; double posY = 0.1; double width = 0.1; double height = 0.1; } // scale = PYSICAL_SCREEN_SIZE drawBitmap ( sprite_image, sprite_image_rect, new Rect(sprite.posX * Scale, sprite.posY * Scale, (sprite.posX + sprite.width) * Scale, (sprite.posY + sprite.Height) * Scale), paint ); 2) A large size sprite image will be used (128x128). As sprite image shall look fine if we scale from large size down to small size, but not vice versa. Besides the above mentioned technique, is there any other consideration I had missed out?

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• Ragdoll continuous movement

  - by Siddharth

  I have created a ragdoll for my game but the problem I found was that the ragdoll joints are not perfectly implemented so they are continuously moving. Ragdoll does not stand at fix place. I here paste my work for that and suggest some guidance about that so that it can stand on fix place. chest = new Chest(pX, pY, gameObject.getmChestTextureRegion(), gameObject); head = new Head(pX, pY - 16, gameObject.getmHeadTextureRegion(), gameObject); leftHand = new Hand(pX - 6, pY + 6, gameObject.getmHandTextureRegion() .clone(), gameObject); rightHand = new Hand(pX + 12, pY + 6, gameObject .getmHandTextureRegion().clone(), gameObject); rightHand.setFlippedHorizontal(true); leftLeg = new Leg(pX, pY + 18, gameObject.getmLegTextureRegion() .clone(), gameObject); rightLeg = new Leg(pX + 7, pY + 18, gameObject.getmLegTextureRegion() .clone(), gameObject); rightLeg.setFlippedHorizontal(true); gameObject.getmScene().registerTouchArea(chest); gameObject.getmScene().attachChild(chest); gameObject.getmScene().registerTouchArea(head); gameObject.getmScene().attachChild(head); gameObject.getmScene().registerTouchArea(leftHand); gameObject.getmScene().attachChild(leftHand); gameObject.getmScene().registerTouchArea(rightHand); gameObject.getmScene().attachChild(rightHand); gameObject.getmScene().registerTouchArea(leftLeg); gameObject.getmScene().attachChild(leftLeg); gameObject.getmScene().registerTouchArea(rightLeg); gameObject.getmScene().attachChild(rightLeg); // head revolute joint revoluteJointDef = new RevoluteJointDef(); revoluteJointDef.enableLimit = true; revoluteJointDef.initialize(head.getHeadBody(), chest.getChestBody(), chest.getChestBody().getWorldCenter()); revoluteJointDef.localAnchorA.set(0f, 0f); revoluteJointDef.localAnchorB.set(0f, -0.5f); revoluteJointDef.lowerAngle = (float) (0f / (180 / Math.PI)); revoluteJointDef.upperAngle = (float) (0f / (180 / Math.PI)); headRevoluteJoint = (RevoluteJoint) gameObject.getmPhysicsWorld() .createJoint(revoluteJointDef); // // left leg revolute joint revoluteJointDef.initialize(leftLeg.getLegBody(), chest.getChestBody(), chest.getChestBody().getWorldCenter()); revoluteJointDef.localAnchorA.set(0f, 0f); revoluteJointDef.localAnchorB.set(-0.15f, 0.75f); revoluteJointDef.lowerAngle = (float) (0f / (180 / Math.PI)); revoluteJointDef.upperAngle = (float) (0f / (180 / Math.PI)); leftLegRevoluteJoint = (RevoluteJoint) gameObject.getmPhysicsWorld() .createJoint(revoluteJointDef); // right leg revolute joint revoluteJointDef.initialize(rightLeg.getLegBody(), chest.getChestBody(), chest.getChestBody().getWorldCenter()); revoluteJointDef.localAnchorA.set(0f, 0f); revoluteJointDef.localAnchorB.set(0.15f, 0.75f); revoluteJointDef.lowerAngle = (float) (0f / (180 / Math.PI)); revoluteJointDef.upperAngle = (float) (0f / (180 / Math.PI)); rightLegRevoluteJoint = (RevoluteJoint) gameObject.getmPhysicsWorld() .createJoint(revoluteJointDef); // left hand revolute joint revoluteJointDef.initialize(leftHand.getHandBody(), chest.getChestBody(), chest.getChestBody().getWorldCenter()); revoluteJointDef.localAnchorA.set(0f, 0f); revoluteJointDef.localAnchorB.set(-0.25f, 0.1f); revoluteJointDef.lowerAngle = (float) (0f / (180 / Math.PI)); revoluteJointDef.upperAngle = (float) (0f / (180 / Math.PI)); leftHandRevoluteJoint = (RevoluteJoint) gameObject.getmPhysicsWorld() .createJoint(revoluteJointDef); // right hand revolute joint revoluteJointDef.initialize(rightHand.getHandBody(), chest.getChestBody(), chest.getChestBody().getWorldCenter()); revoluteJointDef.localAnchorA.set(0f, 0f); revoluteJointDef.localAnchorB.set(0.25f, 0.1f); revoluteJointDef.lowerAngle = (float) (0f / (180 / Math.PI)); revoluteJointDef.upperAngle = (float) (0f / (180 / Math.PI)); rightHandRevoluteJoint = (RevoluteJoint) gameObject.getmPhysicsWorld() .createJoint(revoluteJointDef);

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• How does Blizzard manage to support Mac OS and Windows in their games?

  - by begray

  I've always thought, that using Direct X for Windows was the most powerful, easy and modern method to create games with modern graphics nowdays. And knowing, that it's only Windows I thinks it's pretty difficult to make something similar on other platforms (Mac OS to be exact). But Blizzard somehow managed to deliver Starcraft 2 for Mac OS, and Diablo 3 will be available for Mac too. So what I'm interested in is information about: what technologies are they using for their game engines? are they using one engine for both games (Starcraft 2 and Diablo 3)? Or develop custom for each game? what are they paying in terms of time and money for Mac OS support? Thanks

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• Why do the order of uniforms gets changed by the compiler?

  - by Aybe

  I have the following shader, everything works fine when setting the value of one of the matrices but I've discovered that getting a value back is incorrect for View and Projection, they are in reverse order. #version 430 precision highp float; layout (location = 0) uniform mat4 Model; layout (location = 1) uniform mat4 View; layout (location = 2) uniform mat4 Projection; layout (location = 0) in vec3 in_position; layout (location = 1) in vec4 in_color; out vec4 out_color; void main(void) { gl_Position = Projection * View * Model * vec4(in_position, 1.0); out_color = in_color; } When querying their location they are effectively reversed, I did a small test by renaming View to Piew which puts it before Projection if sorted alphabetically and the order is correct. Now if I do remove layout (location = ...) from the uniforms, the problem disappears !? I am starting to think that this is a driver bug as explained in the wiki. Do you know why the order of the uniforms is changed whenever the shader is compiled ? (using an AMD HD7850)

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• Retrieving model position after applying modeltransforms in XNA

  - by Glen Dekker

  For this method that the goingBeyond XNA tutorial provides, it would be really convenient if I could retrieve the new position of the model after I apply all the transforms to the mesh. I have edited the method a little for what I need. Does anyone know a way I can do this? public void DrawModel( Camera camera ) { Matrix scaleY = Matrix.CreateScale(new Vector3(1, 2, 1)); Matrix temp = Matrix.CreateScale(100f) * scaleY * rotationMatrix * translationMatrix * Matrix.CreateRotationY(MathHelper.Pi / 6) * translationMatrix2; Matrix[] modelTransforms = new Matrix[model.Bones.Count]; model.CopyAbsoluteBoneTransformsTo(modelTransforms); if (camera.getDistanceFromPlayer(position+position1) > 3000) return; foreach (ModelMesh mesh in model.Meshes) { foreach (BasicEffect effect in mesh.Effects) { effect.EnableDefaultLighting(); effect.World = modelTransforms[mesh.ParentBone.Index] * temp * worldMatrix; effect.View = camera.viewMatrix; effect.Projection = camera.projectionMatrix; } mesh.Draw(); } }

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• How to change the sprite colors

  - by Mr_Qqn

  In my rhythm game, I have a note object which can be of different colors depending on the note chart. I could use a sprite sheet with all the different color variations I use, but I would prefer to parametrize this. (For information, a note sprite is compound with one main color, for example a red note has only red, light red and dark red.) So, how to change the colors of a sprite basing on a new color ? I'm working with opengl, but any algorithm or math explanation will do. :) Thanks

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• Adobe Air turn based multiplayer Game, sockets vs http bandwidth

  - by Arin Aivazian

  I am developing an Adobe Air multiplayer game for iPad. It is turn based and not realtime. It is like checkers game. I want to use a client server model. I have found 2 options to connect to server so far: socket connection and http requests My question is: Is the bandwidth requirement for socket connection vs http requests different? I need the game to work with very low speed internet connections

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• How to run the pixel shader effcet??

  - by Yashwinder

  Below stated is the code for my pixel shader which I am rendering after the vertex shader. I have set the wordViewProjection matrix in my program but I don't know to set the progress variable i.e in my pixel shader file which will make the image displayed by the help of a quad to give out transition effect. Here is the code for my pixel shader program::: As my pixel shader is giving a static effect and now I want to use it to give some effect. So for this I have to add a progress variable in my pixel shader and initialize to the Constant table function i.e constantTable.SetValue(D3DDevice,"progress",progress ); I am having the problem in using this function for progress in my program. Anybody know how to set this variable in my program. And my new pixel Shader code is float progress : register(C0); sampler2D implicitInput : register(s0); sampler2D oldInput : register(s1); struct VS_OUTPUT { float4 Position : POSITION; float4 Color : COLOR0; float2 UV : TEXCOORD 0; }; float4 Blinds(float2 uv) { if(frac(uv.y * 5) < progress) { return tex2D(implicitInput, uv); } else { return tex2D(oldInput, uv); } } // Pixel Shader { return Blinds(input.UV); }

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• How can I pass an array of floats to the fragment shader using textures?

  - by James

  I want to map out a 2D array of depth elements for the fragment shader to use to check depth against to create shadows. I want to be able to copy a float array into the GPU, but using large uniform arrays causes segfaults in openGL so that is not an option. I tried texturing but the best i got was to use GL_DEPTH_COMPONENT glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, 512, 512, 0, GL_DEPTH_COMPONENT, GL_FLOAT, smap); Which doesn't work because that stores depth components (0.0 - 1.0) which I don't want because I have no idea how to calculate them using the depth value produced by the light sources MVP matrix multiplied by the coordinate of each vertex. Is there any way to store and access large 2D arrays of floats in openGL?

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• What algorithm to use to fill a KenKen square board with cages?

  - by JimmyBoh

  I am working on recreating KenKen, a popular math puzzle involving a blank grid that is divided into "cages". Each cage is just a collection of adjacent squares and has a clue which is generally a number and an operand, shown below: What type of algorithm would be best to fill the square with cages? Assume the maximum number of cells per cage would be 3 and the board is 4x4 in size, like in the example above.

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• Migration from XNA to SharpDX

  - by Wouter

  My fear is that XNA has reached the end of the road. To keep up with the latest technology a shift to another game framework might be needed. We have many games in a large codebase, all based on XNA. My question is, how much work would it be to migrate to SharpDX and are there other possibilities? Our code base mainly uses basic 3D rendering and the SpriteBatch, no fancy shader stuff. Update: I should have mentioned we only use 2.5D, we have a simple engine that builds textured quads to render text and animated sprites. Also for sound we use XACT (what else..) with some effects.

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• Adding interactive graphical elements to text-based browser game with HTML5

  - by st9

  I'm re-writing an old virtual world/browser based game. It is text and HTML form based with some static graphics. The client is HTML and JS. I want to introduce some interactive graphical elements to certain parts of the game, for example a 'customise character' page, with hooks to server side and local data storage. I want to use HTML5/JS, what is the best approach to designing the web-site? For example could I use Boilerplate and then embed these interactive elements in the page? Thanks

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• Fog shader camera problem

  - by MaT

  I have some difficulties with my vertex-fragment fog shader in Unity. I have a good visual result but the problem is that the gradient is based on the camera's position, it moves as the camera moves. I don't know how to fix it. Here is the shader code. struct v2f { float4 pos : SV_POSITION; float4 grabUV : TEXCOORD0; float2 uv_depth : TEXCOORD1; float4 interpolatedRay : TEXCOORD2; float4 screenPos : TEXCOORD3; }; v2f vert(appdata_base v) { v2f o; o.pos = mul(UNITY_MATRIX_MVP, v.vertex); o.uv_depth = v.texcoord.xy; o.grabUV = ComputeGrabScreenPos(o.pos); half index = v.vertex.z; o.screenPos = ComputeScreenPos(o.pos); o.interpolatedRay = mul(UNITY_MATRIX_MV, v.vertex); return o; } sampler2D _GrabTexture; float4 frag(v2f IN) : COLOR { float3 uv = UNITY_PROJ_COORD(IN.grabUV); float dpth = UNITY_SAMPLE_DEPTH(tex2Dproj(_CameraDepthTexture, uv)); dpth = LinearEyeDepth(dpth); float4 wsPos = (IN.screenPos + dpth * IN.interpolatedRay); // Here is the problem but how to fix it float fogVert = max(0.0, (wsPos.y - _Depth) * (_DepthScale * 0.1f)); fogVert *= fogVert; fogVert = (exp (-fogVert)); return fogVert; } Thanks a lot !

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• How do I calculate the boundary of the game window after transforming the view?

  - by Cypher

  My Camera class handles zoom, rotation, and of course panning. It's invoked through SpriteBatch.Begin, like so many other XNA 2D camera classes. It calculates the view Matrix like so: public Matrix GetViewMatrix() { return Matrix.Identity * Matrix.CreateTranslation(new Vector3(-this.Spatial.Position, 0.0f)) * Matrix.CreateTranslation(-( this.viewport.Width / 2 ), -( this.viewport.Height / 2 ), 0.0f) * Matrix.CreateRotationZ(this.Rotation) * Matrix.CreateScale(this.Scale, this.Scale, 1.0f) * Matrix.CreateTranslation(this.viewport.Width * 0.5f, this.viewport.Height * 0.5f, 0.0f); } I was having a minor issue with performance, which after doing some profiling, led me to apply a culling feature to my rendering system. It used to, before I implemented the camera's zoom feature, simply grab the camera's boundaries and cull any game objects that did not intersect with the camera. However, after giving the camera the ability to zoom, that no longer works. The reason why is visible in the screenshot below. The navy blue rectangle represents the camera's boundaries when zoomed out all the way (Camera.Scale = 0.5f). So, when zoomed out, game objects are culled before they reach the boundaries of the window. The camera's width and height are determined by the Viewport properties of the same name (maybe this is my mistake? I wasn't expecting the camera to "resize" like this). What I'm trying to calculate is a Rectangle that defines the boundaries of the screen, as indicated by my awesome blue arrows, even after the camera is rotated, scaled, or panned. Here is how I've more recently found out how not to do it: public Rectangle CullingRegion { get { Rectangle region = Rectangle.Empty; Vector2 size = this.Spatial.Size; size *= 1 / this.Scale; Vector2 position = this.Spatial.Position; position = Vector2.Transform(position, this.Inverse); region.X = (int)position.X; region.Y = (int)position.Y; region.Width = (int)size.X; region.Height = (int)size.Y; return region; } } It seems to calculate the right size, but when I render this region, it moves around which will obviously cause problems. It needs to be "static", so to speak. It's also obscenely slow, which causes more of a problem than it solves. What am I missing?

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• Why doesn't my GameMaker step event work?

  - by exceltior

  So I want to make some kind of floor that which the player when walks in gets his movement reduced but im having thousand of different issues implementing this since it doesnt appear to do anything ... So i have tried different way: 1 - I have tried Step Event which had the following script: if keyboard_check(ord('A')) { player.x = -5; } if keyboard_check(ord('D')) { player.x = -5; } if keyboard_check(ord('W')) { player.x = -5; } if keyboard_check(ord('S')) { player.x = -5; } 2 - I have tried a Collision Event with the same code 3- I have tried a Step event with collision detection on a script None of these options seem to work at all ... Can you help me?

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• List of bounding boxes?

  - by Christian Frantz

  When I create a bounding box for each object in my chunk, would it be better to store them in a list? List<BoundingBox> cubeBoundingBox Or can I just use a single variable? BoundingBox cubeBoundingBox The bounding boxes will be used for all types of things so they will be moving around. In any case, I'd be adding it to a method that gets called 2500+ times for each chunk, so either I have a giant list of them or 2500+ individual boxes. Is there any advantage to using one or the other?

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• Texturing a mesh generated from voxel data

  - by Minja

  I have implemented the Marching Cubes algorithm to display an isosurface based on voxel data. Currently, it is displayed with triplanar texturing. I'm working with unity, so I have a material with the triplanar shader attached. Now, the whole isosurface is rendered using this material. And thats my problem: I want the texture to represent the voxel data. I'm storing a material value for every point in the grid, and based on this value, I want the texture of the isosurface to change. Sadly, I have no clue how to do this. So if the voxel is sand, I want sand to be displayed; if it's stone, then there should be stone. Right now, everything is displayed as sand. Thanks in advance!

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