Refers to games or art assets built in a three-dimensional space, where all positions have X, Y and Z coordinates.

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154 views

Unity: Rolling a ball around a spherical planet with forces

I'm trying to make a game in Unity where the player character is a ball (a sphere), and the game world is a planet (a very large sphere) that the ball can roll around on. The ball can be rolled in any ...
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1answer
158 views

In 3D camera math, calculate what Z depth is pixel unity for a given FOV

I am working in iOS and OpenGL ES 2.0. Through trial and error I've figured out a frustum to where at a specific z depth pixels drawn are 1 to 1 with my source textures. So 1 pixel in my texture is ...
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1answer
118 views

Most common format & good practice for 3D models for a placeholder in a PC game [closed]

I'm soon starting programming my first 3D game in OpenGL, C++, for PC. It's going to be a top-down space-based game. Early on I want to create basic placeholder 3D models for my objects, and then in ...
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1answer
82 views

SetFloat() in HLSL shader (effect) has no effect - variables stay at 0

I have a problem wherein I'm trying to set two simple float variables in my shader. I have a dozen other shaders in this project where it works fine, but for some reason, I've got a bug in this one ...
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1answer
142 views

Draw character silhouette when not visible

I have a mesh representing my character. I want to give it a partially transparent greyish silhouette when other objects are blocking it from view of the camera. I'm using Ogre3D, and GLSL as a ...
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1answer
1k views

How can I make caves with Unity's terrain creator?

With Unity's terrain creator, I can't simply make a "hole" on the mesh. I don't know how I would make cave-like structures other than using "rock" meshes for the roof (wich will indeed look weird) ...
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1answer
227 views

Replace a div (with a ball picture in it) with a 3D canvas ball [closed]

I am trying to make a game where you have to keep the ball on a green platform. At this point the ball is a div with a ball image. You can move the ball over the field, all works great. See it in ...
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1answer
453 views

Correct rotation with Quaternion

I have some problems with a rotating marble. I've tried it with Matrix.CreateFromYawPitchRoll and Matrix.CreateRotation but there were some problems, I think it's due to the Gimbal lock effect. So, ...
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833 views

Moving bounding box in 3D using Libgdx

How do i go about moving a bounding box in libgdx? I want to make the bounding box capture my character and move with him. So ideally i want to be able to copy my vector 3 from my model instance and ...
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1answer
103 views

How to render models using a personalized projection matrix?

I'm creating a game with a great sprite demand. Out team is considering automatizing the sprite generation using 3D models. The problem is we have a very particular ortographic projection: We have ...
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1answer
66 views

Export object or scene with textures

Is there a way to export or publish some work to a folder so somebody else can open the .max file and does not have to reassign all the textures again? My problem is that i used lots of textures ...
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2answers
237 views

What am I missing? (Converting 2D mouse coords to 3D space)

I'm making a networked game which has a birds-eye view and I'm trying to convert the 2D mouse coordinates into 3D space. Right now I have a perfectly flat grid and it intends to remain perfectly flat, ...
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1answer
173 views

How can shears/reflections/enlargements be represented by 4x4 matrices? [closed]

I understand that 4x4 matrices can represent transformations on a 3d point (represented as x, y, z, w) Eg, a translation is [1 0 0 0] [0 1 0 0] [0 0 1 0] [x y z 1] where x, y and z are the amount ...
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1answer
556 views

How to make minecraft like world round?

everyone! I'm interested is there a game or at least example which shows how minecraft-like world turn to sphere? Idea is that there is sphere which consists from cubes like in minecraft but they ...
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1answer
170 views

How to grab textures from a texture atlas to be applied to 3d objects

Fairly basic question, but I'm having trouble on finding information on this sort of thing for beginners. I'm just trying to make cubes with different textures on the sides as a starting point. I have ...
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1answer
163 views

How can I find the location of OpenGL object after rotation?

I have a rotating object, a cube, which I rotate in OpenGL as follows: gl.glPushMatrix(); gl.glTranslatef(400.0f, 300.0f, 1300.0f); gl.glRotatef(m_x, 4.0f, 0.0f, 0.0f); gl.glRotatef(m_y, 0.0f, 4.0f, ...
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2answers
332 views

Jump without bouncing in physics engine

I am using Ogre3D as my rendering API, and OgreBullet as my physics engine. I have an test entity that when the y part of the velocity is 0 and spacebar is pressed, the velocity changes to, lets say: ...
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1answer
159 views

3D solid object in terrain

Im trying to make a solid object to stay always in the terrain level, but I am facing some problems. The terrain is not flat, I mean, it can have mountains and craters for example. I just have a ASE ...
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1answer
1k views

Best way to go with 3D dungeon crawler generation [closed]

I'm trying to prototype a little 3D dungeon crawler. That is, the same system as any rogue-like : A map with little rooms, linked by hallways. But in 3D. The world is still in blocks, but I can go ...
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1answer
135 views

3D Camera raytracing (PSM SDK) [duplicate]

I am currently creating a 3D Camera on the Playstation Mobile SDK (which is basically openGL with just a little bit of abstraction). The game I am trying to make is a 3D Tactical. That means my world ...
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1answer
179 views

Books on layout and space sequencing in game design

I'm currently looking into level design books. So far I've read two, The How's And Why's of Level Design and the Ultimate Level Design Guide. While both were useful they did not discuss layout and ...
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1answer
351 views

Need help with a complex 3d scene (using Ogre and bullet)

In my setup there is a box with a hole on one side, and a freely movable "stick" (or bar, tube). This stick can be inserted/moved through the hole into the box. This hole is exactly as wide as the ...
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1answer
86 views

How to calculate the distance between a Vector3 and a (3D polygon triangle)?

How to calculate the distance between a Vector3 and a (3D polygon triangle)? for example : " float DistanceToTrianale( Vector3 pos, Vector3 Edges1, Vector3 Edges2, Vector3 Edges3) thanks in advance
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1answer
141 views

A controlled trapezoid transformation with perspective projecton

I'm trying to implement a controlled trapezoid transformation in Adobe Flash's ActionScript using the built-in perspective projection facility. To give you an idea of how the effect looks like: ...
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1answer
116 views

Movement constrained to the faces of a cube

The basic setup I'm working with is a cube rendered in-Engine (Panda3d, although I only am looking for a generalized solution) as well as a 2d square on one face of the cube. The eventual outcome I'm ...
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1answer
114 views

How do I export Daz3D characters into an XNA format?

How do I export 3D animated characters created in Daz3D studio to a format suitable for inclusion in XNA video games? I'm looking for instructions on how to make sure weight, bones, vertices and ...
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1answer
193 views

SimpleOpenNI: Check if user hand is in specific area on image

Concerning our Microsoft Kinect project, we need some help. We control a robot with our movements tracked by the Kinect sensor. We display the depth image of the Kinect sensor on our screen, so we ...
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1answer
263 views

How can I render primitives to pixel coordinates?

I'll emphasize that I am very new to graphics programming. I've been using XNA up until now and I've been looking for a way to build simple 2D functionality with textured quads. I'm sort of starting ...
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1answer
367 views

Keeping Track of Position OpenGL

I have a sphere in my 3D world located at the origin. I have models orbiting it and I need to keep track of each models' position (x, y, x coordinates) as well as update their bounding boxes for ...
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1answer
291 views

2D map/plane with nodes overlayed that supports panning, scaling and clicking on nodes

I'm trying my hand at Android development and seem to be running into an invisible ceiling in trying to get what I want accomplished. Basically I'm trying to create an app that renders a 2D surface ...
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1answer
90 views

XNA 3D coordinates seem off

I'm going through a book, and the example it gave me seems like is should work, but when I try and implement it, it falls short. My Camera class takes three vectors in to generate View and Projection ...
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1answer
359 views

GLES2.0 3D Android game performance and multi threading the update?

I have profiled my mixed Java\C++ Android game and I got the following result: As you can see, the pink think is a C++ functions that updates the game. It does things like updating the logic but it ...
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1answer
258 views

Java game object pool management

Currently I am using arrays to handle all of my game objects in the game I am making, and I know how terrible this is for performance. My question is what is the best way to handle game objects and ...
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2answers
121 views

How do I apply a force using the object direction and speed?

I have a 3D object moving and I need to be able to apply forces to it such as gravity. In 2D, I would simply store its movement in dx and dy, but since this is in 3D, I am using a Vector3D direction ...
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1answer
705 views

Rendering a 2D Sprite in 3D space

I am currently working on a game in XNA 4.0 where I want to implement 2.75D, like in Paper Mario. I feel like it has something to do with z-buffering a Texture2D and drawing that, but I really have no ...
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1answer
407 views

Why do my pyramids fade black and then back to colour again [closed]

I have the following vertecies and norms GLfloat verts[36] = { -0.5, 0, 0.5, 0, 0, -0.5, 0.5, 0, 0.5, 0, 0, -0.5, 0.5, 0, 0.5, 0, 1, 0, -0.5, 0, 0.5, 0, 0, -0.5, 0, 1, 0, 0.5, 0, 0.5, -0.5, 0, ...
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2answers
2k views

Advanced Animation for 2d Isometric Game?

I need help with workflow suggestions for a flash game. (although the concepts would apply to other game engines, too). In a game like: Hero Academy There are several different character models each ...
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3answers
1k views

Checking for collisions on a 3D heightmap

I have a 3D heightmap drawn using OpenGL (which isn't important). It's represented by a 2D array of height data. To draw this I go through the array using each point as a vertex. Three vertices are ...
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1answer
648 views

Drawing 2D Grid in 3D View - Need help with method

I'm trying to draw a simple 2D grid for an editor, to able to navigate more clearly around the 3D space, but I can't render it: Grid2D class, creates a grid of a certain size at a location and should ...
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1answer
2k views

Blender 2.6: Changing the Resolution (Rings/Segments) of a UVSphere's

I know that it's possible to change the resolution (I mean the rings and the segments) of a UVSphere by pressing [F6] and changing some arguments. But what if I add a UVSphere to my canvas at first, ...
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1answer
491 views

Transform 3d viewport vector to 2d vector

I am playing around with 3d transformations and came along an issue. I have a 3d vector already within the viewport and need to transform it to a 2d vector. (let's say my screen is 10x10) Does that ...
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2answers
192 views

How to export deform modifier animation into a game engine?

Hi we animated a simple plane with deform modifier to give a folding cloth like effect. How do we export it from maya so that we are able to import into our game engine. Can we export them as a ...
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1answer
264 views

3D/perspective Top down shooter bullet issues

I'm developing a top-down shooter with multiple levels (ground for ground units, middle level for buildings, top level for air unity). The problem is the collision. Though I can make the collider ...
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1answer
202 views

Converting a DrawModel() using BasicEffect to one using Effect

Take this DrawModel() provided by MSDN: private void DrawModel(Model m) { Matrix[] transforms = new Matrix[m.Bones.Count]; float aspectRatio = graphics.GraphicsDevice.Viewport.Width / ...
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3answers
2k views

3D XNA Tracking Camera

I'm trying to implement a camera that tracks a 3D model in my game. I've taken a look at this MSDN article on creating a 3rd person camera, as well as experimenting on my own; but I don't get the ...
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1answer
366 views

Google Sketchup pro exporter/importer for MD5 model format?

Where can I find google sketchup pro MD5 (The doom3 model format) exporter/importer? If there isn't one what modeling program can I use to export/import MD5 models?
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1answer
1k views

using blender to generate a 3D skybox

Is it possible for me to use Blender to generate a 3D skybox? The concept is fairly simple: I create a scene that I want to display on the skybox (mountains, clouds, water, etc). Then, couldn't ...
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654 views

How to make a customizable 3D character with maya for a flash game [closed]

i'm working in a 3d flash role-playing game with alternativa 3d engine. My game requires the main character to be customizable, for example, the player must be able to add a mustache, a hat, a tie, ...
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1answer
196 views

Mesh to world vector translation

Suppose I have a world defined in typical OpenGL coords.. then the up vector defined for this space is (0,1,0). Now, if I load a model that is defined with (0,0,1) as its up vector, what are the ...
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2answers
2k views

Rotate the camera around the model in XNA?

How can I rotate my view around a model? My model has a rotation. If this rotation changed, my view should also change. The camera should be behind the model everytime. Thank you very much!