# Tagged Questions

3D refers to three dimensional space where coordinates are represented with X, Y and Z values.

3k views

### How to create a walkable 3D terrain

I want to make a terrain for a RPG game that I'm developing. I started modeling the surface and implementing it to my game, but now I realized that i might be doing everything wrong. So I would like ...
243 views

### How can I extrude a regular, grid-based 2D shape to 3D?

I have a list of vertex coordinates which encircle several 2D areas. Orthogonal lines only, but not necessarily convex areas... similar to PCB traces of conductive copper areas. I want to draw them ...
59 views

### How can I fade in 3D foliage smoothly?

Take a look at this picture: This is a picture of me diving down from a high height. As you can see, the world is a simple world with grass, snow, trees, etc. The problem here is the 3D foliage. If ...
66 views

### How to make the inside of a cube accessible

I have a cube, it is made up of smaller cubes each making the big cube 8x8x8. The cube is the map. The player of the game needs to be able to appraise the entire map and understand it without having ...
723 views

### LWJGL SlickUtil Texture Binding

I am making a 3D game using LWJGL and I have a texture class with static variables so that I only need to load textures once, even if I need to use them more than once. I am using Slick Util for this. ...
149 views

### GLES2 rendering performance for different iPad generations

I'm using C++/GLES2 for iPad only (no iPhone). The only device I own is an iPad2 and I do not plan to support iPad 1. Can anyone help me understand realistic goals/limits on iPad 2/3/4 in terms of ...
323 views

### problem with SCNTransaction in Scene Kit

I'm trying to move an object over a period of ten seconds from y coordinate 0 to y coordinate 10. the object is created at y coordinate 0. The problem is when the animation starts, the object pops ...
46 views

### How can I implement “quality levels” for models and textures?

I'm preparing to build a 3D game without an engine and am wanting to know how I could implement graphic detail levels for my models. To do this, are the models made in the highest quality level and ...
38 views

### 3D Level Navigation Map for a 2D Mobile Game

I am currently making a game in which I want to create a level screen map. The Map doesn’t have to do anything with the game logic and stuff but I just want to add it to include a bit of richness. ...
144 views

### Finding pitch/yaw values from lookat vector

I have a camera class that contains a position, a pitch, and a yaw (the pitch and the yaw correspond to y and x rotation values). I want to implement a lookAt function that takes a vector and the ...
153 views

### Show 3D elements on 2D background

I'll make a navigation menu in my game and had the good idee to this the enemies to start games or go to the gun store. The problem is when I look in game mode, the enemy named ZomBear in hierarchy ...
7k views

### OpenGL ES 2.0: Understanding Perspective Projection Matrix

Setting the Perspective projection matrix in Open GL (including OpenGL ES 2.0) has the following general format: glm::mat4 perspective(float fovy, float aspect, float zNear, float zFar); Notice the ...
69 views

### Creating or saving model (.fbx or .stl) file in XNA

I have drawn a 3-D Sphere in XNA with the help of vertices (without fbx file). Now I want create a .fbx file or .stl file of this 3D sphere from XNA, is there any way to do this? or how can I save ...
400 views

### Configurable Joint, linear limit range

I am working on a physics driven pressable button, but I cannot seem to tackle the minimum and maximum limits. This is the rig I have set up for the button (as it looks when pressed down). 2D view: ...
96 views

### What is the most efficient method of creating a detailed 3d tileset in a 3d game that uses a grid? [closed]

Well, the most efficient method might be with how minecraft does the terrain by using a single block for a single grid, but one thing I am concerned about is that the method minecraft uses is poorly ...
54 views

### Generate objects on playground on random location

How can I generate an object on my play ground? Note that there are some locations where the new generated item can't be placed. (Click on image to see the real size) I was following a tutorial on ...
58 views

### add random walls with an array in 3D xna 4

I'm trying to add walls to my 3D game. I created a wall entity and added model array public Walls() { modelArray = new Model[10]; } public void Initialize(ContentManager contentManager) { for (...
566 views

### UDK: Animating characters with weapons

I imported a custom character and a pistol model to UDK and both work, but the pistol doesn't appear with the animation of the pistol when I shoot or reload... Also, the character doesn't change its ...
165 views

### Supersampling - Pixel color average calculation

I am currently trying to understand Supersampling. Wikipedia says (or at least Wikipedia tells me) that multiple color samples are taken from one pixel to calculate the final result. But to my mind ...
2k views

### Prevent players from wallhacking in an online FPS?

Why do we still complain about wallhackers in multiplayer first-person shooters? Isn't it possible to perform occlusion culling for all players server-side? For example, send player xyz information ...
67 views

### Conversion from .dae to XML for 3D Models in Unity BuildR

My partner and I are trying to import .dae files from Sketchup as well as 3DS Max into Unity's BuildR extension. Collada a.k.a. .dae files have an XML-based schema so we incorrectly assumed they would ...
137 views

### Object orbiting a 3d sphere

I'm developing in libgdx java/android but not using any high-level environment like Unity. I have a sphere at [0,0,0], with a PerspectiveCamera looking at it. Through the main game loop I have ...
18 views

### Is it possible to Change the vertex format of a Model from line list to Triangle strip using DirectX

So I have a DirectX game library and using DirectX models in a game I am developing. All the models I am using have a Triangle Strip topology and thats fine as ID3DXMesh uses triangle strips for ...
24 views

### XNA 2 3D Objects Depth Convergence Error

Gah! I have a scene with 2 3D objects - a plane and a sphere; the plane sits on the xy axis with a depth if -100 and diameter of 200; the sphere diameter is 32 and sits on the xyz = 0 position; ...
134 views

### How can I render 3D frames quickly using VB?

I want to make a simple 3D engine using vb. It must be fast at creating frames obviously for a 3d game. So this code i have draws a frame at 4 fps Dim SM = DateTime.Now.Millisecond Dim ETDFrame ...
209 views

### Dual Contouring - what is it and how to use it?

I'm having trouble understanding Dual Contouring yet and I need some explanations from someone who has first hand experience. I searched all I could before writing this question. I've already read: ...
158 views

### OpenGL One Color Per VBO

Recently I have been working with OpenGL and have decided to use colors instead of textures. However, since the project I am working on is going to have a low-poly look, I want each color to stand out,...
4k views

### How can people recognize what engine a game uses?

About many games you can say "oh that's the Unreal Engine for sure", or "this was made by upgrading GTA 4", etc. We can often recognize the engine used for a game just by looking at its graphics (...
293 views

### Why there are no 3D games which allow you to move? [closed]

I've tried many 3D augmented reality games animations vs. all of them were based on this concept: your head is on one reference point, standing still, they only allow you to turn your head and look ...
85 views

### Point Light shows black box & rect (PointLight not working) - libgdx 3D

I am creating a 3d scene currently a box and rect, and trying to enable lighting. When i create a PointLight and add it to Environment everything turns to black color? all i want to do is ...
420 views

### What name (if any) applies to this particular 3D rendering technique?

Is there a name for this technique where when instead of rendering certain polygons, you just calculate a few key points and do the drawings in 2d? For instance, instead of rendering a sphere, you ...
93 views

### Rotations of a Rubik's cube

I made a Rubik's cube by arranging smaller cubes. Now I want to apply animations to it. For that I am choosing to use the Rotate class and set the angle of rotation and the axis of rotation,like this ...
62 views

### Rotation of a cube

I came across the statement "rotation about a pivot and an axis" in javafx. The axis is defined byPoint3D and the pivotX, pivotY and pivotZ are of double type. I could not form a relation about what ...
227 views

### The Power of 2D Engines vs Modern 3D Games [closed]

I'm toying around a lot with Game Maker. I really like it. GML is very simple and with its nearly object oriented design you could create anything in 2D you can think of. However there is a limit. ...
22 views

### Maya users; how can I create my own particle emitter in Maya?

(Originally posted in the Programmers Stack Exchange, but was told to ask here instead. Whoops.) Before you answer this with "well, use the built-in particle emitter", read further. For one of my ...
92 views

### Display mesh in front of camera

Im trying to display a mesh in front of the camera and FACING the camera ( I'm developing an small editor in wpf using helix3d). Pretty much something like this question I load my mesh into a ...
71 views

### World Space Normals Are Black

My world space normals appear fine for most of a mesh. However, some of the normals are black. I was wondering if anyone had any ideas why this is. This happens for any mesh, not just this sphere. ...
36 views

### Matrix stack from direction vector chain

I've implemented an IK system for a grabber arm based on several straight segments, starting from a fixed point. The IK is based on a mass-spring simulation, which eventually rests. What I'm left with ...
94 views

### Strange artifacting with textures (Pseudo 3D)

I'm using SFML to make a pseudo 3d engine (Technically not software rendered since SFML uses OpenGL) and things are going rather swimmingly, but then I tried to make another wall, the picture says ...
115 views

### How to calculate a vector for multi-axis rotations from sphere coordinates?

I'm working on a SceneKit project in iOS, trying to rotate a sphere (representing a planet) so that a point at a given longitude/latitude coordinate is facing "forward" (i.e. that point moves to the {...
107 views

### How do I get into 3D Java game development? [closed]

I have learned how to make a 2D game in Java using Eclipse and processing but I am not sure how to do 3D game development. I have tried looking up examples of how to do this but I have not found any ...
350 views

### Hierachical Z-Buffering for occlusion culling

I'm reading the Occlusion Culling section in Real-Time Rendering 3rd Edition and I couldn't understand how it works. Some questions: How does having a "Z-pyramid" contribute? Why do we need multiple ...
95 views

### Is it ok to use polymorphism as a way of “interfacing” with objects in a scene? [closed]

I'm designing a class that holds values representing a 3D scene. This includes lights, cameras, meshes, materials, etc. The way how I'm setting it up is that each "thing" has a name. A camera has a ...
151 views

### How can I optimize block rendering in an OpenGL game?

I am working on a game with blocky graphics -- similar to Minecraft. My world generation algorithm is similar to the Diamond-Square algorithm. The terrain was initially too rough and uneven, so I ...
80k views

### Easy to use cross-platform 3D engines for C++ game development? [closed]

I want to try my hand at writing a 3D game. However I don't want to start at such a low level of drawing individual triangles and writing my own 3D object loader and so on. I've heard of things like ...
57 views

### When making 3D model for building, is it better to split it or combine it? [closed]

As the title say, when making 3d model for building (example: school, office, etc). Used for FPS game so it must have detail and texture must be vary so it won't look like repeating/reused. Is it ...
86 views

### Tweening back from arbitrary 3D rotation in javascript

I'm using a 3D javascript library to rotate the vertex of a 3D object with a classic 3x3 matrix, to an arbitrary angle in the 3D space, as depicted in the image below. For example, a first ...
25 views

### Ericsson compression for normal and bump maps

how does ETC2 fares when compressing normal maps and bump/height maps? Since we are talking about using an algorithm created for visual fidelity, applied to vector and numerical data ⃰ I'm quite sure ...