# Tagged Questions

Geometric representations of objects in 3 dimensions. 3D-meshes are made up of a collection of triangles or other polygons, forming volumes and surfaces. They are commonly used for visual representations on computer screens.

520 views

### Wavefront mesh: determine which face a point belongs to?

I have a 3D mesh Wavefront .obj file. Is there any algorithm that takes an arbitrary point coordinates as input and determines which face of the mesh that point belongs to ?? The mesh is rendered on ...
516 views

### Software rendering 3d triangles in the proper order

I'm implementing a basic 3d rendering engine in software (for education purposes, please don't mention to use an API). When I project a triangle from 3d to 2d coordinates, I draw the triangle. However,...
868 views

### XNA Per-Polygon Collision Check

I'm working on a project in XNA for WP7 with a low-poly environment, my problem is I need to setup a working per-polygon collision check between 2 or more 3d meshes. I've checked tons of tutorials ...
703 views

### matrix to transform unit cube to space defined by 8 arbitrary points

I asked a question relating to similar to this already, but I think this is a clearer objective of what Im trying to achieve.. or whether its possible at all! Im trying to find a transformation (...
895 views

### Rendering multiple squares fast?

so I'm doing my first steps with openGL development on android and I'm kinda stuck at some serious performance issues... What I'm trying to do is render a whole grid of single colored squares on to ...
1k views

### Algorithm to simplify building/structural meshes

I am looking for an algorithm to simplify the meshes of buildings or similar structures. EDIT: I had made a comment that Hoppe's algorithm tends to make meshes more and more spherical with ...
205 views

### The need to reduce mesh count

In Panda3d, I load a model and place 10000 references to it in the scene-graph. It runs at (say) 2Hz. I load a 3d model containing 10000 copies of that exact same object, and it runs at (say) 60Hz. ...
2k views

### Animating a 3D model with XNA

How do I animate a biped model from 3ds max using XNA framework or not necessarily the biped model, it could be any 3D model but how can I code the animation?
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My test FBX mesh is a cube. From what I surmise, it seems that the cube is on the extreme end of this issue, but I believe that the same issue would be able to occur in any mesh: Each vertex has 3 ...
514 views

### Why doesn't light continuous on my model?

I created a basic textured cube model with Blender to practice modeling, and then I imported it into Unity. After I put up some lighting it looks pretty ugly. The light is not continuous on a row of ...
744 views

### Models with more than one mesh in JMonkeyEngine

I’m a new jmonkey engine developer and I’m beginning to import models. I tried to import simple models and no problems appeared, but when I export some obj models having more than one mesh in the ...
345 views

### Game Asset Size Over Time

The size (in bytes) of games have been growing over time. There are probably many factors contributing to this: trailer/cut scene videos being bundled with the game, more and higher-quality audio, ...
292 views

### Triangle Strips of Tetraheron

I am confused about the triangle strip representation of closed mesh .The vertex buffer for triangle strip representation of the a figure is shown below: A(0,1) B(0,0) C(1,1) D(1,0)E(2,1) vertex ...
9k views

### Where to attach global scripts in Unity?

As far as Iknow in Unity, every script must be attached to an object. But what is the case with global scripts? For example in a tetris-like game to which object should I attach the element spawner ...
1k views

### Converting many faces to single mesh and reduce poly-count in Blender

I'm not so familiar with 3D modelling, and I'm stuck on a simple task in Blender. I have a fairly complex model that's been imported as a .DAE file from SketchUp. This model is composed of many ...
50k views

### How to merge two objects in Blender

What I've Done I created a Cube object with Subdivision Surface modifier in order to model a spehere. I created a cuboid object looking like a angled, longish baton. What I Want to Do I want to ...
1k views

### Textureing subdivided Icosahedron in XNA, seam problem

*Look below for the updated source code* I have started to to make some different types of objects and create them by code in XNA. Right now I have finished the code for creating a Icosahedron. And ...
618 views

### Blender to 3ds max to cal3d format

There are quite a few questions on cal3d but they are old and don't apply anymore. In Blender(must be 2.49a for python script to work!!!): I have a scene with 7 meshes, 1 armature, 10 bones. I tried ...
229 views

### What uses are there for multiple UV maps on a model?

I'm trying to think of some reasons why there might be more than one UV map on a mesh. Usually I just unwrap the model, and the same UV map works for both the diffuse color texture, the bump map ...
2k views

### Creating mesh at run-time

I've a set of voxel data and I want to create a mesh out of it at run-time. I've looked into MeshBuilder and MeshHelper but I haven't found anything useful or a good tutorial how to use them. Can ...
176 views

### Why are my triangles not being drawn in the color I define?

I render a simple mash structure with Tao (don't think this is relevant) using DisplayList. Following code appears between int displayList = Gl.glGenLists(1); Gl.glNewList(displayList, Gl....
13k views

### Blender: How to merge two faces?

Initial Situation Using Blender 2.6, I often come to the same problematic setting: There are two faces on one straight line. My Aim I want to keep just one of the two selected faces, which you ...
785 views

### Missing triangles in model

I am having an issue where triangles in a model aren't being shown. The left is wireframe, the right is the finished image. For some reason a bunch of the triangles aren't being shown. The project ...
364 views

### Blender 2.6: How to Merge the Pros of Meshes and Surfaces

there are two interesting kinds of objects: Meshes and Surfaces. Each of them offers very cool features. Object Type Specific Features Nice Features of Surfaces: (for example) They're as scalable ...
4k views

### Finding if a point is inside of a mesh (Point-in-polyhedron)

How can I find if a point (Vector3) is inside of a mesh? Would this work for both concave and convex objects? I read somewhere that if you raycast in both directions of every axis (X, -X, Y, -Y, Z, -Z)...
20k views

### Algorithm for creating spheres?

Does anyone have an algorithm for creating a sphere proceduraly with la amount of latitude lines, lo amount of longitude lines, and a radius of r? I need it to work with Unity, so the vertex positions ...
8k views

### Drawing a dynamic indicator for a field of view

My goal is to draw a dynamic indicator for a cube, which represents the field of view. The ideal indicator would look the same as in Metal Gear Solid(the blue ones): From what I have gathered, I ...
2k views

### Strange mesh import problem with Assimp and OpenGL

Using the assimp library for importing 3D data into an OpenGL application. I get some strange problems regarding indexing of the vertices: If I use the following code for importing vertex indices: ...
461 views

### Create edges in Blender

I've worked with 3DS Max in Uni and am trying to learn Blender. My problem is I know a lot of simple techniques from 3DS max that I'm having trouble translating into Blender. So my question is: ...
585 views

### Problem rendering a Wavefront mesh, nothing displays(VBO)

I'm having a problem with displaying my wavefront obj file using VBO's My fps counter slows down like there is something being drawn but I cannot see anything. Is it a problem with my loader? Or maybe ...
7k views

### Scaling Model in XNA, keep position

I am trying to create a little fun 3D game in XNA, but I am having some problems with scaling my models. I use models from random sites, so my battleship is for an example 10 times larger than my ...
446 views

### Procedural mesh generation from raytracer

I'm interested in applying the following technique: Define game objects using a object definition DSL similar to what you would use for a raytracer (e.g. POVRay) Use a specialised raytracer to ...
210 views

### What is a simple deformer in which vertices deform linearly with control points?

In my project I want to deform a complex mesh, using a simpler 'proxy' mesh. In effect, each vertex of the proxy/collision mesh will be a control point/bone, which should deform the vertices of the ...
354 views

### Realtime rendering using a ray tracing engine

I want to render an object that has a mesh with one million hexagonal elements(100 * 100 * 100). Lights, shadows and textures is not important and each element has a solid color. and finally, the ...
235 views

### 3D Huge mesh rendering

I am writing a program, that as input, I have a huge (10^6 elements) 3d mesh (with hexagonal shaped elements), and I want to realtime render it, but not as real-time as a game. It just can show the ...
968 views

### Is there a standard way to store 3D meshes to easily communicate between libraries?

In a 3D game lots of different systems need to know about geometry data, however the only way they seem to be able to agree to on in representing it by an array of triangles. Can anyone recommend a ...
6k views

### Procedural Mesh: UV mapping

I made a procedural mesh and now I want to apply a texture to it. The problem is, I cannot get it to stick the way I want it to. The idea is to have the texture painted only once over the whole mesh,...
1k views

### Static Meshes vs 3D models

What is the difference between static meshes and regular 3D models. I am very new to game development, and I am using UDK (Unreal Development Kit).
744 views

### Problem when animating MD5 model (GPU Skinning)

I'm trying to implement a GPU skinning version of the md5mesh.js by @tojiro (demo with CPU skinning) in WebGL (live demo of the project here, use WASD to move the camera around). The main concept is ...
4k views

### How does an AAA graphical workflow look like?

So this is how I understand it: An artist models the thing in Zbrush or Mudbox. It now has 10+ million polygon. He exports it in Zbrush as a normal map + low poly model. (this works?) The model now ...
1k views

### free asset library for panda3d [closed]

my game with panda3d is slowly taking form. It's still a mere testcase but I'd like to improve its visual. Since the assets from my previous projects don't fit this game I've used placeholders for the ...
2k views

### Creating a basic character skeleton from code

I'd like to have a procedural system that uses a string of data to create a 3d creature. The way I've thought to do this is to use the code to generate a simple creature skeleton (I'll get to the skin ...
302 views

### Are there established conventions for naming “directions” (width,height) in 3D?

I want to create a 3D game world where the players can modify the environment. I would like to bring it to the point where a power-user could even create "game objects" inside the application using ...
3k views

### How can I create my mesh so that textures applied to it are NOT rotated 90 degrees in Unity 3D?

I'm trying a really simple test in Unity 3D. I want to render a texture on the simplest plane possible. So, I've created a two-triangle plane in Blender, then imported it into Unity. From there, I ...
696 views

### real time mesh deformation with regards to environmental damage

I would like to be able to add this feature to my tech demo. At the moment bullets hit the walls and little pieces fly out of them, as well as decals appearing on the walls. However, now computing ...
2k views

### how large should a map be in blender

I'm learning blender and am wondering what size(blender units) I should be making my characters and maps. should i consider 1 blender unit as 1 inch, foot, meter or does it not not matter?
1k views

### What is the best way to store meshes or 3d models in a class

I am wondering, how I should store my mesh into memory after loading it from whatever file. I have Questions floating in my head: Should a mesh could have sub meshes or does the 3d model just store ...
4k views

### How can I select and scale an edge loop within Blender?

I'm a web developer looking into game development as a hobby for fun and the challenge. I have just started learning blender 2.6. I am currently doing a tutorial at http://cgcookie.com/blender/2010/12/...