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.

learn more… | top users | synonyms

2
votes
2answers
227 views

Angle between two planes

I have two triangles in 3d space which share 1 edge and I would like to determine if the angle between their normal vectors is "uphill" or "downhill". In other words, if you set one flat, would the ...
4
votes
1answer
2k views

Quads Vs Triangles

I'm curious to know which is better for games? Quads or Triangles? Wouldn't quads be better for rendering performances and smoothing out tessellation?
2
votes
0answers
55 views

Blender: Setting additional properties per face [closed]

I wish to use Blender to model level for 3D game. Level is a set of Meshes. I have to set special (additional) properties per face (triangle). These properties are like integer number or vector or ...
1
vote
1answer
685 views

How to generate AABB, OBB & Sphere from polygon soup

How can I generate AABB, OOBB and Sphere from a polygon soup, where the bounding volumes are defined as follows: AABB should be specified by min(x,y,z) max(x,y,z) OOBB should be specified by ...
0
votes
1answer
421 views

Problems with 3D Array for Voxel Data

I'm trying to implement a voxel engine in C++ using OpenGL, and I've been working on the rendering of the world. In order to render, I have a 3D array of uint16's that hold that id of the block at the ...
3
votes
1answer
82 views

Armature rest matrix - why does this exist?

I'm not sure I have a clear idea on what purpose the rest matrix/bindpose is supposed to serve in skeleton animation. If it is supposed to transform a bone into the rest pose and the mesh itself is ...
0
votes
2answers
1k views

Unity Mesh and Collider not aligned on rotation

I have a GameObject with a mesh and a collider. When I rotate the object the mesh and the colider do not act the same way and when the GameObject is rotate 65 degrees on the z axis the mesh and the ...
3
votes
1answer
408 views

What's the proper way to set up a texture atlas in Unity 3D?

I am using Unity3d (free) to make a game with user-defined content (i.e., load in a map, it'll build the level for you). Everything is working as expected, except for the rendering. Note the ...
2
votes
1answer
143 views

Light is not spreading evenly

I am using SunBurn for lights and rendering, when i create sceneobject in code, effect is like this see in this light is in the middle so sceneobject in middle is well lit and as we go to corner ...
1
vote
5answers
582 views

Drawing transparent and opaque 3D objects. How do I preventing z-fighting?

I am using a transparent weighted average algorithm to draw my transparent objects. The transparent object is drawn with the following notable render states (the rest are default XNA values): ...
4
votes
2answers
1k views

Building triangle adjacency data

Given a list of triangle indices, how exactly does one go about converting that to a list of indices with adjacency for a geometry shader? Note that we're strictly talking about indices here - ...
2
votes
1answer
562 views

How check if an arbitrary given mesh is a single closed mesh?

I'm building a space game where it is allowed for the player to insert his own mesh to be his spaceship. The problem I'm facing is that a ship must be a Polygon Mesh. The player will then be able to ...
3
votes
1answer
170 views

How to calculate where specular highlights converge with an anisotropic shader?

If you look at a rendering with an anisotropic shader applied you will notice that there are special spots on the 3D surface/mesh where the lights seems to converge, a point where a given vector ...
3
votes
1answer
1k views

How do I create a manual object with colors for each vertex?

How do I create a shaded manual object with colours for each vertex? Eg if ogreObj is the Ogre::ManualObject : ogreObj->begin("BaseWhiteNoLighting", Ogre::RenderOperation::OT_TRIANGLE_LIST); ...
1
vote
1answer
224 views

Android Object get Jagged at the border

I am new to OpenGL ES 1 in android. My 3D Model border getting Jagged. Please help me to look like a smooth border instead of jagged. Screenshot : http://i.stack.imgur.com/1Gq83.png private class ...
5
votes
1answer
552 views

Why are my animated objects (from Blender) always playing at the global origin in Unity?

I created and animated a sledgehammer in Blender 2.67b using an armature. The sledgehammer has one animation (created using the Action Editor) called "Idle". I parented the imported sledgehammer to an ...
12
votes
3answers
880 views

What caused “falling out of the world” and what fixed it?

A lot of early 3D games had the problem where you'd be trundling merrily along and suddenly everything was black, with an island of what looked like the hollow facade shell of the scene you'd been ...
2
votes
2answers
198 views

.md5mesh normals are not smooth

I'm currently working on a project that requires me to load .md5mesh format and draw it. Following this link I've managed to load the mesh into the engine successfully, but a problem arises when ...
1
vote
1answer
413 views

How to generate texture coordinates for a rectangle?

I've got a function which generates geometry data for a rectangle. So far I've got the vertex, indices and the normals nailed, but I have no idea how to generate the texture coordinates - so far I've ...
2
votes
1answer
852 views

XNA 4.0: Blender .fbx File Won't Display 3D Model

So I followed the basic 3D model display tutorial found here: http://msdn.microsoft.com/en-us/library/bb197293%28v=xnagamestudio.31%29.aspx And while I know this is for XNA 3.1, I can still get the ...
7
votes
2answers
3k views

Voxel Face Crawling (Mesh simplification, possibly using greedy)

Edit: This is just for my own learning experience, it is NOT for performance reasons that I ask this question. This is in regards to a Minecraft-like terrain engine. I store blocks in chunks ...
2
votes
1answer
824 views

Lightmapping & runtime combine children

Is it possible to have lightmapping on runtime generated combine children in Unity? It is possible to bake combined meshes when they are done in the editor, but the .apk/.ipa size increases too much. ...
3
votes
1answer
648 views

How can I divide a 3D mesh into small pieces?

I'm considering a manufacturing game. A player should assemble parts of an object in given time. The object will be a 3D mesh model. I want to automatically split the 3D mesh into many small pieces to ...
3
votes
1answer
256 views

Why do some .obj files have no newlines?

I'm working on a game engine and just started with mesh loading. I started with the format .obj. I ran into this problem: The guide I'm following gave me a couple of .obj files to try and they all ...
6
votes
1answer
865 views

How can I render an .stl file in XNA or Monogame?

How should I go about rendering a .stl file as a 3d model in XNA? The .stl file contains a bunch of triangles that add up to a solid mesh. I have already figured out how to read the contained data. ...
0
votes
1answer
101 views

How to know if a model is composed of a group of models?

I've downloaded a model, and try to ungroup the model and learn how this model was made. However, the big model in the image below can not be ungrouped anymore. I feel that this model is composed of ...
1
vote
0answers
82 views

3D Model Loading in DirectX 11 [duplicate]

At the moment I am trying to implement fbx model loading in my DirectX 11 code. This is old code I had create for use with DirectX 9 and I'm simply trying to bring it back up to date. Since I first ...
-2
votes
1answer
325 views

Programmatically creating a 3d mesh in XNA

Surprise! Another question related to Minecraft. Anyways: Rather than drawing thousands of blocks each frame, I remember reading somewhere that Minecraft breaks the map into 16x16x256 chunks, and ...
1
vote
2answers
627 views

How to correctly create bullet rigid from custom .mesh in Ogre?

Being new to 3d programming and bullet physics in particular, I am wondering how a 3d model or the mesh generated out of it effects the accuracy of bullet physics simulation. I have written a ...
-1
votes
1answer
151 views

Looking for pre-broken models/meshes for use in a unity project [closed]

Hi guys for my final year project I'm working on comparing the difference between a few destruction techniques for a game environment, based on looks and computational efficiency. I intend on ...
0
votes
2answers
1k views

Irrlicht rendering basic OBJ

I have been trying to render a "room" with some basic functions and I found some "bugs". So at first I have made a "room" out of 6 planes in blender and gave each of them a diffrent color. ...
1
vote
1answer
799 views

How would one render dynamic vertices in OpenGL ES 2.0 like in a 3D modeling program?

Is there an easy way to re-render dynamic vertices in OpenGL ES 2.0 so that one could, for example, make a modeling program? I understand how to make a dynamic vertex array, but what I don't ...
5
votes
3answers
2k views

UDK or Unity Dynamic Runtime Mesh Boolean subtraction (or alternative) [closed]

I'm new to 3D game dev and was wondering if anyone could help me out. I'm planning to use UDK and would like to have deformable items in the world. So a projectile strikes a target, and a dent or ...
3
votes
1answer
371 views

Stitching meshes together

I have a voxel engine that generates a mesh per chunk and now I want my meshes to be 1 mesh, but if I create them as a single mesh I kind of lose the benefit of chunking the data in the first place. ...
7
votes
1answer
372 views

Path Finding for an Arena based map in 3D using NavMesh

I have a 3D arena map (consider a small island surrounded by water on all sides) for a multiplayer Tank fight game. The moveable areas are marked using a Navigation Mesh made by the Arena designer. ...
0
votes
1answer
368 views

Unable to manipulate Imported Object menu (Unity)

I've imported a model, but for some reason I can't edit any settings under the Imported Object menu, such as the Mesh Filter or the Mesh Renderer. See this: http://i.stack.imgur.com/t7ZYR.png for a ...
3
votes
2answers
921 views

XNA 3d model mesh.draw() throws TextureCoordinate0 is missing error

I've downloaded a bunch of 3d models from turbosquid.com. The majority of the one's I've downloaded are simply .fbx files. When I load the model into my game and run it, the following error is thrown ...
4
votes
2answers
3k views

Displaying (3D) objects' name above them

The Elder Scrolls: Morrowind has a rather interesting way to display each focused objects' name. It's all a bit fuzzy in my memory right now, but the most important part I remember perfectly: the ...
1
vote
1answer
994 views

Are interleaved vertex data formats better than non-interleaved formats?

I have been reading up on data formatting for 3D objects so that I can render my meshes as fast as possible in OpenGL. I am quite new to OpenGL so bear with me. The format for interleaving your ...
2
votes
1answer
78 views

Swapping limbs between meshes

I'm trying to achieve what was done in the game impossible creatures. I will have a skeleton to which I will apply different meshes to i.e. torso mesh, leg mesh, etc. I would also like these meshes to ...
4
votes
1answer
485 views

Are models on 3D warehouse free of copyright? [closed]

Are models on sketchup's 3D warehouse free to use for personal or commercial work? I haven't been able to find copyright information on the site.
1
vote
0answers
245 views

Swap limbs of a skinned mesh

If I have a model, such as a robot, I am able to swap its limb meshes out and replace them with other robot limb meshes by merely removing the limb mesh from the skeleton and attaching the new one to ...
1
vote
2answers
222 views

Finding Surface of Inner Volume mesh

I am working on the generation of Hexahedral mesh generation using octree based discretization. I have a volume mesh (Hexahedral), using isomorphism I need to project the outermost surface vertices of ...
0
votes
1answer
165 views

Strange rendering in Direct3D 10 [closed]

I'm writing an application which renders graphics on the screen. The application can switch between Direct3D9 and Direct3D10 graphics modules (I wrote DLLs that wrap both D3D9 and D3D10). When trying ...
2
votes
1answer
436 views

Perlin Noise for game terrain; math error (unexpected breaks in terrain (3D grid))

So, I'm learning how to generate terrain using Perlin Noise, and I came across this code: http://stackoverflow.com/questions/4753055/perlin-noise-generation-for-terrain/4753123#4753123 PerlinNoise.h ...
2
votes
1answer
500 views

Finding holes in mesh

I have a mesh that has holes. I found a paper, An Automatic Hole-Filling Algorithm for Polygon Meshes It details an algorithm that uses a k-d tree for finding holes (from a manifold triangle mesh). ...
3
votes
1answer
270 views

How to approach skinning a snake made of cubes and is it right method for snake 3d game

I'm making a 3d snake game clone for studies and prettly much got everything to work, I have a 3d ground object surrounded by walls, and a snake head piece (cube). when you start the game 2 additional ...
3
votes
2answers
2k views

Creating a custom binary format for 3D meshes

I've seen people saying it's better and faster to use a custom binary format for your 3D models, based on your needs, instead of using exchange formats. But, I'd like to know how to create a basic ...
1
vote
1answer
144 views

Blender 2.6: Move Mesh to X Coordinate of Another Mesh

An example: There are two planes A and B with the following median points: ( X | Y | Z ) M_A ( 3 | 2 | 2 ) M_B ( 6 | 1 | 1 ) Now I want to move the plane A on the X-axis to the X coordinate ...
3
votes
3answers
2k views

DirectX 9 - model rendering from .obj files issues

Well I can clearly tell that what rendered is close to what I wanted, but there seems to be a few problems. The .obj files contained values like "f", "v", "vt". Image Of Problem: ...