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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159 views

Using circles to create a sphere

I've been working on creating spheres in a 3D space recently, and have successfully created cylinders. I've just run into a little problem. For some reason, my "Spheres" end up looking like very thick ...
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1answer
642 views

What are the basics of 3D triangle/quad sorting?

I am really curious how any 3D engine or even the GPU sorts triangles and quads. Are they basically taking a "center" point of a particular triangle/quad/poly and then calculate a distance from a ...
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438 views

Special Effects in a 3d game

I am creating a 3d game ( a car racing game) using opengl ES. i know the rendering concept and also using a physics engine for all the physics stuff. All modeling is done using 3d modeling softwares. ...
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1answer
3k views

How to go orthographic instead of perspective view in XNA with CreateOrthographicOffCenter?

Using these view and projection values: var eye = new Vector3(0, 0, 10f); var view = Matrix.CreateLookAt(eye, Vector3.Zero, Vector3.Up); var projection = ...
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2answers
4k views

XNA: draw a sprite in 3d, is that possible?

since now I always used sprited to draw in 2D: spriteBatch.Draw(myTexture, rectangle, color); (I suppose the texture is binded internally to 2 triangles and then scaled.) Now, I'm porting my game ...
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873 views

Model not rendering correctly XNA

Basically i am trying to render a model yet it seems to draw polygons that should be behind something, in front of it. So i end up seeing some faces that should be behind something, totally covering ...
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1answer
19k views

Convert Autocad DWG to OBJ, FBX or similar

I know this is only partially game development related, but couldnt find another place to ask. How can i convert an autocad dwg or dxf file to a more 'common' format like OBJ, FBX, 3DS, etc. ? i ...
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867 views

LWJGL Rendering a 2D Object at a Certain Position On-Screen

Okay, so in LWJGL, how can I render a 2D object (maybe for like a menu, or meter that shows up on screen during the game), and have control over size and position on screen? So I can tell it what ...
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5k views

Translate object in world space usings it's local rotation

I'm using Three.JS to render some objects. I'm struggling with some very simple object rendering and translation. The scenario is that I spawn an object at 0,0,0 in world space with 0,0,0 rotation. ...
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147 views

My .FBX model is not picking the .TGA texture file

I'm at a complete loss. An artist has sent me a 3D model so I can test it in Unity. This is exactly what I got: - Guy.fbx - Guy_DIF_512.tga Alright. So I move the folder into the Unity ...
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1answer
107 views

How to rotate an object so that it is aligned with a vector?

I have the following Scenario: Two moving objects (A and B in the picture) need to appear "connected" by a third one (C in the picture). I set the position of the connecting object C as "halfway" ...
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179 views

model view projection multiplication order

I'm debugging a lighting problem where the camera position is effecting the diffused lighting component on my 3d model. In researching my problem I went back and am reading over all the how to ...
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316 views

Mouse click movement

I need to make realistic human movement (3D) using mouse click. Get mouse click point using Raycast. Smoothly Slerp to LookRotation. Move transform.forward. Everything works fine, except I have ...
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1answer
513 views

Opentk LookAt() and 'eye' argument rotating

I'm trying to create rotating camera, which looks down by 45 deegre like this: However my code for rotating eye vector is not working properly and I achieve vertical rotation, when it should be ...
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3answers
166 views

Mathematics behind Phong shading and additive blending

I'm confused about the mathematics behind additive blending used in conjunction with Phong shading. Intuitively, it seems like you would need to use a floating-point framebuffer and some sort of ...
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1answer
85 views

Align tetrahedrons

I'm currently generating tetrahedron meshes in Unity When a player clicks the side of a mesh, a new one spawns aligned with it, like this. I'm not sure how nor can I find any information on ...
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2answers
433 views

Surface creation algorithm using points cloud

I am looking for a realtime algorithm to create a 2D mesh using points. But I am quite confused. It seems that Delaunay triangulation can help me create mesh using point clouds, but Meta-balls seems ...
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1answer
190 views

Should all primitives be GL_TRIANGLES in order to create large, unified batches?

Optimizing modern OpenGL relies on aggressive batching, which is done by calls like glMultiDrawElementsIndirect. Although glMultiDrawElementsIndirect can render a large number of different meshes, it ...
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1answer
457 views

Tile textures on 3D models. HLSL shader code maybe?

I'm making a game in C# with XNA. I'm now applying textures to models. However if I change the scale of the model, the texture stretches with it. How can I make the texture tile over the model instead ...
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1answer
61 views

How do I set which side of a mesh is visible?

I know little about 3D game development, but I'm trying to understand how to set what side of a mesh has the visible face. I am using Wild Magic 5 and my object looks like this: VertexFormat* ...
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1answer
178 views

3D model editor manipulators

I'm trying to make my own 3D model editor to better learn 3D programming. I have my translate manipulators and I'm trying to calculate the Vector2 that the mouse would have to move in order to move an ...
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1answer
166 views

DirectX Bullet Tracer Effect

I'm wondering if anyone knows some common and efficient ways to do a fast tracer for an instant bullet. I've seen people speak on forums of using primitive lines with DirectX, but I doubt this ...
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1answer
193 views

Where is the error in my perspective projection implementation?

My question is not really a game development question, but since it's based on 3D programming, I thought it would fit best here. I've got a line made out of Point3D objects where the value of x, y, ...
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1answer
195 views

Ice sliding physics

I am trying to implement ice sliding physics on a plane for my game. There are a lot of N64 games that implemented them perfectly well, like Banjo-Kazooie, Super Mario 64, Zelda: OoT and MM, etc. ...
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1answer
254 views

Creating a vehicle using a physics engine [closed]

What is the theory behind creating a generic 3D vehicle in a physics engine? What I would like to know is what parts should I stick together to make the vehicle, how they parts should stick together, ...
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1answer
109 views

Normal map causing certain faces to get shaded

I added a normal map to a MR arch & design material in Max 2012. I have a specular in the reflection color slot and a diffuse in the diffuse slot. As i increase the intensity of the normal map i ...
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1answer
1k views

Is there a way to create a sky-sphere instead of a skybox in Unity3D?

In a 3D game, how can I make a sky background seen at the horizon? I tried adding a texture to the skybox but since it's a box it looks horrible. When I'm not using a texture it's not notable that it ...
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1answer
5k views

How to opitimize Shadows in Unity 3D

I made the shadow of Solider in my game using Unity pro shadows feature. http://docs.unity3d.com/Documentation/Manual/Shadows.html The performance of my game becomes very slow after adding these ...
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1answer
128 views

Automatically zoom out the camera to show all players

I am building a game in XNA that takes place in a rectangular arena. The game is multiplayer and each player may go where they like within the arena. The camera is a perspective camera that looks ...
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2answers
233 views

General visual effects to meshes/entities

I am trying to add some visual effects to some entities, meshes, or whatever you want to call them as they are looking pretty dull in my game right now. What I want to achieve is this: ...
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1answer
137 views

“retro”-look in 3d-XNA-game

In my XNA-4.0-game (which somehow is a bit like MineCraft), I have got some big cubes with small textures (16x16px) on it. By default, XNA just scales them up smooth so there aren't any hard borders. ...
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1answer
2k views

how to make cross platform 3d games using modern opengl? [closed]

How to create games that run on windows, Linux, mac os x, android, ios, wp8 etc.... using c/c++, opengl 3 or 4 and opengl es 2.0. any tutorials or videos on how to create cross-platform 3d games.
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1answer
1k views

JMonkeyEngine in Eclipse

I wanted to try the JMonkey engine, so I downloaded the JMonkey sdk, but I don't want to work in the JME IDE, I would rather like to work with Eclipse, since I already started a game project there, ...
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81 views

How can I fix this transparency problem when my data is viewed from a certain angle?

using Microsoft.DirectX.Direct3D; using Microsoft.DirectX; I render a 3D data by setting device.RenderState.AlphaBlendEnable = true Now my top view looks like below, the outer surface layer ...
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1answer
215 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 ...
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1answer
258 views

Whats the point of this LPDIRECT3DDEVICE9 reference?

I'm going through the DirectX 9 MSDN documentation Which lead me to something rather peculiar, do you need a class reference in DirectX 9? Can someone tell me what the point of the class ...
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1answer
350 views

Rubik's cube array rotation

I'm about to make a 3D Rubik's cube based game in Flash AS3 and Away3d. I don't really know how to manage the 2D arrays of the Rubik's cube. For example, how do I rotate the corresponding arrays if ...
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1answer
935 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 ...
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1answer
89 views

Is there a good comprehensive walk-through of deriving the math for 3D model rendering that starts from scratch? [closed]

I'd like to fully understand the math of rendering a 3D model in a 2D perspective. I always find tutorials that are in terms of the APIs used to do the math for you, and not the math itself. I'd ...
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2answers
387 views

Accumulating rotations for camera

It seems there are three ways to store a camera's rotation: in angles, view matrix or quaternion. I was using euler angles since when I used a matrix it had a tendency to accumulate rounding errors ...
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1answer
226 views

how to move the camera behind a model with the same angle? in XNA

I'm having difficulty moving my camera behind an object in a 3D world. I'd like to have two view modes: for fps (first person). external view behind the character (third person). I've searched the ...
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2answers
410 views

XNA 4.0, Combining model draw calls

I have the following problem: The levels in my game are made up of a Large Quantity of small Models and because of that I am experiencing frame rate problems. I already did some research and came to ...
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1answer
437 views

3D space game development [closed]

I want to develop a 3D game (sci-fi type with spaceships) which can be played on multiplayer mode and by multiplayer i mean around 10 players for start as it will be a personal testing project and ...
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2answers
2k views

Wrong faces culled in OpenGL when drawing a rectangular prism

I'm trying to learn opengl. I did some code for building a rectangular prism. I don't want to draw back faces so I used glCullFace(GL_BACK), glEnable(GL_CULL_FACE);. But I keep getting back faces also ...
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1answer
275 views

Viewport.Unproject - Checking if a model intersects a large sprite

Let's say I have a sprite, drawn like this: spriteBatch.Draw(levelCannons[i].texture, levelCannons[i].position, null, alpha, levelCannons[i].rotation, Vector2.Zero, scale, SpriteEffects.None, 0); ...
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1answer
392 views

Engine and level of detail for maze / labyrinth / dungeon scene?

My question is similar to these: Algorithm for generating a 2d maze To scene graph or not to scene graph? I.e. in this case should I use jme3 or some other engine (I heard unreal offers a free ...
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1answer
484 views

UVW Unwrap multiple quads on same texture space automatically

I've been looking around the web for the answer to this question, but to no avail. So here I go. I'm looking for a way to automatically map several quads on the same texture space (for example (0,0) ...
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3answers
505 views

Missing z-axis rotation for transforming between two vectors

I'm trying to rotate a cube so that it's facing up, but am getting hung up on the final implementation details. It now reliably will rotate the x,y axis to the correct side, but the z-axis is never ...
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1answer
443 views

help a 2D image onto a 3D cube

I am just diving into the Stage3D APIs for Flash Player 11. I am trying to figure out a simple way to display isometric 2D content that gets blitted from a sprite sheet onto a 3D cube. The idea ...
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2answers
345 views

Intuitive way to handle dragging outside the Arc Ball?

So I'm writing a game (or toy, rather), which involves manipulating a 3d object with the mouse. I'm trying to get the most intuitive control that I can. I've implemented the "Arc Ball" mouse control. ...