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

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27
votes
5answers
13k views

How to generate caves that resemble those of Minecraft?

I've been working on a 3D procedural world for a while now and am wanting to start adding cave systems. I'm currently using 2D/3D Perlin Noise for the terrain generation in combination with Marching ...
5
votes
2answers
766 views

Is there an efficient way to identify in which run-time generated room a character is, in a non-grid 3D environment? How?

Here is what I am trying to implement. I wrote a script that allows the player to place walls during run-time, in non grid-based 3D environment (walls can be diagonal with rotation increasing/...
1
vote
0answers
30 views

How to use quaternion on another referential

I'm new on Three.js and despite a mechanical background, I can't find how quaternion works: it's like it always refers on local part referential and not the global one. I've illustrated it here : ...
0
votes
1answer
1k views

Pool Game Physics General Settings in Unity

this question might have been asked before, not sure. I want to create a pool game using unity. I added the spheres as playballs and cubes as the walls. I added a rigidbody to all objects and Im ...
1
vote
1answer
69 views

Texture not working on object

I have a project that I'm having a bit of trouble with. Let me try and explain. In short, I'm trying to apply a texture to an object, but instead it is a solid color. I built a building in "Autodesk ...
1
vote
0answers
28 views

Add UVs back into a model

I built a 3D model in Autodesk 123d design, then exported it as an stl. When I convert it into an obj, however, there were no UVs in it. Is there a way I can add the UVs back into the model using a ...
6
votes
1answer
301 views

How can I convert OBJ data into CSS3D transformations?

I want to convert the data in a 3D .obj file (vertices, normals, faces) to CSS3D (width, height, rotateX,Y,Z and/or similar transforms). I found a bunch of formulae and what-not, but 3D isn't my ...
3
votes
1answer
190 views

How can use a 3D map with 2D characters (Unity)? [closed]

I tried to search something about it but I can't find any complete or well-explained tutorials about how to use a 3D map with 2D characters and items, like Ragnarok or Final Fantasy Tactics. If there ...
2
votes
1answer
55 views

Texturing curves in blender

Im making a tree in blender with the sappling add-on, i've already textured the leaves, i want to know how to texture the trunk with a bark texture. Im using cycles render. Thanks in advance. :)
1
vote
1answer
75 views

XNA Get model height in location

I am trying to make simple RTS game, and here is the problem I encountered. I need to get model height in any position. Model will not be rotated or scaled. For example, I have a terrain model like ...
2
votes
3answers
6k views

Change 3ds max mesh local origin pivot point

I'm developing a 3D videogame in C# with XNA, my problem comes when I load my model done in 3ds max, and I try to rotate a mesh of it, because the pivot point isn't exported so it takes the local ...
1
vote
0answers
63 views

Perspective correct texture mapping in iOS Metal

I tried various ways of getting the interpolation work and generate a perspective correct image, but none of the suggested ways works. My current code is: struct VertexStruct { float4 ...
4
votes
3answers
4k views

How does the Unity3D entity system work?

I saw the Java Artemis Entity Component System and thought of the entity system in Unity3D. In Artemis for example you can only add one component type to each entity and the logic is not in the ...
1
vote
1answer
158 views

How to not render what is behind object?

I am working on a 3d project using openGL. I am looking for a way to optimize my renderings. Is there a way to tell if an object is behind another object and thus not visible to not waste time ...
0
votes
0answers
74 views

3D Player/Character velocity/acceleration/friction/movement

I'm in a bit of a pickle and I'd sincerely like anybody's help. I'm working on a 3D platformer similar to Crash Bandicoot and I'm a little bit confused on how to set up the velocity and acceleration. ...
1
vote
0answers
119 views

Bird flight simulation (physics)

I tried to search something about bird-like animal flight simulation but it looks like everything is spammed with flappy bird 2D questions. I want to have in my 3D game bird-like animals with ...
1
vote
1answer
95 views

Drawing order of 2D tiles with 3D bounding volume

I'm wondering which algorithm was used to draw the sprites of the video game Commandos in the correct order. Each sprite has a 3D bounding volume (either a polygon or a cylinder), this is how the ...
1
vote
2answers
82 views

How do 3d engines create frames? [closed]

I wanted to start on a little project of making a simple 3d engine, but I can't seem to find anywhere how 3d engines actually make frames. (I don't mean the math behind the 3d projection). Do they use ...
0
votes
1answer
90 views

OpenGL, Blender and model optimization

I'm learning OpenGL and there is something I don't understand regarding model loading. Lets say I found a free .blend model of a tree. The problem is - currently in my program all models have only ...
4
votes
1answer
243 views

Mapping a 3D texture to a standard hollow-hull 3D model

I have 3D models which are typical hollow hulls. If such a model also had a 3D volumetric/voxel texture map then given a point P inside such a model, I'd like to be able to find its uvw coordinates ...
0
votes
1answer
147 views

Calculate future 3D Position of object(Unit)?

I've looked around and almost all examples is see have a velocity vector which I do not have, or at this point am unable to figure out. Im trying to find the 3D position where i can launch a trap in ...
1
vote
0answers
35 views

Vertex with too many connections in Maya

After some mesh editing in Maya I got one vertex with a lot of connections. Please help, how can I fix it? Don't even know how to google it.
0
votes
0answers
52 views

Can materials be melted using code?

Say this ball for example : These three models have been created, to then use a simple morph transition to make the ball switch from 0 to 1 then to 2, and make it look like it's melting. But is ...
-6
votes
1answer
8k views

Can you make a 3d game in eclipse java? [closed]

Hello can you make a 3d game like minecraft using java?
1
vote
0answers
34 views

Perspective projection math help?

I have points X,Y,Z and have a camera at Cx,Cy,Cz. Assuming the camera is not rotated and is facing the -Z direction and is at 0,0,0. What would the math be for projecting the X,Y,and Z values onto ...
4
votes
4answers
22k views

Starting programming in 3D with C++ [closed]

EDIT: There aren't sufficient enough tutorials for what I'm trying to do in Python, so I'm going to take my time and slowly build up my skills in C++. It's hard to trip and not land in a book of C++ ...
2
votes
3answers
181 views

How can I handle position in an entity system where position can be 2D or 3D?

I'm working on a game engine to learn how it's done (so I might better take advantage of the techniques involved and other, similar engines in the future), and I've run into a problem when handling ...
1
vote
0answers
103 views

convert 2d pt into non-affine coordinate system

Say I have a coordinate system that goes from (0,0) to (1,1). We'll call this screen_space. Within this coordinate system, I have 4 points that I would like to define another coordinate system. One ...
-1
votes
1answer
157 views

Help me choosing a 3d modelling software for this project? [closed]

I'm making a video where I want to show a few scenarios of a game in 3d: It has some objects with simple shapes - stairs, walls, barrels. So all I have to do is to model those simple objects and ...
2
votes
1answer
367 views

Ogre 3D Visibility Advice

I would like an advice about some real-time rendering optimization. I'm rendering a BSP level, by only using the mesh, textures, entities, and lightmaps, not using VIS at all. I'm trying to make my ...
0
votes
1answer
413 views

Display crosshair that is diplaying where the ship is aiming at

I am creating a 3D asteroids game. I got the bullets, asteroids, and ship all done. They work perfectly. Now I want a crosshair to display where the ship is pointing at. The crosshair will be a 2D ...
9
votes
2answers
319 views

How do I prevent raycast car wheels sliding sideways?

I've been writing a non-realistic car physics engine as a learning exercise, using this article as a reference. I have a car that correctly collides with a terrain and applies the correct suspension ...
1
vote
2answers
106 views

How do 3d engines add textures to objects?

I was wondering how 3d engines like Unity or OpenGL added textures to objects. Example: How would Unity add this texture to the side the arrow is pointing to?
2
votes
1answer
386 views

Get intersected volume of two planes in 3D

I'm working on AABB - AABB collision response and I'm having trouble figuring one part out. My situation is as follows (see image). I have a player AABB (blue) and an object which collides (brown). ...
0
votes
2answers
93 views

3d projection help?

I've been wanting to know how to do 3d projections. Can someone explain how i can use this to find the position for x and y on the 2d plane that is 600 * 600 pixels.
0
votes
1answer
192 views

three.js objects disappear

I haven't got a lot of experience with 3D Frameworks - but was playing around with three.js and came across something that (to me) is a bit odd and I wondered why this happened. I am rendering the ...
4
votes
1answer
836 views

How can I achieve a zoom-like camera effect?

I have a top down 3D camera: view = Matrix.CreateLookAt(new Vector3(0,0,20), Vector3.Zero, Vector3.Up); Now I want to achieve the effect like when I zoom in the scene and only show a section at the ...
3
votes
1answer
427 views

Clever way to do the Sonic 2 Bonus Stage effect saving memory

What would be a good way to save memory to achieve an effect like this one? http://www.youtube.com/watch?v=K89LkvL9JZ0 We're using pre-rendered 3D. I'm asking this because this naive approach of ...
0
votes
0answers
223 views

camera or position issue when render sphere with cocos2d-x 3.7

See code below bool HelloWorld::init() { [....] auto size = Director::getInstance()->getWinSize(); // setup camera auto camera = Camera::createPerspective(30, (GLfloat)size.width/...
2
votes
1answer
355 views

Triangulating a bunch of squares

I have a set of squares (pixels coming in from an image) that I want to triangulate. I narrowed my choices down to 2 possible routes: A, breaking the squares into lager rectangles, or B, ...
0
votes
0answers
110 views

Faking Perspective/Depth using 3D images converted to 2D sprites - Can't work it out!

after a lot of searching/reading/viewing old school game videos I am still unable to work out how to achieve the effect I am after. I am currently working on a 2D "overhead view" sci-fi RPG, using a ...
2
votes
1answer
60 views

Connecting 3d corridors created by procedural generation?

The 2d case is simple. You generate the segments. You find the intersections. Then you can easily outline the shape of the connecting joint in the 2d embedded graph. However, in 3d or n-d with a ...
4
votes
2answers
4k views

calculate new vertex position given a transform matrix?

How can I get the new position of my vertex given a 4x4 transform matrix or simply 9 floats (positionX, positionY, positionZ, rotationH, rotationP, rotationR, scaleX, scaleY, scaleZ)? Usually I can ...
0
votes
1answer
60 views

Do professional 3D modelers use human bases?

I tried to find an answer on google and didn't get much. I wanna know, do professional 3D modelers (Specifically in the video game industry) work off generic base human models to make their own? Or ...
5
votes
1answer
2k views

What advantages does multisampling have over supersampling?

I never really fully understood this, or found an article which explained all the steps in a friendly way. I'll start with what I do know already (which I hope do not contain misconceptions). I'm ...
19
votes
3answers
3k views

How can I create a stretchy, breakable pizza cheese material?

I want to create realistic pizza and allow user interact with it. What I want: What I created: I created model of the pizza (8 pieces) in Blender, then imported it into Unity. The piece of ...
1
vote
2answers
374 views

Is it possible to have a GUI in world space in Unity3D game?

I'm trying to make a tank shooter game for learning purpose and I want to have it viewed in first person, is there a way to make it so that the GUI seems projected onto the interior of the tank ...
1
vote
1answer
192 views

Problems with texture orientation in space

I am currently drawing texture in 3D space and have some problems with it's orientation. I'd like me textures always to be oriented with front face to user. My desirable result looks like ...
0
votes
1answer
346 views

Applying texture to a 3D object

I am trying to draw a 3D cube on the screen, using MonoGame. The cube was created in Blender and exported as an fbx file. The following is what the cube looks like in VS when opened in the editor: ...
3
votes
1answer
69 views

How do I create a half-ortho half-perspective projection matrix

I've been trying to make a formula for the projection matrix where your vertical axis is projected orthographically but your horizontal axis will have perspective to it. So the view frustum would ...