Refers to games or art assets built in a three-dimensional space, where all positions have X, Y and Z coordinates.

learn more… | top users | synonyms

2
votes
3answers
1k views

How to find the entity I'm looking at?

I am currently making a mod for Minecraft but I have come to a stop because I am lacking in some knowledge. I need to get data for the entity I am looking at, which I believe requires the use vectors, ...
4
votes
1answer
707 views

Is a game like Subway Surfers suited for 2D or 3D?

I imaginated a mobile game and now I'm getting doubts as to whether its possible for my idea to be developed in 2D. Here's a crude illustration of the game scene: It's pretty much like Subway ...
1
vote
2answers
112 views

Find closest point from an origin, in a mesh

I want to do something similar to a raycast. With a raycast, you can set an origin and a destiny, and check where the ray collides with something but only with a line. What I want to do, is given an ...
0
votes
2answers
95 views

What dimensions should you use for a perspective projection frustum?

What dimensions should you use for a perspective projection frustum? Initially I created a perspective matrix based on the width and height of the screen, with a calculated zNear value based on a ...
1
vote
1answer
148 views

Can I render some vertices as an object instead?

I am generating vertices at runtime that represent terrain. I've always drawn the vertices as triangles with GraphicsDevice.DrawUserPrimitives<VertexPositionColor>, but I'm wondering: Can ...
2
votes
1answer
93 views

How to get a Coordinates of a 3D Object in Android

How is it possible to click on an area of a 3D Model (.obj-File) for example a cube, where you can get different Events of the six sides. For Example the orange area of the picture gives me a value of ...
0
votes
0answers
93 views

How to rotate a line in 3d space?

I am trying to figure out direction vectors of the arrowheads of an arrow. Basically I'm given a normalized direction vector (u,v,w) and I need the normalized direction vectors of the its two arrow ...
0
votes
3answers
133 views

OpenGL: glRotatef cause performance drop while rotating -x and -y

I have made a rotating cube and I got some performance drops while using two glRotatef calls. So basically this code is giving me 80FPS: //code 1 GLrotate_x += 0.4f; GLrotate_y += 0.4f; ...
0
votes
0answers
52 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 ...
8
votes
4answers
615 views

Infinite 3D Cave in Unity

A friend and I are hoping to make a game in Unity in which you fly through an infinite 3D cave that can twist and wind in any direction (though obviously not to the point that the turns are impossible ...
1
vote
2answers
68 views

Can you adjust the proportions of a 3D model via scripting?

We are developing a game in Unity where the character is different ages in different levels. Would it be possible to use a single 3D model asset, and alter its proportions via scripting to achieve ...
2
votes
0answers
222 views

How can I use Cinema 4D models in Android and iOS games?

How can I convert Cinema 4D animation or models to use in games for Android and iOS SDK?What kind of format is required for developing games for these platforms? If I make a dancing character, do I ...
1
vote
2answers
114 views

How to use blender files in your own engine?

It is not trivial to use your own shader on blender, so I've created a good-looking webgl shader. Now, what do I need to use the things I made in blender on it? An obvious first idea would be to parse ...
2
votes
2answers
164 views

How can I determine the pixels covered by a transformed triangle (without drawing it)?

I have three points that form a triangle in a 3D scene. I want to apply an arbitrary rotation/translation transformation to this polygon and later check in which pixels of an image they would be ...
0
votes
1answer
48 views

How to find the right direction to plug a sword into a rig's hand after projecting it?

I've downloaded BVH animations and projected it following a book. I can now see a 3D moving rig and it looks alright. The problem is, now I want to plug a sword on the hand of the rig, but I don't ...
3
votes
1answer
131 views

Understanding and editing HDR light environments in Photoshop

I'm working with an in-development system that uses .hdr environments (equirectangular projection) to provide image-based lighting (IBL) to a 3D rendering. I'm trying to understand what range of ...
2
votes
1answer
226 views

Moving an object toward another object on sphere knowing their quaternions

I have a sphere centered in world origin. On the sphere surface I have two objects and I know their quaternions (rotation around sphere). Currently my movement works on Vector2 inputs (cannot change ...
0
votes
1answer
41 views

What is the actual formula to find the vertices of an animation frame in using a BVH file?

I've read this tutorial and tried many formulas to build the skeleton. I am able to build it without the rotations, but those break everything. This, for example, is a simplified code for one of my ...
0
votes
1answer
41 views

How to use mocaps in your game if they don't loop smoothly?

Following suggestions on IRC, I've downloaded, parsed and incorporated the Free Release of 2500 mocaps to my game. I've noticed, though, that none of those loop perfectly. It does not connect and thus ...
2
votes
1answer
261 views

3D Camera Rotation

Please, forgive me, but I need help and I've been stuck on this for a few weeks now, I'm making no progress and everywhere I go and I see a different answer, everything I try doesn't work. I've had ...
2
votes
1answer
694 views

How can I import a .3ds file into JMonkeyEngine 3?

I am trying to import an animated character body (with skeleton) from 3D Studio Max to JMonkeyEngine 3, but while we succeeded at importing some animations, we cannot seem to export the skeleton to ...
0
votes
4answers
315 views

Carve river beds into existing 3d procedural generated terrain

Ok, I've read many threads around about procedural terrain generation with rivers and roads but they suggest approaches from zero to result. I'd like to know if exists an algorithm to apply to an ...
1
vote
1answer
91 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 ...
3
votes
1answer
186 views

What is wrong with my smooth shading code?

I am having trouble getting smooth lighting to work in Java Monkey Engine. My terrain is voxel-based, with an iso-surface generated via Marching Cubes over the data field. Up until now, I have been ...
2
votes
2answers
302 views

Implementing Geometry Instancing in DirectX

I have a project that I'm doing in Managed DirectX (DX9) where I want to render lots of grass. My current method (many draw calls) is slow, but I've heard Geometry Instancing can fix that. I know ...
1
vote
1answer
76 views

Which nodes of the Collada DAE are most relevant for game object/character use?

I'm really new to game dev / D3D. And I was looking to choose an intermediary format to work with and convert to my internally used format. Collada DAE seems to be good as it can export animation too ...
24
votes
5answers
7k 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 ...
0
votes
2answers
111 views

What does a Mesh consist of?

I have seen various implementations of mesh loaders in a few open source game engines. But all of them behave meshes differently. Is there a general definition for a mesh that explains what meshes ...
0
votes
1answer
91 views

How to change colors of texture in lwjgl? [duplicate]

I have the following texture: The black pixels are characters, the background is transparent. How do I change the black pixels of the characters to another color? I use this texture as a bitmap for ...
3
votes
2answers
173 views

Optimal way to store coordinates of a random point in 3D space in a texture?

A quick question: there is a well-known approach to store 3d point in space in a texture as a distance between camera and an object (deferred rendering). But it implies that the object lies on a ray, ...
0
votes
1answer
47 views

Getting the position of a directional light w.r.t. a moving object.

I have a forward vector of my object, which is a bike, and its position, and I have a directional light direction. I would like to know where the light is with regards to the bike ...
0
votes
0answers
112 views

Calculate parameters for orthographic matrix for directional shadow mapping

I am struggling with how I can fit my scene in an orthographic projection, based on what is visible by the camera. All tutorials so far explain almost everything in perfect detail, and then for the ...
0
votes
0answers
81 views

Shadow Mapping: How to calculate Axis Aligned Bounding Box?

I am trying to implement Shadow Mapping, which is actually working with an AABB that always covers my entire scene, but (obviously) it gives very blocky graphics. So I figured I need to calculate a ...
1
vote
1answer
112 views

Most common format & good practice for 3D models for a placeholder in a PC game [closed]

I'm soon starting programming my first 3D game in OpenGL, C++, for PC. It's going to be a top-down space-based game. Early on I want to create basic placeholder 3D models for my objects, and then in ...
1
vote
1answer
134 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, ...
10
votes
3answers
2k views

How can I draw outlines around 3D models?

How can I draw outlines around 3D models? I'm referring to something like the effects in a recent Pokemon game, which appear to have a single-pixel outline around them:
2
votes
1answer
247 views

3D-Physics of a Rubber Ball (Squash)

I'm trying to simulate the environment on a Squash Court on Android with my own physics and using OpenGL for visualization. Basically, its about a rubber ball bouncing around in 3d, not just on the ...
6
votes
2answers
515 views

Triangle-triangle continuous collision detection

I am making a 3D game engine and I use continuous collision detection. I am using Sphere-Trees to cull primitive collision checks to a minimum. However, I'd like to perform continuous ...
0
votes
0answers
37 views

How do I apply a specular/reflective map in Rhinoceros?

I'm designing a 3D model using Rhinoceros 5, and after having created the UVMap with UVLayout, I've imported the .obj file back into Rhinoceros to apply materials to it. I've successfully added ...
1
vote
1answer
136 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 ...
1
vote
1answer
144 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. ...
6
votes
1answer
230 views

overlapping 3d particles not blending nicely when at the same z

I'm working on a 3d particle emitter. It's going pretty good but I'm still having a problem with triangle sorting. As you can see in the photos, there are some particles that are not blending ...
2
votes
4answers
3k views

2D camera perspective projection from 3D coordinates — HOW?

I am developing a camera for a 2D game with a top-down view that has depth. It's almost a 3D camera. Basically, every object has a Z even though it is in 2D, and similarly to parallax layers their ...
1
vote
1answer
77 views

SetFloat() in HLSL shader (effect) has no effect - variables stay at 0

I have a problem wherein I'm trying to set two simple float variables in my shader. I have a dozen other shaders in this project where it works fine, but for some reason, I've got a bug in this one ...
1
vote
1answer
139 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, ...
0
votes
1answer
318 views

LWJGL Camera Rotation Issues

I am quite new to LWJGL and OpenGL and I am trying to create an FPS camera. I had no problem with 2D stuff, so I decided to step things up and try and make some things in 3D. I have this 3D camera ...
1
vote
1answer
138 views

Draw character silhouette when not visible

I have a mesh representing my character. I want to give it a partially transparent greyish silhouette when other objects are blocking it from view of the camera. I'm using Ogre3D, and GLSL as a ...
2
votes
2answers
368 views

Canting of track in a racing game

I am trying to create a small racing game in which the track would be modeled using a BSpline curve for the path's center line and directional vectors to define the canting of the track at each point. ...
0
votes
1answer
88 views

Degenerate AABB (axis aligned bounding box), does this always intersect?

I'm studying ray-AABB intersections and I'm asking myself: what would happen if one of the dimensions of the axis aligned bounding box was degenerated? For instance: AABB_min = {1,1,1} AABB_max = ...
1
vote
4answers
601 views

What does “non commercial use” mean in terms of game assets?

I recently got an app for my iOS device called "123D Design." It is a 3D model editor. Upon creation of an account, the application tell you that "your models may not be used commercially." What ...