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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1answer
58 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* ...
2
votes
1answer
83 views

XNA 4.0 - Strange edges with multilight shader

I am generating a light, a depth and a normalmap to calculate the lightning at each pixel with multiple lights. On both rendertargets, i set the preferredMultiSampleCount parameter to 16 samples ...
0
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0answers
33 views

Separate shape in to a new object in Wings3D

I am working on a 3d model and I am having the following question: If you have one solid object and you have a specific part that you want to separate into a new object so you can move it and Unity3D ...
3
votes
2answers
204 views

OpenGL - Index buffers problem

I have a custom file format that has all the needed information for a 3D mesh (exported from 3ds Max). I've extracted the data for vertices, vertex indices and normals. I pass to OpenGL the vertex ...
0
votes
1answer
269 views

Aim at moving target (or predicting target's position at time it takes for projectile to hit it) [duplicate]

I have a game where I know the location and velocity of my target. I know my own location and the speed of my projectile. I want to determine either the location of the intersection between my ...
0
votes
0answers
68 views

Cube projection composed of smaller cubes not lining up

I am trying to make a cube projection composed of other cubes, similar to a Rubik's cube but completely static. I can get one cube to work, but when I join multiple, they don't line up. I am using ...
5
votes
1answer
429 views

apply non-hierarchial transforms to hierarchial skeleton?

I use Blender3D, but the answer might not API-exclusive. I have some matrices I need to assign to PoseBones. The resulting pose looks fine when there is no bone hierarchy (parenting) and messed up ...
4
votes
1answer
566 views

How to efficiently render a large terrain mesh?

Recently I've been stuck on a problem thinking about the best way to generate a terrain into my game. In another projects I normally used heightmaps, so all the core-work was based on the engine used, ...
0
votes
1answer
83 views

3D Background for a Verticle Shooter: Making it loop?

I know how to scroll a background using spritebatches + 2D background images, but how would I do it with a 3D model?
1
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0answers
109 views

How to make 2D sprites from 3D models [closed]

Hi I'm making a top shooter game and I'd like to what programs are the easiest/fastest to make 3D models and sprite sheets ? Here is an example of I what I want to do ...
0
votes
2answers
334 views

Converting xnb files to fbx files

All the while I can only find how to convert from FBX to XNB but not the other way around. Does anyone know how can I do that?
4
votes
1answer
1k 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
160 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
173 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
149 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
108 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
116 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
161 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
68 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
880 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
97 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
248 views

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

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
124 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
231 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
147 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
248 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
44 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
43 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
640 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
784 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
364 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
117 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
203 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
400 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
91 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 ...
25
votes
5answers
8k 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
126 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
135 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
181 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
51 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
147 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
115 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
131 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
151 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, ...
2
votes
1answer
325 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
628 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
41 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
162 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
151 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. ...