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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5
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1answer
414 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 ...
2
votes
1answer
303 views

OpenGL Fast-Object Instancing Error

I have some code that loops through a set of objects and renders instances of those objects. The list of objects that needs to be rendered is stored as a std::map>, where an object of class ...
1
vote
1answer
229 views

2D map/plane with nodes overlayed that supports panning, scaling and clicking on nodes

I'm trying my hand at Android development and seem to be running into an invisible ceiling in trying to get what I want accomplished. Basically I'm trying to create an app that renders a 2D surface ...
3
votes
0answers
111 views

Converting obj data to CSS3D

I found a ton of formulae and what not, but 3D isn't my forte so I'm at a loss of what specifically to use. My goal is to convert the data in an 3D .obj file (vertices, normals, faces) to CSS3D ...
2
votes
0answers
183 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 ...
2
votes
0answers
93 views

UDK Modular construction (customisable vehicles etc)

I'd like to build an interface whereby the user can attach various components and blocks onto a vehicle, this is then saved (as object/coordinate, rotation, scale values - in database) and can be used ...
2
votes
0answers
487 views

Catmull Rom Spline - Constant Speed

Given the equations found in the answer here: Determine arc-length of a Catmull-Rom spline How would one A) Apply this to a 3D Catmull-Rom Spline, and B) write A out programmatically (for the math ...
2
votes
0answers
172 views

Portal View/Projection Matrix near plane

For RenderToTexture/Camera based portal rendering, the basics seems simple enough. However, with a free camera, most of the time it is going to be looking at such portals at an angle: Now a ...
2
votes
0answers
345 views

How can I export a model using the CAT bone system into XNA?

Has anyone successfully used the CAT bone system in 3ds Max and exported the file into XNA? If so, what was your method of doing so? There are a number of methods of doing this, apparently, but the ...
1
vote
0answers
96 views

How the Unity 3D entity system works?

I saw the Java Artemis Entity Component System and thought of the entity system in unity 3d. In artemis for example you can only add one component type to each entity and the logic is not in the ...
1
vote
0answers
86 views

Conceptual - What is the optimal way to combine steering behaviors with rigid body physics?

I am working on a simple 3D space simulator that makes use of the Bullet physics engine. The spaceships are rigid bodies that have a mass and hitbox so that they can be considered for collisions. At ...
1
vote
0answers
91 views

Shadow mapping implementation not working?

I am trying to implement Shadow Mapping in my program using Java/LWJGL/OpenGL/GLSL, but I cannot get it to work properly. Let's start off with a screenshot first, then the relevant code and lastly ...
1
vote
0answers
290 views

How can I make caves with Unity's terrain creator?

With Unity's terrain creator, I can't simply make a "hole" on the mesh. I don't know how I would make cave-like structures other than using "rock" meshes for the roof (wich will indeed look weird) ...
1
vote
0answers
115 views

How do I make a shaped fluidSurfaceActor in UDK?

I'm trying to make a fountain for my level in UDK. I've made the base of a fountain by using a Cylinder build and now I'm trying to put water in it. I want to use the fluidSurfaceActor but I notice ...
1
vote
0answers
74 views

Rotate view matrix based on touch coordinates

I'm working on an Android game where I need to rotate the camera around the origin based on the user dragging their finger. My view matrix has initial position of sitting on the negative z and facing ...
1
vote
0answers
70 views

How do I remove control points from imported curve in Maya?

When I create a path from an Illustrator file, it adds extra control points for bezier handles for each point in the AI file, even though I don't drag out the handles in Illustrator. All my points in ...
1
vote
0answers
47 views

Blender: calculation of elevation and rotation angle from plane

I have a generic plane (any location, any rotation around every axis) with its normal axis passing by the center. Then I have a generic point and I need to find the elevation and the rotation angle ...
1
vote
0answers
186 views

How can I implement collision for a “pseudo-3D” game?

I'm looking for high level implementation details, not specifics. I've worked with bounding boxes before in some 2D games, but I'm currently tackling a "2D + depth" (2.5D?) style game along the lines ...
1
vote
0answers
149 views

Moving an object (pong paddle) along the x,y axis in 3d-space with mouse/touch

First of all: Sorry, my English isn't quiet good, I'm very new in 3D and I'am using JMonkeyEngine. What I would like to do?: A 3d pong game and I want to control the paddle with the mousecursor ...
1
vote
0answers
290 views

UDK: Animating characters with weapons

I imported a custom character and a pistol model to UDK and both work, but the pistol doesn't appear with the animation of the pistol when I shoot or reload... Also, the character doesn't change its ...
1
vote
0answers
68 views

iSGL3D Occlusion Culling

I was testing a cool 3D Scene Graph Library called iSGL3D. Since I found some functions called alpha culling for displaying partly hidden objects (making the ones in front transparent). I was ...
1
vote
0answers
153 views

How to create 3d picking ray with the cursor position

I'm new here and I'm not sure how to go about doing this. I am creating an application that is supposed to use the cursor's position in the window to perform 3d picking. The tutorials I have found ...
1
vote
0answers
160 views

vector projection in 3D

p0, p2, p3, p4 are points in 3D and are connected on a straight line where p0 and p4 are fixed. How to find the normal at p2 and p3?
1
vote
0answers
339 views

How to pick a 3D object with known mouse coordinates if the camera is rotated 60 degrees?

I am making a simple game engine for a simple RTS game and would like to be able to pick a cube and move it around with the mouse coordinates. The problem is that my camera is rotated 60 degrees just ...
1
vote
0answers
44 views

How i can sign and/or group a specific set of vertices in a 3D file container like OBJ ? - in Blender

I would like to export a 3D model with each part having a name or a label if you will. For example i would like to export a model of an human body and name each part in specifics vertex groups like: ...
1
vote
0answers
469 views

Microsoft XNA code sample wont work with blender model

I downloaded this code sample and integrated it into my game http://xbox.create.msdn.com/en-US/education/catalog/sample/mesh_instancing It works with the model that they supplied, but throws and ...
1
vote
0answers
170 views

BSPs, Octrees and modern graphics hardware

I have read a lot of literature on BSPs, Octrees and like. Problem is that it is all old literature from software rendering time. Nobody describes how it is implemented today. So here is my idea how ...
1
vote
0answers
641 views

How to turn a 3d camera (in HTML5 2D Canvas)

A few years back I started experimenting with 3d in canvas. Everything went pretty well untill I had to to turn the camera, I couldn't get it done. A few days back I just happened to stumble upon ...
1
vote
0answers
401 views

3d collision detection on non flat surface

i am developing a game which needs an accurate collision detection algorithm, when a object travels down a slope which isn't flat. To be more precise i need to simulate a skier who travels down a ...
0
votes
0answers
36 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 ...
0
votes
0answers
32 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
42 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 ...
0
votes
0answers
31 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 ...
0
votes
0answers
73 views

Processing - implement a first person camera?

First off, I'm sorry if there are duplicates of this. I did an extensive Google search but was unable to find anything that made sense to me. (I am new to 3D rendering and such.) I want to make a ...
0
votes
0answers
24 views

Blendshapes workflow in mudbox

I am new to mudbox. I want to create a face with blendshapes. Currently my face has 24576 polygons on level 3. I would like to go to level 2 or level 1, ie lower than 6000, but there, detail suffers. ...
0
votes
0answers
66 views

Rendering a model with transparent or translucent uv map applied doesn't work

Before I try to make anything transparent, the model renders nicely. When I change the uv layout so that one piece of the model will be transparent, it renders horribly. This is the result with a ...
0
votes
0answers
91 views

Block picking / ray casting through 3d blocks always slightly off

I've been working on adding a line-of-sight/ray-tracing system to my 3d block-world game. I've tried several different methods and they all work fairly well. At the moment I'm using something similar ...
0
votes
0answers
212 views

How does one convert dummies to bones in 3DS Max 2010?

I have a character's .max file. To get the animations into the game I need to have bones, export a .3ds file and then load it into one of the game tools provided by the developers to tweak some stuff ...
0
votes
0answers
51 views

3D Box Collision Data Import

I'm trying to implement a collision system using oriented bounding boxes, using a center for the box, it's extents as a 3D Vector and a rotation matrix, which is all stuff I picked up online and seem ...
0
votes
0answers
194 views

JavaScript 3D space ship rotation

I am working with a fairly low-level JavaScript 3D API (not Three.js) which uses euler angles for rotation. In most cases, euler angles work quite well for doing things like aligning buildings, ...
0
votes
0answers
71 views

Triangle Clipping

I want to determine which part of a triangle is visible in a frustum in OpenGL, is there a way to get visible coordinates of triangle in the viewing frustum?
0
votes
0answers
76 views

Generate complex (non-convex) polyhedron UV mapping

I need to find an approach to the problem of generating texture maps for non-convex polyhedrons without using a design tool like Maya. Specifically, I am mapping simulation results data onto a 3D ...
0
votes
0answers
61 views

Collision detection - relative distance

Assume an object move toward a polygon board in 3D field . In order to detect whether the object collide in the board , according to the lecture notes of my Computer Graphics Course lecturer - it ...
0
votes
0answers
100 views

Handling 3D perspective for different aspect ratio

I have problem for supporting different aspect ratio in developing Mobile Game. I was developing on 2:3 screen which is iPhone 4 (Retina). When I use width and height for screen size and use fixed ...
0
votes
0answers
789 views

How to do collision detection in 3D using bounding boxes?

I am using c++ in visual studio 2010 with opengl. I am trying to make a programme that has 2 boxes that are able to be stacked on top of each other but I am having some trouble with the collision ...
0
votes
0answers
129 views

Drawing Projected Vertices/Faces In Order

I recently created a 3d engine, and have gotten to what is (as I've found) the hardest part so far. I need to sort the objects and then draw them. I've looked at sorting algorithms, but my case is ...
0
votes
0answers
357 views

3D texture coordinates for a cube

I want to use glTexImage3D with cube. what will be the texture coordinates for it? i am using GL_TEXTURE_3D as target. I tried with u v coordinates same as 2d texture coordinates with z component ...
0
votes
0answers
427 views

What is the best way to implement collision detection using Bullet physics engine and a track generated from a curve?

I am developing a small racing gam, the track is generated from a curve. As said above, the track is generated, but not infinite. The track of one level could fit with no problem in memory and will ...
0
votes
0answers
262 views

How do I keep a 3D model on the screen in OpenGL?

I'm trying to keep a 3D model on the screen by placing my glDrawElement functions inside the draw function with the declarations at the top of .cpp. When I render the model, the model attaches it self ...
-1
votes
0answers
79 views

How does sketchup do it? Previews that is

Well i've been working with HUGE models that I got from sketchup warehouse which I need to shrink some how because they are amazingly big. Decimation would work if they weren't textured. (meshlab wont ...