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

0
votes
0answers
73 views

Legality on BSP maps and creating them using Open Source Editor Tools

I saw somewhere when you use BSP Quake Map Format with Id Software Official Tools that you need to acquire licensing when you release your game commercially with a map created with Id's own editor ...
7
votes
3answers
423 views

Sort Polygons in order - not working?

I'm fairly new to programming in a 3d world. I'm trying to create a canvas where all the objects are drawn in order of furthest-to-closest and from bottom to top - so they don't overlap each other, ...
0
votes
1answer
108 views

Perspective Projection - Drawing Lines

So I sort of understand the math behind projecting 3d points onto a 2d plane. It's just some simple dividing and multiplication of distances. However I can't seem to wrap my head around projecting ...
0
votes
1answer
89 views

Intersperse 2D with 3D opengl

I want to be able to draw 3D objects as well as 2D objects in an openGL environment. Normally, I would draw my 3D stuff, disable the depth buffer and depth mask, then draw my 2D stuff. However, this ...
0
votes
0answers
110 views

Using modo for Unity level modelling?

Is anyone using modo for modelling level meshes for Unity here? I'd like to know how to set up modo so that I can use the grid in modo and it will reflect 1 meter. I've set in modo preferences Unit ...
10
votes
8answers
2k views

Physics-perfect (or somewhere near) 3d sound engine [closed]

I'm new to game programming, although I have some years of experience in console/web development. My problem is not so much that I can't find what I'm looking for, it's just that I don't have the ...
0
votes
1answer
144 views

OpenGL Viewport inside of a Viewport

I'm creating a labyrinth in opengl, and I'm trying to create a minimap. For that, I thought of creating a viewport inside of a viewport. I already tried following a tutorial from Lazy Foo, and I can ...
0
votes
0answers
110 views

Assimp - generate tangents and bitangents

I have started using Assmip 3.1.1 in my OpenGL application. Let's consider a simple example. Here is obj triangle model: mtllib triangle.mtl v -5.0 0.0 0.0 v 0.0 0.0 0.0 v 0.0 5.0 0.0 vn 0.0 0.0 ...
2
votes
2answers
286 views

Movement on objects in 2D tile/grid based game

This question is an addition to both of these questions: Boat passing under a bridge in a 2D tile based RTS How to handle slopes/bridges in a 2d grid turn based strategy game While I get the idea ...
4
votes
1answer
271 views

Is it more efficient to render full size with AA, or scaled down with no AA?

Which is more resource-efficient (given a typical modern 3D game scene): Rendering it at 100% scale with anti-aliasing, or Rendering it larger and scaling it down to fit the screen, but without AA? ...
6
votes
1answer
583 views

Implementing line-of-sight in 3D?

I've been searching for information on implementing line-of-sight in my game. I've found some great resources for 2D implementations that produce pixel-perfect results, but there's very little info on ...
3
votes
1answer
104 views

What is FOVx in this diagram?

a beginner game developer here. I have recently taken upon learning about 3D game development and I am stuck on a simple matrix problem. The image is found from this article: ...
3
votes
2answers
832 views

How do I avoid 3D AABB collision response getting stuck at block edges?

I want the player to be able to slide along cubes, but without getting caught at the seam between 2 adjacent cubes. I've gotten it so that I can do x collision, with sliding, and y, and z, but I ...
4
votes
1answer
1k views

How do I make a collision between AABBs slide?

I have a room with objects inside. Each object has it's own AABB. I know how to check for collisions between the objects with an AABB-AABB intersection. How do I calculate an appropriate collision ...
1
vote
2answers
52 views

Translating Objects in Worldspace

Given the worldspace coordinates of a collection of arbitrarily positioned objects, how do I translate them while preserving their relative placement? For instance, I have a table and a few bowls that ...
6
votes
1answer
1k views

VBO and gl*Pointer management practises?

I'm aware it's not a simple yes/no question and for the moment I can't tell if it can be simply answered, or is it a topic for a long discussion which is not suitable for our Q&A format. I want ...
0
votes
0answers
54 views

Ray casting: need to find start and end vectors

So I have a 3D object and I'm trying to implement Maximum Intensity Projection on it. I already started of using a default vector to show per pixel, namely: pixelCoord[0] = uVec[0] * (i - ...
16
votes
6answers
3k views

Is Unlimited Detail real?

Many aspects of Unlimited Details Unlimited Detail Technology seems dubious to me, even the introductory paragraph (because of the usage of the word unlimited): Unlimited Detail is a new ...
0
votes
0answers
133 views

Directx9 engine Z-buffer problem with d3dimage

I am trying to integrate my Direct9 engine into my new WPF application via D3DImage. Everything is working except for the Z buffer. With the AutoDepthStencil at FALSE I can render my meshes but the ...
1
vote
3answers
209 views

Solving the “bullet problem” [duplicate]

I have a 3D matrix filled with "empty space" where I put some objects (objects are represented as bunch of occupied space). The bullet is fired from coordinates (x1,y1,z1) at angles ...
2
votes
1answer
504 views

OpenGL light appears to move with camera and changes with object rotation

I have a working open gl es 2.0 3d engine (my own) that I've used in several iOS apps. I recently noticed that on a mutli-symmetrical object the lighting didn't look the same at each rotation. For ...
0
votes
0answers
31 views

Connecting a model's joint to the joint of another model

I am trying to figure out the math behind orientating and translating a model so that a specified point on the model will connect with a specified point on another model. For example, given the ...
1
vote
1answer
111 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" ...
1
vote
1answer
658 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 ...
0
votes
2answers
77 views

Supersampling - Pixel color average calculation

I am currently trying to understand Supersampling. Wikipedia says (or at least Wikipedia tells me) that multiple color samples are taken from ONE pixel to calculate the final result. But in my mind ...
2
votes
1answer
169 views

More vertices vs more textures

I'm currently working on a dynamic 'door' creator, and I'm trying to decide which is more efficient. Not much experience with 3D render speeds, so I'm asking before I choose which direction to go ...
9
votes
1answer
7k views

How do I generate a 3D race track from a spline?

I want to generate a 3-dimensional race track around a spline that describes its shape. Here's an illustrative video. The track should be an endless tunnel that sweeps along a 3D spline, with some ...
1
vote
1answer
207 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 ...
2
votes
0answers
36 views

How can I generate isometric sprites based on a 3d model? [duplicate]

I'm wondering about the following: I'd like to create isometric sprites for a game that I'm currently developing. Rather than asking an artist to draw numerous sprites (which will be quite costly), ...
1
vote
1answer
294 views

How do I implement melee hit boxes for a top-down game?

For a 3D top-down game, how should I handle collision in melee combat? My game has no targeting system, so I can't use a simple distance check between attacker and target. What I am thinking is have ...
0
votes
0answers
81 views

Picture got distorted after has been moved to Directx11

I have moved app from Directx9 into Directx11. After this upgrade strange thing happened with my world. Objects get skewed and became 2D, also they are clipped in unexpected places. Two arrows at ...
1
vote
0answers
28 views

Blender: How to place a vertex where 2 faces intersect [closed]

What i have done: Made a object on blender that will be used as an asteroid for Space Engineers, i have done some tunnels but when i extended them to the surface it stayed like this: What i want ...
4
votes
7answers
432 views

Why doesn't it seem to be any development in the field of 3D VR gear, especially with regard to gaming?

I remember that way back around 1995, there was this big craze with VR in the media, a whole bunch of (mostly mediocre) games labeled as "virtual-reality-interactive-movie (...)" were published. If I ...
15
votes
3answers
7k views

What exactly is UV and UVW Mapping?

Trying to understand some basic 3D concepts, at the moment I'm trying to figure out how textures actually work. I know that UV and UVW mapping are techniques that map 2D Textures to 3D Objects - ...
3
votes
2answers
283 views

Multiple weapons for android game

I am trying to make a 3D game for android using the Rajawali engine to render the 3D graphics and blender for designing my models(exporting as .md2), and I want my character to be able to change ...
1
vote
2answers
132 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
1answer
67 views

XNA: “TextureCoordinate0” missing, but I'm not using textures

I'm trying to create a voxel game using XNA, but I'm getting a somewhat bizarre error when calling DrawIndexedPrimitives(): InvalidOperationException was unhandled The current vertex declaration does ...
0
votes
1answer
156 views

How crucial is 3D terrain in a classic RTS game? [closed]

My love of RTS games is from the days of Warcraft II, C&C, etc, when top-down/isometric views were king and terrain was generally tiled and flat. More modern games - as CPU/GPU power increased - ...
2
votes
1answer
79 views

What are “supporting points” in the context of the SAT?

I am currently implementing a separating axis theorem collision response. It can be used by oriented bounding boxes and axis-aligned bounding boxes. So far I have covered face-something contacts. I ...
0
votes
1answer
110 views

Specular light flickering with high specular power

I'm having some issues with specular lights, to be more specific, the specular color seems to be flickering when I set high power, like 512 (I set the specular color to green, so you can see better): ...
2
votes
1answer
159 views

How can I implement a camera like the one in RotMG?

RotMG, an MMO top-down shooter, takes on a unique 2d-3d style, and has an intriguing camera; The game is obviously 3d, not simply isometric, and if you play the game and turn on camera rotation you ...
1
vote
1answer
93 views

Alpha blending, transparence and z-ordering

I'm making some tests with alpha blending in a projet and I don't understand something. In my tests I've done something like that and everything look good: Draw blue box first (depth test: true, ...
0
votes
1answer
178 views

How can I create the illusion of a 3D object moving around in a static background?

I'm designing a Resident Evil clone using OpenGL. I'm curious how the older Resident Evil games used a static pre-rendered background with 3D models roaming around: Here, if the main player ...
2
votes
2answers
93 views

What is the meaning of the row “opposite” the translation column?

Usually, I do my matrix multiplication like this: [1 0 0 dx] | [px] [px + dx] [0 1 0 dy] | [py] [py + dy] [0 0 1 dz] | [pz] = [pz + dz] [A B C 1] | [1] [1] Where the translation is along ...
4
votes
4answers
3k 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, ...
1
vote
2answers
473 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 ...
5
votes
1answer
198 views

Why bother with a separate normal matrix, if there is never non-uniform scaling on the view matrix?

I am updating one of my shaders to a version of OpenGL/GLSL that doesn't automatically provide gl_NormalMatrix (for educational purposes; I'm not ripping out working code for the sake of it). ...
0
votes
1answer
174 views

Rendering a Voxelized Mesh [closed]

I've been reading many papers about how to voxelize meshes using different GPU techniques, but I've ran into a problem that I'm not sure how to solve properly. I understand the process of how to ...
1
vote
1answer
98 views

Custom 3D Noise function incorrectly generating in Lua

I have been working on a custom noise generator (not Perlin on Simplex or whatever), which works fine in two dimensional space, but upon converting it into three dimensional space, it turns into a ...
-1
votes
1answer
110 views

Why Is My AABB Collision Detection Not Working

I am going to be making a 3D game and I need to be able to test for accurate collision. I was able to get bounding sphere collision working (too inaccurate to be used for the whole game), but AABB ...