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
99 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
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1answer
551 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
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2answers
59 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
163 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
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1answer
6k 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
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1answer
93 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
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0answers
35 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
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1answer
210 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 ...
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0answers
75 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 ...
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0answers
26 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
428 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
6k 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
260 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
129 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
64 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
129 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
68 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
85 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): ...
1
vote
1answer
118 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 ...
3
votes
2answers
222 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 ...
1
vote
1answer
78 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
130 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
66 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 ...
2
votes
4answers
2k 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
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2answers
312 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
145 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
138 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
77 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
89 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 ...
20
votes
4answers
6k 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:
1
vote
1answer
380 views

What options do I have for a 3D game without graphics but yet maintaining physics for later?

I don't believe I expressed well the title for my question so if you believe you can change it for a more suitable title please do so or drop me a comment. Currently I am starting a 3D game with C# ...
0
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0answers
26 views

How is a 3D Environment displayed on a 2D Screen? [duplicate]

So basically I need to know how you display a 3D environment on a 2D screen. How is this done? I know there's a new axis called the Z axis but how does it work? If possible please explain this in the ...
1
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0answers
145 views

How do I detect collisions between a particle-based net and a ball?

I've implemented a net using Verlet integration and many points connected with constrains; like this demo, but in 3D. I want to implement collision detection between this net and a ball (like in a ...
27
votes
6answers
6k views

What 3D level development tools are available to indie developers? [closed]

People who build in Unity or UDK have immediate access to a 3D level editor. People who build their games in XNA or from scratch have no such thing. I'm looking for 3D level development tools ...
7
votes
3answers
5k views

How much is java used in 2d/3d indie games? (before/after Minecraft) [closed]

I wonder for my own use and curiosity, how popular is Java in indie game development , in 2d and 3d? Are there any good open/closed source games done in java?
2
votes
1answer
109 views

Infinite loop of prerendered 3d graphic

I have a game where I want a never ending pathway for the character to walk along. So in my 3d modeling tool I created a path like this: now I want to loop that model over and over in my ...
1
vote
1answer
92 views

Rotate an arrow on a plane?

I'm creating a display for a GPS-based embedded system and would like to have an arrow indicating the current bearing. I'd love the arrow to have a 3d appearance by rotating it on a plane tilted up ...
0
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0answers
106 views

3d game math problem [duplicate]

i'm very much new to 3d math operations. I know how to rotate 3d points certain degrees arbitrarily by any axis but we were given a strange problem to think on. I'll spare using actual numbers on ...
0
votes
1answer
65 views

Fixed joints in 3D

I'd like to build something like rigid origami in 3D space. So I need some mesh where each vertex is a particle and the set of the edges makes a chains/fabric where each edge is a "fixed length" ...
0
votes
0answers
99 views

Depth Map not rendering properly in DirectX / HLSL / SharpDX

I've been struggling with this for awhile, and everything I find online says this SHOULD be working, but I apparently missed something. I'm attempting to run Deferred Rendering in SharpDX on a ...
0
votes
1answer
70 views

How can I inspect 3D model exactness? [closed]

I am neither a game designer nor a graphic designer. I am a .Net and C# software developer. I have a game project and I've still been studying to learn game concepts and technolgies for a year. ...
2
votes
1answer
125 views

Should I bother merging faces in my 3D block-based game?

Okay, so I have a bunch of cubes in a 3d-world. I already implemented face culling, so that when a cube is next to another cube, their touching faces won't be drawn, or even sent to the buffer. ...
1
vote
1answer
78 views

How to find the 3D object the camera is pointed at

I'm currently developing a 3-dimensional game (the first I've ever done and it's not as hard as I thought it would be!), but I've run into a little bit of a snag. I want to find the current block the ...
20
votes
5answers
3k views

Why do we use 4x4 matrices to transform things in 3D?

To translate a vector by 10 unit in the X direction, why do we have to use a matrix? We can just add 10 to the mat[0][0], and we got the same result too.
11
votes
5answers
4k views

Working with lots of cubes. Improving performance?

Edit: To sum the question up, I have a voxel based world (Minecraft style (Thanks Communist Duck)) which is suffering from poor performance. I am not positive on the source but would like any possible ...
1
vote
1answer
73 views

How can I do a weighted cascade down a path in a 3D environment?

I am trying to perform a weighted cascade down a path in a 3D environment. Now, what I am trying to do is have one object(a cube) in the environment scan from its coords 1 in every direction for ...
1
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1answer
256 views

Mouse click movement

I need to make realistic human movement (3D) using mouse click. Get mouse click point using Raycast. Smoothly Slerp to LookRotation. Move transform.forward. Everything works fine, except I have ...
1
vote
1answer
51 views

XNA - DrawIndexedPrimitives or DrawUserIndexedPrimitives?

When rendering primitives in XNA, does it matter if I use DrawIndexedPrimitives() versus DrawUserIndexedPrimitives()? RB Whitaker uses the former, while Reimer's uses the latter. From what I can ...
2
votes
3answers
213 views

How do reflections work for large flat surfaces?

I understand how reflections work for objects. A cubemap would be rendered around a certain point in 3D space, usually at the center of the object that the reflection is to be applied to, and that is ...
1
vote
1answer
323 views

Opentk LookAt() and 'eye' argument rotating

I'm trying to create rotating camera, which looks down by 45 deegre like this: However my code for rotating eye vector is not working properly and I achieve vertical rotation, when it should be ...