Questions tagged [3d]
3D refers to three dimensional space where coordinates are represented with X, Y and Z values.
0
votes
0answers
22 views
3d characters on 2d background game suggestions [on hold]
First off, I am wanting to get back into making games, I have made a few for personal use in gamemaker but never finished them as school always got in the way or they would get deleted when my ...
1
vote
1answer
27 views
Displaying debug line in custom raytracer implementation
Not sure if I should post this here or on the Math forum, but I will try my luck.
Some background. I made my custom raytracer. The processing happens purely on the CPU for now, no GPU interaction ...
0
votes
1answer
17 views
Face culling all faces that cannot be seen
I'm working on a simple 3d game using the Processing Java environment. I want to optimise my code so I can draw many many 'objects' (the world is made up of many different shaped objects that live ...
0
votes
0answers
25 views
Value returned is different to the value of the original object
I was wondering if someone could help me resolve a small roadblock I encountered aha... Essentially, in my Pickup.cpp file you can see that I'm trying to establish a behaviour wherein the object being ...
0
votes
1answer
38 views
What is the alternative (new) 3d projection called that solves the stretching / zooming at sides of monitor?
I understand about camera's and projections etc, such that we have distortion and zooming when at the sides of the screen (exacerbated on 21:9 monitors), however a few years ago, in a Unity forum ...
0
votes
0answers
35 views
Help to Code Bowling Like Feature in Unity for Mobile
I need Code or Guidelines for Touch Feature. When We Drag ball back and Send it Forward.
I am Making feature like bowling, and I need Player to add force while dragging back and also curve the path of ...
0
votes
1answer
66 views
How is background of 2.5d games developed
When I say 2.5d games, I mean like this:
Bloodstained Ritual of the Night DEMO gameplay
My question is, I know the characters and platforms are 3d but are the backgrounds all 3d as well? Even if its ...
3
votes
1answer
38 views
Making the camera look at the player while keeping another object in view
I'm working on a sorta football game where I need my player to always be at the center of the camera view while keeping the ball into view, without any vertical movement. The idea would be for the ...
0
votes
1answer
37 views
Dealing with curved lines in GJK
I'm currently using a GJK implementation (supported by EPA for penetration) and I'm trying to optimise the calculation times of distance calculations.
One of the biggest hits is trying to solve for ...
0
votes
2answers
22 views
How can I edit collisions in Unreal Engine?
I made a concave house model. When I import it to Unreal Engine it generates a simple box collision that covers the full mesh. I need a collision that only covers the walls. How can I generate one or ...
1
vote
0answers
37 views
Why don't I see tile-based 3D graphics? [closed]
As we know, tiles can make it quicker to update large portions of the display at once, as compared with a bitmap. To put, say a letter, on the screen, the Commodore 64 typically does two writes (the ...
2
votes
2answers
153 views
Most efficient way to get the closest point to a 3d rectangle
I have a 3D rectangle, with 4 points (x,y,z)
And I have a player, who can be anywere (inside the rectangle, outside, not even in the plane, in the corner...).
I would like to get the closest point in ...
0
votes
1answer
33 views
Quaternion.LookRotation with Joystick
I am having an issue i cannot seem to figure out within my code. What this code does at the moment is that it rotates the 3D Model around the z axis but i need it to rotate around the y axis. Any help ...
0
votes
4answers
48 views
How do I make TextMesh Pro go invisible when at a distance from the camera?
I'm building a 4x game. I've rendered the galaxy, and I want the text below each star to disappear when I'm zoomed out, so it looks nicer.
My stars are Prefabs with a star sprite and a 'UI' ...
2
votes
2answers
44 views
Rotate on one axis, but visibly keep the other axes stable and editable
It's been a long two weeks. Quaternions are freaking complicated. I've managed to make a few baby steps towards finishing my project, but I've hit a brick wall and could use a few of your beautiful ...
0
votes
1answer
34 views
Z rotation matrix inverting object
I'm currently creating a 3d game where I need to rotate shapes. To do se, I created a rotation matrix for each axis, X, Y and Z. X and Y are giving me expected results, but not Z who kind of "inverts ...
0
votes
1answer
40 views
3d isometric projection matrix?
I have 3d vectors that I want to project as 2d vectors to draw my shapes. I got a 3d vector cameraPosition, a 3d vector cameraDirection, a float renderDistance. I need to create an orthogonal / ...
0
votes
1answer
19 views
Vertices in index buffer not rendered
I'm beginning with the 3D rendering in Monogame and i'm facing not a real issue because i already find a way to bypass it but more of a question.
I'm rendering a simple cube with 8 vertices like that:...
2
votes
1answer
118 views
Dr.Strange's door in Unity3D, how to put a projected void on a plane?
My question is about a visual trick I would like to perform in Unity3D. I want the player to walk outside a door and see no walls of the room behind them, just the door. They should still be able to ...
1
vote
0answers
24 views
Scene for Computer Screen
We are developing a scene that will involve heavily interacting with a "touch screen monitor" in the scene.. Because the workflow of the touch screen will need to be dynamic we are creating a REST API ...
0
votes
1answer
32 views
LineRenderer on Mesh surface
Goal: Render distance lines between two points on the surface of a mesh-based primitive (i.e. sphere, cube, etc).
Current Solution: Iteratively traverse distance line between two end points and "...
0
votes
1answer
52 views
Orbital rotation equation
I am developing a space sandbox (3D). Now I am working on an asteroid belt around a planet. I have an Asteroid class and an ...
0
votes
1answer
32 views
Unity, Object's vectors are not rotating with the object. what did i do wrong?
I found a youtube video (Sebastian Lague: Character Creation (E07: Unity character controller)) that has a really good movement script, I understood it and used it for my character.
When I started ...
0
votes
0answers
21 views
Managing character movement in 3D in AR
I'm working on an ARKit project where I need to manage the movement of an object (white box) on a plane (blue square).
The characteristics of the environment are :
The box can move only in 2D along ...
0
votes
1answer
70 views
Get a Jump normal gravity based on Attractor Points, lines or Quad placed in the Level Design (in a Mario galaxy like gravity)
I have an algorithme to find.
I have a player in a 3D space on a random planet. My goal is to have an oriented gravity toward my planet. And when I jump: Find the right normal direction.
BUT I can't ...
0
votes
1answer
40 views
how do I move an object based on rotation of another object?
This question is related to my other question about camera rotation. I hope its acceptable to ask a second question. I cannot figure out the math of how to calculate moving the camera to stay behind ...
0
votes
0answers
8 views
Detecting when a single group of blocks is broken into multiple groups
Let's say you have an array of blocks (AABB), where each block is touching or intersecting any number of other blocks. Together they make up a larger object, and because they're all touching, you can ...
0
votes
1answer
76 views
How can I create a tunnel/parallax/depth effect based on mobile device tilting?
I would like to create applications similar to what's displayed in these videos:
VR Tunnel Live Wallpaper for Android
The parallax view Part 1
These mobile application are supposed to react to ...
1
vote
0answers
25 views
Discrete line inside a 3D matrix
First of all a little premise: I'm following this tutorial on YouTube for procedural 2d cave generation in unity using cellular automata and I'm extending it in order to make caves in all three ...
0
votes
1answer
17 views
Transfer mouse movements to a GameObject in 3D according to camera position and rotation
I'd like the game object to follow the mouse but I have trouble doing this when the object is in 3D and the camera has been rotated.
The only thing that seems to be true (and still it works only when ...
0
votes
1answer
16 views
synchronise two coordinate planes
So i have two coordinate planes. One is player and mouse click position relative to player. Other is the world map.
I need to find the point on the world map, where the mouse clicks.
The map is ...
1
vote
1answer
47 views
How do I find the downward sliding direction of a plane?
first time poster.
I'm curious as to how I can obtain a vector that defines the downward slope of a 3D plane. The goal is to apply this to a player as a force to achieve a sliding mechanic, like in ...
0
votes
1answer
73 views
C# 2D Perlin Noise Heightmap By Seed
I need a function of 'Perlin Noise' in this format:
public int PerlinNoise_maxY(int seed, int x, int z)
{
// ...
}
The function gets Seed, X cordinent and a ...
0
votes
0answers
20 views
Is it possible to generate a 2D surface that approaches certain mesh, and then a specialised ray-tracing function for it?
As an example, suppose we are trying to ray-trace a sphere. There are two options. The first one is to build a mesh of triangles approximating the sphere and ray trace it. Unfortunately, the more ...
2
votes
2answers
79 views
most compact way to represent dice face translations rolling in cardinal directions
I'm making a 2-D dice rolling game in BASIC (think mechanics similar to Devil Dice on the Playstation, but top-down 2D graphics). I'm trying to accurately represent the transitions of a die when ...
0
votes
1answer
25 views
Interpreting focal length in units of pixels
I am working on a renderer of sorts and I have some fundamental questions. Let's say I have a vector in a 3D virtual world space which is unitless, and I want to project it onto a 2D screen, so I need ...
0
votes
0answers
12 views
How can I prevent the balls from merging? [duplicate]
In my game mutiple balls are overlap/merge into one ball.please tell me solution of this problem.
0
votes
0answers
60 views
Godot: Possible to create a 2D tilemap and set it as a texture for a 3D surface?
If I created tilemap of some sort of pattern or image and wanted to set it as the texture of a 3d surface or 3d model, how would I do it?
0
votes
1answer
47 views
Scrolling in 3d Shmup with 32Bit era effects
How can I create a scrolling effect like in Ikaruga, where the background is on Rails and the foreground is fixed with the player in Unity?
https://www.youtube.com/watch?v=H6d0PkEPKSk
Some more ...
1
vote
0answers
43 views
OBB vs Frustrum collision detection
Some definitions:
An oriented bounding box (OBB) is a rectangular block which can be represented in many ways, as a collection of eight vertices, a collection of six planes or others, for this ...
0
votes
1answer
35 views
unity input controls
so im going through the roll a ball tutorial for unity and ive gotten though setting up all the controls to allow my ball character to move around the space ive built. but the tutorial says nothing ...
0
votes
2answers
55 views
Find if one player is visible to the other
Two players (p1 and p2) are standing in a 3D space, represented by points (x1, y1, z1) and (x2, y2, z2). Player 2 is holding a light source, pointing in the direction given by a normalised vector (xn, ...
1
vote
0answers
40 views
Convert bones by bone matrix
I have a 3d-models from old game.
They have the following structure:
...
0
votes
1answer
65 views
Polygons depth sorting in Z-buffer
Why is it that the Z-buffer algorithm does not require polygons to be depth sorted to function correctly?
0
votes
1answer
80 views
Unity: Creating Word Search highlighting
For days I am struggling to implement the highlighting functionality in game as there is not much tutorial also for this. I did how ever make the cell of the grid change the material color but it ...
0
votes
2answers
129 views
Game assets are images or 3D models
I am new to game development and I have created simple games with javascript and SFML. Those games are 2D and there I used images as my gaming assets. I was trying to be familiar with OpenGL like 3D ...
0
votes
1answer
347 views
Unity3D C# Drag object smoothly on it's x axis that's already bouncing
In my scene, I have a bouncing ball that collides with a cube. On each collision the ball returns to the same height. How can I get the ball to smoothly move along the x-axis by dragging my finger ...
1
vote
1answer
85 views
Why does the head of my ragdoll act like its about to fly off its shoulders?
The problem can be seen here: https://gfycat.com/LimpingMerryGermanshorthairedpointer
Ive created my ragdolls by using the Unity ragdoll creator tool.
To begin with, all the limbs of my ragdoll ...
1
vote
0answers
48 views
How to make backgrounds for 3D games? [closed]
I've started to study game design and I couldn't really find an answer for this one. Let's imagine a small level with a nice (non passable) background in the distance. The background has mountains, ...
0
votes
1answer
57 views
Problems when rotating object to animate in Unity
I am trying to create some animations for a car model in Unity and I have a problem with the rotation of the wheels
https://imgur.com/a/HcWxyob
Here I can set the rotation properly as the pivot ...
