Questions tagged [3d]

3D refers to three dimensional space where coordinates are represented with X, Y and Z values.

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28 views

2D Platformer into a First-Person 3D one? [on hold]

I am a beginner at game creation/programming/development and I want to know is it possible to switch from a 2D Platformer into a 3D Platformer in the SAME GAME? My idea is that you start at in a 2D (...
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0answers
10 views

How to organize the highlighting of a 3D object with which contact occurs?

I want to repeat a certain "Select (); - Deselect ();", as shown in the screenshot. Prompt with advice how to implement it or what you need to read to implement this feature. I tried to found ...
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1answer
78 views

How to hide objects behind an invisible plane?

I am using Unity 2019.1.4f1 (personal) in regular 3D mode. I want to make a material for a plane that will cause everything behind that plane to be invisible. I want a character who steps through a ...
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3answers
110 views

How to stop player when game over?

problem is when game over myplayer not stop?? ...
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1answer
49 views

Assigning relative force to a projectile fired while orbiting a sphere

Projectile Not Correctly Inheriting Parent Velocity (Unity3D) So I am trying to incorporate the above person's changes into a script I am making although I'm no great coder and I'm not even sure ...
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1answer
61 views

How to Set PlayerPrefs.SetInt?

playerpreferance.setint problem I am develop one game.In this game 15 levels. I am face this type of issues when send one level score into second levels. I am used player preferences in start() ...
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0answers
51 views

How should a 3D map be stored?

I have an array of 3d vertices, Vertex3D[][] ground; so for each element in the array, I have an array of three 3D vertices, a triangle. But this means I cannot ...
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1answer
17 views

Bullet Projectile Verticle Rotation

I'm very new to C# and Unity, and have been working on a projectile based weapon, and for the most part it's been working well. However, although the bullet fires facing the direction it's being shot ...
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0answers
26 views

Find mouse pos in 3D space?

I have a game where there is a set of tiles rotated 45° away from the camera. I want to work out what tile is being hovered over by the mouse, and for that I need to translate the mouse pos on the ...
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1answer
92 views

Convert 3D direction vectors to yaw/pitch/roll angles

I have the code below that takes a set of yaw, pitch, and roll rotation angles (in degrees), and populates forward, right, and up basis vectors to express this rotated orientation as a Cartesian ...
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0answers
16 views

Moving and rotating object with another object [duplicate]

Sorry i bad painter)) Need move and rotate 'OBJECT №2' with 'OBJECT №1' I have origin point(also rotation point) and angles of two object. (Also min and max coordinates of these objects) Vector ...
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1answer
70 views

How can I change position of camera?

I'm working on 3D game, where the player needs to complete 4 play fields called "homes" in level 1, then progress to level 2 which has 4 homes of its own. In level 1, when the player completes the ...
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1answer
68 views

Move and rotate one object to another C++ [3D]

I have two object, need attach 'TWO OBJECT' to 'ONE OBJECT'. I have vectors 'angle' 'origin' of ONE and TWO objects. I tried do "TWOOBJECT.origin += ONE.origin - ONE.oldorigin", this just attach ...
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0answers
39 views

How can I get my player's character to slide along a rail?

I am creating a snowboarding game and would like my player to be able to jump on a rail and move along it if it lands on it. I have no idea how to approach this. I have already tried using ray casts ...
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1answer
31 views

Are the sides of a beveled rectangular prism considered “ngons”, to be avoided?

Many tutorials I have watched say that everything should be made in 'quads' (ie. no triangles, and no ngons). I think this is mainly due to getting into this habit so that if I make a complex model, ...
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0answers
37 views

Problem with repeating objects in array when already in the array

When the player move forward then paint is instantiate and stored in the array, even if the paint is already in the array it will again be stored in the array. But I don't want to repeat any paint in ...
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0answers
6 views

How to resize Unity Cinemachine Dolly track?

I recently imported a 1:1 scale building .obj model into unity and I'm trying too use cinemachine dolly track to navigate the interior of the building. The problem is that the visual of the dolly ...
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1answer
82 views

How to detect when the player has filled a shape?

In my game, the player is presented with a plane containing obstacles (orange / blue) and regions of empty space (white). The player moves their green cube around the empty space, which instantiates ...
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1answer
23 views

How can spotlights be implemented with a perspective projection?

I was reading Shadow Mapping with Directional Lights and noted that spotlights are implemented by rendering with the perspective projection, stating that the spotlight worked just like the camera. ...
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1answer
54 views

Multi-level 3D grid based pathfinding in Unity

I'm trying to come up with a way to pathfind on multiple levels. See image: The orange walls would be considered a ladder, connecting you to the upper levels. At first I thought of looking at it as ...
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1answer
28 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 ...
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1answer
21 views

Face culling all faces that cannot be seen [duplicate]

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 ...
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0answers
30 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 ...
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1answer
53 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 ...
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0answers
54 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 ...
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1answer
114 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 ...
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1answer
43 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 ...
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1answer
46 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 ...
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2answers
36 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 ...
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0answers
52 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
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2answers
187 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 ...
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1answer
54 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 ...
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4answers
146 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' ...
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2answers
46 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 ...
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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 ...
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1answer
90 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 / ...
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1answer
23 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
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1answer
126 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 ...
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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 ...
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1answer
41 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 "...
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1answer
59 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 ...
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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 ...
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0answers
23 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 ...
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1answer
72 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 ...
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1answer
48 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 ...
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0answers
9 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 ...
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1answer
102 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 ...
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0answers
26 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 ...
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1answer
19 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 ...
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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 ...