# Questions tagged [3d]

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

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### Find the largest empty space inside a cube populated with a point cloud?

Lets say we have a set of points (x, y, z) where we know 0 < x < 1 (same for y and <...
23 views

### How to handle player slowness while moving up and down in a Top Down game with angled ortho camera and angled sprite due to stretching of ground?

So i'm making a 2D top down game setup in 3D using tilted Sprites and angled orthographic camera. My camera setup is as shown. In my game I have the floor flat on the X/Z plane with walls/characters ...
65 views

### Unprojeting a line on the screen

I have a line connecting two points of my model. I see a projection of this line on my screen and a want to map a point of that projection to the corresponding point in my model PoV. Let ...
379 views

### How do I get an object to rotate in world space via RigidBody.AddTorque?

I'm getting really discouraged because I can't seem to figure how how to rotate my object via Rigidbody.AddTorque like it is on a figurative global turn table rather than a local turn table. Another ...
111 views

### How can I set up a 3D camera for a top-down game like Enter the Gungeon?

DodgeRollGames, the developers of Enter the Gungeon, tweeted that the game was in fact made in 3D They tried to explain how they set their camera in this reddit post. Basically what they said was : ...
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### Player rotation recalculation causes jittering on edges

When my player walks around a circular planet everything works well, but when my planet is a shape like a cube or a dodecahedron, even with smoothed edges, my character jitters if I walk slowly on the ...
25 views

### Extend distance for rendering grass and tree objects on terrain

I am trying to make an adventure game with a big landscape (made the terrain with terrain tools) with 3D models of grass (that I placed using terrain tools) but it only shows the grass/trees that are ...
38 views

### Rotating an object around a rotating object

Im trying to build a model for the solar system in OpenGl, and I got the planets to move around the sun, but can't get the satellites to move around their planet. I can't share my code since this an ...
341 views

### Swept 3d capsule intersection with AABB, what am I actually supposed to use to accomplish this?

I'm trying to figure out how to do continuous collision with a capsule (which would represent a collision volume for a player for example). Given how common the capsule is in many game engines, and ...
36 views

### How do I scale a cube in OpenGL?

The idea is to make an arm consisting of three segments, each having a cube-like shape. For this I have made the cube inside a function called drawCube() - a set of ...
55 views

### Compute spheres 2D speeds in perspective projected animations

I created two animations that consist of spheres moving in a perspective projected 3D space, which means that the size and speed of the spheres vary with the distance: they increase when they are ...
37 views

### 3D AxisAngle spins at 180 degrees

I am using the Axis Angle technique on objects so that they are oriented away from a planet surface like in Super Mario Galaxy. I am using two unit vectors [0,1,0] and a normal vector from the planet. ...
45 views

### How do I code double jumps to character controller in Unity?

Here is my script. I just started coding like 3 days ago so I don't know much. ...
30 views

### Make a rigidbody walk around a planet

I have my character with a rigidbody and attracted by the planet. I am trying to move it with its velocity. I tried this script: ...
21 views

### Character rotation jitters when looking around

I want my character to walk around sphere like a planet, so in my script I rotate it according to the normal of a raycast and I also rotate my character on the Y axis when I look around with the mouse....
123 views

### Make enemy follow player intelligently

I was trying to make a script to make my enemy follow my player intelligently (but not too much) and I want to know if there was a better way to do it (of course there is but I wanted to find a way ...
29 views

### Raycasting floor texture distortion problem

I'm currently working on a raycaster in construct 2. The FOV is 90 degrees with a screen resolution of 199 x 174. I used this tutorial when it comes to the floor raycasting. The floors seem to render ...
58 views

### How to calculate the shadow bounding box with a directional light

I'm trying to implement a directional light in my C++ / OpenGL engine, but I struggle to calculate the shadow bounding box (i.e the shadow frustum). The bounding box has to encompass the main frustum ...
166 views

### Godot label Attached to 3D object gets larger when moving away from the object

I have a scene that consists of a CSGBox and a Label as a child of it. In the script for the ...
422 views

### Shadow Shimmering When Moving Objects

I am having a shadow shimmering in my scene when using a shadow mapping technique. I know that there is a lot of posts over the internet dealing with this subject but my issue is slightly different. ...
32 views

### Surface-Sphere collision response

I'm making basketball throwing simulator and I have two questions about the collision response. To make collision response with any surface like the wall or ground, I'm using the following formulas to ...
31 views

### GLSL Shade a box different colors for two ends with one material in Three.js

First, I knew the following basic knowledges, GLSL Language, Learn WebGL2 ​- GLSL ​* GLSL Shaders OpenGL - Coordinate Systems, [OpenGL - Advanced GLSL] 3D Game Shaders For Beginners - GLSL ...
8k views

### Handling movement on sloped surfaces - clamping character to sloped surface

I've noticed that a lot of people seem to have this issue but I've yet to find an actual working solution - when a rigidbody-based character controller (I'm not using Unity's character controller) ...
78 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 ...
495 views

### Collision detection problem in XNA4/Monogame

I have been trying to get 3D collision detection working for a while and I think (hope) you people can help me. For my project I have created a 'sprite3d' kinda class which is called ...
597 views

### Unity3D CrossPlatformInput StandardAsset Multitouch

I have a small game I am working on, and I am trying to add touch support to it. Before I try to add that into the real game I wanted to do a test run on a small project. The project consists of a ...
59 views

### TMP Square Characters when adding Chinese

I'm trying to implement Chinese language in my app. But I'm seeing nothing but squares. I've tried to create from file and hex. They can't be added. For example, there are 3000 letters but only 17 are ...
2k 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 ...
24 views

### how to change a 3D character and other assets in-game

I want to make a game in which the 3D character is customizable. For example, there will be a selection of clothes that the character can wear, and when the player clicks on one of them, the character ...
270 views

### Unity crashes if there are more than 4 terrains

please can you help me with the issue that I face, that is, I decided to create open-world game by creating several terrains and connect them together in Unity and firstly respective size of the ...
444 views

### Cutting a 3D mesh with a 2D shape

I have a 2D image that i want to use to cut into a 3D mesh while leaving it closed (basically cut straight through it, and close it by generating vertices in both places it cut, front and back, to ...
2k views

### Displaying text on a 3D plane

I am busy with a pet project where I am trying to create a Collectible Card Game in 3D. These cards have Hp and Damage etc. but I cannot find a way to neatly display these values. I tried to use a ...
25 views

### Obj file vertex coordinates to new coordinate space

I am trying to convert the vertex positions in my obj file to a new coordinate system. I understand I need to multiply each vertex with the transformation matrix, however I am trying to figure out the ...
72 views

### Third Person SpaceShip Camera Directx9 follows objekt but gets weird after moving object

We have the following code. It should follow the game Object in every step but it does not. In the beginning we can rotate the object where ever we want and it works but after moving it some the ...
3k views

### Displaying possible movement tiles

What's the fastest way to highlight all possible movement tiles for a player on a square grid? Players can only move up, down, left, right. Tiles can cost more than one movement, multiple levels are ...
250 views

### Unity XR Spectator Camera

I would like to have a VR camera (for the player) but also have another camera (spectator). I am using Unity 2019.4.8f1 on the Universal Render Pipeline I have only been able to find outdated articles:...
78 views

### Unity creating 3d clothes for game character

I am trying to make a system where players can change out their clothes with others if they like, and even layer up clothes such as covering a shirt with a jacket, then an armored vest. I have ran ...
407 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 ...
491 views

### Rigid body falls through static mesh even though collision is detected

I'm using Jitter Physics to create a game. For testing, I have ball (a spherical rigid body) falling onto a small box-like mesh. The problem is that the ball falls straight through the floor, even ...
97 views

### Camera rotation is weird when it's a child of another object

I implemented scene graph hierarchy into my 3D game engine, and there seems to be a problem with the camera's rotation when it is a child of another object. It only happens with the camera, not any ...
158 views

### How does lookAt matrix math work?

Can someone provide me an explanation of how the lookAt matrix works? ...
465 views

### Swept aabb 3d incorrect collision resolution along negative normals

I have followed this tutorial and ported it to 3d with glm. Everything works fine when the collision normal is reported as positive ((1,0,0),(0,1,0),(0,0,1)) but when it is negative the player aabb ...
57 views

### Goal system unity

How do I make a Goal system in unity that must be completed before the level can be passed. Goals may be:pick up block Get red flag Go to certain position Here is sample code - ...
341 views

### How to generate a multiplier map for radiosity

I am following this tutorial: here I am at the part where you are creating a hemicube. I have got the code to render the scene into a texture and therfore an array. Now how can I generate a so-called ...
25 views

### Problem with rotation to normal for FPP character controller

I want to create a first person perspective character controller that allows for walking on walls and ceiling by transitioning with a slope (kinda like the anti-virus levels in Rachet & Clank: ...
43 views

### Collision detection stop movement

I am making a simple first person 3D game in OpenGL with C++. I am just wondering on how you make an object stop moving when it collides with another object. This is what I am using for detecting ...
1k views

### 2D/3D Soft body physics in Unity

I want to implement soft bodies in my game similar to this link. I tried using this Soft body simulation plugin but it has the following problems: Only works with box colliders. Doesn’t work with ...
61 views

### Implementing wet and dirty materials [closed]

How you would implement wet and dirty materials or material overlays that you can clean like in PowerWash Simulator.