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A technique for using rays to determine points of intersection. Often used in lighting simulation.

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I'm developing an FPS shooter in Unreal Engine 5 and currently working on the aiming mechanics for keyboard and mouse (KBM). I want to implement an aim assist system that uses ray casting to detect ...
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I have written a simple raycaster in C++ which can render wall based scenes like 3d mazes. On YouTube I saw a video showcasing 3D games made in Scratch. One of the games were a 3d racing game where ...
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I am making a Sonic game in Pygame and I have recently gotten my hands on a Python class that uses pygame.rect and pygame.mask in unison to create sensors that can be used to accurately detect the ...
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I come for theory help with a classic raycast algorithm (currently, based on DDA). The problem is not with the algorithm itself, but with the floor rendering code. I left the code of my raycast render ...
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I'm trying to ray-cast mouse clicks to the surface of a sphere (from which point, I'm going to get the coordinates of the vertex of the sphere's mesh that are closest to the click). The following ...
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I am making a snake AI with Unity ML Agents. There will be lots of snakes who will eat and dodge each other. A 3D RayPerceptionSensor detects everything, but there is a specific case where a problem ...
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I've been trying to fix this problem myself for ages, but I really do need help. I'm creating a BSP tree for my 3D game (baked in the map files, quake style) to replace my existing naïve collision &...
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I've run into a curious issue when implementing ray picking in my game engine. It seems the Z coordinate of the Projected matrix has to be ever so slightly more than ...
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I have a gameobject with a mesh collider. The mesh is simply a flat plane. I raycast to the mesh and I'd like to get the index on the material's basemap where I got a hit. I assumed ...
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I'm out of ideas at this point. I'm trying to set up a function inside my player controller that aligns the player with whatever is under it (usually the ground), ive tried using Raycasts, collisions ...
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I am writing a simple graphics engine using Rusts WGPU. I have a Sphere rendering at the origin of my scene like so: ...
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I have a question regarding Unity VR and Interaction Toolkit. When I point at a UI canvas element, the raycast turns from red to white (indicating that it is a valid target). However, when I create a ...
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I've tried to ray cast my mouse position to Sprite3D on screen but I have some problems with it. ...
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What if an object were to have collision detection implemented as so: A ray in the direction the object is moving in, and a ray in the direction of gravity.
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I'm making a VR game in Unity. I want to select a cylinder with ray interactor and drag it, and as I drag, it should stretch. This is the code I have currently for 2D: ...
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I'm trying to implement a function that takes a ray as its start and end position and returns all intersections with the map grid. I wrote following code and got a problem. Function returns correct ...
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I am writing a pseudo-3D game in Python. After I tried to fix the fisheye problem, a new one appeared - if you stand close to the wall and look so that the wall is on the side, then the borders of the ...
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I'm trying to cast a ray so I can implement mouse picking. My game uses 2:1 isometric with a 3D world sim that uses AABBs. Positive X points to the bottom right, positive Y points to the bottom left, ...
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Before this, I try to insert an image in a tooltip and it was already done. But right now, I want to try to insert a sound in the tooltip. What I want to do is when I point my cursor to the object it ...
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I want to display the image using a tooltip. So when I point to the 3dobject, it will display the image that I already created. Right now I already set the sprite in the tooltip but I have an error in ...
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I'm making a 2D game and I'm using a raycast. I want the raycast to ignore the platform when hitting it from beneath, but not when hitting it from above. Right now the raycast always hits no matter ...
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I'm rendering a maze with raycasting in Scratch. When I'm far away, the walls look nice, but when I'm near the walls they get a weird fisheye effect: Here is the code for the raycasting: And the code ...
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I have about ten UIs with buttons in my scene. I can cast my XR Ray on all of these UIs and the buttons work fine except two. The buttons on these two UIs are clickable but the rays are not showing on ...
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I have a 2D Sprite that patrols around a platform and is supposed to flip when it reaches the edge. The way the flipping is implemented is through Raycasts. There are two Transforms, on the Left and ...
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I have a simple scene in my Unity 3d project. There is a Canvas (UI Scale Mode in Canvas Scaler is set to Constant Pixel Size but the same is with Scale with screen size), Panel inside it (Stretched ...
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I am making a 2D platform and implementing a character similar to a Mario Goomba. This character will move left or right, depending on whether or not a raycast determines that there is an object in ...
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I am setting up my project with XR Interaction toolkit. As usual, there are two red rays from the controllers after the set up as shown below. However, I want the rays to appear exactly as it is in ...
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I'm making a simple character controller. Each frame the player moves by moveDistance units in the moveDir direction. I'm ...
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Inigo Quilez's website has a page of 3D ray-surface intersectors, one of which is for a basic 3D box: ...
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I have a grid of gameobjects with colliders. Currently they all have unity's inbuilt void OnMouseDown function which gets called when the mouse clicks on a collider. This then executes some game logic ...
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I'm trying to build a simple grid-based raycaster, but I'm having trouble with rendering block corners. First of all, I want to change the color of all the y-axis walls. But a block's corner belongs ...
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I'm writing a raycasting engine in C++ and SFML. I have the wall texturing done and I'm trying to get floor and ceiling texturing right. I almost got it but the textures are "sliding" when ...
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I have an issue with my character controller. I'm using a raycast from the enemy AI as a line of sight in order to start following the player. My issue is that with my current character controller ...
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Context Hello, its me again. I have been playing around with "Object Pool" and it is fascinating the amount of CPU performance can save up. However, I have encountered a new "feature&...
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I am having a problem where my ray is unable to detect the player, even if I did layermask and went to draw ray and all other stuff. Here is my code ...
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I have a bicycle with suspension and need to find the contact point of the wheel on the "road". If the front fork was pointing straight down, it would be as easy as doing a raycast down the ...
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I've been searching through the Unity docs (https://docs.unity3d.com/ScriptReference/Physics.Raycast.html), but no matter where I look, I couldn't find exact behaviour of Physics.Raycast() method. I'...
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I have a ship that will shoot targets, but cannons on the right side should never try to shot at targets on the left side of the ship. Thus I have created sectors using the ...
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I am trying to create a raycasting engine using C and CSFML, I already have the walls and textures rendering done and right now I would like to be able to render sprites into the scene. The difficulty ...
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I've been having this problem in the last couple of hours and I was just thinking if someone could help me figure it out, since I am unfortunately not a programmer, or at least a good one at all. I'm ...
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I've tried Bresenham line and Raycasting, but they don't quite give the results I need (examples in the screenshot). '&' - character '+' - cells that can be attacked by the character '#' - walls ...
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I have been trying to work on raycast, where if a raycast hits an object then an image will be displayed on the canvas, like on COD Warzone if I go to an elevator shaft, and look at the wire to go up, ...
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I'm trying to determine if a point is inside or outside a (triangle) mesh. The best way I found was to cast a ray from the point and count how many triangles intersect. (Odd or even). I used Möller–...
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I'm currently working on a raycaster in Java, and so far, I have the floor correctly textured. The problem, however, is that the floor doesn't scroll. In other words, when I move the camera in the ...
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INTRODUCTION: In unity, I want to make a dynamic, object use system. Where the main player camera shoots a raycast when left mouse button is clicked and if an object that can be used for example a ...
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I have a 3D side scroller style game in which the player flies along avoiding stuff, you know, side-scrollery things. I'd like to add an effect (particle system) to the player when they get close (say ...
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I found a video on YouTube with a sercol and a beam, and everything seems to be fine, but the beam doubles and flickers after spawning from the mirror, tell me what could be the problem, screenshot ...
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I'm using code like the following with a tilemap and tilemap collider 2d: var ray = Physics2D.RaycastAll(worldCoordinate, Vector2.zero); Unfortunately, when I ...
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I want to determine if a mesh is lit by the directional light on my scene in editor to automatically disable its "dynamic shadow casting" property (let's say I have one light source in my ...
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I'm building a Raycast setup where game objects run code on click / touch. ...
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