All Questions
Tagged with 3d collision-detection
102 questions
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How can I detect collision between a box and a minimum poly collision mesh?
Mostly a C++ newbie, trying to do a 3D game in Raylib.
I have a set of fairly irregular meshes that I'd like to see if a box collider has penetrated. For this project, a fairly high level of accuracy ...
- 171
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32
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In Unity, how can I check whether two objects are sliding on each other or rolling against one another?
I'm coding a script to make objects emit appropriate noises on contact with other objects, with different sounds for isolated impacts, sliding, and rolling.
Impacts work just fine, but for the other ...
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165
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3D AABB vs AABB discrete collision - How to choose resolution axis?
I'm working on a simple 3D collision system that only needs to handle dynamic AABB vs static AABB. It needs a sliding collision response, but it doesn't need to sweep (i.e. doesn't need continuous, ...
- 43
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1
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96
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BSP Tree Troubles and Unpredictable Results
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 &...
- 1
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44
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how to get all points contained in the area of an object of any shape
how would I get points contained by objects, so that I can check for intersections of points, and I also ask myself if checking for intersections each frame would be too CPU intensive?
1
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1
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306
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teleportation...how to not teleport inside walls
when the player uses the teleportation skill, he is instantly teleported X distance in the direction of movement so front, back, left and right depending in which direction the player wants to go.
the ...
- 873
1
vote
1
answer
343
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Collision normal for sphere near edge of triangle face
When my sphere (or bottom part of a capsule) moves with its bottom near the edge of a mostly horizontal triangle (a face of a heightmap), I am sometimes getting very bad (mostly horizontal) normals. ...
- 171
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1
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809
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How to implement a directional attacking/blocking system?
I'm working on implementing a directional attacking / blocking system in Unity à la Elder Scrolls: Arena or more recently, Mount & Blade - where moving the mouse in a certain direction signals a ...
3
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2
answers
2k
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How to differentiate between enemy and something else in Godot?
So, I have a simple 3D game with a player, an enemy, and walls. I've figured out how to detect collisions between my player (RigidBody) and an enemy or wall (Static Body). I want to know how can I ...
- 33
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207
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Sphere collision resolution when colliding with multiple meshes
I'm writing my own player collision physics and I'm stuck at collision resolution part. I have sphere as a player and scene made of static meshes. Collision resolution works fine when player is ...
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1
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102
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How can I create a good physics colliders for these models in Unity3D
I need to make a 3D colliders in Unity with those forms. I don't want to use any Asset Store asset if it's possible.
There are two models: both are cylinders but they have some deformations (see image ...
- 73
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1
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159
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How do I resolve a collision in SAT-3D when the projection axis is zero?
I am doing SAT in 3D, right now just between cuboids/3D rects (idk the terminology). I have intersection working fully, and static collision works as long as the projection axis is not zero. But if it ...
- 31
1
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209
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Fast self collision/intersection detection algorithm for tetrahedral meshes
I want to play with deformation of tetrahedral mesh (soft-body simulation) but I need help with self-collision detection stuff.
I found SOFA collision detection but I'm not sure that it fits for self-...
- 201
1
vote
1
answer
1k
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Swept AABB: finding collision normal in 3D?
I was following this tutorial which explains how to detect and resolve a 2d swept aabb collisions. I got the detection part working on 3d, but know I need a way to properly make a response, like ...
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1
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2k
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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 ...
- 1,793