Tagged Questions
0
votes
0answers
36 views
Calculating the position of an object with regards to current position using OpenGL like matrices
i have a 1st person camera that collides with walls, i also have a small sphere in front of my camera denoted by the camera position plus the distance ahead. I cannot get the postion of the sphere but ...
0
votes
1answer
63 views
Normalizing the direction to check if able to move
i have a a room with 4 walls along the x and z axis respectively. My player who is in first person (therefore the camera) should have collision detection with these walls. I'm relatively new to this ...
5
votes
1answer
210 views
Why doesn't Unity's OnCollisionEnter give me surface normals, and what's the most reliable way to get them?
Unity's on collision event gives you a Collision object that gives you some information about the collision that happened (including a list of ContactPoints with hit normals).
But what you don't get ...
4
votes
3answers
189 views
How to get distance from point to line with distinction between side of line?
I'm making a 2d racing game. I'm taking the nice standard approach of having a set of points defining the center of the track and detecting whether the car is off the track by detecting its distance ...
5
votes
2answers
195 views
How to make my character slide (not bounce) off a slope
My character needs to slide and not bounce off a slope.
The solutions I found here use a Reflection vector, but they make my character bouncy when they run downwards a slope.
var reflectVector = ...
0
votes
0answers
137 views
Java Collision Detection of a Slope using a Gradient
Im testing out collision detection for a game, The ball is traveling and i need to know when the ball hits a sloped line.
For this example i have used the whole screen, with a sloped line going from ...
1
vote
0answers
59 views
obb vs obb and resolve/response for 2d space game [closed]
Possible Duplicate:
OBB vs OBB Collision Detection
How can i detect if an rotated obb intersects another
rotated obb and resolve it so both obb objects dont go further into each other.
I ...
-1
votes
2answers
204 views
How should I learn about collision detection?
If I want to use physics engine for my game then how should I go to learn collision-detection algorithms?
When I read AI book for games, the book talks about collision detection, so I want to learn ...
0
votes
3answers
291 views
Checking for collisions on a 3D heightmap
I have a 3D heightmap drawn using OpenGL (which isn't important). It's represented by a 2D array of height data. To draw this I go through the array using each point as a vertex. Three vertices are ...
0
votes
0answers
116 views
way to do if(x > x2) x = x2 with rotation?
Alright, so I got this walking code, and some collision detection, now the collision detection returns a Vector3f of the closest point on the triangle that the projected position is at (pos + move), ...
0
votes
2answers
220 views
Collision, then what?
I know how to check collision for example 2 spheres. But my question is how do I use the collsion response in a good way?
How do I make my character unable to walk in to the Sphere? I've got to the ...
6
votes
3answers
349 views
How can I do fast Triangle/Square vs Triangle collision detection?
I have a game world where the objects are in a grid based environment with the following restrictions.
All of the triangles are 45-90-45 triangles that are unit length. They can only rotate 90°. The ...
3
votes
3answers
257 views
How do I approach this collision model?
This is the game level prototype I have already implemented. It has few objects per room to allow me to finally add some collision detection/response code into it.
VIDEO
As you can probably see, ...
3
votes
1answer
408 views
AABB - AABB Collision, which face do I hit?
To allow my objects to slide when they collide, I need to :
Know which face of the AABB they collide with.
Calculate the normal to that face.
Return the normal and calculate the impulse that to ...
2
votes
2answers
318 views
0
votes
2answers
444 views
Ways to define a curve
I'm trying to give shapes in my physics engine roundness/ curvature.
I am aware of various methods for mathematically defining curves; such as bezier-cruves, ellipses, etc. However I am not sure ...
9
votes
1answer
204 views
Deforming surfaces
I try to accomplish an deforming physic behaviour for levelsurfaces, but don't get an idea how to start with the implemenation so far.
Regardless of the shape from the surface (planes, cubes, ...
1
vote
1answer
646 views
Line segment / circle intersection - X value seems wrong?
Major Edit
I'm making a Breakout clone, and having difficulty with collision detection between a circle and line segment.
Apologies, my earlier question was a result of frustration and no sleep :)
...
6
votes
1answer
1k views
Circle-Line Collision Detection Problem
I am currently developing a breakout clone and I have hit a roadblock in getting collision detection between a ball (circle) and a brick (convex polygon) working correctly. I am using a Circle-Line ...
0
votes
1answer
305 views
What maths should I learn for game programming, and what aspect of programming does it relate to? [closed]
Possible Duplicate:
What math should all game programmers know?
Obviously a good knowledge of maths is essential for good programming, my maths isn’t the best ( I didn’t pay attention in ...
24
votes
3answers
2k views
A ball hits the corner, where will it deflect?
I need to brush up my trigonometry and hope you can help here with a simple mathematical model. Here is my model so far in the image attached. I am aware that the frame animation has other problems ...
0
votes
3answers
1k views
Voronoi regions of a (convex) polygon
I'm looking to add circle-polygon collisions to my Separating Axis Theorem collision detection.
The metanet software tutorial (http://www.metanetsoftware.com/technique/tutorialA.html#section3) on ...
4
votes
2answers
377 views
How to detect and collide two elastic line segments?
There are 4 moving physical nodes in 3D space. They are paired with two elastic line segments / strings (1 <-> 2; 3 <-> 4).
Part I: How to detect the collision of two segments?
Part II: On the ...
5
votes
1answer
567 views
How to calculate new direction after sprite collision
The scenario as you can see in the picture. A ball will be hitting a surface and I want to fairly correctly get the new angle after the collision..
I expect to know the X,Y coordinates of the lines ...
6
votes
3answers
821 views
Implementing 2D CSG (for collision shapes)?
Are there any simple (or well documented) algorithms for basic CSG operations on 2D polygons?
I'm looking for a way to 'add' a number of overlapping 2D collision shapes. These may be convex or ...
16
votes
3answers
656 views
Building a Plattformer - How to determine if a player is allowed to jump?
I'm building a simple Plattformer Jump n' Run Style game. I do not use tiles - instead i've geometrical shapes for my level entities (and the player is one too). I finished my collision detection code ...
