0
votes
1answer
20 views

Unity 2D, C# - Make object move diagonally by a certain angle?

I have a sprite object which I want to move in 8 directions. Left, Right, Up, Down, Left top, Right top, Left down, Right down. The view is 2D with a isometric projection. The difficulties I am ...
0
votes
1answer
21 views

Incosistent jump, stuttering

I've written this C# code to handle movement in my testing project. The game is supposed to be 2D, some kind of a platformer, just to get me started with Unity. However, it seems there's something odd ...
1
vote
2answers
97 views

How to Calculate Velocity in a 2D space game

I am currently using screenpos.X = (float)(screenpos.X + velocity * Math.Sin(r)); screenpos.Y = (float)(screenpos.Y - velocity * Math.Cos(r)); For my Movement with r being the Rotation in Radians. ...
0
votes
0answers
49 views

Particle friction with variable timestep in XNA

Alright, so I'm working on an engine of sorts in XNA (yes, it's deprecated, I know) and I'm implementing my own particle system. I've defined a "ParticleEffect" such that when it's supplied a GameTime ...
2
votes
1answer
119 views

2D physics rotation w/ XNA

I'm creating a simple game with space ships made of blocks that are all the same size. After having looked at this: Calculating the rotational force of a 2D sprite I have created the following code ...
2
votes
1answer
105 views

How to impale and stack targets correctly according to the collider and its coordinate?

I'm making another simple game, a catch game, where a spawning target game object must be captured using a skewer to impale it. Here how: At the start, the falling object (in red) will fall in a ...
25
votes
5answers
2k views

Simulating pressure in a grid based liquid simulation

I have a 2D grid based water system in my XNA game, we have a method using cellular automata to simulate water falling and spreading. Example of water flowing down a slope: Each tile can contain a ...
0
votes
1answer
149 views

Formula throwing a ball to destination [duplicate]

I am throwing a ball using this: double v, vx, vy, alpha, t2 = 0; if (Keyboard.GetState().IsKeyDown(Keys.Up)) { alpha = MathHelper.ToRadians(60f); v = ...
-1
votes
1answer
679 views

“Car” movement in 2D dimension [closed]

I am searching for a simple tutorial how to add arcade car physics for my game. Exactly same user units behaviour i found in next games: Tank Hero: Laser Wars Death Worm: Video: ...
-1
votes
1answer
124 views

Bullets Spawning in same direction [closed]

I'm using XNA to make a Bullet Hell Shooter game, and I'm running into some troubles when I try to change the direction in which the bullets move. Been trying to debug for awhile, but haven't gotten ...
5
votes
2answers
499 views

Ball bouncing infinitely and constantly

Alright, so I've got hold of some simple physics mechanics, and am currently trying to implement bouncing. Based on the first answer of this question, I've developed the following algorithm: ...
0
votes
1answer
139 views

Separating Axis Theorem fails at certain angles

I'm currently attempting to add an overlap tester for an axis aligned and orientated bounding box but the solution only seems to work accurately when the OBB's angle is between -10 and +10. As the ...
1
vote
1answer
216 views

What is going on in this SAT/vector projection code?

I'm looking at the example XNA SAT collision code presented here: http://www.xnadevelopment.com/tutorials/rotatedrectanglecollisions/rotatedrectanglecollisions.shtml See the following code: private ...
3
votes
3answers
797 views

Moving a body in a specific direction using XNA with Farseer Physics

I have a custom polygon attached to a body, which looks like this: What I am trying to accomplish is getting the body to move according to wherever the tip of the body is. So far this is what I've ...
1
vote
1answer
185 views

2D Physics Engine to Handle Shapes Composed of Multiple Densities XNA

The game I'm working on involves shapes that might be composed of multiple materials in a variety of ways. Let's just take for example a wooden rod with and sizable tip of iron or say a block composed ...
1
vote
2answers
291 views

Building a shape out of two rectangles

I would like to build a body with Farseer out of two rectangles so it looks like this: I am a real beginner, so please describe it carefully. Thanks in advance!
1
vote
2answers
966 views

How do I determine which side of the player has collided with an object?

I have some static bodies (platforms) and a dynamic body (the player) in my world. The collision between them works great, but I would like to know which side of the player (rectangle) collides with ...
1
vote
1answer
406 views

Ball Physics : Bounce height altered by elasticity of ball and bounce surface

I have created a bouncing ball simulator using XNA and I am happy with my use of gravity, acceleration, change of direction and friction/spin. However, I am now at a stage where I would like to ...
1
vote
2answers
1k views

2d engine/library for android in C#

I'm looking for a good 2d engine or library (that supports physics) for Android. I have a restriction - language should be C#. It's not a requirement to use Mono Droid, but it seems that it is an ...
1
vote
1answer
2k views

2D Physics Engine for Platform Games - Riding on a Platform

I have a number of questions relating to using a 2D physics engine in a platform game, but one main one that I'm grappling with at the moment. I managed to somewhat integrate the Physics2D.Net engine ...
4
votes
1answer
385 views

How to balance a ball on a rotating plane?

I'm doing some research and I really don't want a physics engine when a simple mechanism will do. I have a ball that will be balanced on a plane. The ball will always be "stuck" to the plane and ...