mmbelkiman/xna-monogame-sat-system

collision with SAT to use with XNA / Monogame

XNA Monogame Sat System

Class created to work together with Monogame, is a simple implementation of a rectangle with rotation and collision using SAT (Separating Axis Theorem))

Feel free to change what you need, if you have ideas for improvement, contact and share =]

Created by:

• Mauricio Terra (@mauriciomta) [email protected]
• Marcelo Belkiman (@mmbelkiman) [email protected]

Installation

Copy file RotatedRectangle.cs, Circle.cs, CollideObj.cs to your project. Yeah, thats all. (need Monogame/XNA)

Example

You can see Game1.cs to see how to use

How to use

Create a new rotateionRectangle

 rotatedRectangleA = new RotatedRectangle(
                GraphicsDevice,
                position,
                originPoint,
                width, 
                heigth);

At Update do a update

rotatedRectangleA.Update();

If you want to rotate, do:

rotatedRectangleA.rotation = newRotationValue;

You can use a static function DegreeToRadian to help you a rotate

rotatedRectangleA = RotateRectangle.DegreeToRadian(80);

To check a collision do

rotatedRectangleA.Collide(rotatedRectangleB)

You can change collor if has collision

if (rotatedRectangleA.Collide(rotatedRectangleB))
    rotatedRectangleA.SetColor(new Color(255, 0, 0));
else
    rotatedRectangleA.SetColor(new Color(0, 255, 0, 200));

Do Draw at Draw

spriteBatch.Begin();
    rotatedRectangleA.Draw(spriteBatch);
spriteBatch.End();

License

Under MIT license