Rotating rectangles for collisions?

[cubemaster21]

Just as the title says, is there any way that I can rotate the rectangle so that i can still call it for collisions? This is what I've got right now, for reference.
I have standard collisions working, but it's a real pain for corners.

[UprightPath]

Well, I'm pretty sure that someone else can offer you advice about the actual rotation.

However, if you just need to do the collision check in a sort of quick and dirty way? Well, that's pretty easy since you already know their positions, right?

So, you've got three sets of cases for collisions with rectangles:
1) Rotated rect's corner collides with a stationary: Check if any of the four corners appear inside of another rectangle.
2) Stationary rect's corner collides with rotated: Rotate the corner points of the stationary rect to adjust them be on the Axis Bounded to the rotated one, then check like in 1.
3) Edge collision: Only happens when the rotatable rect is rotated at angel % 90 = 0. Handled like an AABB collision.

[The Cure]

cubemaster21, what are you using to check the standard collisions, shape.intersects()? How are you drawing the rectangle, using the Rectangle2D class?

Games published by our own members! Check 'em out!

[cubemaster21]

no, This is all with a standard Rectangle() class. And yes, for collisions, i'm using rectangle.intersects.

[The Cure]

no, This is all with a standard Rectangle() class. And yes, for collisions, i'm using rectangle.intersects.

Try this:

1   2   3   4   5   6   7   8   9   10   11   12   13   14   15

int degree = 90; //desired degree         int rectX = 100, rectY = 100, rectWidth = 150, rectHeight = 100;          Shape rect = new Rectangle(rectX, rectY, rectWidth, rectHeight); //creating the rectangle you want to rotate         Rectangle rect2 = new Rectangle(400, 100, rectWidth, rectHeight); //creating other rectangle to check intersection         AffineTransform transform = new AffineTransform();          //rotate or do other things with the rectangle (shear, translate, scale and so on)         transform.rotate(Math.toRadians(degree), rectX + rectWidth /2, rectY + rectHeight /2); //rotating in central axis         //rect receiving the rectangle after rotate         rect = transform.createTransformedShape(rect);          g2d.draw(rect); //Graphics2D object drawing the rectangle on the screen          //and then check the intersection        if(rect.intersects(rect2)){            //Do something...        }