Rectangle Entity collison with a Block Entity

[RyanAelen]

Made basic implementation of a Sprite colliding with Wall/Floor/Ceiling and preventing it from moving into it.

public class Player extends DynamicRectangleEntity implements Collided{

    @Override
    public void onCollision(Collider collider) {
        if (collider instanceof Block) {
            var box = collider.getBoundingBox();
            BoundingBox top = new BoundingBox(box.getMinX() + 2, box.getMinY(), box.getWidth() - 4, 2);
            BoundingBox bottom = new BoundingBox(box.getMinX() + 2, box.getMaxY() - 2, box.getWidth() - 4, 2);
            BoundingBox left = new BoundingBox(box.getMinX(), box.getMinY() + 2, 2, box.getHeight() - 4);
            BoundingBox right = new BoundingBox(box.getMaxX() - 2, box.getMinY() + 2, 2, box.getHeight() - 4);

            if (top.intersects(this.getBoundingBox())) {
                setAnchorLocationY(box.getMinY() - getHeight());
//                this.nullifySpeedInDirection(Direction.DOWN); // If your using gravity.
            }
            if (bottom.intersects(this.getBoundingBox())) {
                setAnchorLocationY(box.getMaxY());
            }
            if (left.intersects(this.getBoundingBox())) {
                setAnchorLocationX(box.getMinX() - getWidth());
            }
            if (right.intersects(this.getBoundingBox())) {
                setAnchorLocationX(box.getMaxX());
            }

        }

    }
    @Override
    public void checkForCollisions(List<Collider> colliders) {
        if (colliders != null && !colliders.isEmpty()) {
            Iterator var2 = colliders.iterator();

            while (var2.hasNext()) {
                Collider collider = (Collider) var2.next();
                if (!this.equals(collider) && this.getBoundingBox().intersects(collider.getBoundingBox())) {
                    this.onCollision(collider);
//                    break;
                }
            }
        }
    }
}

2022-04-21.23-00-08-1.mp4

Have hide off-topic parts of the class

[RyanAelen]

Applied changes for the 2021.2022.4-SNAPSHOT

    @Override
    public void onCollision(List<Collider> colliders) {
        for (Collider collider : colliders
        ) {
            if (collider instanceof IBlocks) {
                var box = collider.getBoundingBox();
                BoundingBox top = new BoundingBox(box.getMinX() + 2, box.getMinY(), box.getWidth() - 4, 2);
                BoundingBox bottom = new BoundingBox(box.getMinX() + 2, box.getMaxY() - 2, box.getWidth() - 4, 2);
                BoundingBox left = new BoundingBox(box.getMinX(), box.getMinY() + 2, 2, box.getHeight() - 8);
                BoundingBox right = new BoundingBox(box.getMaxX() + 2, box.getMinY() + 2, 2, box.getHeight() - 8);

                if (top.intersects(this.getBoundingBox())) {
                    setAnchorLocationY(box.getMinY() - getHeight());
//                    this.nullifySpeedInDirection(Direction.DOWN); // If you're using gravity.
                    grounded = true;
                }
                if (bottom.intersects(this.getBoundingBox())) {
                    setAnchorLocationY(box.getMaxY());
                }
                if (left.intersects(this.getBoundingBox())) {
                    setAnchorLocationX(box.getMinX() - getWidth());
                }
                if (right.intersects(this.getBoundingBox())) {
                    setAnchorLocationX(box.getMaxX());

                }

            }
        }
    }

Note: the Override for checkForCollisions is not necessary anymore

[meronbrouwer]

Nice work @RyanAelen . This could be added to the ShowCase project as a nice reference.