Composite image with rotation

[CommanderAlchemy]

Hi, I am trying currently to add image onto another with x and y coordinates and rotation.

w/ followng code:

dropImage.Rotate(45);
baseImage.Composite(dropImage, 
new PointD(drop.GetXCoordinate(), drop.GetYCoordinate()), CompositeOperator.SrcOver);

This will cause a bounding box around the image, causing my original x and y coordinates being off from my original image.
How can I rotate and also keep the coordinates so that I can place the image correctly on top the background image.

I've seen examples of using args, but cannot seem to make it do anything.

baseImage.Composite(dropImage, 
new PointD(drop.GetXCoordinate(), drop.GetYCoordinate()), CompositeOperator.SrcOver, $"-rotate {45}");

[dlemstra]

Can you share the two images?

[CommanderAlchemy]

Can you share the two images?

Sure they are just my test images.

DropImage

BaseImage

The previous image was just a compilation on 3 different rotations. The white background is occurring when using odd degrees but is fixed when using image.BackgroundColor = MagickColors.Transparent; Just kept it to see how the rotation works more easily.

TLDR the second arrow (right one) in the pictures, I want the image to rotate around its coordinates and to be placed where the first arrow is (left one) is. (thats the GetY/XCoordinates) I got stored.

Right now the only way I can think of is to do some trigonometry to calculate x and y based on the angle baseWidth/Height and Width/Height + rotation but it feels a bit overkill.

[CommanderAlchemy]

Any ideas @dlemstra?
I looked into using Distort SRT but the result looks odd (some weird artifacts) but would be great if this is something I can do at compositing and just tell it to rotate then and there.

[dlemstra]

I haven't had time to check this yet.

[dlemstra]

There is no build-in way to do this inside ImageMagick you will be forced to do the math yourself:

var angle = 45;
var radians = Math.PI * 45 / 180.0;
var offset = dropImage.Height * Math.Sin(radians);

dropImage.BackgroundColor = MagickColors.Transparent;
dropImage.Rotate(angle);

var position = new PointD(drop.GetXCoordinate() - offset, drop.GetYCoordinate());
baseImage.Composite(dropImage, position, CompositeOperator.SrcOver);

[CommanderAlchemy]

Hi thanks for this sorry for the late reply. This works for some angles but not all.
My trigonometry is a bit lacking here but how should I handle all possible 360 degrees?

[dlemstra]

I will leave that up to you. This is something that is not related to this library.