Make +y UP, Move Origin C# System.Drawing.Graphics

Question

I want the origin to be at the center of my window.

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|     ^      |
|     |      |
|     o----->|
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|____________|

.NET wan

Answer 1

You can continue using ScaleTransform(1, -1) and reset the current transformation temporarily while drawing your text:

// Convert the text alignment point (x, y) to pixel coordinates
PointF[] pt = new PointF[] { new PointF(x, y) };
graphics.TransformPoints(CoordinateSpace.Device, CoordinateSpace.World, pt);

// Revert transformation to identity while drawing text
Matrix oldMatrix = graphics.Transform;
graphics.ResetTransform();

// Draw in pixel coordinates
graphics.DrawString(text, font, brush, pt[0]);

// Restore old transformation
graphics.Transform = oldMatrix;