Mirror / rotate image ( System.Drawing.Graphics / System.Drawing.Drawing2D.Matrix)

[Eduard Witteveen]

Hello list,

I have code the draw MyDrawingObject information on a
System.Drawing.Graphics object. The code is more/less the following:

void MyDrawingObject::Draw(ref System.Drawing.Graphics graphics, ref WindowDrawer windowdrawer)
{
if(_mirror || _rotate != 0) {
// do something here?
}
foreach (drawelements.DrawElement element in _drawelements)
{
if (windowdrawer.LayerActive(element.Layer))
{
element.Draw(ref graphics, ref windowdrawer, _location);
}
)
}

I now want to rotate / mirror the object i draw.
I've looked at the System.Drawing.Drawing2D.Matrix, which can be applied
on the Transform property of the Graphics object, but it will work on
the complete graphics object and there is no mirror method in it.
Can somebody help me do this / give me some pointers?

--
Eduard Witteveen
[phone]
nl_NL fy_NL en_US

[Kevin Spencer]

To mirror an image, first you need to decide whether to mirror it
horizontally or vertically. Once you've done that, you simply draw it a
pixel at a time (use an unsafe code block), in reverse order of rows or
columns.

--
HTH,

Kevin Spencer
Microsoft MVP
Professional Chicken Salad Alchemist

What You Seek Is What You Get.
"Eduard Witteveen" <ne**@nerNOSPAMgens.orgwrote in message
news:44***********************@news.euronet.nl...

Hello list,

I have code the draw MyDrawingObject information on a
System.Drawing.Graphics object. The code is more/less the following:

>void MyDrawingObject::Draw(ref System.Drawing.Graphics graphics, ref
WindowDrawer windowdrawer) {
if(_mirror || _rotate != 0) {
// do something here?
}
foreach (drawelements.DrawElement element in _drawelements)
{
if (windowdrawer.LayerActive(element.Layer))
{
element.Draw(ref graphics, ref windowdrawer, _location);
}
)
}

I now want to rotate / mirror the object i draw.
I've looked at the System.Drawing.Drawing2D.Matrix, which can be applied
on the Transform property of the Graphics object, but it will work on the
complete graphics object and there is no mirror method in it.
Can somebody help me do this / give me some pointers?

--
Eduard Witteveen
[phone]
nl_NL fy_NL en_US

[Eduard Witteveen]

Kevin Spencer schreef:

To mirror an image, first you need to decide whether to mirror it
horizontally or vertically. Once you've done that, you simply draw it a
pixel at a time (use an unsafe code block), in reverse order of rows or
columns.

And i should do the rotation in this same step?
Furthermore, arent their any 3th party libs which i could use?

ps: changed subject...

[Eduard Witteveen]

Kevin Spencer schreef:

To mirror an image, first you need to decide whether to mirror it
horizontally or vertically. Once you've done that, you simply draw it a
pixel at a time (use an unsafe code block), in reverse order of rows or
columns.

And i should do the rotation in this same step?
Furthermore, arent their any 3th party libs which i could use?

ps: changed subject...