AntiAlias

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Guest

I'm a VB.NET "newbie". I want to use AntiAlias, but every thing that I try
the compiler doesn't like. Sometimes it will suggest a change, but when I
change it, it doesn't like that either! Weird! I can't win!

So far, I have "Dim objSmoothing AS
System.Drawing.Drawing2D.SmoothingMode.AntiAlias". On the next line I have
"objSmoothing =" No matter what I try after the equals sign, the compiler
doesn't like it!

So, what do I put after the equals sign that the compiler will like & not
complain about? Thank you. David
 
Hello, David,

That seems odd to me. The compiler "should" be complaining about the
first line instead.

Rather than being a type, "AntiAlias" is one of the values of the
SmoothingMode enumeration. Try the following instead:

Dim objSmoothing As System.Drawing.Drawing2D.SmoothingMode
objSmoothing = Drawing2D.SmoothingMode.AntiAlias

Cheers,
Randy
 
Alright! Your suggestion worked! The compiler didn't complain! Now how do I
use it?

Here's the situation. I've created a demo program that draws various sizes
of circles & ellipses in random locations on the form. Sometimes, I see
"jaggies". Where in the code do I use the "objSmoothing"?

Here follows the code from the button_Click event:

Dim CircleWidth As Integer
Dim CircleHeight As Integer
Dim CenterX As Integer
Dim CenterY As Integer
Dim RedColor As Integer
Dim GreenColor As Integer
Dim BlueColor As Integer
Dim Transparency As Integer

Dim objGraphics As Graphics
objGraphics = Me.CreateGraphics

' Dim objSmoothing As System.Drawing.Drawing2D.SmoothingMode
' objSmoothing = Drawing2D.SmoothingMode.AntiAlias

Dim objRandom As System.Random

' Initialize the Random object
objRandom = New Random(Now.Millisecond)

Transparency = objRandom.Next(0, 256)
CircleWidth = objRandom.Next(0, 10)
CircleHeight = objRandom.Next(0, 10)
CenterX = objRandom.Next(0, 1279)
CenterY = objRandom.Next(0, 1023)
RedColor = objRandom.Next(0, 256)
GreenColor = objRandom.Next(0, 256)
BlueColor = objRandom.Next(0, 256)

Dim DrawingPen As Pen

' DrawingPen = New Pen(Color.FromArgb(Transparency, RedColor, GreenColor,
BlueColor), 5)
DrawingPen = New Pen(Color.FromArgb(RedColor, GreenColor, BlueColor), 5)

Dim Index As Integer

For Index = 1 To 10000
' System.Threading.Thread.Sleep(100)
' Me.CreateGraphics.DrawEllipse(DrawingPen, CenterX, CenterY,
CircleWidth, CircleHeight)
Me.CreateGraphics.DrawEllipse(DrawingPen, CenterX, CenterY,
CircleWidth, CircleHeight)
CenterX = objRandom.Next(0, 1279)
CenterY = objRandom.Next(0, 1023)
RedColor = objRandom.Next(0, 256)
GreenColor = objRandom.Next(0, 256)
BlueColor = objRandom.Next(0, 256)
Next Index

Some of the comments are because I'm experimenting.

I tried adding the "objSmoothing" to the end of the For...Next, but the
compiler complained.

So, where in the code do I add the "objSmoothing"?

Thank you.

David
 
pcnerd said:
Alright! Your suggestion worked! The compiler didn't complain! Now how do
I
use it?

Here's the situation. I've created a demo program that draws various sizes
of circles & ellipses in random locations on the form. Sometimes, I see
"jaggies". Where in the code do I use the "objSmoothing"?

Here follows the code from the button_Click event:

Dim CircleWidth As Integer
Dim CircleHeight As Integer
Dim CenterX As Integer
Dim CenterY As Integer
Dim RedColor As Integer
Dim GreenColor As Integer
Dim BlueColor As Integer
Dim Transparency As Integer

Dim objGraphics As Graphics
objGraphics = Me.CreateGraphics

' Dim objSmoothing As System.Drawing.Drawing2D.SmoothingMode
' objSmoothing = Drawing2D.SmoothingMode.AntiAlias
Click to expand...

\\\
objGraphics.SmoothingMode = SmoothingMode.AntiAlias
///
objRandom = New Random(Now.Millisecond)
Click to expand...

Simply call the parameterless constructor here!
 
2 questions

You added the following code - "objGraphics.SmoothingMode =
SmoothingMode.AntiAlias". The compiler didn't like it!

You also stated - "Simply call the parameterless constructor here!" Where is
"here"?

Thank you. David
 
pcnerd said:
You added the following code - "objGraphics.SmoothingMode =
SmoothingMode.AntiAlias". The compiler didn't like it!
Click to expand...

You will have to add 'Imports System.Drawing.Drawing2D' on top of the source
file.
You also stated - "Simply call the parameterless constructor here!" Where
is
"here"?
Click to expand...

\\\
Dim r As New Random()
///

You don't need to pass the current time to the constructor.
 
Hello, David,

Re:
I give up. VB.NET is too complicated for me. I'm going back to VB6!
Click to expand...

That will probably prove to be a mistake. Presumably you already "know"
VB6. This is, no doubt, because you have invested a lot of time and
effort learning it.

You need to understand that VB.Net is a substantially different language
than VB6. Therefore you must also be prepared to invest significant
effort in learning it.

I'd advise against "giving up". I think that you'll find the effort
required is well spent.

Cheers,
Randy
 
There are things that I like in VB6 that aren't available in VB.NET. For
example, with Pset I can plot individual pixels. I created a demo program in
VB6 that plots math functions. I can see the individual pixels. VB.NET
doesn't have Pset so there's no way to plot individual pixels. I have to
create circle of 1 pixel width & 1 pixel height. The VB.NET program that I'm
trying to do shows the circles as tiny boxes. In my VB6 program, I can see
the individual pixels & they are smaller than the boxes. In VB6, it's easy to
create a custom coordinate system (like the origin in the center of the
form). In VB.NET, it isn't. Every time that I hope to have a solution to a
problem, another problem comes up. For instance, someone explained how to use
AntiAlias so the compiler wouldn't complain. Somebody else suggested
something else so I tried it & the compiler complained. I can't win. I'm not
a patient person. Another thing that I don't like about VB.NET is that the
..NET Framework has to be installed before VB will run. I know that the .NET
Framework can be installed as part of the Setup. That's not a problem with
VB6. Just run the deployment wizard & put the program on a floppy or CD.

And Microsoft thinks that VB.NET is an improvement over VB6? Not in my
opinion.

Maybe I'll give VB.NET another try & maybe I won't.
 
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