As a beginner who wants to write a spirograph program I want to draw a wheel-shape that is transparent, such that the user can see the Spirograph plot which is drawn behind the wheel.

Solution: Windows Colors provide a fourth alpha channel value, which is made for this.

User Story

As a C# beginner I want to a Turtle command that makes it possible for a user to input a text. I need this for my first computer game I want to code with woopec

Solution

Implement something like the textinput and numinput functions in python-turtle

As a programmer who wants to draw a spirograph I use two "turtles": One draws the spirograph plot, the second is the sprirograph-wheel. These two wheels must be in sync.

Solution: New Method Turtle.WaitForCompletedMovementOf(otherTurtle)

Help wanted

Woopec is a library designed to make it easy for C# beginners to learn C#.

If you want to learn C# or teach others C#, you can help me improve Woopec.

Install Woopec and try to write C# turtle graphics programs with it. You can find all information about it here: https://frank.woopec.net/woopec_docs/WoopecIntro.html

After that, please give me feedback on what you like and what can be improved. You can use the Discussions for that.

User Story: As a programmer, I would like the Woopec WPF window to be placed in the same position during debugging as it was during the previous debugging so that I can easily see WPF window and VS debugger side by side.

Perhaps this is a solution: https://github.com/microsoft/WPF-Samples/tree/main/Windows/SaveWindowState. But this code is relatively old, possibly not .NET Core.

As a programming-beginner it is sometimes hard for me to work with the default coordinate system, where the point 0,0 is in the middle of the screen. Therefore: As a programming-beginner I want to specify the coordinates of the corners of the screen.

Solution: Implement something like python's turtle.setworldcoordinates

Problem

If the user has written a woopec-program and tries to debug it, the behaviour is not as excpected. For Instance:

• Program has one line of code turte.Forward(100)
• The user puts a breakpoint on this line, starts the debugger, the debugger stops at the breakpoint, the user executes debug-step over.
• The user expects to see the turtle moving 100 pixels
• But nothing happens.

The reason for this: The movement is implemented with an WPF-animation, which runs in a second thread. Because of debugging this second thread is stopped and the animation is not started.

Solution

In Debug-mode: Start two processes:

• One process executes the turtle commands and can debugged by the user. (This process only uses .NET 6)
• In background start a second process, that draws the woopec-commands on screen. (This process uses WPF).

As a turtle-developer I want to use turtle commands to create a new shape. For instance: I would like to draw a hexagon with turtle commands. Then I want to transform this hexagon into a shape. And after that I want to create a new "turtle", that has this hexagon shape.

Solution: New methods similar to python-turtle BeginPoly, EndPoly.

Problem

At the moment woopec consists of two parts:

• Woopec.core: Contains all Turtle-Commands, is written with .NET 6, therefore usable on Windows, Linux, Max.
• Woopec.wpf: This is the viewer-part of woopec that show the turtle-graphics. Woopec.Wpf is implemented with WPF. Therefore it is only usable an Windows Computers.

Because of this, at the moment Woopec is only usable on Windows-Computers.

Solution Ideas

• AvaloniaUI
• Blazor
• JavaScript and SignalR

Important use cases

The example Woopec.Core.Examples.FeaturesDemo.Run(); contains many features of Woopec. If this example behaves on Linux and MacOS in the same way as it behaves on Windows with WPF (TurtleWpf), a great deal has been achieved.

To make debugging of Woopec programs easier for novice programmers, there is a little magic for this. Details can be found in file .\TurtleCore\InternalDocumentation\003_TwoProcessesForBetterDebugging.md. It is important that this also works on MaxOS and Linux.

Effort

Multiple Days

As a turtle-user I want to use the acutal turtle as a "stamp" which stamps the acutal shape of the turtle on the screen. For instance: The turtle has a hexgon-shape. I can move the turtle to a point on screen and stamp the hexagon to this point on screen.

Solution: Methods similar to python turtle's Stamp and ClearStamp methods