ProtoDraw with DirectN

A prototyping with DirectN using WinUI3 desktop for some draw application.

Very thanks to Simon Mourier san.

usage

1. open in VisualStudio 2022 and restore NuGet packages.
2. Invoke in Debug mode. If you hit trouble, please check the Shader.hlsl is copied to correct location and the code is in ASCII.
3. select "Dx11Renderer" page in navigation menu located in left pane.
4. There should be appeared triangle. This is initial data in vertex array. (primitive is "Line list", not Triangle)
5. (Don't forget to) Push [Draw Line] button on right pane. It starts tiny 'line add' state machine. To stop it, push [Select] button (the mouse picking has not been implemented, yet).
6. In "line add" state machine, every mouse left click adds some vertex data (in float). The count of data is on right pane. A push and release left button add one line.
7. It should add a line (means two vertecies) every "Mouse_Press - Mouse_Move- Mouse_Release" events. Blue line shows it as rubber band and fixed line is in white.
8. Mouse wheel rotation makes bigger/smaller view.
9. pressing mouse center button, the point comes to the center of screen. (scroll has not been implemented, yet.)

repro error

• currently, seems no fatal errors.

known bug

• changing windows size does not invoke swap chain resize. Repeating resizing action fix this.

issue

• (This is limit of DirectX, not DirectN.) In this program, a vertex contains 12 float number. (pos, nor, tex, color : 48byte) With this vertecies, the limit of dynamic vertex buffer seems about 14000 vertecies on Intel J4125 (8GB memory). A line takes 2 vertecies, then only about 7000 lines available. Need some memory operation, like that using static buffer. (aside from considering other draw primitive, buffers.)

code

• The renderer is located in Renderers\Dx11Renderer2.cs. it has a MapVertexData() where cause memory access violation.
• The data provider is Model\SimpleDrawLineManager.cs. At the top of the code has VertexData property which should be mapped as vertex data in renderer.
• The current control center is ViewModels\DirectNPage2ViewModel.

next

• move current line draw steps into some kind of state machine build with class.