GitLab

added lines and rectangle as drawable; added shader by fixed color; used template for VertexBuffer; added icon for app

VertexShader
PixelShader
IndexBuffer
InputLayout
Topology

If only define triangle, it can display.
Both box and triangle have same pixel shader constant buffer.
Suspect conflict of pixel shader constant buffer.

IndexBuffer and VertexBuffer: 指定的格式与缓冲区大小不匹配

Still have issue in breaking down code to Bindable/Drawable, while in Triangle it fails in link stage.
Only able to init3D and render single color in page.