After choosing an object, how would I’m going about drawing the traces across the object in display screen house.

I do not know on what strategies to make use of. I have to be pointed in the correct path how you’d put these traces/bins across the object after choosing the item utilizing choosing.

I’m studying “Programming an RTS recreation with direct3d”
The guide makes use of Directx 9 and plenty of stuff has modified since then.

That is the code pulled from the guide, however it’s directx 9

D3DXVECTOR2 corner1[] = {D3DXVECTOR2(pmin.x, pmin.y + s), D3DXVECTOR2(pmin.x, pmin.y), D3DXVECTOR2(pmin.x + s, pmin.y)};
                    D3DXVECTOR2 corner2[] = {D3DXVECTOR2(pmax.x - s, pmin.y),
 D3DXVECTOR2(pmax.x, pmin.y), D3DXVECTOR2(pmax.x, pmin.y + s)};
                    D3DXVECTOR2 corner3[] = {D3DXVECTOR2(pmax.x, pmax.y - s), 
D3DXVECTOR2(pmax.x, pmax.y), D3DXVECTOR2(pmax.x - s, pmax.y)};
                    D3DXVECTOR2 corner4[] = {D3DXVECTOR2(pmin.x + s, pmax.y), 
D3DXVECTOR2(pmin.x, pmax.y), D3DXVECTOR2(pmin.x, pmax.y - s)};
            
    
                    ID3DXLine *line = NULL;
                    D3DXCreateLine(System, &line);
                    
            
                    //Draw the 4 corners
                    line->SetWidth(2.0f);
                    line->Start();
                    line->Draw(corner1, 3, 0xffffffff); 
                    line->Draw(corner2, 3, 0xffffffff); 
                    line->Draw(corner3, 3, 0xffffffff); 
                    line->Draw(corner4, 3, 0xffffffff); 
                    line->Finish();