swarm

in AddRing:

int     swcnt;  // number of vertices in swarm polygon
int     swidx;  // index of swarm polygon's current vertex
int     swrad;  // radius of swarm polygon, in pixels

double  theta = (PI * 2) * (double(swidx) / swcnt);     // can be better optimized
Ring.Shift.x += sin(theta) * swrad;
Ring.Shift.y += cos(theta) * swrad;
swidx++;
swidx %= swcnt;         // can be better optimized

NOTE that this feature requires the skew curve fix (see above), otherwise curves will be horribly distorted.

skew curve fix

Skew distorts curved rings; to avoid this, MakeCurves must use the skewed origin.

wrong:
iorg = CPoint(round(org.x), round(org.y));

correct:
iorg = CPoint(round(xshift), round(yshift));

maximize list control within playlist dialog

void CPlaylistDlg::OnHideControls() 
{
        m_HideControls ^= 1;
        CWnd    *wp = GetWindow(GW_CHILD);
        while (wp != NULL) {
                if (wp != &m_List)
                        wp->ShowWindow(m_HideControls ? SW_HIDE : SW_SHOW);
                wp = wp->GetNextWindow();
        }
        PostMessage(WM_SIZE);
}

void CPlaylistDlg::OnSize(UINT nType, int cx, int cy) 
{
        CToolDlg::OnSize(nType, cx, cy);
        if (m_HideControls) {
                CRect   r;
                GetClientRect(r);
                m_List.MoveWindow(r);
        } else
                m_Resize.OnSize();
}

void CPlaylistDlg::OnShowWindow(BOOL bShow, UINT nStatus) 
{
        CToolDlg::OnShowWindow(bShow, nStatus);
        if (bShow && !m_HideControls)
                m_Resize.OnSize();
}

MIDI support for video functions

Assuming MIDI ranges equal 5 (the default):

Video Select

num     MIDI    Video
pad     Values  Clip
0       0..12   0
1       13..25  1
2       26..38  2
3       39..51  3
4       52..63  4
5       64..76  5
6       77..89  6
7       90..101 7
8       102..114        8
9       115..126        9
.       127     None

Note that a value of 127 disables video. If this is undesirable, set Video Select's MIDI range to 4.99 instead of 5.

Video Blending 

num     MIDI    
pad     Values  Blending        description     ROP code        GDI name
0       0..12   ~Src & Dst      AND inverted source with destination    DSna    
1       13..25  ~Src | Dst      OR inverted source with destination     DSno    MERGEPAINT
2       26..38  Src & ~Dst      AND source with inverted destination    SDna    SRCERASE
3       39..51  Src & ~Dst      OR source with inverted destination     SDno            
4       52..63  Src & Dst       AND source with destination     DSa     SRCAND
5       64..76  Src | Dst       OR source with destination      DSo     SRCPAINT
6       77..89  Src ^ Dst       XOR source with destination     DSx     SRCINVERT
7       90..101 ~(Src & Dst)    AND source with destination, invert result      DSan            
8       102..114        ~(Src | Dst)    OR source with destination, invert result       DSon    NOTSRCERASE
9       115..127        ~(Src ^ Dst)    XOR source with destination, invert result      DSxn            

Video Cycle Length

num     MIDI    Cycle
pad     Values  Length
1       0..12   1
2       13..25  2
3       26..38  3
4       39..51  4
5       52..63  5
6       64..76  6
7       77..89  7
8       90..101 8
9       102..114        9
0       115..127        10

Note that numpad zero sets the cycle length to "all" which is effectively 10.