// ============================================================================
// Draw points and curves
// ============================================================================
void CBezierWnd::Draw()
{
// Draw control point handles and labels
for ( PointSetIt i = m_Points.begin(); i != m_Points.end(); ++i )
{
DrawHandle( *i );
DrawLabel( *i );
}
if ( m_Points.size() < 3)
return;
// Draw curve
PointList lPoints;
for ( PointSetIt i = m_Points.begin(); i != m_Points.end(); ++i )
lPoints.push_back( *i );
CPoint2D p2DStart = *m_Points.begin();
float fStep = 1.f / ( 10.f * ( float ) lPoints.size() );
for ( float i = 0.f; i <= 1.f; i+= fStep )
{
CPoint2D p2D = GetBezierPoint( lPoints, i );
DrawLine( p2DStart, p2D );
p2DStart = p2D;
}
DrawLine( p2DStart, lPoints.back() );
// Draw control polygon
if ( m_bDrawPoly )
{
PointSetIt i = m_Points.begin(), iPrev = i++;
do {
DrawLine( *iPrev, *i );
iPrev = i++;
} while ( i != m_Points.end() );
}
}
void CTrack::DrawHandles(HDC hDC, bool bOn, CPoint* pCorners)
{
CPoint ptRotate(0,0);
CPoint ptCenter(0,0);
for (int h = 0; h < NUM_HANDLES; h++)
{
if (!m_iHandleInUse[h])
continue;
switch (h)
{
case H_UL:
case H_UR:
case H_LR:
case H_LL:
{
int i = h - H_UL;
m_hHandleRects[h].left = pCorners[i].x;
m_hHandleRects[h].top = pCorners[i].y;
break;
}
case H_TOP:
{
m_hHandleRects[h].left = (pCorners[0].x + pCorners[1].x)/2;
m_hHandleRects[h].top = (pCorners[0].y + pCorners[1].y)/2;
break;
}
case H_RIGHT:
{
m_hHandleRects[h].left = (pCorners[1].x + pCorners[2].x)/2;
m_hHandleRects[h].top = (pCorners[1].y + pCorners[2].y)/2;
break;
}
case H_BOTTOM:
{
m_hHandleRects[h].left = (pCorners[2].x + pCorners[3].x)/2;
m_hHandleRects[h].top = (pCorners[2].y + pCorners[3].y)/2;
break;
}
case H_LEFT:
{
m_hHandleRects[h].left = (pCorners[3].x + pCorners[0].x)/2;
m_hHandleRects[h].top = (pCorners[3].y + pCorners[0].y)/2;
break;
}
case H_ROTATE:
{
m_Matrix.Transform(m_ptRotate, m_hHandleRects[h].left, m_hHandleRects[h].top);
m_ViewToDeviceMatrix.Transform((CPoint&)m_hHandleRects[h].left);
ptRotate.x = m_hHandleRects[h].left;
ptRotate.y = m_hHandleRects[h].top;
break;
}
case H_CENTER:
{
m_Matrix.Transform(m_ptCenter, m_hHandleRects[h].left, m_hHandleRects[h].top);
m_ViewToDeviceMatrix.Transform((CPoint&)m_hHandleRects[h].left);
ptCenter.x = m_hHandleRects[h].left;
ptCenter.y = m_hHandleRects[h].top;
break;
}
case H_CORNER_UL:
case H_CORNER_UR:
case H_CORNER_LR:
case H_CORNER_LL:
{
int i = h - H_CORNER_UL;
m_Matrix.Transform(m_Distort.p[i], m_hHandleRects[h].left, m_hHandleRects[h].top);
m_ViewToDeviceMatrix.Transform((CPoint&)m_hHandleRects[h].left);
break;
}
default:
break;
}
m_hHandleRects[h].left -= (H_SIZE/2);
m_hHandleRects[h].top -= (H_SIZE/2);
m_hHandleRects[h].right = m_hHandleRects[h].left + H_SIZE;
m_hHandleRects[h].bottom = m_hHandleRects[h].top + H_SIZE;
DrawHandle(hDC, &m_hHandleRects[h], h >= H_CENTER, bOn);
}
if (ptRotate.x || ptRotate.y || ptCenter.x || ptCenter.y)
DrawLine(hDC, ptCenter.x, ptCenter.y, ptRotate.x, ptRotate.y, bOn);
}
