void CDrawShapeView::OnMouseMove(UINT nFlags, CPoint point)
{
CBaseView::OnMouseMove(nFlags, point);
MgCommand* cmd = mgGetCommandManager()->getCommand();
m_proxy->motion.dragging = (!m_delayUp && (nFlags & MK_LBUTTON)
&& (m_downFlags & MK_LBUTTON));
if (m_proxy->motion.dragging)
{
m_proxy->motion.point = Point2d((float)point.x, (float)point.y);
m_proxy->motion.pointM = m_proxy->motion.point * m_graph->xf.displayToModel();
if (!m_moved && mgHypot(m_proxy->motion.point.x - m_proxy->motion.startPoint.x,
m_proxy->motion.point.y - m_proxy->motion.startPoint.y) > 5)
{
m_moved = TRUE;
if (cmd) cmd->touchBegan(&m_proxy->motion);
}
else if (m_moved)
{
if (cmd) cmd->touchMoved(&m_proxy->motion);
}
m_proxy->motion.lastPoint = m_proxy->motion.point;
m_proxy->motion.lastPointM = m_proxy->motion.pointM;
}
else if (cmd && !(nFlags & MK_LBUTTON))
{
cmd->mouseHover(&m_proxy->motion);
}
}
bool mgcurv::arcTan(
const Point2d& start, const Point2d& end, const Vector2d& startTan,
Point2d& center, float& radius,
float* startAngle, float* sweepAngle)
{
float a, b, c;
// 弦的中垂线方程系数
a = end.x - start.x;
b = end.y - start.y;
c = -0.5f * (a*(end.x + start.x) + b*(end.y + start.y));
// 求中垂线和切线的交点center
if (!mglnrel::crossLineAbc(a, b, c, startTan.x, startTan.y,
-startTan.x * start.x - startTan.y * start.y, center, Tol::gTol()))
return false;
radius = mgHypot(center.x - start.x, center.y - start.y);
if (startAngle && sweepAngle)
{
float sa = atan2f(start.y - center.y, start.x - center.x);
float ea = atan2f(end.y - center.y, end.x - center.x);
*startAngle = sa;
if (startTan.crossProduct(start - center) > 0.f)
*sweepAngle = -mgbase::to0_2PI(sa - ea);
else
*sweepAngle = mgbase::to0_2PI(ea - sa);
}
return true;
}
bool mgcurv::arc3P(
const Point2d& start, const Point2d& point, const Point2d& end,
Point2d& center, float& radius,
float* startAngle, float* sweepAngle)
{
float a1, b1, c1, a2, b2, c2;
a1 = end.x - start.x;
b1 = end.y - start.y;
c1 = -0.5f * (a1 * (end.x + start.x) + b1 * (end.y + start.y));
a2 = end.x - point.x;
b2 = end.y - point.y;
c2 = -0.5f * (a2 * (end.x + point.x) + b2 * (end.y + point.y));
if (!mglnrel::crossLineAbc(a1, b1, c1, a2, b2, c2, center, Tol::gTol()))
return false;
radius = mgHypot(center.x - start.x, center.y - start.y);
if (startAngle && sweepAngle)
{
// 分别计算圆心到三点的角度
float a = atan2f(start.y - center.y, start.x - center.x);
float b = atan2f(point.y - center.y, point.x - center.x);
float c = atan2f(end.y - center.y, end.x - center.x);
*startAngle = a;
// 判断圆弧的方向，计算转角
if (a < c)
{
if (a < b && b < c) // 逆时针
*sweepAngle = c - a;
else
*sweepAngle = c - a - _M_2PI;
}
else
{
if (a > b && b > c) // 顺时针
*sweepAngle = c - a;
else
*sweepAngle = _M_2PI-(a-c);
}
}
return true;
}
bool Matrix2d::isEqualTo(const Matrix2d& mat, const Tol& tol) const
{
return mgHypot(m11 - mat.m11, m12 - mat.m12) <= tol.equalVector()
&& mgHypot(m21 - mat.m21, m22 - mat.m22) <= tol.equalVector()
&& mgHypot(dx - mat.dx, dy - mat.dy) <= tol.equalVector();
}
float Matrix2d::scaleY() const
{
return mgIsZero(m21) ? fabsf(m22) : mgHypot(m21, m22);
}
float Matrix2d::scaleX() const
{
return mgIsZero(m12) ? fabsf(m11) : mgHypot(m11, m12);
}
float Matrix2d::scale() const
{
float sx = scaleX();
float sy = scaleY();
return fabsf(sx - sy) < _MGZERO ? sx : mgHypot(sx, sy);
}
float MgBaseRect::getDiagonalLength() const
{
return mgHypot(getWidth(), getHeight());
}
