//------------------------------------------------------------------------
unsigned vcgen_dash::vertex(double* x, double* y)
{
unsigned cmd = path_cmd_move_to;
while(!is_stop(cmd))
{
switch(m_status)
{
case initial:
rewind(0);
case ready:
if(m_num_dashes < 2 || m_src_vertices.size() < 2)
{
cmd = path_cmd_stop;
break;
}
m_status = polyline;
m_src_vertex = 1;
m_v1 = &m_src_vertices[0];
m_v2 = &m_src_vertices[1];
m_curr_rest = m_v1->dist;
*x = m_v1->x;
*y = m_v1->y;
if(m_dash_start >= 0.0) calc_dash_start(m_dash_start);
return path_cmd_move_to;
case polyline:
{
double dash_rest = m_dashes[m_curr_dash] - m_curr_dash_start;
unsigned cmd = (m_curr_dash & 1) ?
path_cmd_move_to :
path_cmd_line_to;
if(m_curr_rest > dash_rest)
{
m_curr_rest -= dash_rest;
++m_curr_dash;
if(m_curr_dash >= m_num_dashes) m_curr_dash = 0;
m_curr_dash_start = 0.0;
*x = m_v2->x - (m_v2->x - m_v1->x) * m_curr_rest / m_v1->dist;
*y = m_v2->y - (m_v2->y - m_v1->y) * m_curr_rest / m_v1->dist;
}
else
{
m_curr_dash_start += m_curr_rest;
*x = m_v2->x;
*y = m_v2->y;
++m_src_vertex;
m_v1 = m_v2;
m_curr_rest = m_v1->dist;
if(m_closed)
{
if(m_src_vertex > m_src_vertices.size())
{
m_status = stop;
}
else
{
m_v2 = &m_src_vertices
[
(m_src_vertex >= m_src_vertices.size()) ? 0 :
m_src_vertex
];
}
}
else
{
if(m_src_vertex >= m_src_vertices.size())
{
m_status = stop;
}
else
{
m_v2 = &m_src_vertices[m_src_vertex];
}
}
}
return cmd;
}
break;
case stop:
cmd = path_cmd_stop;
break;
}
}
return path_cmd_stop;
}
//------------------------------------------------------------------------
void vcgen_dash::dash_start(double ds)
{
m_dash_start = ds;
calc_dash_start(fabs(ds));
}
void vcgen_dash::dash_start(FX_FLOAT ds)
{
m_dash_start = ds;
calc_dash_start(FXSYS_fabs(ds));
}
