//------------------------------------------------------------------------
void gen_stroke::calc_join(const vertex_dist& v0,
const vertex_dist& v1,
const vertex_dist& v2,
double len1, double len2)
{
double dx1, dy1, dx2, dy2;
dx1 = m_width * (v1.y - v0.y) / len1;
dy1 = m_width * (v1.x - v0.x) / len1;
dx2 = m_width * (v2.y - v1.y) / len2;
dy2 = m_width * (v2.x - v1.x) / len2;
m_out_vertices.remove_all();
if(m_line_join == miter_join)
{
calc_miter(v0, v1, v2, dx1, dy1, dx2, dy2);
}
else
{
if(calc_point_location(v0.x, v0.y, v1.x, v1.y, v2.x, v2.y) > 0.0)
{
calc_miter(v0, v1, v2, dx1, dy1, dx2, dy2);
}
else
{
if(m_line_join == round_join)
{
calc_arc(v1.x, v1.y, dx1, -dy1, dx2, -dy2);
}
else
{
m_out_vertices.add(coord_type(v1.x + dx1, v1.y - dy1));
m_out_vertices.add(coord_type(v1.x + dx2, v1.y - dy2));
}
}
}
}
//------------------------------------------------------------------------
unsigned vcgen_contour::vertex(double* x, double* y)
{
bool done = false;
while(!done)
{
switch(m_status)
{
case initial:
rewind(0);
case ready:
if(m_src_vertices.size() < 3)
{
return path_cmd_stop;
}
m_src_vertex = 0;
m_status = outline;
case outline:
if(m_src_vertex >= m_src_vertices.size())
{
m_status = end_poly;
return path_cmd_end_poly | m_orientation | m_closed;
}
if(calc_miter(m_src_vertices.prev(m_src_vertex),
m_src_vertices.curr(m_src_vertex),
m_src_vertices.next(m_src_vertex)))
{
m_status = add_point;
}
++m_src_vertex;
*x = m_x1;
*y = m_y1;
return ((m_src_vertex == 1) ? path_cmd_move_to : path_cmd_line_to);
case add_point:
*x = m_x2;
*y = m_y2;
m_status = outline;
return path_cmd_line_to;
case end_poly:
done = true;
break;
}
}
return path_cmd_stop;
}