bool ON_3dPointArray::Rotate(
double sin_angle,
double cos_angle,
const ON_3dVector& axis_of_rotation,
const ON_3dPoint& center_of_rotation
)
{
const int count = m_count;
ON_Xform rot;
rot.Rotation( sin_angle, cos_angle, axis_of_rotation, center_of_rotation );
ON_SimpleArray<int> fix_index(128);
int i;
for ( i = 0; i < count; i++ ) {
if ( m_a[i] == center_of_rotation )
fix_index.Append(i);
}
const bool rc = Transform( rot );
for ( i = 0; i < fix_index.Count(); i++ ) {
m_a[fix_index[i]] = center_of_rotation;
}
return rc;
}
void parse_f_statement()
{
clear_keep_memory(m_face_vertex_indices);
clear_keep_memory(m_face_tex_coord_indices);
clear_keep_memory(m_face_normal_indices);
while (true)
{
m_lexer.eat_blanks();
if (m_lexer.is_eol())
break;
//
// Recognized (epsilon)
// Accept n
//
{
const long n = m_lexer.accept_long();
const size_t v = fix_index(n, m_vertices.size());
m_face_vertex_indices.push_back(v);
}
//
// Recognized n
// Accept (epsilon), /
//
{
const unsigned char c = m_lexer.get_char();
if (m_lexer.is_space(c))
continue;
else if (c == '/')
m_lexer.next_char();
else parse_error();
}
//
// Recognized n/
// Accept /, n
//
{
const unsigned char c = m_lexer.get_char();
if (c == '/')
{
m_lexer.next_char();
goto skip;
}
else
{
const long n = m_lexer.accept_long();
const size_t vt = fix_index(n, m_tex_coords.size());
m_face_tex_coord_indices.push_back(vt);
}
}
//
// Recognized n/n
// Accept (epsilon), /
//
{
const unsigned char c = m_lexer.get_char();
if (m_lexer.is_space(c))
continue;
else if (c == '/')
m_lexer.next_char();
else parse_error();
}
skip:
//
// Recognized n//, n/n/
// Accept (epsilon), n
//
{
const unsigned char c = m_lexer.get_char();
if (m_lexer.is_space(c))
continue;
else
{
const long n = m_lexer.accept_long();
const size_t vn = fix_index(n, m_normals.size());
m_face_normal_indices.push_back(vn);
}
}
}
// Check whether the face is well-formed.
const size_t vc = m_face_vertex_indices.size();
const size_t tc = m_face_tex_coord_indices.size();
const size_t nc = m_face_normal_indices.size();
const bool well_formed =
vc >= 3
&& (tc == 0 || tc == vc)
&& (nc == 0 || nc == vc);
if (well_formed)
{
// The face is well-formed, insert it into the mesh.
insert_face_into_mesh();
}
else
{
// The face is ill-formed, ignore it or abort parsing.
if (m_options & StopOnInvalidFaceDef)
throw ExceptionInvalidFaceDef(m_lexer.get_line_number());
}
}
