Imath::V3f transform3_param_t::get_center_at_frame( float frame) const
{
if( image_mode())
{
Imath::V2f xy = get_absolute_value_at_frame<Imath::V2f>( center_xy_param(), frame);
float z = get_value_at_frame<float>( center_z_param(), frame);
return Imath::V3f( xy.x, xy.y, z);
}
else
return get_value_at_frame<Imath::V3f>( center_param(), frame);
}
boost::optional<Imath::M33d> transform2_param_t::matrix_at_time( float time, int subsample) const
{
const double deg2rad = 0.01745329251;
Imath::V2f s = get_value_at_time<Imath::V2f>( scale_param(), time);
if( s.x == 0.0f && s.y == 0.0f)
return boost::optional<Imath::M33d>();
Imath::V2f c = get_absolute_value_at_time<Imath::V2f>( center_param(), time);
Imath::V2f t = get_value_at_time<Imath::V2f>( translate_param(), time) / (float) subsample;
float angle = get_value_at_time<float>( rotate_param(), time);
Imath::M33d m = Imath::M33d().setTranslation( -c) *
Imath::M33d().setScale( s) *
Imath::M33d().setRotation( angle * deg2rad) *
Imath::M33d().setTranslation( c + t);
return boost::optional<Imath::M33d>( m);
}
boost::optional<Imath::M33d> transform2_param_t::xform_blur_matrix_at_time( float time, float t, int subsample) const
{
const double deg2rad = 0.01745329251f;
Imath::V2f s = get_value_at_time<Imath::V2f>( scale_param(), time);
if( s.x == 0.0f && s.y == 0.0f)
return boost::optional<Imath::M33d>();
Imath::V2f c = get_absolute_value_at_time<Imath::V2f>( center_param(), time);
Imath::V2f d = get_value_at_time<Imath::V2f>( translate_param(), time) / (float) subsample;
float angle = get_value_at_time<float>( rotate_param(), time);
s = Imath::lerp( Imath::V2f( 1, 1), s, t);
d = Imath::lerp( Imath::V2f( 0, 0), d, t);
angle = Imath::lerp( 0.0f, angle, t);
Imath::M33d m = Imath::M33d().setTranslation( -c) *
Imath::M33d().setScale( s) *
Imath::M33d().setRotation( angle * deg2rad) *
Imath::M33d().setTranslation( c + d);
return boost::optional<Imath::M33d>( m);
}