inline QuaternionT<T> QuaternionT<T>::Slerp(T t, const QuaternionT<T>& v1) const
{
const T epsilon = 0.0005f;
T dot = Dot(v1);
if (dot > 1 - epsilon) {
QuaternionT<T> result = v1 + (*this - v1).Scaled(t);
result.Normalize();
return result;
}
if (dot < 0)
dot = 0;
if (dot > 1)
dot = 1;
T theta0 = std::acos(dot);
T theta = theta0 * t;
QuaternionT<T> v2 = (v1 - Scaled(dot));
v2.Normalize();
QuaternionT<T> q = Scaled(std::cos(theta)) + v2.Scaled(std::sin(theta));
q.Normalize();
return q;
}
static void resize(int x,int y){
mp_msg(MSGT_VO, MSGL_V, "[gl] Resize: %dx%d\n",x,y);
if (WinID >= 0) {
int top = 0, left = 0, w = x, h = y;
geometry(&top, &left, &w, &h, vo_screenwidth, vo_screenheight);
Viewport(top, left, w, h);
} else
Viewport( 0, 0, x, y );
MatrixMode(GL_PROJECTION);
LoadIdentity();
ass_border_x = ass_border_y = 0;
if (aspect_scaling() && use_aspect) {
int new_w, new_h;
GLdouble scale_x, scale_y;
aspect(&new_w, &new_h, A_WINZOOM);
panscan_calc_windowed();
new_w += vo_panscan_x;
new_h += vo_panscan_y;
scale_x = (GLdouble)new_w / (GLdouble)x;
scale_y = (GLdouble)new_h / (GLdouble)y;
Scaled(scale_x, scale_y, 1);
ass_border_x = (vo_dwidth - new_w) / 2;
ass_border_y = (vo_dheight - new_h) / 2;
}
Ortho(0, image_width, image_height, 0, -1,1);
MatrixMode(GL_MODELVIEW);
LoadIdentity();
if (!scaled_osd) {
#ifdef CONFIG_FREETYPE
// adjust font size to display size
force_load_font = 1;
#endif
vo_osd_changed(OSDTYPE_OSD);
}
Clear(GL_COLOR_BUFFER_BIT);
redraw();
}
//! [12]
QImage scaledToWith(const QImage &image)
//! [12]
//! [13]
QList<QImage> images = ...;
QFuture<QImage> thumbnails = QtConcurrent::mapped(images, std::bind(&QImage::scaledToWidth, 100 Qt::SmoothTransformation));
//! [13]
//! [14]
struct Scaled
{
Scaled(int size)
: m_size(size) { }
typedef QImage result_type;
QImage operator()(const QImage &image)
{
return image.scaled(m_size, m_size);
}
int m_size;
};
QList<QImage> images = ...;
QFuture<QImage> thumbnails = QtConcurrent::mapped(images, Scaled(100));
//! [14]
inline void QuaternionT<T>::Normalize()
{
*this = Scaled(1 / std::sqrt(Dot(*this)));
}
