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z Stack description language enhanced.

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This commit is contained in:
Matthias Koefferlein
2021-04-02 17:27:38 +02:00
parent 25b978f39f
commit 773fcb6b67
4 changed files with 188 additions and 49 deletions
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src/plugins/tools/view_25d/lay_plugin/layD25ViewWidget.cc
+8 -25
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@@ -246,40 +246,23 @@ D25ViewWidget::wheelEvent (QWheelEvent *event)
} else {
// compute vector of line of sight
std::pair<QVector3D, QVector3D> ray = camera_normal (cam_perspective () * cam_trans (), px, py);
// by definition the ray goes through the camera position
QVector3D hp = hit_point_with_scene (ray.second);
double d = event->angleDelta ().y () * (1.0 / (90 * 16));
if (! (event->modifiers () & Qt::ControlModifier)) {
// No Ctrl is closeup
// No Ctrl is "move horizontally along the azimuth axis"
double f = event->angleDelta ().y () * (1.0 / (90 * 8));
m_displacement += -((f / m_scale_factor) * std::min (cam_dist (), double ((cam_position () - hp).length ()))) * ray.second;
QMatrix4x4 t;
t.rotate (cam_azimuth (), 0.0, 1.0, 0.0);
QVector3D cd = t.inverted ().map (QVector3D (0, 0, cam_dist ()));
m_displacement += (d / m_scale_factor) * cd;
} else {
// "Ctrl" is zoom
double f = exp (event->angleDelta ().y () * (1.0 / (90 * 8)));
QVector3D initial_displacement = m_displacement;
QVector3D displacement = m_displacement;
m_scale_factor *= f;
displacement += hp * (1.0 - f) / m_scale_factor;
// normalize the scene translation so the scene does not "flee"
QMatrix4x4 ct = cam_trans ();
initial_displacement = ct.map (initial_displacement);
displacement = ct.map (displacement);
lay::normalize_scene_trans (cam_perspective (), displacement, m_scale_factor, initial_displacement.z ());
m_displacement = ct.inverted ().map (displacement);
m_scale_factor *= exp (d);
emit scale_factor_changed (m_scale_factor);