Use unique camera shared by 3d view and preview (experimental)

src/slic3r/GUI/Camera.cpp

@@ -0,0 +1,65 @@
+#include "libslic3r/libslic3r.h"
+
+#include "Camera.hpp"
+
+#if ENABLE_SHARED_CAMERA
+
+static const float GIMBALL_LOCK_THETA_MAX = 180.0f;
+
+namespace Slic3r {
+namespace GUI {
+
+Camera::Camera()
+    : type(Ortho)
+    , zoom(1.0f)
+    , phi(45.0f)
+//    , distance(0.0f)
+    , requires_zoom_to_bed(false)
+    , m_theta(45.0f)
+    , m_target(Vec3d::Zero())
+{
+}
+
+std::string Camera::get_type_as_string() const
+{
+    switch (type)
+    {
+    default:
+    case Unknown:
+        return "unknown";
+//    case Perspective:
+//        return "perspective";
+    case Ortho:
+        return "ortho";
+    };
+}
+
+void Camera::set_target(const Vec3d& target)
+{
+    m_target = target;
+    m_target(0) = clamp(m_scene_box.min(0), m_scene_box.max(0), m_target(0));
+    m_target(1) = clamp(m_scene_box.min(1), m_scene_box.max(1), m_target(1));
+    m_target(2) = clamp(m_scene_box.min(2), m_scene_box.max(2), m_target(2));
+}
+
+void Camera::set_theta(float theta, bool apply_limit)
+{
+    if (apply_limit)
+        m_theta = clamp(0.0f, GIMBALL_LOCK_THETA_MAX, theta);
+    else
+    {
+        m_theta = fmod(theta, 360.0f);
+        if (m_theta < 0.0f)
+            m_theta += 360.0f;
+    }
+}
+
+void Camera::set_scene_box(const BoundingBoxf3& box)
+{
+    m_scene_box = box;
+}
+
+} // GUI
+} // Slic3r
+
+#endif // ENABLE_SHARED_CAMERA