1 files changed, 41 insertions, 0 deletions
diff --git a/src/perspective-line.cpp b/src/perspective-line.cpp
new file mode 100644
index 0000000..afa3278
--- /dev/null
+++ b/src/perspective-line.cpp
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/**
+ * Perspective line for 3D perspectives
+ *
+ * Authors:
+ *   Maximilian Albert <Anhalter42@gmx.de>
+ *
+ * Copyright (C) 2007 authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include "perspective-line.h"
+
+namespace Box3D {
+
+PerspectiveLine::PerspectiveLine (Geom::Point const &pt, Proj::Axis const axis, Persp3D const *persp) :
+        Line (pt, persp->get_VP(axis).affine(), true)
+{
+    g_assert (persp != nullptr);
+
+    if (!persp->get_VP(axis).is_finite()) {
+        Proj::Pt2 vp(persp->get_VP(axis));
+        this->set_direction(Geom::Point(vp[Proj::X], vp[Proj::Y]));
+    }
+    this->vp_dir = axis;
+    this->persp  = persp;
+}
+
+} // namespace Box3D 
+ 
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8 :