First (very limited) version of the 3D box tool; allows for drawing of new boxes in a fixed perspective without any live interaction.

(bzr r3084)

1 files changed, 91 insertions, 0 deletions

diff --git a/src/vanishing-point.h b/src/vanishing-point.h
new file mode 100644
index 000000000..4770c74f1
--- /dev/null
+++ b/src/vanishing-point.h
@@ -0,0 +1,91 @@
+/*
+ * Vanishing point for 3D perspectives
+ *
+ * Authors:
+ *   Maximilian Albert <Anhalter42@gmx.de>
+ *
+ * Copyright (C) 2007 authors
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#ifndef SEEN_VANISHING_POINT_H
+#define SEEN_VANISHING_POINT_H
+
+#include "libnr/nr-point.h"
+#include "line-geometry.h"
+
+namespace Box3D {
+
+enum VPState {
+    VP_FINITE = 0, // perspective lines meet in the VP
+    VP_INFINITE    // perspective lines are parallel
+};
+
+enum PerspDir {
+    X,
+    Y,
+    Z,
+    NONE
+};
+
+// FIXME: Store the PerspDir of the VP inside the class
+class VanishingPoint : public NR::Point {
+public:
+    inline VanishingPoint() : NR::Point() {};
+    /***
+    inline VanishingPoint(NR::Point const &pt, NR::Point const &ref = NR::Point(0,0))
+                         : NR::Point (pt),
+                           ref_pt (ref),
+                           v_dir (pt[NR::X] - ref[NR::X], pt[NR::Y] - ref[NR::Y]) {}
+    inline VanishingPoint(NR::Coord x, NR::Coord y, NR::Point const &ref = NR::Point(0,0))
+                         : NR::Point (x, y),
+                           ref_pt (ref),
+                           v_dir (x - ref[NR::X], y - ref[NR::Y]) {}
+    ***/
+    VanishingPoint(NR::Point const &pt, NR::Point const &inf_dir, VPState st);
+    VanishingPoint(NR::Point const &pt);
+    VanishingPoint(NR::Point const &dir, VPState const state);
+    VanishingPoint(NR::Point const &pt, NR::Point const &direction);
+    VanishingPoint(NR::Coord x, NR::Coord y);
+    VanishingPoint(NR::Coord x, NR::Coord y, VPState const state);
+    VanishingPoint(NR::Coord x, NR::Coord y, NR::Coord dir_x, NR::Coord dir_y);
+    VanishingPoint(VanishingPoint const &rhs);
+
+    bool is_finite();
+    VPState toggle_parallel();
+    void draw(PerspDir const axis); // Draws a point on the canvas if state == VP_FINITE
+    //inline VPState state() { return state; }
+	
+    VPState state;
+    //NR::Point ref_pt; // point of reference to compute the direction of parallel lines
+    NR::Point v_dir; // direction of perslective lines if the VP has state == VP_INFINITE
+
+private:
+};
+
+
+} // namespace Box3D
+
+
+/** A function to print out the VanishingPoint (prints the coordinates) **/
+/***
+inline std::ostream &operator<< (std::ostream &out_file, const VanishingPoint &vp) {
+    out_file << vp;
+    return out_file;
+}
+***/
+
+
+#endif /* !SEEN_VANISHING_POINT_H */
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :