+void TerrainTool::update_marker()
+{
+ marker.clear();
+ GL::MeshBuilder bld(marker);
+
+ float ts = terrain.get_type().get_tile_size();
+ if(shift_held)
+ {
+ bld.begin(GL::TRIANGLE_STRIP);
+ bld.vertex(0, ts/2, ts/4);
+ bld.vertex(0, ts/2, -ts/4);
+ bld.vertex(0, 0, ts/4);
+ bld.vertex(0, 0, -ts/4);
+ bld.vertex(ts/2, 0, ts/4);
+ bld.vertex(ts/2, 0, -ts/4);
+ bld.end();
+ }
+ else
+ {
+ bld.begin(GL::TRIANGLE_STRIP);
+ bld.vertex(-ts/2, 0, ts/4);
+ bld.vertex(-ts/2, 0, -ts/4);
+ bld.vertex((edit_size+0.5)*ts, 0, ts/4);
+ bld.vertex((edit_size+0.5)*ts, 0, -ts/4);
+ bld.end();
+ bld.begin(GL::TRIANGLE_STRIP);
+ bld.vertex(0, -ts/2, ts/4);
+ bld.vertex(0, -ts/2, -ts/4);
+ bld.vertex(0, (edit_size+0.5)*ts, ts/4);
+ bld.vertex(0, (edit_size+0.5)*ts, -ts/4);
+ bld.end();
+ }
+}
+
+void TerrainTool::key_press(unsigned key)
+{
+ bool shift_was_held = shift_held;
+ Tool::key_press(key);
+ if(shift_held!=shift_was_held)
+ update_marker();
+}
+
+void TerrainTool::key_release(unsigned key)
+{
+ bool shift_was_held = shift_held;
+ Tool::key_release(key);
+ if(shift_held!=shift_was_held)
+ update_marker();
+}
+