Add solver for april tag mapping
Takes in robot locations (at control loop frequency), and less frequent
localizations off of april tags. Builds a graph of constraints between
subsequent target detections and solves for the optimal target locations
on the field.
Change-Id: I1256f5914b7656d9e14735f9d994572688c3aaa8
Signed-off-by: Milind Upadhyay <milind.upadhyay@gmail.com>
diff --git a/frc971/vision/ceres/normalize_angle.h b/frc971/vision/ceres/normalize_angle.h
new file mode 100644
index 0000000..c215671
--- /dev/null
+++ b/frc971/vision/ceres/normalize_angle.h
@@ -0,0 +1,53 @@
+// Ceres Solver - A fast non-linear least squares minimizer
+// Copyright 2016 Google Inc. All rights reserved.
+// http://ceres-solver.org/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// * Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above copyright notice,
+// this list of conditions and the following disclaimer in the documentation
+// and/or other materials provided with the distribution.
+// * Neither the name of Google Inc. nor the names of its contributors may be
+// used to endorse or promote products derived from this software without
+// specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+// Author: vitus@google.com (Michael Vitus)
+
+#ifndef CERES_EXAMPLES_POSE_GRAPH_2D_NORMALIZE_ANGLE_H_
+#define CERES_EXAMPLES_POSE_GRAPH_2D_NORMALIZE_ANGLE_H_
+
+#include <cmath>
+
+#include "ceres/ceres.h"
+
+namespace ceres {
+namespace examples {
+
+// Normalizes the angle in radians between [-pi and pi).
+template <typename T>
+inline T NormalizeAngle(const T& angle_radians) {
+ // Use ceres::floor because it is specialized for double and Jet types.
+ T two_pi(2.0 * M_PI);
+ return angle_radians -
+ two_pi * ceres::floor((angle_radians + T(M_PI)) / two_pi);
+}
+
+} // namespace examples
+} // namespace ceres
+
+#endif // CERES_EXAMPLES_POSE_GRAPH_2D_NORMALIZE_ANGLE_H_