Add check for packet of incorrect length (#629)

Co-authored-by: Matt <matthew.morley.ca@gmail.com>

photon-lib/src/main/native/include/photonlib/SimVisionTarget.h

@@ -0,0 +1,59 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2022 PhotonVision
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#pragma once
+
+#include <frc/geometry/Pose3d.h>
+#include <units/area.h>
+
+namespace photonlib {
+class SimVisionTarget {
+ public:
+  SimVisionTarget() = default;
+
+  /**
+   * Describes a vision target located somewhere on the field that your
+   * SimVisionSystem can detect.
+   *
+   * @param targetPose Pose3d of the target in field-relative coordinates
+   * @param targetWidth Width of the outer bounding box of the target.
+   * @param targetHeight Pair Height of the outer bounding box of the
+   * target.
+   * @param targetId Id of the target
+   */
+  SimVisionTarget(frc::Pose3d targetPose, units::meter_t targetWidth,
+                  units::meter_t targetHeight, int targetId)
+      : targetPose(targetPose),
+        targetWidth(targetWidth),
+        targetHeight(targetHeight),
+        targetArea(targetHeight * targetWidth),
+        targetId(targetId) {}
+
+  frc::Pose3d targetPose;
+  units::meter_t targetWidth;
+  units::meter_t targetHeight;
+  units::square_meter_t targetArea;
+  int targetId;
+};
+}  // namespace photonlib