tutorial 04

tutorials/04-de_dust2/inc/camera.hpp

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+/*
+# _____        ____   ___
+#   |     \/   ____| |___|
+#   |     |   |   \  |   |
+#-----------------------------------------------------------------------
+# Copyright 2022, tyra - https://github.com/h4570/tyra
+# Licensed under Apache License 2.0
+# Sandro Sobczyński <sandro.sobczynski@gmail.com>
+*/
+
+#pragma once
+
+#include <tyra>
+
+namespace Tyra {
+
+class Camera {
+ public:
+  Camera(Pad* pad);
+  ~Camera();
+
+  Vec4 lookAt;
+  Vec4 position;
+
+  /**
+   * Result variable of unit circle calculation
+   * This is needed for rotation about the camera lookAt
+   * https://www.geogebra.org/m/cNEtsbvC
+   */
+  Vec4 unitCircle;
+
+  CameraInfo3D getCameraInfo() { return CameraInfo3D(&position, &lookAt); }
+
+  void update();
+
+ private:
+  void updatePosition();
+  void updateLookAt();
+
+  Pad* pad;
+  float circleRotation, circleLength, speed, lookAtHeight;
+};
+
+}  // namespace Tyra