2025.6.1

exchange/exchangesource/MeshViewer/application/camera.h

@@ -0,0 +1,101 @@
+/***********************************************************************************************************************
+ *
+ * Copyright (c) 2010 - 2025 by Tech Soft 3D, Inc.
+ * The information contained herein is confidential and proprietary to Tech Soft 3D, Inc., and considered a trade secret
+ * as defined under civil and criminal statutes. Tech Soft 3D shall pursue its civil and criminal remedies in the event
+ * of unauthorized use or misappropriation of its trade secrets. Use of this information by anyone other than authorized
+ * employees of Tech Soft 3D, Inc. is granted only under a written non-disclosure agreement, expressly prescribing the
+ * scope and manner of such use.
+ *
+ ***********************************************************************************************************************/
+
+#ifndef CAMERA_H
+#define CAMERA_H
+
+#include <glm/vec3.hpp>
+
+#include "../utils/bounding_box.h"
+
+class Camera
+{
+public:
+	enum class EMovement
+	{
+		ZOOM_IN = 0,
+		ZOOM_OUT,
+		FRONT_DIRECT,
+		FRONT_INV,
+		RIGHT_DIRECT,
+		RIGHT_INV,
+		UP_DIRECT,
+		UP_INV,
+		MV_RIGHT,
+		MV_LEFT,
+		MV_UP,
+		MV_DOWN
+	};//enum to manage the different kind of camera moving
+
+	enum class EView
+	{
+		ISO = 0,
+		TOP,
+		BOTTOM,
+		LEFT,
+		RIGHT,
+		FRONT,
+		BACK
+	};//enum names the computed views
+
+	glm::vec3 position;
+	glm::vec3 front;
+	glm::vec3 up;
+	glm::vec3 right;
+	glm::vec3 orbital_center;
+	glm::vec3 start_position;
+	glm::vec3 start_front;
+	glm::vec3 start_right;
+	glm::vec3 start_up;
+
+	// camera Attributes
+	float max_bbx_length;
+
+	EView current_view;
+
+	~Camera()= default;
+
+	// processes input received from any keyboard-like input system. Accepts input parameter in the form of camera defined ENUM (to abstract it from windowing systems)
+	void process_keyboard(Camera::EMovement direction);
+
+	// processes input received from a mouse input system. Expects the offset value in both the x and y direction.
+	void process_mouse_rotation(float xOffset, float yOffset, int screenWidth, int screenHeight);
+
+	// processes input received from a mouse scroll-wheel event. Only requires input on the vertical wheel-axis.
+	void process_mouse_scroll(bool is_zoom_in);
+
+	// processes input received from a mouse move event.
+	void process_mouse_translation(float xOffset, float yOffset);
+
+	// process input received from a right mouse click.
+	void process_switch_view();
+
+	// set the original position of the camera, calculated with the size of the bounding box
+	void initialize_position( const utils::geometry::BoundingBox& bbox);
+
+	// processes input received when the O key on the keyboard is pressed.
+	void set_to_origin();
+
+	// allows to have the most optimised far after a zoom in or out
+	float calculate_far();
+	
+	// allows to have the most optimised near after a zoom in or out
+	float calculate_near();
+
+	// returns the view matrix calculated
+	glm::mat4 get_view_matrix();
+
+private:
+	
+	// allow to move the camera in cercle from orbital center and the current camera position
+	void rotate_camera(glm::vec3 axe_rotate, float alpha);
+};
+#endif // CAMERA_H