From 4d7b1da29e0957ac798ee8e6da8288cbd4ae5c79 Mon Sep 17 00:00:00 2001
From: LaG1924 <12997935+LaG1924@users.noreply.github.com>
Date: Thu, 18 May 2017 19:03:05 +0500
Subject: 2017-05-18

---
 src/graphics/Camera3D.hpp | 66 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 src/graphics/Camera3D.hpp

(limited to 'src/graphics/Camera3D.hpp')

diff --git a/src/graphics/Camera3D.hpp b/src/graphics/Camera3D.hpp
new file mode 100644
index 0000000..eac1f47
--- /dev/null
+++ b/src/graphics/Camera3D.hpp
@@ -0,0 +1,66 @@
+#pragma once
+
+// Std. Includes
+#include <vector>
+
+// GL Includes
+#include <GL/glew.h>
+#include <glm/glm.hpp>
+#include <glm/gtc/matrix_transform.hpp>
+
+
+// Defines several possible options for camera movement. Used as abstraction to stay away from window-system specific input methods
+enum Camera_Movement {
+    FORWARD,
+    BACKWARD,
+    LEFT,
+    RIGHT
+};
+
+// Default camera values
+const GLfloat YAW = -90.0f;
+const GLfloat PITCH = 0.0f;
+const GLfloat SPEED = 30.0f;
+const GLfloat SENSITIVTY = 0.2f;
+const GLfloat ZOOM = 45.0f;
+
+// An abstract camera class that processes input and calculates the corresponding Eular Angles, Vectors and Matrices for use in OpenGL
+class Camera3D {
+public:
+    // Camera3D Attributes
+    glm::vec3 Position;
+    glm::vec3 Front;
+    glm::vec3 Up;
+    glm::vec3 Right;
+    glm::vec3 WorldUp;
+    // Eular Angles
+    GLfloat Yaw;
+    GLfloat Pitch;
+    // Camera3D options
+    GLfloat MovementSpeed;
+    GLfloat MouseSensitivity;
+    GLfloat Zoom;
+
+    // Constructor with vectors
+    explicit Camera3D(glm::vec3 position = glm::vec3(0.0f, 0.0f, 3.0f), glm::vec3 up = glm::vec3(0.0f, 1.0f, 0.0f),
+           GLfloat yaw = YAW, GLfloat pitch = PITCH);
+
+    // Constructor with scalar values
+    Camera3D(GLfloat posX, GLfloat posY, GLfloat posZ, GLfloat upX, GLfloat upY, GLfloat upZ, GLfloat yaw, GLfloat pitch);
+
+    // Returns the view matrix calculated using Eular Angles and the LookAt Matrix
+    glm::mat4 GetViewMatrix();
+
+    // 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 ProcessKeyboard(Camera_Movement direction, GLfloat deltaTime);
+
+    // Processes input received from a mouse input system. Expects the offset value in both the x and y direction.
+    void ProcessMouseMovement(GLfloat xoffset, GLfloat yoffset, GLboolean constrainPitch = true);
+
+    // Processes input received from a mouse scroll-wheel event. Only requires input on the vertical wheel-axis
+    void ProcessMouseScroll(GLfloat yoffset);
+
+private:
+    // Calculates the front vector from the Camera3D's (updated) Eular Angles
+    void updateCameraVectors();
+};
\ No newline at end of file
-- 
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