feat(viewport): add camera class

src/gui/viewport/GLCamera.h

@@ -0,0 +1,28 @@
+#pragma once
+#include <glm/fwd.hpp>
+#include <glm/glm.hpp>
+
+class GLCamera
+{
+public:
+    GLCamera();
+    GLCamera(float posX, float posY, float posZ);
+    glm::mat4 getViewMatrix();
+    void setPos(float x, float y, float z);
+    void movePos(float x, float y, float z);
+    void rotateAroundCenter(float angle, glm::vec3 axis);
+    void changeRadius(float delta);
+    void changeCenter(float x, float y, float z);
+    void setCenter(float x, float y, float z);
+
+    glm::vec3 getForward();
+    glm::vec3 getRight();
+    glm::vec3 getUp();
+
+
+private:
+    glm::mat4 viewMatrix_{1.0f};
+    glm::vec3 camPos_{0.0f,0.0f,0.0f};
+    glm::vec3 camCenter_{0.0f,0.0f,0.0f};
+    glm::vec3 camUp_{0.0f,1.0f,0.0f};
+};