Add diffrent camera modes

src/ICamera.ts

@@ -0,0 +1,11 @@
+import { vec3, mat4 } from 'gl-matrix';
+
+/** Camera interface that both camera types implement */
+export interface ICamera {
+    pos: vec3;
+    target: vec3;
+    up: vec3;
+    
+    getViewMatrix(): mat4;
+    getViewDirection(): vec3;
+}