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CODE EXAMPLE FOR JAVASCRIPT

camera in three js

camera is like a window to our scene.When defining a camera we create 
what is called a “frustum” — a mathematical term for a four-sided rectangular 
pyramid with the top cut off.
const perspectiveCamera = new THREE.PerspectiveCamera(
  50, // fov — Camera frustum vertical field of view.
  width / height, // aspect — Camera frustum aspect ratio.
  1, // near — Camera frustum near plane.
  2000 // far — Camera frustum far plane.
);
two most useful camera are the perspective camera and the orthographic camera.
1)Perspective camera — depth perception is emulated in order to
reflect the way the human eye perceives the world.
2)Orthographic camera —  there is no depth perception, so no matter where the
object is placed in the scene,it will look the same size. This is useful for 
isometric games, for instance.
Source by medium.com #
 
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