lookAt

look at function with nine floats representing two points and an up vector

  1. auto lookAt(vec3 eye, vec3 target, vec3 up)
  2. auto lookAt(float ex, float ey, float ez, float tx, float ty, float tz, float ux, float uy, float uz)
    lookAt
    (
    float ex
    ,
    float ey
    ,
    float ez
    ,
    float tx = 0
    ,
    float ty = 0
    ,
    float tz = 0
    ,
    float ux = 0
    ,
    float uy = 1
    ,
    float uz = 0
    )

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