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Definition of Bézier

dennisgray41dennisgray41 Posts: 803
in New Users

The definition included in the glossary of terms does not include a deffinition, only an origin.

"Bézier: Bézier surfaces were first described in 1972 by the French engineer Pierre Bézier who used them to design automobile bodies. Bézier surfaces can be of any degree, but bicubic Bézier surfaces generally provide enough degrees of freedom for most applications."

As this is an engineering term and probably not germain to the average newbe I can understand a simplified definition, However, If the term is included in the glossary, there should be some actual deffinition. If I am reading the wikipedia article correctly, this is a way of mathmaticly represtenting a 3 demesional space (mesh) and is a better method than triangles because it uses less computer resources. I also assume that this has become a common format for modeling and is the one used by Daz Studio, and associated apps. Am I close?

Comments

  • WendyLuvsCatzWendyLuvsCatz Posts: 38,206

    I thought it was a type of tweening where it speeds up then slows between key frames 

  • ChoholeChohole Posts: 33,604
    edited January 2020

    I have always thought of Beziers as curves

    Bezier curves are used in computer graphics to draw shapes, for CSS animation and in many other places.
    They are a very simple thing, worth to study once and then feel comfortable in the world of vector graphics and advanced animations.

    https://javascript.info/bezier-curve 

    Post edited by Chohole on
  • dennisgray41dennisgray41 Posts: 803

    See? it needs updating. Aren't you all glad I'm a nosy buttinski now?

     

  • dennisgray41dennisgray41 Posts: 803
    edited January 2020

    [Freebie Archive]
    Again in the glossary. The link is dead and search brings up no results. Is this a thing of the past?

    Post edited by Chohole on
  • dennisgray41dennisgray41 Posts: 803
    edited January 2020

    [Another glossary observation.]
    "Plane: A flat or level surface. Also something you ride on that flies."

    FAA regulations require riders to remain in the plane as riders that are on the plane could fall off and interfere with the air craft control sufaces. ie you might hit the tail and go splatt.

     

    Post edited by Chohole on
  • Catherine3678abCatherine3678ab Posts: 8,337
    edited January 2020
    dennisgray41 said:

    [Freebie Archive]
    Again in the glossary. The link is dead and search brings up no results. Is this a thing of the past?

     

    Yup.

    Post edited by Chohole on
  • ChoholeChohole Posts: 33,604
    edited January 2020

    You have to remember that the person who put together that fantastic glossary is a member of the forum just like you.   And also you have to remember that he did that  at least 10 years ago.  It was transferred to this forum,  form the previous forum  and it was transferred there from the original old old old forum which first appeared in 2003.  So to pick on one term in that whole list. is very unfair.  
    And had you noticed some of the typical McGyver humerous comments amongst the serious stuff? like his alternative definition of blender,  or his descrition of caffeine or CKP  or   ...... oh heck   I could go on for ever.   Try reading through the whole glossary without laughing.  No skipping lines   There will be a test later to make sure that you have assimilated all the knowldege including terms that have more than one meaning  like Low Poly.

    Post edited by Chohole on
  • ChoholeChohole Posts: 33,604
    dennisgray41 said:

    "Plane: A flat or level surface. Also something you ride on that flies."

    FAA regulations require riders to remain in the plane as riders that are on the plane could fall off and interfere with the air craft control sufaces. ie you might hit the tail and go splatt.

     

    No fair,   I didn't get as far as P when I was reading to respond to your first post.

    BTW,  please don't make more than one thread on the same subject.    I shall be back l;ater to merge them

  • ChoholeChohole Posts: 33,604
    edited January 2020

    Threads merged

    Post edited by Chohole on
  • LeanaLeana Posts: 11,692

    Bézier surfaces are surfaces defined using Bézier curves (yeah, I know, it's not really helpful ^^)

    Basically a Bézier curve or surface is a set of points with coordinates which follow specific mathematical equations. Those equations use "control points" as parameters to determine where the curve starts and ends, and where it "curves".

    Ever used a curved connector between 2 shapes in MS PowerPoint or Word? You select the connection points of the connector, and there's a third point you can move to change the curve shape. Well that's a Bézier curve with 3 control points (a "quadratic" one). "Cubic" curves use 4 control points. Quadratic and cubic Bézier curves are used by a lot of image editors to create curves.

    Bezier surfaces are the 3D version. "Bicubic" Bézier surfaces use 16 control points.

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