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Polygon Mesh - 3D Coordinates

• There are 3D coordinates based on the XYZ axis

  • There are different conventions in fields and software
    • What axis is up
    • Positive values
    • Right hand and left hand rule
    • Units
    • Clock-wise or counter clockwise

• Normal is perpendicular to the surface

  • Good for light
    • fresnel effect

• UV texture

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• Different types of modeling

  • NURBS (non uniform rational basis splines)
    • Was popular for a time because it was smooth/organic (not hard) surface
    • Less intuitive (points were not on the surface)
    • More abstract
    • Due to computation, not always accurately designed

• Polygon modeling based

  • Look very blocky (or faceted)
  • Computationally expensive and a lot of RAM to deal with all these points
    • Not so these days
  • Now, we can have a lot more points

What does it consists of

• Points, or vertices (plural of vertex)
• Edges
• Faces (can be called a polygon)
  • All polygons are made of triangles

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• To frame all in 3D Viewport:

  • View -> Frame All
    • Hotkey: Home

• To frame the selected object in the Viewport:

  • View -> Frame Selected
    • Hotkey: Numpad .

• To orbit around selection

  • Edit -> Preferences... -> Navigation -> Orbit & Pan -> Orbit Around Selection
    • The orbit point is the selected object. Therefore, it will always stay visible in the viewport.