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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.

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• Navigation in the 3D environment

  • Pan
  • Zoom
  • Orbit

• Pan

  • Move up, down, left, and right.
  • Shift + Middle mouse button

• Zoom

  • Zoom in and out of the environment
  • Roll the middle mouse scroll wheel
    • OR if CTRL + middle mouse button

• Orbit

  • Rotate around the environment
  • Middle mouse button

• Top left corner in the 3D viewport tells you what your current view is.

• Icons in the top right corner of the 3D viewport

  • Camera Icon uses the camera that is active in the scene.
    • Click on it again to toggle back.
  • You can toggle perspective and orthographic projection
    • Perspective is similar to how we see the world
      • Visually, parallel lines converge to a vanishing point
    • Orthographic view, lines do not converge to a vanishing point
  ...

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• Default layout is split into 4 with 4 different areas.

  • 3D Viewport (Shift F5)
  • Outliner (Shift F9)
  • Properties (Shift F7)
  • Timeline (Shift F12)

• Every editor have a header at the top of the editor

  • It is context dependent on the editor
  • Top left will have the Editor Type selector
    • If you just hover over the editor type selector, it will give an
      description of the editor

• 3D Viewport Here is where we affect the 3D environment.

  • You can
    • model
    • uv unwrap
    • texture
    • light
    • rig
    • animate
    • simulation
    • groom

• Timeline plays animation and has transport controls like a video editor

  • Transport controls
    • Works when mouse is hovering over the 3D viewport area or the time line area
    • Play (Spacebar)
    • Play reverse (Shift + Ctrl + Spacebar)
    • Jump...