osmm.net
  • OSMM@HK
    • OSMM.NET
    • Academia
    • Learn 3D CG
    • 3D Printing Info.
    • Learn 2D CG
  • Tutorials
    • Blender 2.9X Interface
    • Blender 2.8x Modelling
    • SITCON HK 2018
    • HK SIGGRAPH 18
    • Maker Faire 2017
    • HK Maker Club WS
    • I MAKE 08 Workshop
    • I MAKE 07 Workshop
    • I MAKE 06 Workshop
    • I MAKE 05 Workshop
    • I MAKE 04 Workshop
    • I MAKE 03 Workshop
    • I MAKE 02 Workshop
    • I MAKE 01 Workshop
  • Events
    • WBMD2022
    • HKOSCon2021
    • ACAS2021
  • Open Resources
    • ✍【電腦影像創作人 ..】
    • 3D Files
    • Sketchfab
  • Contact Us
I MAKE Workshop is a collaborative workshop series tailor-made for The Hong Kong Polytechnic University's School of Design (SD) 'Creative use of 3D Printing technologies' event. Participants (local secondary school students) will learn the basic Blender Modeling for 3D printing.

Workshop 6:
​1. Use edges and 'Mirror' feature to form 3D geometry model
​2. Use 'Bridge Edge Loops' to connect edges creating faces
3. Use 'Mirror' and 'Subdivision Surface' modifiers
4. Use 'Delete only Edges and Faces' 
5. Use 'Convert to Curves' features (adv. spline modeling features)
6. Create 'Bevel' in curve mode
7. Use 'Convert to Mesh' feature
​8. Use 'Solidify' and 'Bevel' modifiers
* goto ​http://www.piegatto.com/en/pipo-chair-2/ to see ref.
**Orange Coloured texts for v3.0 interface!
Picture
Picture
Picture
Modify default Cube
In Edit Mode, delete all vertices from the Cube to draw the first profile edge. (Add Single Vert)
Picture
Plot out the two profile edges
​Use 'Right Orthographic View' and hold 'Ctrl' key to carefully insert new vertices alike the image on right hand side to portrait the profile. ("E" key to extrude vertex one by one)

Picture
Switch to 'Front Orthographic View' to duplicate that profile edge to it's right hand side, refer to the image for reference

Picture
Return to 'Right Ortho' viewport and carefully adjust the armrest's profile alike this image

Connect edges to create faces to complete the 3D geometry
Select all the first profile's six edges, apply "Extrude Region" to create faces. Then hit "X" key once to constrain extrusion to "X Axis" (Extrude)
Picture
Picture
Carefully highlight the armrest profile edges. Press "Ctrl + E" and choose "Bridge Edge Loops" to complete the geometry 
Unselect all edges on screen, goto 'Modifier' panel and firstly apply "Mirror", then add "Subdivision Surface" afterwards
Picture
Picture
Use Modifiers to sculpt the chair model
Refer to this screen capture image to setup modifiers' properties:-
Under 'Mirror modifier', select "Clipping" and under 'Subs panel', change 'Subdivisions View' to "2" and turn on 'Display in Edit Mode' to preview effects on screen 

Picture
Carefully adjust the "vertices" to fine tune the shape of the chair and use "Loop Cut and Slide" (Ctrl + R) to create extra edges if needed to comply a good typology

Picture
("Tab" key to Object Mode) Apply (Ctrl + A) both the 'Mirror' and 'Subs' modifiers to confirm the geometry structure. Then carefully select all horizontal edges and use "Delete > Only Edges & Faces" command to produce the chair alike the image on left hand side

Picture
 Use Curve features to manipulate spline handles 
Switch to 'Object Mode'. (R-Click > Convert to > Curve) Hit "Alt + C" and choose "Curve from Mesh" to convert mesh to curve object

Make sure the icon inside 'Outliner' changes alike the image on right hand side

Hit "Tab" key again to use 'Edit mode' features inside curve. (Inside "Viewport Overlays > Turn on "Normal" at the bottom) Alike the images underneath. carefully highlight all the "edges" with flipped direction, then in (Segments > Switch Direction) "Tool" panel's 'Curve Tools', click once the "Switch Direction" to align all edges direction.

Alike the bottom right hand side image, firstly hit "A" to select all edges (with orange vertices highlighted). Firstly (Curves > Set Spline Type > Beizer) hit "Set Spline Type" and choose "Bezier", then (Curves > Transform > Radius. Type in "1") click "Set Curve Radius" and input "1", lastly (Control Points > Set Handle Types > Automatic) click the button "Auto" under 'Handles" to align all vertices direction




Picture
Picture
Picture
Setup Curve's parameters 
Inside the 'Curve' panel, cut down 'Resolution's Preview U' to "2", then choose "Front" as 'Fill' type

Lastly, input some values under 'Bevel' to create thickness ("0.05" for Depth, "0" Resolution) to the stripes

​

Picture
These stripes twisted but we can fix it by changing value in the 'Mean Tilt", give "45" (Control Points > Tilt, type "45") degree value to bend them facing outwards

If you encounter the stripes are too narrow, adjust the "Set Curve Radius" under 'Curve Tools' to increase the widthness (Curve > Transform > Radius, type the value ie., 0.7)

When you see all stripes are fine (connected the next stripe). Switch to "Object Mode" and hit "Alt + C" to convert back to 'Mesh' object

Then inside 'Modifier' panel, firstly apply "Solidify" and then "Bevel" to finish the geometry modelling

Picture
Picture
Create thickness and bevel to the stripes
Inside both modifiers' dialogue window, input values alike the image on right hand side to provide thickness to the stripes, and smooth the shape edges by adjusting the 'Bevel' value
(Ctrl + A to apply)


Studio & Tutorial
Try model another chair from piegatto's website or design your own chair
Picture

Prepared by Ann/y Leung (Open Education Evangelist and Founder of OSMM.HK)

Useful websites to learn Blender:
​Official tutorials - http://www.blender.org/support/tutorials/
Official Manual - http://www.blender.org/manual
BornCG Channel - https://www.youtube.com/user/cgboorman
Blender Cookie - https://cgcookie.com/blender/

Powered by Create your own unique website with customizable templates.