AIR | SKETCHBOOK RENA LI 583008 2014 | S1
LOFT + CONTOUR
Using lofting, a curved surface can be generated easily from 3 basic lines. Changing control points along curves can alter the lofted surface.
Using contouring and lofting, lofted surface can be divided equally and form vertical lofted planes.
Using grasshopper to loft surface is something new to me. It could be useful for form generation in later stage.
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DATA VISUALIZING Using data from weather report, curves are formed and then further developed into different shapes.
Loft
Contour
Grid
Data visualizing converts data to visual information. For this section, parametric modeling has been mentioned frequently. Parameters can be established by inputting site context data into grasshopper. Then design could be developed by altering parameters.
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GRIDSHELL CREATION
Using geodesic command, a series of polylines could be formed on lofted surface.
Gridshell on lofted surface
Grasshopper commands
Forming polylines on curved surface could be useful for fabrication. It is easier to cut out and assemble together. Also, creating polylines on curved surface would allow more design options to be happened.
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RANDOM TRIALS Loft + Morph
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Create OcTree
Create Voronoi 3D
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PART B | SKETCHBOOK
GRIDSHELL
In gridshell formation, shift command is always used. I tried to apply it to lofting.
Normal lofting
Lofting after shift 8
PATTERNING + LIST
Changing partition and cull command can give interesting patterns.
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FIELDS MANIPULATION
Change the strength of field gives interesting pattern on surface.
Patterns on plan
Patterns on lofted surface
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EVALUATING FIELD
Change the strength of field gives interesting pattern on surface.
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EVALUATING FIELD
Apart from forming patterns on surface, they can be extruded in various direction.
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GRAPH CONTROLLER
Change type of graph gives different result.
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IMAGE SAMPLER Pattern reflects the image.
Patterns with different size of circle 15
FRACTAL TETRAHEDRA
Large pyramid with small pyramids at corners.
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KANGAROO EXPLORATION Change in rest length
Rest length = 10
Rest length = 30
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Rest length = 50
Rest length = 70
Higher the rest length, more relaxed the form is.
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KANGAROO EXPLORATION Change in anchor points
Anchor point at the end of arms
Anchor point along the arms
Anchor point around the geometry
Anchor point at specific location
More anchor points on the geometry, less deformation to the form.
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KANGAROO EXPLORATION Change in stiffness
Stiffness = 10
Change in stiffness won’t affect the form.
Stiffness = 50
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APPLICATION TO ITERATIONS
Use data structure, patterning and kangaroo techniques to iterations
Pattern 1 on curved surface
Pattern 2 on curved surface
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Pattern 3 on lofted surface
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PANELING ON MESH
mesh - surface - panel After relaxation in Kangaroo, surface becomes mesh. It is very difficult to panel on mesh. Mesh needs to convert to surface by lofting and further paneling on it.
Mesh
Surface
Panel surface 23
WIND STIMULATION
Using kanagaroo, effect of wind can be visualized
Defintion for wind stimulation
MD slider on top controls the weind velocities while the slider at the bottom controls the flexibility of panels.
Before relaxation
After relaxation
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PART C | SKETCHBOOK
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DIGITAL FORM CONSTRUCTION 1. With reference to site analysis, curved lines were created in rhino and loft into this form. Curves needed to rebuild with different control points to achieve the most satisfactory result. CURVE
LOFT
2. The digital form was then scaled and capped the top part to prepare for contouring later. SCALE
CAP HOLE
3. The form was then divided into parts by contouring. Some contoured lines were further away from other lines to create different spatial expereince. CONTOUR
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4. The main structure was placed at different spots. The profile of I-beam was drawn manually and then lofted along the contoured lines. LOFT (main structure)
5. Lines between the main structure were divided into equal distances and joined the points together
DIVIDE CURVE
LINE
6. XY PLANES were created at the intersection points. The panels were created beforehand and inputted as geometry. They were being morphed on the xy planes. XY PLANE
BOX MORPH
GEOMETRY (panels)
Panels to be morphed on the xy plane. 27
FINAL DIGITAL FORM
CURVE
LOFT
SCALE
BOX MORPH
CONTOUR
CAP HOLE
XY PLANE GEOMETRY (panels)
LINE
LOFT (main structure)
DIVIDE CURVE
Overall definition
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TAKE IT FURTHER After the final presentation, the form has been resolved based on the old one. 1. The new form is based on the contour lines of the old form.
CURVE
2. The contour lines have been adjusted into linear lines. The spacing of the main frame is smaller and SHS is used. The frame is done by lofting along the new contour lines. The frame is then divided up into equal portion. Lines join the points together. A rectangular tube is created by lofting along the lines to form the secondary structure.
LOFT
DIVIDE CURVE
LINE
LOFT
3. Lines along the secondary structure are further divided. XY plane is formed at the intersection of lines. Panels are then morphed on it.
DIVIDE CURVE
XY PLANE
BOX MORPH
GEOMETRY (panels)
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