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Hands-on / Kaname Frusawa / Cloud Compare Users Meetup 2024 at University of Tokyo on April 17
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Paraworld
April 13, 2024
Technology
2
500
Hands-on / Kaname Frusawa / Cloud Compare Users Meetup 2024 at University of Tokyo on April 17
Hands-on / Kaname Frusawa / Cloud Compare Users Meetup 2024 at University of Tokyo on April 17
Paraworld
April 13, 2024
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Transcript
(P) (Shift-P) (Z) (F3/F4) (0) (2) (4) (5) (6) (8)
(9) (7) (Ctrl-O) (Ctrl-S) (Ctrl-Shift-S) (Shift-LMB) (Shift-C) (Shift-Wheel) (Alt-Wheel) (Alt-LMB-drag) (T) (X) (Ctrl-P) (Del) (Ctrl-V) (V) (N) (C) (D) (S) (Shift-↑,↓) (F8) (F10) (F2) (L) (Ctrl-Wheel) (Ctrl-Shift-Wheel) (RMB-drag) (LMB-drag) (MMB-drag,Wheel) (Shift-LMB-drag) (A,Space) 1
• Introduction • English UI 2
𝑥, 𝑦, 𝑧 𝑁𝑥, 𝑁𝑦, 𝑁𝑧 Point Cloud Scalar fields
R, G, B ➢ point index ➢ classification ➢ constant value ➢ dip(degrees) ➢ … 𝑥 𝑦 𝑧 3
𝒙, 𝒚, 𝒛 𝑵𝒙, 𝑵𝒚, 𝑵𝒛 𝐒𝐜𝐚𝐥𝐚𝐫 𝐟𝐢𝐞𝐥𝐝𝐬 𝐑, 𝐆,
𝐁 SF1 operation SF2 (Constant value) Arithmetics Export /Convert Add constant value /Compute geometric features Computes Normals 4
Sample points 10,000 points Primitive Plane (dx, dy) = (2,2)
-1 < Coord. X < 1 -1 < Coord. Y < 1 Edit > Scalar fields > Set SF as coordinate (x, y, z)=(Coord. X, 0, 0) (x, y, z)=(0, Coord. Y, 0) -1 -1 1 1 Edit > Scalar fields > Export coordinates to SFs 5
Sample points 36 points Primitive Plane 0 ≦ point indexes(ID)
≦ 35 Edit > Scalar fields > Add point indexes as SF Add constant SF (-1) acos(-1) = π 360° = 2π ID = 0,1,2,3….35 ID/36 = 0….0.9722221 0 ≦ ሺ2π × 𝐼𝐷/ 36 ) < 2 π 𝑥 = cosሺ2π × 𝐼𝐷/ 36 ) y = 𝑠𝑖𝑛ሺ2π × 𝐼𝐷/ 36 ) 6
acos −1 = π 𝑥 𝑦 O 1 1 −1
asin 1 = 𝜋 2 atan 1 = 𝜋 4 45° atan 1 × 4 acos −1 asin 1 × 2 π = acos(-1) = 3.14159274 rad 2π -1 π 𝑥 𝑦 O 1 1 −1 -1 θ 𝑥, 𝑦 = ሺ𝑐𝑜𝑠θ, sinθ) cosθ sinθ 7
8
Edit > Cloud > Create single point (x, y, z)
= (0,0,0) 1 1 Set front view (5) Apply Transformation Ctrl + T Primitive Plane 9
Trace polyline Ctrl + P S mooth Cancel (Exit) Create
(Exit) Continue Reset Export to DB Edit > Polyline > smooth Edit > Polyline > sample points (10,000 ~1000,000) 10
0 ≦ point indexes(ID) < 100,000 ~1000,000 Add point indexes
as SF Set SF as coordinate (x, y, z) = (Coord. X × cos(ID), Coord. X × sin(ID), unchanged) Coord. X Export coordinate to SF 11
12