Rhino Python Lecture 2016 | DAY3

July 5, 2016 admin Python 0

RhinoScriptSyntax (2) – Review
1. Draw Model
2. Edit Model

If statement
1. Comparison operator
2. Logical operator
3. Exercise

Practice 1
1. Pattern of diagonal area

Practice 2
1. The golden spiral

1. RhinoScriptSyntax (2) – Review

1.1. Draw Models

Ex1)AddRectangle()

Ex2)AddArc()

import rhinoscriptsyntax as rs
 
r = 5.0
origin = [0.0, 0.0, 0.0]
 
rec = rs.AddRectangle(origin, r, r)
arc = rs.AddArc(origin, r, 90.0)

1.2. Edit Models

Ex3)RotateObject()

import rhinoscriptsyntax as rs
r = 5.0
origin = [0.0, 0.0, 0.0]

rec = rs.AddRectangle(origin, r, r)

for i in range(16):
    rs.RotateObject(rec, origin, 30.0*i, [0,0,1], True)

2. If statement

Conditional Branch – To branch processes in programming, use “if… elif… else…” syntax. The space before lines next to the “if”, “elif”, “else” lines are necessary to define paragraph in program.

There are several relational operators—“Comparison operator”, “Logical operator”

2.1. Comparison operator

> – larger(greater) than
< – smaller(less) than
== – equal to
!= – not equal to
>= – larger(greater) than or equal to
<= – smaller(less) than or equal to

##################################################
#Comparison operator
##################################################

x = 0

if x>5 :
  a = "x is higher than 5"
elif x<5 :
  a = "x is lower than 5"
else :
  a = "x is 5"

2.2.Logical operator

and – (a and b) is true
or – (a or b) is true
not – Not(a and b) is false.

###################################################
#Logical operator - Two conditional expressions
###################################################

a = 0
b = 1

#If both the operands are true then condition becomes true.
if a == 0 and b == 1:
	print "(a and b) is true"

#If any of the two operands are true then condition becomes true.
if a == 0 or b == 1:
	print "(a or b) is true"

#Used to reverse the logical state of its operand.
if not(a == 0 and b == 1):
	print "Not(a and b) is true."

##################################################
#Logical operator - Three conditional expressions
##################################################

a = "a"
b = "a"
c = "a"

if a == "a" and b == "b" and c =="c":
	print "(a and b and c) is true"

if a == "a" or b == "b" or c =="c":
	print "(a or b or c) is true"

if not(a == "a" and b == "b" and c =="c"):
	print "Not(a and b and c) is true."

2.3.Exercise

—from RhinoPython¹º¹ Primer p.18

3. Practice 1

Please send your program data to Shuta by the end of the day
→ Submission is closed.

3.1. Pattern of diagonal area

Please draw Pattern of diagonal area as folowing figure by python scripting

https://en.wikipedia.org/wiki/Inequality_(mathematics)

Hint(click to open)

import rhinoscriptsyntax as rs

n = 10

for x in range(n+1):
    for y in range(n+1):
        if(y > x and y > -x + n):
            rs.AddCircle([x, y, 0.0], 0.5)

4. Practice 2