21 Aug Computer Science Homework(Python)
This work should be working on Blender
Part 1: Creating the Monkey Head Grid
First, make sure you include the following at the top of your script file:
import bpy
from math import *
def selectAll():
# select objects by type
for o in bpy.data.objects:
if o.type == ‘MESH’:
o.select = True
else:
o.select = False
return
def clearAll():
selectAll()
bpy.ops.object.delete()
return
Then, write a Python function that, given an integer n, creates a n×n grid of monkey head objects:
- First, set two of the three axes (e.g., x and y) at –n, and the third axis to 0
- Use a pair of nested loops, each looping n times
- Inside the inner loop:
- create a monkey head (bpy.ops.mesh.primitive_monkey_add)
- move it to (x,y,z)
- set up the location of the next head by incrementing one of the axes
- for example, if you are creating the grid on the x and y axes, x = x + 3
- Inside the outer loop
- after each completion of the inner loop (creating a row of heads), increment the other axis by 3 and reset the first axis to –n
- for example, if you are creating the grid on the x and y axes, y = y + 3 and x = –n
- after each completion of the inner loop (creating a row of heads), increment the other axis by 3 and reset the first axis to –n
Test your function by first clearing the 3-D view (i.e., by calling the clearAll function), then calling your function with the value 10.
Part 2: Rotating the Monkey Heads
Once your function from Part 1 is working, write another Python function to simulate the Peevish Postman Problem by rotating the monkey heads:
- Select all of the monkey heads as a list variable, using bpy.context.selected_objects
- Set n to the size of your heads list (i.e., use the len() function)
- Set a rotation variable to 180 degrees in radians (use the function math.radians(180))
- De-select all of the objects:
for obj in bpy.data.objects:
obj.select = False - Again use a pair of nested loops:
- In the outer loop, loop from 1 to n (for example, loop i from 1 to n)
- In the inner loop, loop from the current value of i to n by increments of i (for example, loop j from i to n in increments of i)
- Inside, the inner loop, rotate the head at index j-1 by the rotation on the third axis
- for example, if you created the grid on the x and y axes, rotate by the rotation on the z axis:
heads[j-1].rotation_euler.z += rotation
- for example, if you created the grid on the x and y axes, rotate by the rotation on the z axis:
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