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Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Instructions The Koch snowflake is a fractal shape. At level O, the shape is an equilateral triangle. At level 1, each line segment is split into four equal parts, producing an equilateral bump in the middle of each segment. Figure 7-15 shows these shapes at levels 0, 1, and 2. ● Python Turtle Graphics Figure 7-15 First three levels of a Koch snowflake Figure 7-15 First three levels of a Koch snowflake Python Turtle Graphics At the top level, the script uses a function drawFractalLine to draw three fractal lines. Each line is specified by a given distance, direction (angle), and level: • The initial angles are 0, -120, and 120 degrees. • The initial distance can be any size, such as 200 pixels. • If the level is O, then the turtle moves the given distance in the given direction. Otherwise, the function draws four fractal lines with % of the given distance, angles that produce the given effect, and the given level minus 1. The function drawFractalLine is recursive. Write a script that draws the Koch snowflake. • Width = 200 • Height = 200 • Size = 150 • Level = 4 Grading ● Python Turtle Graphics Define a function main that will draw a Koch snowflake with the following parameters when the program run: When you have completed your program, click the Submit button to record your score.
Transcribed Image Text:Instructions The Koch snowflake is a fractal shape. At level O, the shape is an equilateral triangle. At level 1, each line segment is split into four equal parts, producing an equilateral bump in the middle of each segment. Figure 7-15 shows these shapes at levels 0, 1, and 2. ● Python Turtle Graphics Figure 7-15 First three levels of a Koch snowflake Figure 7-15 First three levels of a Koch snowflake Python Turtle Graphics At the top level, the script uses a function drawFractalLine to draw three fractal lines. Each line is specified by a given distance, direction (angle), and level: • The initial angles are 0, -120, and 120 degrees. • The initial distance can be any size, such as 200 pixels. • If the level is O, then the turtle moves the given distance in the given direction. Otherwise, the function draws four fractal lines with % of the given distance, angles that produce the given effect, and the given level minus 1. The function drawFractalLine is recursive. Write a script that draws the Koch snowflake. • Width = 200 • Height = 200 • Size = 150 • Level = 4 Grading ● Python Turtle Graphics Define a function main that will draw a Koch snowflake with the following parameters when the program run: When you have completed your program, click the Submit button to record your score.
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