Geek points if you understand this. Double points if you can do it - - PowerPoint PPT Presentation

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Geek points if you understand this. Double points if you can do it - - PowerPoint PPT Presentation

Oct 09, 2023 358 likes •693 views

Geek points if you understand this. Double points if you can do it in your head. What can we do to improve drawBorder() ? Drawing two vertical lines uses one "recipe"! Each uses a different y value. So: Create a parameterized method

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SLIDE 1

Geek points if you understand this. Double points if you can do it in your head.

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SLIDE 2

What can we do to improve drawBorder()?

Drawing two vertical lines uses one "recipe"! Each uses a different y value. So: Create a parameterized method to draw a vertical line. Do the same for horizontal lines. Make the size of the border a parameter. Make the size of the border grow with the size of the image. Others?

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SLIDE 3

STEP BY STEP

public void lighter( double amount ) { Pixel[] pixels = this.getPixels(); double factor = 1 + amount; for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } }

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SLIDE 4

STEP BY STEP

Pixel[] pixels = this.getPixels(); double factor = 1 + amount; pixels Pixel[0] Pixel red=127 green=163 blue=197 Pixel[1] Pixel red=127 green=163 blue=197 Pixel[2] Pixel red=128 green=164 blue=198 ... factor 1.5

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SLIDE 5

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } pixels Pixel[0] Pixel red=127 green=163 blue=197 Pixel[1] Pixel red=127 green=163 blue=197 Pixel[2] Pixel red=128 green=164 blue=198 ... factor 1.5

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SLIDE 6

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } pixels Pixel[0] Pixel red=127 green=163 blue=197 Pixel[1] Pixel red=127 green=163 blue=197 Pixel[2] Pixel red=128 green=164 blue=198 ... factor 1.5 i

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SLIDE 7

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } pixels Pixel[0] Pixel red=127 green=163 blue=197 Pixel[1] Pixel red=127 green=163 blue=197 Pixel[2] Pixel red=128 green=164 blue=198 ... factor 1.5 i

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SLIDE 8

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } p -> Pixel[0] Pixel red=127 green=163 blue=197 Pixel[1] Pixel red=127 green=163 blue=197 Pixel[2] Pixel red=128 green=164 blue=198 ... factor 1.5 i

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SLIDE 9

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } p -> Pixel[0] Pixel red=190 green=163 blue=197 Pixel[1] Pixel red=127 green=163 blue=197 Pixel[2] Pixel red=128 green=164 blue=198 ... factor 1.5 i

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SLIDE 10

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } p -> Pixel[0] Pixel red=190 green=244 blue=197 Pixel[1] Pixel red=127 green=163 blue=197 Pixel[2] Pixel red=128 green=164 blue=198 ... factor 1.5 i

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SLIDE 11

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } p -> Pixel[0] Pixel red=190 green=244 blue=295 Pixel[1] Pixel red=127 green=163 blue=197 Pixel[2] Pixel red=128 green=164 blue=198 ... factor 1.5 i

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SLIDE 12

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } p -> Pixel[0] Pixel red=190 green=244 blue=295 Pixel[1] Pixel red=127 green=163 blue=197 Pixel[2] Pixel red=128 green=164 blue=198 ... factor 1.5 i

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SLIDE 13

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } p -> Pixel[0] Pixel red=190 green=244 blue=295 Pixel[1] Pixel red=127 green=163 blue=197 Pixel[2] Pixel red=128 green=164 blue=198 ... factor 1.5 i 1

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SLIDE 14

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } p -> Pixel[0] Pixel red=190 green=244 blue=295 Pixel[1] Pixel red=127 green=163 blue=197 Pixel[2] Pixel red=128 green=164 blue=198 ... factor 1.5 i 1

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SLIDE 15

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } Pixel[0] Pixel red=190 green=244 blue=295 p -> Pixel[1] Pixel red=127 green=163 blue=197 Pixel[2] Pixel red=128 green=164 blue=198 ... factor 1.5 i 1

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SLIDE 16

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } Pixel[0] Pixel red=190 green=244 blue=295 p -> Pixel[1] Pixel red=190 green=163 blue=197 Pixel[2] Pixel red=128 green=164 blue=198 ... factor 1.5 i 1

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SLIDE 17

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } Pixel[0] Pixel red=190 green=244 blue=295 p -> Pixel[1] Pixel red=190 green=244 blue=197 Pixel[2] Pixel red=128 green=164 blue=198 ... factor 1.5 i 1

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SLIDE 18

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } Pixel[0] Pixel red=190 green=244 blue=295 p -> Pixel[1] Pixel red=190 green=244 blue=295 Pixel[2] Pixel red=128 green=164 blue=198 ... factor 1.5 i 1

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SLIDE 19

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } Pixel[0] Pixel red=190 green=244 blue=295 p -> Pixel[1] Pixel red=190 green=244 blue=295 Pixel[2] Pixel red=128 green=164 blue=198 ... factor 1.5 i 2

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SLIDE 20

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } Pixel[0] Pixel red=190 green=244 blue=295 p -> Pixel[1] Pixel red=190 green=244 blue=295 Pixel[2] Pixel red=128 green=164 blue=198 ... factor 1.5 i 2

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SLIDE 21

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } Pixel[0] Pixel red=190 green=244 blue=295 Pixel[0] Pixel red=190 green=244 blue=295 p -> Pixel[0] Pixel red=128 green=164 blue=198 ... factor 1.5 i 2 ... AND SO ON

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SLIDE 22

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } ... Pixel[179197] Pixel red=69 green=75 blue=30 p -> Pixel[179198] Pixel red=69 green=75 blue=30 Pixel[179199] Pixel red=40 green=50 blue=18 factor 1.5 i 179198

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SLIDE 23

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } ... Pixel[179197] Pixel red=69 green=75 blue=30 p -> Pixel[179198] Pixel red=69 green=75 blue=30 Pixel[179199] Pixel red=40 green=50 blue=18 factor 1.5 i 179199

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SLIDE 24

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } ... Pixel[179197] Pixel red=69 green=75 blue=30 Pixel[179198] Pixel red=69 green=75 blue=30 p -> Pixel[179199] Pixel red=40 green=50 blue=18 factor 1.5 i 179199

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SLIDE 25

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } ... Pixel[179197] Pixel red=69 green=75 blue=30 Pixel[179198] Pixel red=69 green=75 blue=30 p -> Pixel[179199] Pixel red=60 green=50 blue=18 factor 1.5 i 179199

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SLIDE 26

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } ... Pixel[179197] Pixel red=69 green=75 blue=30 Pixel[179198] Pixel red=69 green=75 blue=30 p -> Pixel[179199] Pixel red=60 green=75 blue=18 factor 1.5 i 179199

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SLIDE 27

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } ... Pixel[179197] Pixel red=69 green=75 blue=30 Pixel[179198] Pixel red=69 green=75 blue=30 p -> Pixel[179199] Pixel red=60 green=75 blue=27 factor 1.5 i 179199

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SLIDE 28

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } ... Pixel[179197] Pixel red=69 green=75 blue=30 Pixel[179198] Pixel red=69 green=75 blue=30 p -> Pixel[179199] Pixel red=60 green=75 blue=27 factor 1.5 i 179200

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SLIDE 29

STEP BY STEP

for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } ... Pixel[179197] Pixel red=69 green=75 blue=30 Pixel[179198] Pixel red=69 green=75 blue=30 p -> Pixel[179199] Pixel red=60 green=75 blue=27 factor 1.5 i 179200 ... WHICH FAILS!

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SLIDE 30

STEP BY STEP

public void lighter( double amount ) { Pixel[] pixels = this.getPixels(); double factor = 1 + amount; for ( int i = 0; i < pixels.length; i++ ) { Pixel p = pixels[i]; p.setRed ( (int) (p.getRed () * factor) ); p.setGreen( (int) (p.getGreen() * factor) ); p.setBlue ( (int) (p.getBlue () * factor) ); } } pixels ... factor 1.5

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SLIDE 31

Quick Exercise

Suppose that I have declared this array:

double[] mileageForWeek = {3, 8, 10, 7, 10, 0, 20};

Write a for-loop to compute the total number of miles.

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SLIDE 32

Remember: No class Thursday (Optional HW 1 session)

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SLIDE 33