title
Coding Challenge #89: Langton's Ant

description
Langton's Ant is a cellular automaton that starts off with simples rules but takes on complex emergent behavior. Code: https://thecodingtrain.com/challenges/89-langtons-ant 🕹️ p5.js Web Editor Sketch: https://editor.p5js.org/codingtrain/sketches/svbAzt8sb 🎥 Next video: https://youtu.be/0L2n8Tg2FwI?list=PLRqwX-V7Uu6ZiZxtDDRCi6uhfTH4FilpH 🎥 All videos: https://www.youtube.com/playlist?list=PLRqwX-V7Uu6ZiZxtDDRCi6uhfTH4FilpH References: 📄 Langton's Ant on Wikipedia: https://en.wikipedia.org/wiki/Langton's_ant Videos: 🚂 Pixels! (Processing Tutorial): https://youtu.be/EmtU0eloTlE 🐜 Langton's Ant: https://youtu.be/NWBToaXK5T0 Related Coding Challenges: 🚂 #85 The Game of Life: https://youtu.be/FWSR_7kZuYg 🚂 #102 2D Water Ripple: https://youtu.be/BZUdGqeOD0w Timestamps: 0:00 Introduction and setup code! 1:46 Writing the algorithm for the motion of Langton's ant 9:09 Visualizing Langton's Ant 12:33 Debugging and testing! 14:53 Refactoring the code! 20:06 Things to try! 20:46 Outro! Editing by Mathieu Blanchette Animations by Jason Heglund Music from Epidemic Sound 🚂 Website: http://thecodingtrain.com/ 👾 Share Your Creation! https://thecodingtrain.com/guides/passenger-showcase-guide 🚩 Suggest Topics: https://github.com/CodingTrain/Suggestion-Box 💡 GitHub: https://github.com/CodingTrain 💬 Discord: https://discord.gg/hPuGy2g 💖 Membership: http://youtube.com/thecodingtrain/join 🛒 Store: https://standard.tv/codingtrain 🖋️ Twitter: https://twitter.com/thecodingtrain 📸 Instagram: https://www.instagram.com/the.coding.train/ 🎥 Coding Challenges: https://www.youtube.com/playlist?list=PLRqwX-V7Uu6ZiZxtDDRCi6uhfTH4FilpH 🎥 Intro to Programming: https://www.youtube.com/playlist?list=PLRqwX-V7Uu6Zy51Q-x9tMWIv9cueOFTFA 🔗 p5.js: https://p5js.org 🔗 p5.js Web Editor: https://editor.p5js.org/ 🔗 Processing: https://processing.org 📄 Code of Conduct: https://github.com/CodingTrain/Code-of-Conduct This description was auto-generated. If you see a problem, please open an issue: https://github.com/CodingTrain/thecodingtrain.com/issues/new #langtonsant #cellularautomata #processing #java

detail
{'title': "Coding Challenge #89: Langton's Ant", 'heatmap': [{'end': 320.191, 'start': 288.925, 'weight': 0.761}, {'end': 694.336, 'start': 675.612, 'weight': 0.761}, {'end': 1171.824, 'start': 1158.977, 'weight': 0.944}, {'end': 1208.653, 'start': 1193.945, 'weight': 0.793}], 'summary': "Discusses implementing langton's ant in processing and javascript, visualizing langston's ant algorithm, rendering and optimizing animation in processing for 11,000 iterations, and optimizing code for efficiency and colorfulness.", 'chapters': [{'end': 96.884, 'segs': [{'end': 31.564, 'src': 'embed', 'start': 0.943, 'weight': 0, 'content': [{'end': 2.845, 'text': 'Okay, here we are, a coding challenge.', 'start': 0.943, 'duration': 1.902}, {'end': 9.01, 'text': "This coding challenge I'm going to do in processing, and I'm going to attempt to implement this thing called Langton's Ant.", 'start': 2.905, 'duration': 6.105}, {'end': 13.774, 'text': 'Now, one thing I might recommend is go back and watch my Game of Life coding challenge,', 'start': 9.15, 'duration': 4.624}, {'end': 15.836, 'text': "because there's going to be a lot of similarities between these two.", 'start': 13.774, 'duration': 2.062}, {'end': 18.298, 'text': 'This is an example of another cellular automata system.', 'start': 16.096, 'duration': 2.202}, {'end': 23.001, 'text': "However, I'm going to do this one in processing so we just sort of see a different environment.", 'start': 19.119, 'duration': 3.882}, {'end': 26.042, 'text': 'I will, of course, make a port to JavaScript.', 'start': 23.241, 'duration': 2.801}, {'end': 31.564, 'text': 'So if you make your own variation of this and want to share it on the web, you can look at the p5.js version of this.', 'start': 26.062, 'duration': 5.502}], 'summary': "Implementing langton's ant in processing, with plans for a javascript port.", 'duration': 30.621, 'max_score': 0.943, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/G1EgjgMo48U/pics/G1EgjgMo48U943.jpg'}, {'end': 71.304, 'src': 'embed', 'start': 31.884, 'weight': 1, 'content': [{'end': 42.946, 'text': 'So what do I need? What I need for a cellular automata system just like, and is it automata, is it automata? Darn it, I can never get this right.', 'start': 31.884, 'duration': 11.062}, {'end': 44.95, 'text': 'I need to have a two-dimensional array.', 'start': 43.607, 'duration': 1.343}, {'end': 49.637, 'text': "And this is actually a place where I'm kind of happy that I'm using Java in processing,", 'start': 45.27, 'duration': 4.367}, {'end': 53.945, 'text': 'where I can say I can make this grid a new two-dimensional array.', 'start': 49.637, 'duration': 4.308}, {'end': 59.471, 'text': "And you know what, though? Guess what I'm going to do? I'm going to have every cell be an individual pixel.", 'start': 54.265, 'duration': 5.206}, {'end': 63.115, 'text': 'Because processing is pretty fast, I could do individual pixel settings.', 'start': 59.731, 'duration': 3.384}, {'end': 68.2, 'text': "So instead of having a grid of squares that are a larger size, I'm going to actually do it on the pixel by pixel level.", 'start': 63.255, 'duration': 4.945}, {'end': 68.941, 'text': "Let's see how that goes.", 'start': 68.22, 'duration': 0.721}, {'end': 71.304, 'text': "So let's just decide in advance.", 'start': 69.422, 'duration': 1.882}], 'summary': 'Creating a cellular automata system using a two-dimensional array and individual pixels in java processing.', 'duration': 39.42, 'max_score': 31.884, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/G1EgjgMo48U/pics/G1EgjgMo48U31884.jpg'}], 'start': 0.943, 'title': "Implementing langton's ant", 'summary': "Discusses implementing langton's ant in processing, using a two-dimensional array and individual pixel settings for quick processing. the speaker plans to create a port to javascript for web sharing.", 'chapters': [{'end': 96.884, 'start': 0.943, 'title': "Implementing langton's ant in processing", 'summary': "Discusses the implementation of langton's ant in processing, highlighting the use of a two-dimensional array and individual pixel settings for quick processing. the speaker also plans to create a port to javascript for web sharing.", 'duration': 95.941, 'highlights': ["The speaker discusses the implementation of Langton's Ant in Processing and plans to create a port to JavaScript for web sharing.", 'The use of a two-dimensional array is emphasized for creating the cellular automata system.', 'The decision to use individual pixel settings for quick processing in Processing is highlighted.']}], 'duration': 95.941, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/G1EgjgMo48U/pics/G1EgjgMo48U943.jpg', 'highlights': ["The speaker discusses the implementation of Langton's Ant in Processing and plans to create a port to JavaScript for web sharing.", 'The use of a two-dimensional array is emphasized for creating the cellular automata system.', 'The decision to use individual pixel settings for quick processing in Processing is highlighted.']}, {'end': 539.735, 'segs': [{'end': 197.447, 'src': 'embed', 'start': 141.182, 'weight': 0, 'content': [{'end': 145.623, 'text': "And the ant is going to start at 200, 200, okay? That's where the ant's going to start.", 'start': 141.182, 'duration': 4.441}, {'end': 147.443, 'text': 'I probably should say width divided by two, whatever.', 'start': 145.643, 'duration': 1.8}, {'end': 151.304, 'text': "So I'm going to say grid x, y equals one.", 'start': 148.104, 'duration': 3.2}, {'end': 152.965, 'text': "That's where the ant is.", 'start': 151.805, 'duration': 1.16}, {'end': 160.991, 'text': 'And actually, to be honest with you, maybe I should have that be the value two.', 'start': 155.069, 'duration': 5.922}, {'end': 164.292, 'text': "So I can have zero for, but let's keep going here.", 'start': 161.892, 'duration': 2.4}, {'end': 167.294, 'text': 'So the ant moves according to the rules below.', 'start': 164.853, 'duration': 2.441}, {'end': 172.095, 'text': 'At a white square, it turns 90 degrees right.', 'start': 167.694, 'duration': 4.401}, {'end': 182.599, 'text': "Okay, so actually, what I want to do is, each time, let's make a background of white.", 'start': 172.195, 'duration': 10.404}, {'end': 188.538, 'text': 'I need to figure out what is the state of the current spot where the ant is.', 'start': 182.599, 'duration': 5.939}, {'end': 192.462, 'text': 'So this is the state of the current spot where the ant is.', 'start': 189.92, 'duration': 2.542}, {'end': 197.447, 'text': 'So if the ant, we can look at these rules.', 'start': 193.083, 'duration': 4.364}], 'summary': 'Ant starts at 200, 200 and follows rules based on grid color', 'duration': 56.265, 'max_score': 141.182, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/G1EgjgMo48U/pics/G1EgjgMo48U141182.jpg'}, {'end': 320.191, 'src': 'heatmap', 'start': 288.925, 'weight': 0.761, 'content': [{'end': 290.505, 'text': 'Subtracting one is turning left.', 'start': 288.925, 'duration': 1.58}, {'end': 300.615, 'text': 'So this should actually be up is zero, right is two, is one, down is two, and left is three.', 'start': 291.528, 'duration': 9.087}, {'end': 312.204, 'text': "So if the state is white and I'll have white be one? no, white should be zero, because they're all starting as zero because I'm filling it with white.", 'start': 301.536, 'duration': 10.668}, {'end': 320.191, 'text': 'So if the state is zero, the ant should turn right, meaning ant just direction plus plus.', 'start': 312.224, 'duration': 7.967}], 'summary': "Ant's movements are determined by the state and direction, with white being zero and left being three.", 'duration': 31.266, 'max_score': 288.925, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/G1EgjgMo48U/pics/G1EgjgMo48U288925.jpg'}], 'start': 96.884, 'title': "Implementing langton's ant cellular automata", 'summary': "Discusses the implementation of langton's ant cellular automata in javascript, detailing the rules and movement of the ant on a grid, including the flipping of colors and movement direction.", 'chapters': [{'end': 539.735, 'start': 96.884, 'title': "Langton's ant cellular automata", 'summary': "Discusses the implementation of langton's ant cellular automata in javascript, detailing the rules and movement of the ant on a grid, including the flipping of colors and movement direction.", 'duration': 442.851, 'highlights': ["The ant starts at location (200, 200) and moves according to specific rules based on the color of the square it's on. The ant's starting position and movement rules are defined, with the ant initially placed at coordinates (200, 200) and its subsequent movement determined by the color of the square it's on.", "Rules dictate the ant's behavior when encountering white or black squares, including turning directions and color flipping. Detailed explanation of how the ant's behavior is defined when encountering white or black squares, specifying turning directions and the flipping of square colors.", "The implementation of functions to handle the ant's movement and edge wrapping to ensure proper grid traversal. In-depth description of the functions implemented to manage the ant's movement and edge wrapping to ensure correct traversal of the grid."]}], 'duration': 442.851, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/G1EgjgMo48U/pics/G1EgjgMo48U96884.jpg', 'highlights': ["The ant starts at location (200, 200) and moves according to specific rules based on the color of the square it's on.", "Rules dictate the ant's behavior when encountering white or black squares, including turning directions and color flipping.", "The implementation of functions to handle the ant's movement and edge wrapping to ensure proper grid traversal."]}, {'end': 694.336, 'segs': [{'end': 694.336, 'src': 'heatmap', 'start': 669.038, 'weight': 0, 'content': [{'end': 674.561, 'text': "Otherwise, if it's equal to 1, but that's the only other possibility, set that pixel to black.", 'start': 669.038, 'duration': 5.523}, {'end': 683.954, 'text': "And we should see this is just rendering the results of Langston's ant with each and every pixel as a cell in the grid.", 'start': 675.612, 'duration': 8.342}, {'end': 684.814, 'text': "So let's run this.", 'start': 684.034, 'duration': 0.78}, {'end': 688.035, 'text': 'And we can kind of zoom in and see.', 'start': 686.634, 'duration': 1.401}, {'end': 689.195, 'text': 'is this the correct pattern??', 'start': 688.035, 'duration': 1.16}, {'end': 694.336, 'text': 'Can anyone confirm or deny for me that this is the correct pattern??', 'start': 690.335, 'duration': 4.001}], 'summary': "Rendering langston's ant results in grid cells, zooming in to confirm pattern.", 'duration': 25.298, 'max_score': 669.038, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/G1EgjgMo48U/pics/G1EgjgMo48U669038.jpg'}], 'start': 541.036, 'title': "Visualizing langston's ant", 'summary': "Details the process of visualizing langston's ant algorithm in processing, covering grid iteration, pixel manipulation, rendering, and highlighting the approach's efficiency and visual output.", 'chapters': [{'end': 694.336, 'start': 541.036, 'title': "Visualizing langston's ant", 'summary': "Describes the process of visualizing langston's ant algorithm in processing, including iterating through a grid, manipulating pixel locations, and rendering the results, while emphasizing the efficiency of the approach and its visual output.", 'duration': 153.3, 'highlights': ["The pixel location is i times width plus j, and the pixel colors are stored in a one-dimensional array, with the manipulation of pixel colors based on the grid values (0 or 1) rendering the results of Langston's ant algorithm.", "Efficiency is emphasized as only one pixel needs to be changed per frame, showcasing the visual output of Langston's ant algorithm with each pixel representing a cell in the grid.", "The process includes iterating through a grid, manipulating pixel locations, and rendering the results of Langston's ant algorithm in Processing, with the visualization showcasing the correct pattern of the algorithm's output."]}], 'duration': 153.3, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/G1EgjgMo48U/pics/G1EgjgMo48U541036.jpg', 'highlights': ["Efficiency is emphasized as only one pixel needs to be changed per frame, showcasing the visual output of Langston's ant algorithm with each pixel representing a cell in the grid.", "The process includes iterating through a grid, manipulating pixel locations, and rendering the results of Langston's ant algorithm in Processing, with the visualization showcasing the correct pattern of the algorithm's output.", "The pixel location is i times width plus j, and the pixel colors are stored in a one-dimensional array, with the manipulation of pixel colors based on the grid values (0 or 1) rendering the results of Langston's ant algorithm."]}, {'end': 894.86, 'segs': [{'end': 868.171, 'src': 'embed', 'start': 723.076, 'weight': 0, 'content': [{'end': 727.097, 'text': "I'm going to just run through the whole algorithm 11,000 times.", 'start': 723.076, 'duration': 4.021}, {'end': 730.018, 'text': "Then I'm going to render it, and I'm going to say no loop.", 'start': 727.658, 'duration': 2.36}, {'end': 731.159, 'text': "So it's only going to do it once.", 'start': 730.339, 'duration': 0.82}, {'end': 740.774, 'text': 'So this is, instead of watching it animate, that looks pretty good, right? That looks exactly like, hopefully, that.', 'start': 732.862, 'duration': 7.912}, {'end': 745.397, 'text': "I can verify that these, oh, well it's flipped.", 'start': 742.995, 'duration': 2.402}, {'end': 749.519, 'text': "But that's fine, because y is up, you can flip it if you want.", 'start': 745.617, 'duration': 3.902}, {'end': 750.42, 'text': 'I flipped it, fine.', 'start': 749.619, 'duration': 0.801}, {'end': 751.941, 'text': 'Okay, great, so that is working.', 'start': 750.48, 'duration': 1.461}, {'end': 758.245, 'text': "We're done, yay! But this is making me crazy, because I'm only changing one pixel every frame.", 'start': 752.661, 'duration': 5.584}, {'end': 761.867, 'text': "So I can't bear to leave it this way.", 'start': 759.266, 'duration': 2.601}, {'end': 765.63, 'text': "I'm going to do one, there's so much refactoring of this that you could do.", 'start': 762.027, 'duration': 3.603}, {'end': 773.894, 'text': "And actually I'm going to leave that in here because one thing but just having this in here, by the way, and taking out the no loop,", 'start': 766.511, 'duration': 7.383}, {'end': 776.515, 'text': 'this I can make it appear to run much faster.', 'start': 773.894, 'duration': 2.621}, {'end': 783.698, 'text': 'This is doing five cycles per frame of animation.', 'start': 777.015, 'duration': 6.683}, {'end': 789.761, 'text': 'So to make this more clear, what if I did 100 cycles per frame of animation? Whoops.', 'start': 783.978, 'duration': 5.783}, {'end': 794.323, 'text': 'You can see that this is happening much faster now.', 'start': 791.982, 'duration': 2.341}, {'end': 797.351, 'text': 'Oh, whoops, we have an error.', 'start': 796.031, 'duration': 1.32}, {'end': 799.332, 'text': 'Array out of bounds exception.', 'start': 797.511, 'duration': 1.821}, {'end': 806.394, 'text': "Okay, where did I not, what did I not do correctly? Ah, it's greater than width minus one.", 'start': 799.792, 'duration': 6.602}, {'end': 809.695, 'text': 'Greater than height minus one.', 'start': 808.734, 'duration': 0.961}, {'end': 810.875, 'text': 'Okay, good thing I checked that.', 'start': 809.755, 'duration': 1.12}, {'end': 812.495, 'text': "Let's try this again.", 'start': 811.815, 'duration': 0.68}, {'end': 816.216, 'text': 'Yeah, there we go.', 'start': 815.596, 'duration': 0.62}, {'end': 821.457, 'text': "So we're going to get some pretty crazy patterns after a while.", 'start': 818.817, 'duration': 2.64}, {'end': 829.792, 'text': "Whoa And I'm sure you could be clever and think about modifying the rules to use color, maybe get multiple states.", 'start': 822.618, 'duration': 7.174}, {'end': 835.235, 'text': 'So this is actually running super fast, because processing can really handle doing it at this resolution.', 'start': 830.173, 'duration': 5.062}, {'end': 839.276, 'text': "But we could ask, what if I do this at 1,200 by 800? So we also had an error if it's not a square.", 'start': 835.275, 'duration': 4.001}, {'end': 842.798, 'text': 'So I have to fix that.', 'start': 839.297, 'duration': 3.501}, {'end': 853.384, 'text': 'i times width plus j.', 'start': 850.562, 'duration': 2.822}, {'end': 855.705, 'text': 'Oh my goodness, I have this totally wrong.', 'start': 853.384, 'duration': 2.321}, {'end': 859.527, 'text': 'That formula worked.', 'start': 858.566, 'duration': 0.961}, {'end': 861.387, 'text': "That's why I was on its size.", 'start': 860.307, 'duration': 1.08}, {'end': 863.368, 'text': 'I had this formula wrong the whole time.', 'start': 861.608, 'duration': 1.76}, {'end': 866.11, 'text': 'I referenced my tutorials and everything.', 'start': 864.469, 'duration': 1.641}, {'end': 867.11, 'text': 'I just did it really quickly.', 'start': 866.13, 'duration': 0.98}, {'end': 868.171, 'text': 'That formula was wrong.', 'start': 867.29, 'duration': 0.881}], 'summary': 'Algorithm run 11,000 times, rendering once, with some errors and refactoring discussed.', 'duration': 145.095, 'max_score': 723.076, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/G1EgjgMo48U/pics/G1EgjgMo48U723076.jpg'}], 'start': 696.336, 'title': 'Algorithm rendering check and optimizing animation in processing', 'summary': 'Demonstrates rendering an algorithm and verifying its correctness through 11,000 iterations and optimizing animation in processing by increasing cycles per frame, handling errors, fixing formulas, and exploring efficiency in handling super fast resolutions.', 'chapters': [{'end': 773.894, 'start': 696.336, 'title': 'Algorithm rendering check', 'summary': 'Demonstrates the process of rendering an algorithm and verifying its correctness through 11,000 iterations, while also addressing the issue of pixel manipulation and the potential for refactoring.', 'duration': 77.558, 'highlights': ['The chapter demonstrates the process of rendering an algorithm and verifying its correctness through 11,000 iterations.', 'The issue of pixel manipulation is addressed, highlighting the need for refactoring.', 'The process involves running through the algorithm 11,000 times to render it and verify its accuracy.']}, {'end': 894.86, 'start': 773.894, 'title': 'Optimizing animation in processing', 'summary': 'Demonstrates optimizing animation in processing by increasing cycles per frame, handling errors, fixing formulas, and exploring efficiency in handling super fast resolutions.', 'duration': 120.966, 'highlights': ['By increasing the cycles per frame from 5 to 100, the animation appears much faster, but an array out of bounds exception occurs, emphasizing the need to handle errors effectively.', "The demonstration of fixing the formula for indexing pixels by correcting the calculation from 'i times width plus j' to 'j times width plus i' showcases the importance of meticulous coding in the optimization process.", 'The exploration of running the animation at a higher resolution of 1200 by 800 highlights the capability of Processing in handling super fast resolutions and the potential for further efficiency improvements.', "The mention of modifying rules to use color and introducing multiple states hints at the possibility of enhancing the animation's visual appeal and complexity, contributing to the broader exploration of optimization strategies in Processing."]}], 'duration': 198.524, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/G1EgjgMo48U/pics/G1EgjgMo48U696336.jpg', 'highlights': ['Demonstrates rendering an algorithm and verifying its correctness through 11,000 iterations.', "Fixing the formula for indexing pixels by correcting the calculation from 'i times width plus j' to 'j times width plus i' showcases the importance of meticulous coding in the optimization process.", 'Exploration of running the animation at a higher resolution of 1200 by 800 highlights the capability of Processing in handling super fast resolutions and the potential for further efficiency improvements.', "The mention of modifying rules to use color and introducing multiple states hints at the possibility of enhancing the animation's visual appeal and complexity, contributing to the broader exploration of optimization strategies in Processing.", 'By increasing the cycles per frame from 5 to 100, the animation appears much faster, but an array out of bounds exception occurs, emphasizing the need to handle errors effectively.', 'The issue of pixel manipulation is addressed, highlighting the need for refactoring.', 'The process involves running through the algorithm 11,000 times to render it and verify its accuracy.']}, {'end': 1245.69, 'segs': [{'end': 940.72, 'src': 'embed', 'start': 895.32, 'weight': 1, 'content': [{'end': 897.742, 'text': "So one way that I'm going to do that is I'm going to make a P image.", 'start': 895.32, 'duration': 2.422}, {'end': 899.082, 'text': "I'm going to call that ant.", 'start': 897.762, 'duration': 1.32}, {'end': 905.005, 'text': "And I'm going to say ant equals create image with height RGB.", 'start': 900.163, 'duration': 4.842}, {'end': 906.766, 'text': 'So I want an RGB image.', 'start': 905.365, 'duration': 1.401}, {'end': 911.642, 'text': 'And I want that to be white to start with.', 'start': 907.879, 'duration': 3.763}, {'end': 921.067, 'text': "So there's probably a way for me to do this more efficiently, but I'm just going to set every pixel of that image to white.", 'start': 912.062, 'duration': 9.005}, {'end': 940.72, 'text': "So I'm going to set every pixel to white and I'm going to say ant.loadPixels, ant.updatePixels, and then I'm going to instead of doing all this,", 'start': 923.149, 'duration': 17.571}], 'summary': "Creating a white rgb image named 'ant' and setting all its pixels to white.", 'duration': 45.4, 'max_score': 895.32, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/G1EgjgMo48U/pics/G1EgjgMo48U895320.jpg'}, {'end': 1188.449, 'src': 'heatmap', 'start': 1158.977, 'weight': 0.944, 'content': [{'end': 1160.878, 'text': 'And it should have no problem doing this super fast.', 'start': 1158.977, 'duration': 1.901}, {'end': 1165.262, 'text': "Let's let this run for a little while.", 'start': 1163.942, 'duration': 1.32}, {'end': 1167.803, 'text': "I'll be back in a minute or two.", 'start': 1166.143, 'duration': 1.66}, {'end': 1169.484, 'text': 'This will be it.', 'start': 1168.843, 'duration': 0.641}, {'end': 1171.824, 'text': "And you'll see me again after this ran for a while.", 'start': 1169.764, 'duration': 2.06}, {'end': 1176.065, 'text': "Oh, I'm back from you waiting because I think I got this wrong.", 'start': 1172.905, 'duration': 3.16}, {'end': 1179.947, 'text': "It should be black if it's 1.", 'start': 1177.126, 'duration': 2.821}, {'end': 1181.227, 'text': 'So hold on a sec.', 'start': 1179.947, 'duration': 1.28}, {'end': 1182.507, 'text': "Let's run this again.", 'start': 1181.767, 'duration': 0.74}, {'end': 1184.348, 'text': 'There we go.', 'start': 1182.527, 'duration': 1.821}, {'end': 1188.449, 'text': 'And again, this is going to run for a while.', 'start': 1186.448, 'duration': 2.001}], 'summary': 'Testing process experienced minor issues but now running smoothly.', 'duration': 29.472, 'max_score': 1158.977, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/G1EgjgMo48U/pics/G1EgjgMo48U1158977.jpg'}, {'end': 1245.69, 'src': 'heatmap', 'start': 1193.945, 'weight': 0, 'content': [{'end': 1195.266, 'text': 'Okay, so this is what it got to.', 'start': 1193.945, 'duration': 1.321}, {'end': 1199.248, 'text': 'You can sort of zoom in here and see what sort of interesting, beautiful patterns are here.', 'start': 1195.286, 'duration': 3.962}, {'end': 1204.851, 'text': "Someone in the chat told me there's a Numberphile video about Langston's Ant, which you can get more of the background,", 'start': 1199.748, 'duration': 5.103}, {'end': 1206.412, 'text': 'the history of it and the possibilities.', 'start': 1204.851, 'duration': 1.561}, {'end': 1208.653, 'text': "I would encourage you, here's some things you could do.", 'start': 1206.952, 'duration': 1.701}, {'end': 1211.174, 'text': 'You could refactor my code to make it more efficient.', 'start': 1208.693, 'duration': 2.481}, {'end': 1215.477, 'text': 'You could think about how would you make this have color in an interesting way.', 'start': 1212.235, 'duration': 3.242}, {'end': 1220.099, 'text': "Maybe the grid isn't, isn't just pixels.", 'start': 1215.797, 'duration': 4.302}, {'end': 1222.18, 'text': "Maybe it's not even just squares.", 'start': 1220.359, 'duration': 1.821}, {'end': 1224.341, 'text': "Maybe it's a grid of interesting shapes or patterns.", 'start': 1222.22, 'duration': 2.121}, {'end': 1225.461, 'text': 'You use color in some way.', 'start': 1224.361, 'duration': 1.1}, {'end': 1231.804, 'text': "What kind of beautiful thing can you make from Langton's ant? And if you want to make this run on the web, take a look.", 'start': 1225.821, 'duration': 5.983}, {'end': 1234.325, 'text': "I'll also create a JavaScript version of this.", 'start': 1232.104, 'duration': 2.221}, {'end': 1239.807, 'text': "But again, I think if you want to get this sort of like full screen speed of it, you're probably going to want to do it in processing.", 'start': 1234.385, 'duration': 5.422}, {'end': 1242.569, 'text': 'So thanks, everybody.', 'start': 1240.888, 'duration': 1.681}, {'end': 1245.69, 'text': 'And see you soon.', 'start': 1243.589, 'duration': 2.101}], 'summary': "Encouraging viewers to explore optimizing langton's ant code for efficiency, incorporating color and different shapes, and providing resources and suggestions for further exploration.", 'duration': 40.839, 'max_score': 1193.945, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/G1EgjgMo48U/pics/G1EgjgMo48U1193945.jpg'}], 'start': 895.32, 'title': "Implementing langton's ant", 'summary': "Details the process of implementing langton's ant in pimage, optimizing the code for efficiency, and encourages refactoring to make it more efficient and colorful.", 'chapters': [{'end': 1245.69, 'start': 895.32, 'title': "Implementing langton's ant in pimage", 'summary': "Details the process of implementing langton's ant in pimage, optimizing the code for efficiency, and encourages refactoring to make it more efficient and colorful.", 'duration': 350.37, 'highlights': ["Implementing Langton's Ant in PImage, optimizing the code for efficiency, and encouraging refactoring to make it more efficient and colorful.", "Creating a PImage named 'ant' with an RGB image and setting every pixel to white, then optimizing the code for efficiency.", 'Discussing the possibilities of making the implementation more efficient and colorful by refactoring the code and using color in an interesting way.']}], 'duration': 350.37, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/G1EgjgMo48U/pics/G1EgjgMo48U895320.jpg', 'highlights': ["Implementing Langton's Ant in PImage, optimizing the code for efficiency, and encouraging refactoring to make it more efficient and colorful.", "Creating a PImage named 'ant' with an RGB image and setting every pixel to white, then optimizing the code for efficiency.", 'Discussing the possibilities of making the implementation more efficient and colorful by refactoring the code and using color in an interesting way.']}], 'highlights': ["The speaker discusses the implementation of Langton's Ant in Processing and plans to create a port to JavaScript for web sharing.", 'The use of a two-dimensional array is emphasized for creating the cellular automata system.', 'The decision to use individual pixel settings for quick processing in Processing is highlighted.', "The ant starts at location (200, 200) and moves according to specific rules based on the color of the square it's on.", "Rules dictate the ant's behavior when encountering white or black squares, including turning directions and color flipping.", "The implementation of functions to handle the ant's movement and edge wrapping to ensure proper grid traversal.", "Efficiency is emphasized as only one pixel needs to be changed per frame, showcasing the visual output of Langston's ant algorithm with each pixel representing a cell in the grid.", "The process includes iterating through a grid, manipulating pixel locations, and rendering the results of Langston's ant algorithm in Processing, with the visualization showcasing the correct pattern of the algorithm's output.", "The pixel location is i times width plus j, and the pixel colors are stored in a one-dimensional array, with the manipulation of pixel colors based on the grid values (0 or 1) rendering the results of Langston's ant algorithm.", 'Demonstrates rendering an algorithm and verifying its correctness through 11,000 iterations.', "Fixing the formula for indexing pixels by correcting the calculation from 'i times width plus j' to 'j times width plus i' showcases the importance of meticulous coding in the optimization process.", 'Exploration of running the animation at a higher resolution of 1200 by 800 highlights the capability of Processing in handling super fast resolutions and the potential for further efficiency improvements.', "The mention of modifying rules to use color and introducing multiple states hints at the possibility of enhancing the animation's visual appeal and complexity, contributing to the broader exploration of optimization strategies in Processing.", 'By increasing the cycles per frame from 5 to 100, the animation appears much faster, but an array out of bounds exception occurs, emphasizing the need to handle errors effectively.', 'The issue of pixel manipulation is addressed, highlighting the need for refactoring.', 'The process involves running through the algorithm 11,000 times to render it and verify its accuracy.', "Implementing Langton's Ant in PImage, optimizing the code for efficiency, and encouraging refactoring to make it more efficient and colorful.", "Creating a PImage named 'ant' with an RGB image and setting every pixel to white, then optimizing the code for efficiency.", 'Discussing the possibilities of making the implementation more efficient and colorful by refactoring the code and using color in an interesting way.']}