sketch<\/a>\n\n\n\n

Trees and birds and trees and birds<\/p><\/iframe><pre class=\"language-javascript\"><code class=\"p5_editor language-javascript\">var trees = [];\nvar birds = [];\nvar dx = -1;\n\nfunction setup() {\n createCanvas(400, 200);\n\n for (var i = 0; i < 10; i++){ \/\/populate trees\n var rx = random(width);\n trees[i] = makeTree(rx);\n }for (var i = 0; i < 3; i++){ \/\/populate birds\n var bx = random(width);\n birds[i] = makeTree(bx);\n }\n frameRate(10);\n}\n\n\nfunction draw() {\n background('lightblue');\n\n \/\/dirt\n noStroke();\n fill('darkgreen');\n rect(-10, 100, width+20, height);\n\n updateAndDisplayTrees();\n removeTree();\n newTree();\n\n updateAndDisplayBird();\n removeBird();\n newBird();\n\n drawRoad();\n}\n\nfunction drawRoad() {\n fill('grey');\n rect(-10, 130, width+20, 30);\n\n stroke('black');\n var dividerLines = [];\n for (var i = 0; i < 30; i++) { \/\/make vals\n var a = i*width\/30;\n dividerLines.push(a);\n } for (var i = 0; i < 30; i++) { \/\/draw lines\n line(dividerLines[i], 145, dividerLines[i]+width\/60, 145);\n } for (var i = 0; i < 30; i++) { \/\/move lines\n dividerLines[i] += dx;\n if (dividerLines[i] <= -width\/60) {\n dividerLines[i] = width;\n }\n }\n}\n\nfunction updateAndDisplayTrees(){\n for (var i = 0; i < trees.length; i++){\n trees[i].move();\n trees[i].display();\n }\n}\n\nfunction updateAndDisplayBird(){\n for (var i = 0; i < birds.length; i++){\n birds[i].move();\n birds[i].display();\n }\n}\n\nfunction removeTree(){\n var treesToKeep = [];\n for (var i = 0; i < trees.length; i++){\n if (trees[i].x > -50) {\n treesToKeep.push(trees[i]);\n }\n }\n trees = treesToKeep;\n}\n\nfunction removeBird(){\n var birdsToKeep = [];\n for (var i = 0; i < birds.length; i++){\n if (birds[i].x > -50) {\n birdsToKeep.push(birds[i]);\n }\n }\n birds = birdsToKeep;\n}\n\nfunction newTree() {\n var newTreeLikelihood = 0.02;\n if (random(0,1) < newTreeLikelihood) {\n trees.push(makeTree(width+50));\n }\n}\n\nfunction newBird() {\n var newBirdLikelihood = 0.05;\n if (random(0,1) < newBirdLikelihood) {\n birds.push(makeBird(width));\n }\n}\n\n\n\/\/ method to update position of Tree every frame\nfunction treeMove() {\n this.x += this.speed * this.scal\/3;\n}\n\nfunction birdMove() {\n this.x += this.speed;\n}\n\n\nfunction treeDisplay() {\n push();\n translate(this.x, 100);\n scale(this.scal)\n stroke('brown');\n strokeWeight(5);\n line(0, 0, 0, 20);\n\n stroke('green');\n fill('green');\n\n for (var i = 0; i < 5; i++) {\n triangle(-20+2*i, -7*i, -2, -7*i, -2, -20-7*i);\n } for (var i = 0; i < 5; i++) {\n triangle(20-2*i, -7*i, 2, -7*i, 2, -20-7*i);\n }\n pop();\n}\n\nfunction birdDisplay() {\n push();\n translate(this.x, this.y);\n stroke('black');\n noFill();\n strokeWeight(2);\n arc(0, 0, 20, 20, PI+PI\/3, 2*PI-PI\/3);\n arc(10, 0, 20, 20, PI+PI\/3, 2*PI-PI\/3);\n pop();\n}\n\n\nfunction makeTree(birthLocationX) {\n var tree = {x: birthLocationX,\n scal: random(0.5, 2),\n speed: dx,\n move: treeMove,\n display: treeDisplay}\n return tree;\n}\n\nfunction makeBird(birthLocationX) {\n var bird = {x: birthLocationX,\n y: random(0, 70),\n speed: random(-5,-2),\n move: birdMove,\n display: birdDisplay}\n return bird;\n}\n<\/code><\/pre><\/div><\/body><\/html>\n","protected":false},"excerpt":{"rendered":"<p>sketch Trees and birds and trees and birds var trees = []; var birds = []; var dx = -1; function setup() { createCanvas(400, 200); for (var i = 0; i < 10; i++){ \/\/populate trees var rx = random(width); trees[i] = makeTree(rx); }for (var i = 0; i < 3; i++){ \/\/populate birds var … <a href=\"https:\/\/courses.ideate.cmu.edu\/15-104\/f2021\/2021\/11\/16\/project-11-moving-landscape\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> “Project 11 – Moving Landscape”<\/span><\/a><\/p>\n","protected":false},"author":657,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[115,56,1],"tags":[],"_links":{"self":[{"href":"https:\/\/courses.ideate.cmu.edu\/15-104\/f2021\/wp-json\/wp\/v2\/posts\/69159"}],"collection":[{"href":"https:\/\/courses.ideate.cmu.edu\/15-104\/f2021\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/courses.ideate.cmu.edu\/15-104\/f2021\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/15-104\/f2021\/wp-json\/wp\/v2\/users\/657"}],"replies":[{"embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/15-104\/f2021\/wp-json\/wp\/v2\/comments?post=69159"}],"version-history":[{"count":2,"href":"https:\/\/courses.ideate.cmu.edu\/15-104\/f2021\/wp-json\/wp\/v2\/posts\/69159\/revisions"}],"predecessor-version":[{"id":69162,"href":"https:\/\/courses.ideate.cmu.edu\/15-104\/f2021\/wp-json\/wp\/v2\/posts\/69159\/revisions\/69162"}],"wp:attachment":[{"href":"https:\/\/courses.ideate.cmu.edu\/15-104\/f2021\/wp-json\/wp\/v2\/media?parent=69159"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/15-104\/f2021\/wp-json\/wp\/v2\/categories?post=69159"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/courses.ideate.cmu.edu\/15-104\/f2021\/wp-json\/wp\/v2\/tags?post=69159"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}