diff --git a/projects/projectile/index.js b/projects/projectile/index.js index b279eff..29ebfba 100644 --- a/projects/projectile/index.js +++ b/projects/projectile/index.js @@ -1,14 +1,17 @@ let t=0; let v0=50 -let x0=0 +let x0=50 let y0=50 let g=9.81 let projectile= function (node){ node.setup = function() { - node.createCanvas(width, height); + c=node.createCanvas(width, height); + v0t=node.createElement('p', ''); + katex.render("v_0", v0t.elt); + v0t.elt.style.color="#b4b4b4" }; let width=800 let height=300 @@ -25,16 +28,29 @@ let projectile= function (node){ } node.draw = function() { - node.background(50); + node.background(70); node.noStroke(); dots.forEach((elt)=>{node.ellipse(elt[0],elt[1],5,5);}) + node.fill(255) node.ellipse(x(t),y(t),20,20); + node.fill(255) dots.push([x(t),y(t)]) if(t>50 || y(t)>height){ node.noLoop() } - t+=0.06 + t+=0.05 + node.push() + node.fill(22) + node.stroke(180) + m=draw_arrow(node,x0,height-y0,x0+v0,height-y0-v0) + console.log(m.y) + v0t.position(c.position().x+m.x,c.position().y+m.y) + node.pop() }; + node.windowResized = function(){ + v0t.position(c.position().x+m.x,c.position().y+m.y) + + } }; refresh=function(){ diff --git a/template.html b/template.html index 7eb17ef..cb27812 100644 --- a/template.html +++ b/template.html @@ -4,11 +4,23 @@ Physics Simulation - - + + + + + + + + + + + + + @@ -36,7 +48,7 @@
-
+
diff --git a/www/js/p5_custom.js b/www/js/p5_custom.js new file mode 100644 index 0000000..b25e636 --- /dev/null +++ b/www/js/p5_custom.js @@ -0,0 +1,15 @@ + +draw_arrow=function(p,x1,y1,x2,y2){ + p.push() + p.strokeWeight(5) + p.line(x1,y1,x2,y2) + offset=5 + var angle = p.atan2(y1 - y2, x1 - x2); //gets the angle of the line + p.translate(x2, y2); //translates to the destination vertex + p.rotate(angle-p.HALF_PI); //rotates the arrow point + p.triangle(-offset*0.8, offset, offset*0.8, offset, 0, -offset/2); //draws the arrow point as a triangle + p.pop(); + + // Return the center of the arrow + return(p.createVector(x1+(x2-x1)/2,y1+(y2-y1)/2)) +}