diff --git a/Catalogue/Scripts/debugFunctions.js b/Catalogue/Scripts/debugFunctions.js new file mode 100644 index 0000000..3bb3a85 --- /dev/null +++ b/Catalogue/Scripts/debugFunctions.js @@ -0,0 +1,21 @@ +function Draw_center() { + ctx.beginPath(); + ctx.moveTo(centerX - 100, centerY); + ctx.lineTo(centerX + 100, centerY); + ctx.moveTo(centerX, centerY - 100); + ctx.lineTo(centerX, centerY + 100); + ctx.strokeStyle = "red"; + ctx.stroke(); + console.log("drawn center") + } + + function DrawBorder(){ + ctx.beginPath(); + ctx.moveTo(0,0); + ctx.lineTo(ctx.canvas.width, 0); + ctx.lineTo(ctx.canvas.width, ctx.canvas.height); + ctx.lineTo(0, ctx.canvas.height); + ctx.lineTo(0,0); + ctx.strokeStyle = "red"; + ctx.stroke(); + } \ No newline at end of file diff --git a/Catalogue/floral inverse animation.html b/Catalogue/floral inverse animation.html new file mode 100644 index 0000000..9b34d03 --- /dev/null +++ b/Catalogue/floral inverse animation.html @@ -0,0 +1,85 @@ +<!DOCTYPE html> +<html> +<!-- ahhh --> + +<body style="margin:0;overflow: hidden;"> + <canvas id="myCanvas" width="10" height="10" style="display: block;box-sizing: border-box;"> + Your browser does not support the HTML5 canvas tag.</canvas> + <script> + let c = document.getElementById("myCanvas"); + let ctx = c.getContext("2d"); + ctx.canvas.width = window.innerWidth; + ctx.canvas.height = window.innerHeight; + + let deg_per_sec = 30; + let time = 120; + let fps = 60; + + centerX = ctx.canvas.width / 2; + centerY = ctx.canvas.height / 2; + + rotation = 0; //was = j = angle + currentFrame = 0; //was = i + + + function render() { + if (currentFrame < time / (1 / fps)) { + setTimeout(() => { + render(); + render_clear(); + + Draw_Spiral_Pattern(6, 200, rotation, centerX, centerY, 'red') + + }, 1000 / fps); + rotation += deg_per_sec / fps; // was = j = angle, now = rotation + currentFrame += 1; // was = i + } + } + + render(); + + function Draw_Spiral_Pattern(sides, radius, rotation, x, y, colour) { + var rot = Math.round((sides - 2) * 180 / sides * 2) + var piv = 360 / sides; + var stt = 0.5 * Math.PI - rad(rot) //+ rad(rotation); + var end = 0; + var n = radius / ((radius / 10) * (radius / 10)) //pixel correction for mid leaf + + for (let i = 1; i < sides + 1; i++) { + end = stt + rad(rot); + + ctx.beginPath(); + ctx.arc(x + Math.cos(rad(90 + piv * i + rotation)) * radius, y + Math.sin(rad(90 + piv * i + rotation)) * radius, radius, stt + rad(rotation) - (stt - end) / 2, end + rad(rotation) + rad(n), 0); + ctx.strokeStyle = colour; + ctx.stroke(); + + + ctx.beginPath(); + ctx.arc(x + Math.cos(rad(90 + piv * i - rotation)) * radius, y + Math.sin(rad(90 + piv * i - rotation)) * radius, radius, stt - rad(rotation), end - (end - stt) / 2 + rad(n) - rad(rotation), 0); + ctx.strokeStyle = colour; + ctx.stroke(); + + + stt = end + -(rad(rot - piv)) //+rad(30); + } + + } + + + + function rad(degrees) { + var pi = Math.PI; + return degrees * (pi / 180); + } + + + function render_clear() { + ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height); + ctx.fillStyle = "black"; + ctx.fillRect(0, 0, ctx.canvas.width, ctx.canvas.height); + } + + </script> +</body> + +</html> \ No newline at end of file diff --git a/Catalogue/floral tri tip touch.html b/Catalogue/floral tri tip touch.html new file mode 100644 index 0000000..8785654 --- /dev/null +++ b/Catalogue/floral tri tip touch.html @@ -0,0 +1,80 @@ +<!DOCTYPE html> +<html> +<!-- ahhh --> + +<body style="margin:0;overflow: hidden;"> + <canvas id="myCanvas" width="10" height="10" + style="display: block;box-sizing: border-box;"> + Your browser does not support the HTML5 canvas tag.</canvas> + <script> + let c = document.getElementById("myCanvas"); + let ctx = c.getContext("2d"); + ctx.canvas.width = window.innerWidth; + ctx.canvas.height = window.innerHeight; + + let deg_per_sec = 30; + let time = 120; + let fps = 60; + + centerX = ctx.canvas.width / 2; + centerY = ctx.canvas.height / 2; + + rotation = 0; //was = j = angle + currentFrame = 0; //was = i + + + function render() { + if (currentFrame < time / (1 / fps)) { + setTimeout(() => { + render(); + render_clear(); + + draw_tri(rotation); + + }, 1000 / fps); + rotation += deg_per_sec / fps; // was = j = angle, now = rotation + currentFrame += 1; // was = i + } + } + + render(); + + function draw_tri(angle) { + draw_floral(3, 520, angle, centerX + 260, centerY - 150, "red"); + draw_floral(3, 520, angle + 60, centerX - 260, centerY - 150,"red"); + draw_floral(3, 520, angle + 120, centerX, centerY + 300, "red"); + } + + function draw_floral(sides, radius, rotation, x, y, colour) { + var rot = Math.round((sides - 2) * 180 / sides * 2) + var piv = 360 / sides; + var stt = 0.5 * Math.PI - rad(rot) + rad(rotation); + var end = 0; + + for (let i = 1; i < sides + 1; i++) { + end = stt + rad(rot); + ctx.beginPath(); + ctx.arc(x + Math.cos(rad(90 + piv * i + rotation)) * radius, y + Math.sin(rad(90 + piv * i + rotation)) * radius, radius, stt, end, 0); + ctx.strokeStyle = colour; + ctx.stroke(); + + stt = end + -(rad(rot - piv)) //+rad(30); + + } + } + + function rad(degrees) { + var pi = Math.PI; + return degrees * (pi / 180); + } + + function render_clear() { + ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height); + ctx.fillStyle = "black"; + ctx.fillRect(0, 0, ctx.canvas.width, ctx.canvas.height); + } + + </script> +</body> + +</html> \ No newline at end of file diff --git a/Catalogue/floral.html b/Catalogue/floral.html new file mode 100644 index 0000000..1983404 --- /dev/null +++ b/Catalogue/floral.html @@ -0,0 +1,75 @@ +<!DOCTYPE html> +<html> +<!-- ahhh --> + +<body style="margin:0;overflow: hidden;"> + <canvas id="myCanvas" width="10" height="10" style="display: block;box-sizing: border-box;"> + Your browser does not support the HTML5 canvas tag.</canvas> + <script> + let c = document.getElementById("myCanvas"); + let ctx = c.getContext("2d"); + ctx.canvas.width = window.innerWidth; + ctx.canvas.height = window.innerHeight; + + let deg_per_sec = 30; + let time = 120; + let fps = 60; + + centerX = ctx.canvas.width / 2; + centerY = ctx.canvas.height / 2; + + rotation = 0; //was = j = angle + currentFrame = 0; //was = i + + + function render() { + if (currentFrame < time / (1 / fps)) { + setTimeout(() => { + render(); + render_clear(); + + draw_floral(9, 200, rotation *0, centerX, centerY, "red"); + + + }, 1000 / fps); + rotation += deg_per_sec / fps; // was = j = angle, now = rotation + currentFrame += 1; // was = i + } + } + + render(); + + function draw_floral(sides, radius, rotation, x, y, colour) { + var rot = Math.round((sides - 2) * 180 / sides * 2) + var piv = 360 / sides; + var stt = 0.5 * Math.PI - rad(rot) + rad(rotation); + var end = 0; + + for (let i = 1; i < sides + 1; i++) { + end = stt + rad(rot); + ctx.beginPath(); + ctx.arc(x + Math.cos(rad(90 + piv * i + rotation)) * radius, y + Math.sin(rad(90 + piv * i + rotation)) * radius, radius, stt, end, 0); + ctx.strokeStyle = colour; + ctx.stroke(); + + stt = end + -(rad(rot - piv)) //+rad(30); + + } + } + + function rad(degrees) { + var pi = Math.PI; + return degrees * (pi / 180); + } + + + function render_clear() { + ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height); + ctx.fillStyle = "black"; + ctx.fillRect(0, 0, ctx.canvas.width, ctx.canvas.height); + } + + </script> +</body> + +</html> \ No newline at end of file diff --git a/Catalogue/foral accident.html b/Catalogue/foral accident.html new file mode 100644 index 0000000..2106ae7 --- /dev/null +++ b/Catalogue/foral accident.html @@ -0,0 +1,83 @@ +<!DOCTYPE html> +<html> +<!-- ahhh --> + +<body style="margin:0;overflow: hidden;"> + <canvas id="myCanvas" width="10" height="10" style="display: block;box-sizing: border-box;"> + Your browser does not support the HTML5 canvas tag.</canvas> + <script> + let c = document.getElementById("myCanvas"); + let ctx = c.getContext("2d"); + ctx.canvas.width = window.innerWidth; + ctx.canvas.height = window.innerHeight; + + let deg_per_sec = 30; + let time = 120; + let fps = 60; + + centerX = ctx.canvas.width / 2; + centerY = ctx.canvas.height / 2; + + rotation = 0; //was = j = angle + currentFrame = 0; //was = i + + + function render() { + if (currentFrame < time / (1 / fps)) { + setTimeout(() => { + render(); + render_clear(); + + Draw_Shape_accident(4,150,rotation,centerX,centerY,'red') + + }, 1000 / fps); + rotation += deg_per_sec / fps; // was = j = angle, now = rotation + currentFrame += 1; // was = i + } + } + + render(); + + function Draw_Shape_accident(sides, radius, rotation, x, y, colour) { + var rot = Math.round((sides - 2) * 180 / sides * 2) + var piv = 360 / sides; + var stt = 0.5 * Math.PI - rad(rot) //+ rad(rotation); + var end = 0; + var n = radius / ((radius / 10) * (radius / 10)) //pixel correction for mid leaf + + for (let i = 1; i < sides + 1; i++) { + end = stt + rad(rot); + + ctx.beginPath(); + ctx.arc(x + Math.cos(rad(90 + piv * i + rotation)) * radius, y + Math.sin(rad(90 + piv * i + rotation)) * radius, radius, stt - (stt - end + rad(rotation)) / 2, end + rad(n), 0); + ctx.strokeStyle = colour; + ctx.stroke(); + + + ctx.beginPath(); + ctx.arc(x + Math.cos(rad(90 + piv * i - rotation)) * radius, y + Math.sin(rad(90 + piv * i - rotation)) * radius, radius, stt, end - (end - stt - rad(rotation)) / 2 + rad(n), 0); + ctx.strokeStyle = colour; + ctx.stroke(); + + + stt = end + -(rad(rot - piv)) //+rad(30); + } + + } + + function rad(degrees) { + var pi = Math.PI; + return degrees * (pi / 180); + } + + + function render_clear() { + ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height); + ctx.fillStyle = "black"; + ctx.fillRect(0, 0, ctx.canvas.width, ctx.canvas.height); + } + + </script> +</body> + +</html> \ No newline at end of file diff --git a/Catalogue/nodal expanding.html b/Catalogue/nodal expanding.html new file mode 100644 index 0000000..15b763e --- /dev/null +++ b/Catalogue/nodal expanding.html @@ -0,0 +1,101 @@ +<!DOCTYPE html> +<html> +<!-- ahhh --> + +<body style="margin:0;overflow: hidden;"> + <canvas id="myCanvas" width="10" height="10" style="display: block;box-sizing: border-box;"> + Your browser does not support the HTML5 canvas tag.</canvas> + <script> + let c = document.getElementById("myCanvas"); + let ctx = c.getContext("2d"); + ctx.canvas.width = window.innerWidth; + ctx.canvas.height = window.innerHeight; + + + + let deg_per_sec = 30; + let time = 120; + let fps = 60; + + centerX = ctx.canvas.width / 2; + centerY = ctx.canvas.height / 2; + + rotation = 0; //was = j = angle + currentFrame = 0; //was = i + + + + function render() { + if (currentFrame < time / (1 / fps)) { + setTimeout(() => { + render(); + render_clear(); + + let colour1 = [137, 54, 255]; + let colour2 = [158, 255, 54]; + // Draw_nodal_expanding(5, 100000, rotation * 2 + 33000,0, colour1, colour2, 0.5, 2) + Draw_nodal_expanding(5, 10000, rotation+33000, 0, colour1, colour2, 1, 1) + + }, 1000 / fps); + rotation += deg_per_sec / fps; // was = j = angle, now = rotation + currentFrame += 1; // was = i + } + } + + render(); + + function Draw_nodal_expanding(expand, points, step, rotate, colour1, colour2, colour_change, line_width) { + var angle = 360 / points * step + + var start_angle = angle; + var done = false; + var total_moves = 1; + var length = expand; + + for (let z = 1; z <= 100; z++) { //why specifically 2500 + ctx.beginPath(); + ncolour = LerpRGB(colour1, colour2, Math.cos(rad(z * colour_change))); + + ctx.moveTo(centerX + (Math.cos(rad(angle * (z - 1) + rotate)) * (length - expand)), centerY + (Math.sin(rad(angle * (z - 1) + rotate)) * (length - expand))); + ctx.lineTo(centerX + (Math.cos(rad(angle * z + rotate)) * length), centerY + (Math.sin(rad(angle * z + rotate)) * length)); + length += expand; + ctx.lineWidth = line_width;//try 1 + ctx.strokeStyle = colourToText(ncolour); + ctx.stroke(); + } + + + } + + function LerpRGB(a, b, t) { + if (t < 0) { + t *= -1; + } + var newColor = [0, 0, 0]; + newColor[0] = a[0] + (b[0] - a[0]) * t; + newColor[1] = a[1] + (b[1] - a[1]) * t; + newColor[2] = a[2] + (b[2] - a[2]) * t; + return newColor; + } + + function colourToText(colour) { + return "rgb(" + colour[0] + "," + colour[1] + "," + colour[2] + ")" + } + + + function rad(degrees) { + var pi = Math.PI; + return degrees * (pi / 180); + } + + + function render_clear() { + ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height); + ctx.fillStyle = "black"; + ctx.fillRect(0, 0, ctx.canvas.width, ctx.canvas.height); + } + + </script> +</body> + +</html> \ No newline at end of file diff --git a/Catalogue/nodal.html b/Catalogue/nodal.html new file mode 100644 index 0000000..93d888a --- /dev/null +++ b/Catalogue/nodal.html @@ -0,0 +1,88 @@ +<!DOCTYPE html> +<html> +<!-- ahhh --> + +<body style="margin:0;overflow: hidden;"> + <canvas id="myCanvas" width="10" height="10" style="display: block;box-sizing: border-box;"> + Your browser does not support the HTML5 canvas tag.</canvas> + <script> + let c = document.getElementById("myCanvas"); + let ctx = c.getContext("2d"); + ctx.canvas.width = window.innerWidth; + ctx.canvas.height = window.innerHeight; + + + + let deg_per_sec = 15; + let time = 120; + let fps = 60; + + centerX = ctx.canvas.width / 2; + centerY = ctx.canvas.height / 2; + + rotation = 0; //was = j = angle + currentFrame = 0; //was = i + + + + function render() { + if (currentFrame < time / (1 / fps)) { + setTimeout(() => { + render(); + render_clear(); + + Draw_nodal(300, 100, 31, rotation, "blue"); + + + // Draw_center(); //Debugging + // DrawBorder(); + }, 1000 / fps); + rotation += deg_per_sec / fps; // was = j = angle, now = rotation + currentFrame += 1; // was = i + } + } + + render(); + + function Draw_nodal(radius, points, step, rotate, colour) { + var angle = 360 / points * step + ctx.beginPath(); + var start_angle = angle; + var done = false; + var total_moves = 1; + ctx.moveTo(centerX + (Math.cos(rad(angle + rotate)) * radius), centerY + (Math.sin(rad(angle + rotate)) * radius)); + + while (done != true) { + if ((total_moves * step) % points != 0) { + total_moves++ + } + else { + total_moves++ + done = true + } + } + for (let z = 1; z <= total_moves; z++) { + ctx.lineTo(centerX + (Math.cos(rad(angle * z + rotate)) * radius), centerY + (Math.sin(rad(angle * z + rotate)) * radius)); + } + ctx.strokeStyle = colour; + ctx.stroke(); + + } + + function rad(degrees) { + var pi = Math.PI; + return degrees * (pi / 180); + } + + function render_clear() { + ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height); + ctx.fillStyle = "black"; + ctx.fillRect(0, 0, ctx.canvas.width, ctx.canvas.height); + } + + + + </script> +</body> + +</html> \ No newline at end of file diff --git a/Catalogue/phyllotaxis.html b/Catalogue/phyllotaxis.html new file mode 100644 index 0000000..7e78cd3 --- /dev/null +++ b/Catalogue/phyllotaxis.html @@ -0,0 +1,98 @@ +<!DOCTYPE html> +<html> +<!-- ahhh --> + +<body style="margin:0;overflow: hidden;"> + <canvas id="myCanvas" width="10" height="10" style="display: block;box-sizing: border-box;"> + Your browser does not support the HTML5 canvas tag.</canvas> + <script> + let c = document.getElementById("myCanvas"); + let ctx = c.getContext("2d"); + ctx.canvas.width = window.innerWidth; + ctx.canvas.height = window.innerHeight; + + + + let deg_per_sec = 30; + let time = 120; + let fps = 60; + + centerX = ctx.canvas.width / 2; + centerY = ctx.canvas.height / 2; + + rotation = 0; //was = j = angle + currentFrame = 0; //was = i + + + + function render() { + if (currentFrame < time / (1 / fps)) { + setTimeout(() => { + render(); + render_clear(); + + Draw_Phyllotaxis(rotation / 5000 + 1); + // Draw_Phyllotaxis(rotation/5000); + + // Draw_center(); //Debugging + // DrawBorder(); + }, 1000 / fps); + rotation += deg_per_sec / fps; // was = j = angle, now = rotation + currentFrame += 1; // was = i + } + } + + render(); + + function Draw_Phyllotaxis(angle) { + colour1 = [255, 170, 0]; + colour2 = [255, 0, 221]; + + var c = 24; //something to do with width. but not width + + for (let n = 0; n < 300; n += 1) { + ncolour = LerpRGB(colour1, colour2, Math.cos(rad(n / 2))); + var a = n * (angle)//137.5; + var r = c * Math.sqrt(n); + var x = r * Math.cos(a) + centerX; + var y = r * Math.sin(a) + centerY; + + ctx.beginPath(); + ctx.arc(x, y, 4, 0, 2 * Math.PI); + ctx.fillStyle = colourToText(ncolour); + ctx.fill(); + + } + + + } + function rad(degrees) { + var pi = Math.PI; + return degrees * (pi / 180); + } + + function LerpRGB(a, b, t) { + if (t < 0) { + t *= -1; + } + var newColor = [0, 0, 0]; + newColor[0] = a[0] + (b[0] - a[0]) * t; + newColor[1] = a[1] + (b[1] - a[1]) * t; + newColor[2] = a[2] + (b[2] - a[2]) * t; + return newColor; + } + + function colourToText(colour) { + return "rgb(" + colour[0] + "," + colour[1] + "," + colour[2] + ")" + } + + function render_clear() { + ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height); + ctx.fillStyle = "black"; + ctx.fillRect(0, 0, ctx.canvas.width, ctx.canvas.height); + } + + </script> +</body> + +</html> \ No newline at end of file diff --git a/Catalogue/rectangle pattern 1.html b/Catalogue/rectangle pattern 1.html new file mode 100644 index 0000000..01cc751 --- /dev/null +++ b/Catalogue/rectangle pattern 1.html @@ -0,0 +1,86 @@ +<!DOCTYPE html> +<html> +<!-- ahhh --> + +<body style="margin:0;overflow: hidden;"> + <canvas id="myCanvas" width="10" height="10" style="display: block;box-sizing: border-box;"> + Your browser does not support the HTML5 canvas tag.</canvas> + <script> + let c = document.getElementById("myCanvas"); + let ctx = c.getContext("2d"); + ctx.canvas.width = window.innerWidth; + ctx.canvas.height = window.innerHeight; + + + + let deg_per_sec = 30; + let time = 120; + let fps = 60; + + centerX = ctx.canvas.width / 2; + centerY = ctx.canvas.height / 2; + + rotation = 0; //was = j = angle + currentFrame = 0; //was = i + + + let squares = 1; + let tmpTimer = 0; + render_clear(); + function render() { + if (currentFrame < time / (1 / fps)) { + setTimeout(() => { + render(); + render_clear(); + + Draw_rectangle_pattern1(rotation, squares, 200, "blue"); + + if (tmpTimer >= fps/2 & squares != 40) { + tmpTimer = 0; + squares += 1; + } + tmpTimer += 1; + + }, 1000 / fps); + rotation += deg_per_sec / fps; // was = j = angle, now = rotation + currentFrame += 1; // was = i + } + } + + render(); + + + function Draw_rectangle_pattern1(rotation, squares, size, colour) { + for (let z = 0; z < 360; z += 360 / squares) { + drawSquare(z + rotation); + } + + function drawSquare(angle) { + ctx.save(); + ctx.translate(centerX, centerY)//-(Math.sin(rad(angle)) *centerX)); + ctx.rotate(rad(angle + 180)); + ctx.beginPath(); + ctx.strokeStyle = colour; + ctx.rect(-size, -size, size, size); + ctx.stroke(); + ctx.restore(); + } + } + + function rad(degrees) { + var pi = Math.PI; + return degrees * (pi / 180); + } + + + function render_clear() { + ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height); + ctx.fillStyle = "black"; + ctx.fillRect(0, 0, ctx.canvas.width, ctx.canvas.height); + } + + + </script> +</body> + +</html> \ No newline at end of file diff --git a/Catalogue/template.html b/Catalogue/template.html index e91558d..fc17f45 100644 --- a/Catalogue/template.html +++ b/Catalogue/template.html @@ -1,44 +1,51 @@ <!DOCTYPE html> <html> - <!-- ahhh --> - <body> - <canvas - id="myCanvas" - width="1920" - height="1080" - style="border: 1px solid #d3d3d3" - > - Your browser does not support the HTML5 canvas tag.</canvas - > - <script> - let c = document.getElementById("myCanvas"); - let ctx = c.getContext("2d"); +<!-- ahhh --> + +<body style="margin:0;overflow: hidden;"> + <canvas id="myCanvas" width="10" height="10" + style="display: block;box-sizing: border-box;"> + Your browser does not support the HTML5 canvas tag.</canvas> + <script> + let c = document.getElementById("myCanvas"); + let ctx = c.getContext("2d"); + ctx.canvas.width = window.innerWidth; + ctx.canvas.height = window.innerHeight; + + let deg_per_sec = 30; + let time = 120; + let fps = 60; + + centerX = ctx.canvas.width / 2; + centerY = ctx.canvas.height / 2; + + rotation = 0; //was = j = angle + currentFrame = 0; //was = i - let deg_per_sec = 30; - let time = 120; - let fps = 60; - - centerX = 1920 / 2; - centerY = 1080 / 2; - - j = 0; - i = 0; + function render() { + if (currentFrame < time / (1 / fps)) { + setTimeout(() => { + render(); + render_clear(); - function render() { - if (i < time / (1 / fps)) { - setTimeout(() => { - render(); - - render_clear(); - }, 1000 / fps); - j += (deg_per_sec * 1) / fps; //What is this? - i += 1; - } + }, 1000 / fps); + rotation += deg_per_sec / fps; // was = j = angle, now = rotation + currentFrame += 1; // was = i } + } - render(); - </script> - </body> -</html> + render(); + + + function render_clear() { + ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height); + ctx.fillStyle = "black"; + ctx.fillRect(0, 0, ctx.canvas.width, ctx.canvas.height); + } + + </script> +</body> + +</html> \ No newline at end of file diff --git a/Catalogue/triangle.html b/Catalogue/triangle.html new file mode 100644 index 0000000..6cf38ef --- /dev/null +++ b/Catalogue/triangle.html @@ -0,0 +1,66 @@ +<!DOCTYPE html> +<html> +<!-- ahhh --> + +<body style="margin:0;overflow: hidden;"> + <canvas id="myCanvas" width="10" height="10" style="display: block;box-sizing: border-box;"> + Your browser does not support the HTML5 canvas tag.</canvas> + <script> + let c = document.getElementById("myCanvas"); + let ctx = c.getContext("2d"); + ctx.canvas.width = window.innerWidth; + ctx.canvas.height = window.innerHeight; + + let deg_per_sec = 30; + let time = 120; + let fps = 60; + + centerX = ctx.canvas.width / 2; + centerY = ctx.canvas.height / 2; + + rotation = 0; //was = j = angle + currentFrame = 0; //was = i + + + function render() { + if (currentFrame < time / (1 / fps)) { + setTimeout(() => { + render(); + render_clear(); + + draw_triangle(0, 200) + + }, 1000 / fps); + rotation += deg_per_sec / fps; // was = j = angle, now = rotation + currentFrame += 1; // was = i + } + } + + render(); + + function draw_triangle(ang, radius) { + ctx.beginPath(); + ctx.moveTo(centerX + Math.cos(rad(90 + 120 * 1 + ang)) * radius, centerY + Math.sin(rad(90 + 120 * 1 + ang)) * radius); + ctx.lineTo(centerX + Math.cos(rad(90 + 120 * 2 + ang)) * radius, centerY + Math.sin(rad(90 + 120 * 2 + ang)) * radius); + ctx.lineTo(centerX + Math.cos(rad(90 + 120 * 3 + ang)) * radius, centerY + Math.sin(rad(90 + 120 * 3 + ang)) * radius); + ctx.lineTo(centerX + Math.cos(rad(90 + 120 * 1 + ang)) * radius, centerY + Math.sin(rad(90 + 120 * 1 + ang)) * radius); + ctx.strokeStyle = "red"; + ctx.stroke(); + } + + function rad(degrees) { + var pi = Math.PI; + return degrees * (pi / 180); + } + + + function render_clear() { + ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height); + ctx.fillStyle = "black"; + ctx.fillRect(0, 0, ctx.canvas.width, ctx.canvas.height); + } + + </script> +</body> + +</html> \ No newline at end of file diff --git a/Python/ShapesStuff/nodal_pattern - Copy.py b/Python/ShapesStuff/nodal_pattern - Copy.py new file mode 100644 index 0000000..9e21130 --- /dev/null +++ b/Python/ShapesStuff/nodal_pattern - Copy.py @@ -0,0 +1,136 @@ +from turtle import * +r = 1 +g = 0 +b = 0 +tup = (r,g,b) +pencolor(tup) +change_amount = 0.1 +changing_color = "r+" + +#begin_fill() +pendown() + + + +def step_color_rainbow(): + + global changing_color + global change_amount + global r + global g + global b + if(changing_color == "r+"): + r += change_amount + if(r>1): + r = 1 + changing_color = "b-" + elif(changing_color == "g+"): + g += change_amount + if(g>1): + g = 1 + changing_color = "r-" + elif(changing_color == "b+"): + b += change_amount + if(b>1): + b = 1 + changing_color = "g-" + if(changing_color == "r-"): + r -= change_amount + if(r<0): + r = 0 + changing_color = "b+" + elif(changing_color == "g-"): + g -= change_amount + if(g<0): + g = 0 + changing_color = "r+" + elif(changing_color == "b-"): + b -= change_amount + if(b<0): + b = 0 + changing_color = "g+" + + + + + + + + +def step_color_two(): + global r + global g + global b + global changing_color + + r1 = 0.07 + g1 = 0.02 + b1 = 0.35 + + r2 = 1 + g2 = 0.07 + b2 = 0.31 + + + c_amount = 100 + + rdiff = r2-r1 + gdiff = g2 - g1 + bdiff = b2 - b1 + + rchange = rdiff/c_amount + gchange = gdiff/c_amount + bchange = bdiff/c_amount + #print(f"{rchange} {gchange} {bchange}") + #print(f" {r} {g} {b}") + if(changing_color == "r+"): + r += rchange + g += gchange + b += bchange + else: + r -= rchange + g -= gchange + b -= bchange + + if(r >= r2): + r = r2 + g = g2 + b = b2 + changing_color = "r-" + elif(r <= r1): + r = r1 + g = g1 + b = b1 + changing_color = "r+" + +nodes = 999 +step = 330 +node_angle = 360/nodes +speed(0) +bgcolor("black") +def iterations(n,s): + i = 1 + while True: + x = s*i + if(x % n== 0) and (x>= n): + return i + else: + i += 1 + +#print(iterations(nodes,step)) +distance = 1 +flip = 1 +while True: + forward(distance * flip) + #flip *= -1 + right(step*node_angle) + #node_angle *= 1.0001 + if abs(pos()) < 1: + break + + #step_color_two() + #step_color_rainbow() + #print(f"{r} {g} {b}") + pencolor((r,g,b)) + distance +=1 +done() \ No newline at end of file diff --git a/Python/ShapesStuff/nodal_pattern-DESKTOP-QKEHV8K.py b/Python/ShapesStuff/nodal_pattern-DESKTOP-QKEHV8K.py new file mode 100644 index 0000000..88944de --- /dev/null +++ b/Python/ShapesStuff/nodal_pattern-DESKTOP-QKEHV8K.py @@ -0,0 +1,133 @@ +from turtle import * +r = 1 +g = 0 +b = 0 +tup = (r,g,b) +pencolor(tup) +change_amount = 0.1 +changing_color = "r+" + +#begin_fill() +pendown() + + + +def step_color_rainbow(): + + global changing_color + global change_amount + global r + global g + global b + if(changing_color == "r+"): + r += change_amount + if(r>1): + r = 1 + changing_color = "b-" + elif(changing_color == "g+"): + g += change_amount + if(g>1): + g = 1 + changing_color = "r-" + elif(changing_color == "b+"): + b += change_amount + if(b>1): + b = 1 + changing_color = "g-" + if(changing_color == "r-"): + r -= change_amount + if(r<0): + r = 0 + changing_color = "b+" + elif(changing_color == "g-"): + g -= change_amount + if(g<0): + g = 0 + changing_color = "r+" + elif(changing_color == "b-"): + b -= change_amount + if(b<0): + b = 0 + changing_color = "g+" + + + + + + + + +def step_color_two(): + global r + global g + global b + global changing_color + + r1 = 0.07 + g1 = 0.02 + b1 = 0.35 + + r2 = 1 + g2 = 0.07 + b2 = 0.31 + + + c_amount = 100 + + rdiff = r2-r1 + gdiff = g2 - g1 + bdiff = b2 - b1 + + rchange = rdiff/c_amount + gchange = gdiff/c_amount + bchange = bdiff/c_amount + #print(f"{rchange} {gchange} {bchange}") + #print(f" {r} {g} {b}") + if(changing_color == "r+"): + r += rchange + g += gchange + b += bchange + else: + r -= rchange + g -= gchange + b -= bchange + + if(r >= r2): + r = r2 + g = g2 + b = b2 + changing_color = "r-" + elif(r <= r1): + r = r1 + g = g1 + b = b1 + changing_color = "r+" + +nodes = 999 +step = 247 +node_angle = 360/nodes +speed(0) +bgcolor("black") +def iterations(n,s): + i = 1 + while True: + x = s*i + if(x % n== 0) and (x>= n): + return i + else: + i += 1 + +#print(iterations(nodes,step)) +distance = 1 +while True: + forward(distance) + right(step*node_angle) + if abs(pos()) < 1: + break + + step_color_two() + #step_color_rainbow() + #print(f"{r} {g} {b}") + pencolor((r,g,b)) + distance +=2 +done() \ No newline at end of file diff --git a/Python/ShapesStuff/nodal_pattern.py b/Python/ShapesStuff/nodal_pattern.py new file mode 100644 index 0000000..4380b23 --- /dev/null +++ b/Python/ShapesStuff/nodal_pattern.py @@ -0,0 +1,134 @@ +from turtle import * +r = 1 +g = 0 +b = 0 +tup = (r,g,b) +pencolor(tup) +change_amount = 0.1 +changing_color = "r+" + +#begin_fill() +pendown() + + + +def step_color_rainbow(): + + global changing_color + global change_amount + global r + global g + global b + if(changing_color == "r+"): + r += change_amount + if(r>1): + r = 1 + changing_color = "b-" + elif(changing_color == "g+"): + g += change_amount + if(g>1): + g = 1 + changing_color = "r-" + elif(changing_color == "b+"): + b += change_amount + if(b>1): + b = 1 + changing_color = "g-" + if(changing_color == "r-"): + r -= change_amount + if(r<0): + r = 0 + changing_color = "b+" + elif(changing_color == "g-"): + g -= change_amount + if(g<0): + g = 0 + changing_color = "r+" + elif(changing_color == "b-"): + b -= change_amount + if(b<0): + b = 0 + changing_color = "g+" + + + + + + + + +def step_color_two(): + global r + global g + global b + global changing_color + + r1 = 0.07 + g1 = 0.02 + b1 = 0.35 + + r2 = 1 + g2 = 0.07 + b2 = 0.31 + + + c_amount = 100 + + rdiff = r2-r1 + gdiff = g2 - g1 + bdiff = b2 - b1 + + rchange = rdiff/c_amount + gchange = gdiff/c_amount + bchange = bdiff/c_amount + #print(f"{rchange} {gchange} {bchange}") + #print(f" {r} {g} {b}") + if(changing_color == "r+"): + r += rchange + g += gchange + b += bchange + else: + r -= rchange + g -= gchange + b -= bchange + + if(r >= r2): + r = r2 + g = g2 + b = b2 + changing_color = "r-" + elif(r <= r1): + r = r1 + g = g1 + b = b1 + changing_color = "r+" + +nodes = 999 +step = 330 +node_angle = 360/nodes +speed(0) +bgcolor("black") +def iterations(n,s): + i = 1 + while True: + x = s*i + if(x % n== 0) and (x>= n): + return i + else: + i += 1 + +#print(iterations(nodes,step)) +distance = 1 +speed = 0 +while True: + forward(distance) + right(step*node_angle) + if abs(pos()) < 1: + break + + step_color_two() + #step_color_rainbow() + #print(f"{r} {g} {b}") + pencolor((r,g,b)) + distance +=1 +done() \ No newline at end of file diff --git a/animate 0.1 (deconstructing)/animation.html b/animate 0.1 (deconstructing)/animation.html index 7291ef2..a528c6a 100644 --- a/animate 0.1 (deconstructing)/animation.html +++ b/animate 0.1 (deconstructing)/animation.html @@ -28,23 +28,6 @@ return newColor; } - function draw_shape(sides, radius, rotation, x, y, colour) { - var rot = Math.round((sides - 2) * 180 / sides * 2) - var piv = 360 / sides; - var stt = 0.5 * Math.PI - rad(rot) + rad(rotation); - var end = 0; - - for (let i = 1; i < sides + 1; i++) { - end = stt + rad(rot); - ctx.beginPath(); - ctx.arc(x + Math.cos(rad(90 + piv * i + rotation)) * radius, y + Math.sin(rad(90 + piv * i + rotation)) * radius, radius, stt, end, 0); - ctx.strokeStyle = colour; - ctx.stroke(); - - stt = end + -(rad(rot - piv)) //+rad(30); - - } - } function draw_shape_sub(sides, radius, rotation, x, y, colour) { var denominator = sides - 2 @@ -97,85 +80,7 @@ } } - function Draw_Shape_accident(sides, radius, rotation, x, y, colour) { - var rot = Math.round((sides - 2) * 180 / sides * 2) - var piv = 360 / sides; - var stt = 0.5 * Math.PI - rad(rot) //+ rad(rotation); - var end = 0; - var n = radius / ((radius / 10) * (radius / 10)) //pixel correction for mid leaf - - for (let i = 1; i < sides + 1; i++) { - end = stt + rad(rot); - - ctx.beginPath(); - ctx.arc(x + Math.cos(rad(90 + piv * i + rotation)) * radius, y + Math.sin(rad(90 + piv * i + rotation)) * radius, radius, stt - (stt - end + rad(rotation)) / 2, end + rad(n), 0); - ctx.strokeStyle = colour; - ctx.stroke(); - - - ctx.beginPath(); - ctx.arc(x + Math.cos(rad(90 + piv * i - rotation)) * radius, y + Math.sin(rad(90 + piv * i - rotation)) * radius, radius, stt, end - (end - stt - rad(rotation)) / 2 + rad(n), 0); - ctx.strokeStyle = colour; - ctx.stroke(); - - - stt = end + -(rad(rot - piv)) //+rad(30); - } - - } - - function Draw_Spiral_Pattern(sides, radius, rotation, x, y, colour) { - var rot = Math.round((sides - 2) * 180 / sides * 2) - var piv = 360 / sides; - var stt = 0.5 * Math.PI - rad(rot) //+ rad(rotation); - var end = 0; - var n = radius / ((radius / 10) * (radius / 10)) //pixel correction for mid leaf - - for (let i = 1; i < sides + 1; i++) { - end = stt + rad(rot); - - ctx.beginPath(); - ctx.arc(x + Math.cos(rad(90 + piv * i + rotation)) * radius, y + Math.sin(rad(90 + piv * i + rotation)) * radius, radius, stt + rad(rotation) - (stt - end) / 2, end + rad(rotation) + rad(n), 0); - ctx.strokeStyle = colour; - ctx.stroke(); - - - ctx.beginPath(); - ctx.arc(x + Math.cos(rad(90 + piv * i - rotation)) * radius, y + Math.sin(rad(90 + piv * i - rotation)) * radius, radius, stt - rad(rotation), end - (end - stt) / 2 + rad(n) - rad(rotation), 0); - ctx.strokeStyle = colour; - ctx.stroke(); - - - stt = end + -(rad(rot - piv)) //+rad(30); - } - - } - - function Draw_Spiral(sides, radius, rotation, x, y, colour) { - var rot = Math.round((sides - 2) * 180 / sides * 2) - var piv = 360 / sides; - var stt = 0.5 * Math.PI - rad(rot) + rad(rotation); - var end = 0; - var n = radius / ((radius / 10) * (radius / 10)) //pixel correction for mid leaf - - for (let i = 1; i < sides + 1; i++) { - end = stt + rad(rot); - ctx.beginPath(); - ctx.arc(x + Math.cos(rad(90 + piv * i + rotation)) * radius, y + Math.sin(rad(90 + piv * i + rotation)) * radius, radius, stt - (stt - end) / 2, end + rad(n), 0); - ctx.strokeStyle = colour; - ctx.stroke(); - - /* - ctx.beginPath(); - ctx.arc(x + Math.cos(rad(90 + piv * i + rotation)) * radius, y + Math.sin(rad(90 + piv * i + rotation)) * radius, radius, stt, end - (end - stt) / 2 + rad(n), 0); - ctx.fillStyle = colour; - ctx.fill(); - */ - - stt = end + -(rad(rot - piv)) //+rad(30); - } - - } + function render_clear() { ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height); @@ -186,10 +91,10 @@ function draw_triangle(ang, radius) { ctx.beginPath(); - ctx.moveTo(startx + Math.cos(rad(90 + 120 * 1 + ang)) * radius, starty + Math.sin(rad(90 + 120 * 1 + ang)) * radius); - ctx.lineTo(startx + Math.cos(rad(90 + 120 * 2 + ang)) * radius, starty + Math.sin(rad(90 + 120 * 2 + ang)) * radius); - ctx.lineTo(startx + Math.cos(rad(90 + 120 * 3 + ang)) * radius, starty + Math.sin(rad(90 + 120 * 3 + ang)) * radius); - ctx.lineTo(startx + Math.cos(rad(90 + 120 * 1 + ang)) * radius, starty + Math.sin(rad(90 + 120 * 1 + ang)) * radius); + ctx.moveTo(centerX + Math.cos(rad(90 + 120 * 1 + ang)) * radius, centerY + Math.sin(rad(90 + 120 * 1 + ang)) * radius); + ctx.lineTo(centerX + Math.cos(rad(90 + 120 * 2 + ang)) * radius, centerY + Math.sin(rad(90 + 120 * 2 + ang)) * radius); + ctx.lineTo(centerX + Math.cos(rad(90 + 120 * 3 + ang)) * radius, centerY + Math.sin(rad(90 + 120 * 3 + ang)) * radius); + ctx.lineTo(centerX + Math.cos(rad(90 + 120 * 1 + ang)) * radius, centerY + Math.sin(rad(90 + 120 * 1 + ang)) * radius); ctx.strokeStyle = "red"; ctx.stroke(); } @@ -208,8 +113,8 @@ var piv = 360 / sides_org; var angle = 0; - startx = 1920 / 2//1875/2; - starty = 1080 / 2//950/2;//-(Math.tan(30*Math.PI/180)*width/2); + centerX = 1920 / 2//1875/2; + centerY = 1080 / 2//950/2;//-(Math.tan(30*Math.PI/180)*width/2); j = 0; i = 0; @@ -322,35 +227,35 @@ //draw_triangle(180+ (theFinalAngle*180/Math.PI) ,L) //draw_triangle((angle-180)/2.8,tmpA*400) - //draw_shape(7,300,0,startx,starty,"red"); - //draw_shape_sub(7,300,0,startx,starty,"blue"); - //draw_shape_fill(5,300,angle,startx,starty,"purple"); + //draw_shape(7,300,0,centerX,centerY,"red"); + //draw_shape_sub(7,300,0,centerX,centerY,"blue"); + //draw_shape_fill(5,300,angle,centerX,centerY,"purple"); /* - draw_shape_fill(5,300,angle,startx,starty,"purple"); - draw_shape_fill(5,115,-(angle+108),startx,starty,"red"); - draw_shape_fill(5,44,angle+108,startx,starty,"yellow"); + draw_shape_fill(5,300,angle,centerX,centerY,"purple"); + draw_shape_fill(5,115,-(angle+108),centerX,centerY,"red"); + draw_shape_fill(5,44,angle+108,centerX,centerY,"yellow"); - draw_shape(5,300,angle,startx,starty,"red"); - draw_shape(5,115,-(angle+108),startx,starty,"yellow"); - draw_shape(5,44,angle+108,startx,starty,"purple"); + draw_shape(5,300,angle,centerX,centerY,"red"); + draw_shape(5,115,-(angle+108),centerX,centerY,"yellow"); + draw_shape(5,44,angle+108,centerX,centerY,"purple"); */ - //Draw_Spiral(4,400,0,startx,starty,'red'); - //Draw_Spiral_Pattern(50, 250, angle, startx, starty, 'red') - //Draw_Shape_accident(4,300,angle,startx,starty,'red') - //Draw_Spiral(10,400,-angle,startx,starty,'red'); + //Draw_Spiral(4,400,0,centerX,centerY,'red'); + //Draw_Spiral_Pattern(50, 250, angle, centerX, centerY, 'red') + //Draw_Shape_accident(4,300,angle,centerX,centerY,'red') + //Draw_Spiral(10,400,-angle,centerX,centerY,'red'); - //draw_shape(99,300,angle,startx,starty,"red"); + //draw_shape(99,300,angle,centerX,centerY,"red"); //draw_triangle(0); //draw_tri(angle); //draw_test_fill(angle); - //draw_shape(5,300,angle,startx,starty); - //draw_shape(3,300,-angle,startx,starty) + //draw_shape(5,300,angle,centerX,centerY); + //draw_shape(3,300,-angle,centerX,centerY) - //draw_shape(7,400,angle,startx,starty) - //draw_shape(6,r,-angle,startx,starty) + //draw_shape(7,400,angle,centerX,centerY) + //draw_shape(6,r,-angle,centerX,centerY) /* @@ -364,17 +269,11 @@ //Draw_nodal_expanding(2.5,100000,angle*2+33000,angle*0, colour1,colour2,0.5, 5) //Draw_nodal_expanding(2.5,10000,angle,angle*0, colour1,colour2,0.5, 1) //console.log(angle*2) - //draw_shape(55,300,angle,startx,starty,"pink") + //draw_shape(55,300,angle,centerX,centerY,"pink") //Draw_Phyllotaxis(angle/5000+1); - //draw_shape_fill(4,400,angle,startx,starty,colourToText(ncolour)); + //draw_shape_fill(4,400,angle,centerX,centerY,colourToText(ncolour)); - //Draw_rectangle_pattern1(angle, 180, "purple"); - /* - for (let z = 0; z < 360; z+=360/45) { - Draw_rectangle_pattern1(z+angle,200,"blue"); - - } - */ + @@ -394,76 +293,23 @@ render() //render_clear() //Draw_nodal(500, 100,33) - //draw_shape_fill(5,300,angle,startx,starty,"purple"); - //draw_shape_fill(5,115,angle+108,startx,starty,"red"); - //draw_shape(5,300,angle,startx,starty); + //draw_shape_fill(5,300,angle,centerX,centerY,"purple"); + //draw_shape_fill(5,115,angle+108,centerX,centerY,"red"); + //draw_shape(5,300,angle,centerX,centerY); //Draw_center(); - function Draw_Phyllotaxis(angle) { - colour1 = [255, 170, 0]; - colour2 = [255, 0, 221]; - - var c = 32; - - for (let n = 50; n < 300; n += 1) { - ncolour = LerpRGB(colour1, colour2, Math.cos(rad(n / 2))); - var a = n * (angle)//137.5; - var r = c * Math.sqrt(n); - var x = r * Math.cos(a) + startx; - var y = r * Math.sin(a) + starty; - - ctx.beginPath(); - ctx.arc(x, y, 4, 0, 2 * Math.PI); - ctx.fillStyle = colourToText(ncolour); - ctx.fill(); - - } + - } - function draw_test_fill(angle) { - - ctx.beginPath(); - ctx.arc(1000, 500, 300, 0, rad(angle)); - ctx.fillStyle = "purple"; - ctx.fill(); - - } - - function Draw_nodal_expanding(expand, points, step, rotate, colour1, colour2, colour_change, line_width) { - var angle = 360 / points * step - - var start_angle = angle; - var done = false; - var total_moves = 1; - var length = expand; - - - for (let z = 1; z <= 2500; z++) { - ctx.beginPath(); - //ctx.moveTo(startx, starty); - ncolour = LerpRGB(colour1, colour2, Math.cos(rad(z * colour_change))); - - ctx.moveTo(startx + (Math.cos(rad(angle * (z - 1) + rotate)) * (length - expand)), starty + (Math.sin(rad(angle * (z - 1) + rotate)) * (length - expand))); - ctx.lineTo(startx + (Math.cos(rad(angle * z + rotate)) * length), starty + (Math.sin(rad(angle * z + rotate)) * length)); - length += expand; - ctx.lineWidth = line_width;//try 1 - ctx.strokeStyle = colourToText(ncolour); - ctx.stroke(); - } - - - } - - function Draw_nodal(radius, points, step, rotate, colour) { + function Draw_nodal(radius, points, step, rotate, colour) { //catalogued var angle = 360 / points * step ctx.beginPath(); var start_angle = angle; var done = false; var total_moves = 1; - ctx.moveTo(startx + (Math.cos(rad(angle + rotate)) * radius), starty + (Math.sin(rad(angle + rotate)) * radius)); + ctx.moveTo(centerX + (Math.cos(rad(angle + rotate)) * radius), centerY + (Math.sin(rad(angle + rotate)) * radius)); while (done != true) { if ((total_moves * step) % points != 0) { @@ -475,16 +321,16 @@ } } for (let z = 1; z <= total_moves; z++) { - ctx.lineTo(startx + (Math.cos(rad(angle * z + rotate)) * radius), starty + (Math.sin(rad(angle * z + rotate)) * radius)); + ctx.lineTo(centerX + (Math.cos(rad(angle * z + rotate)) * radius), centerY + (Math.sin(rad(angle * z + rotate)) * radius)); } ctx.strokeStyle = colour; ctx.stroke(); } - function Draw_rectangle_pattern1(angle, size, colour) { + function Draw_rectangle_pattern1(angle, size, colour) { //catalogued ctx.save(); - ctx.translate(startx, starty)//-(Math.sin(rad(angle)) *startx)); + ctx.translate(centerX, centerY)//-(Math.sin(rad(angle)) *centerX)); ctx.rotate(rad(angle + 180)); ctx.beginPath(); ctx.strokeStyle = colour; @@ -494,19 +340,13 @@ } - function draw_tri(angle) { - draw_shape(3, 520, angle, startx + 260, starty - 150); - draw_shape(3, 520, angle + 60, startx - 260, starty - 150); - draw_shape(3, 520, angle + 120, startx, starty + 300); - - } function Draw_center() { ctx.beginPath(); - ctx.moveTo(startx - 100, starty); - ctx.lineTo(startx + 100, starty); - ctx.moveTo(startx, starty - 100); - ctx.lineTo(startx, starty + 100); + ctx.moveTo(centerX - 100, centerY); + ctx.lineTo(centerX + 100, centerY); + ctx.moveTo(centerX, centerY - 100); + ctx.lineTo(centerX, centerY + 100); ctx.strokeStyle = "red"; ctx.stroke();