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https://git.sleeping.town/mirrors/foxy-moxy
synced 2024-11-21 11:37:43 +00:00
Extract the renderer to it's own file.
This commit is contained in:
lucaswadedavis
parent
d3ae3f8295
commit
049cb0765e
2 changed files with 136 additions and 165 deletions
134
js/render-fox.js
Normal file
134
js/render-fox.js
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@ -0,0 +1,134 @@
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var renderFox = function (canvas, opts) {
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var width = opts.canvas.width;
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var height = opts.canvas.height;
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var ctx = canvas.getContext('2d');
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ctx.fillStyle = opts.canvas.color;
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ctx.fillRect(0, 0, width, height);
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renderEars(ctx, opts.ears);
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renderHead(ctx, opts.head);
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renderEyes(ctx, opts.eyes);
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renderNose(ctx, opts.nose);
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renderMouth(ctx, opts.mouth);
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};
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function renderHead(ctx, opts) {
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ctx.save();
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ctx.translate(ctx.canvas.width/2, ctx.canvas.height/2);
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ctx.rotate(Math.PI / 4);
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drawEllipseByCenter(ctx, 0, 0, opts.width, opts.height, opts.color, null, opts.kappa);
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ctx.restore();
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ctx.clip();
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drawEllipseByCenter(ctx, ctx.canvas.width / 2, ctx.canvas.height, opts.maskWidth, opts.maskHeight, '#fff', '#fff', 0.5);
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}
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function renderEars(ctx, opts) {
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var offset = {
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x: ctx.canvas.width/2,
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y: ctx.canvas.height/2
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}
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ctx.save();
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ctx.translate(offset.x, offset.y);
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ctx.rotate(-opts.left.angle);
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drawEllipseByCenter(ctx, opts.left.x - offset.x, opts.left.y - offset.y, opts.left.width, opts.left.height, opts.color, null, opts.kappa);
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ctx.restore();
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ctx.save();
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ctx.translate(offset.x, offset.y);
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ctx.rotate(-opts.right.angle);
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drawEllipseByCenter(ctx, opts.right.x - offset.x, opts.right.y - offset.y, opts.right.width, opts.right.height, opts.color, null, opts.kappa);
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ctx.restore();
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}
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function renderEyes(ctx, opts) {
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switch (opts.style) {
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case "ellipse":
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drawEllipseByCenter(ctx, opts.left.x, opts.left.y, opts.width, opts.height, "black", null, 0.5);
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drawEllipseByCenter(ctx, opts.right.x, opts.right.y, opts.width, opts.height, "black", null, 0.5);
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break;
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case "smiley":
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ctx.strokeStyle = "black";
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ctx.beginPath();
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ctx.moveTo(opts.left.x - opts.width, opts.left.y + opts.height);
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ctx.bezierCurveTo(opts.left.x - opts.width, opts.left.y + opts.height, opts.left.x, opts.left.y, opts.left.x + opts.width, opts.left.y + opts.height);
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ctx.lineWidth = 2;
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ctx.stroke();
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ctx.closePath();
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ctx.beginPath();
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ctx.moveTo(opts.right.x - opts.width, opts.right.y + opts.height);
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ctx.bezierCurveTo(opts.right.x - opts.width, opts.right.y + opts.height, opts.right.x, opts.right.y, opts.right.x + opts.width, opts.right.y + opts.height);
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ctx.lineWidth = 2;
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ctx.stroke();
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ctx.closePath();
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break;
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case "none":
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break;
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}
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}
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function renderNose(ctx, opts) {
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ctx.strokeStyle = "black";
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ctx.beginPath();
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ctx.moveTo(opts.x - opts.width/2, opts.y - opts.height/2);
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ctx.bezierCurveTo(opts.x - opts.width/2, opts.y - opts.height/2, opts.x, opts.y - opts.height, opts.x + opts.width/2, opts.y - opts.height/2);
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ctx.bezierCurveTo(opts.x + opts.width/2, opts.y - opts.height/2, opts.x + opts.width/2, opts.y + opts.height/2, opts.x, opts.y + opts.height/2);
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ctx.bezierCurveTo(opts.x, opts.y + opts.height/2, opts.x - opts.width/2, opts.y + opts.height/2, opts.x - opts.width/2, opts.y - opts.height/2);
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ctx.fillStyle = "black";
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ctx.fill();
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ctx.stroke();
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}
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function renderMouth(ctx, opts) {
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ctx.strokeStyle = "black";
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ctx.lineWidth = 2;
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ctx.beginPath();
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switch (opts.style) {
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case "smirk":
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ctx.moveTo(opts.x - opts.width/2, opts.y - opts.height/2);
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ctx.bezierCurveTo(opts.x - opts.width/2, opts.y - opts.height/2,
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opts.x - opts.width/2, opts.y + opts.height/2,
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opts.x + opts.width/2, opts.y
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)
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break;
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case "cat":
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ctx.moveTo(opts.x - opts.width/2, opts.y + opts.height/2);
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ctx.lineTo(opts.x, opts.y - opts.height/2);
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ctx.lineTo(opts.x + opts.width/2, opts.y + opts.height/2);
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break;
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}
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ctx.stroke();
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}
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function drawEllipseByCenter(ctx, cx, cy, w, h, color, fillColor, kappa) {
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drawEllipse(ctx, cx - w/2.0, cy - h/2.0, w, h, color, fillColor, kappa);
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}
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function drawEllipse(ctx, x, y, w, h, color, fillColor, kappa) {
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var kappa = kappa || 0.3,
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ox = (w / 2) * kappa, // control point offset horizontal
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oy = (h / 2) * kappa, // control point offset vertical
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xe = x + w, // x-end
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ye = y + h, // y-end
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xm = x + w / 2, // x-middle
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ym = y + h / 2; // y-middle
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if (color) {
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ctx.strokeStyle = color;
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}
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ctx.beginPath();
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ctx.moveTo(x, ym);
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ctx.bezierCurveTo(x, ym - oy, xm - ox, y, xm, y);
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ctx.bezierCurveTo(xm + ox, y, xe, ym - oy, xe, ym);
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ctx.bezierCurveTo(xe, ym + oy, xm + ox, ye, xm, ye);
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ctx.bezierCurveTo(xm - ox, ye, x, ym + oy, x, ym);
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var fillColor = fillColor || color;
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if (fillColor) {
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ctx.fillStyle = fillColor;
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ctx.fill();
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}
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ctx.stroke();
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}
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module.exports = renderFox;
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167
server.js
167
server.js
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@ -3,178 +3,15 @@ var express = require('express');
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var Canvas = require('canvas');
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var Fox = require('./js/fox.js');
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var renderFox = function (canvas, opts) {
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var width = opts.canvas.width;
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var height = opts.canvas.height;
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var ctx = canvas.getContext('2d');
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ctx.fillStyle = opts.canvas.color;
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ctx.fillRect(0, 0, width, height);
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// draw ears
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renderEars(ctx, opts.ears);
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// draw head
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renderHead(ctx, opts.head);
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// draw eyes
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renderEyes(ctx, opts.eyes);
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// draw cheeks
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// draw eyes
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// draw nose
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renderNose(ctx, opts.nose);
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// draw mouth
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renderMouth(ctx, opts.mouth);
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};
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function renderHead(ctx, opts) {
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ctx.save();
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ctx.translate(ctx.canvas.width/2, ctx.canvas.height/2);
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ctx.rotate(Math.PI / 4);
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drawEllipseByCenter(ctx, 0, 0, opts.width, opts.height, opts.color, null, opts.kappa);
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ctx.restore();
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ctx.clip();
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drawEllipseByCenter(ctx, ctx.canvas.width / 2, ctx.canvas.height, opts.maskWidth, opts.maskHeight, '#fff', '#fff', 0.5);
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}
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function renderEars(ctx, opts) {
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var offset = {
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x: ctx.canvas.width/2,
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y: ctx.canvas.height/2
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}
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ctx.save();
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ctx.translate(offset.x, offset.y);
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ctx.rotate(-opts.left.angle);
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drawEllipseByCenter(ctx, opts.left.x - offset.x, opts.left.y - offset.y, opts.left.width, opts.left.height, opts.color, null, opts.kappa);
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ctx.restore();
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ctx.save();
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ctx.translate(offset.x, offset.y);
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ctx.rotate(-opts.right.angle);
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drawEllipseByCenter(ctx, opts.right.x - offset.x, opts.right.y - offset.y, opts.right.width, opts.right.height, opts.color, null, opts.kappa);
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ctx.restore();
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}
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function renderEyes(ctx, opts) {
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switch (opts.style) {
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case "ellipse":
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drawEllipseByCenter(ctx, opts.left.x, opts.left.y, opts.width, opts.height, "black", null, 0.5);
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drawEllipseByCenter(ctx, opts.right.x, opts.right.y, opts.width, opts.height, "black", null, 0.5);
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break;
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case "smiley":
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ctx.strokeStyle = "black";
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ctx.beginPath();
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ctx.moveTo(opts.left.x - opts.width, opts.left.y + opts.height);
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ctx.bezierCurveTo(opts.left.x - opts.width, opts.left.y + opts.height, opts.left.x, opts.left.y, opts.left.x + opts.width, opts.left.y + opts.height);
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ctx.lineWidth = 2;
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ctx.stroke();
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ctx.closePath();
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ctx.beginPath();
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ctx.moveTo(opts.right.x - opts.width, opts.right.y + opts.height);
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ctx.bezierCurveTo(opts.right.x - opts.width, opts.right.y + opts.height, opts.right.x, opts.right.y, opts.right.x + opts.width, opts.right.y + opts.height);
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ctx.lineWidth = 2;
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ctx.stroke();
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ctx.closePath();
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break;
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case "none":
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break;
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}
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}
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function renderNose(ctx, opts) {
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ctx.strokeStyle = "black";
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ctx.beginPath();
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ctx.moveTo(opts.x - opts.width/2, opts.y - opts.height/2);
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ctx.bezierCurveTo(opts.x - opts.width/2, opts.y - opts.height/2, opts.x, opts.y - opts.height, opts.x + opts.width/2, opts.y - opts.height/2);
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ctx.bezierCurveTo(opts.x + opts.width/2, opts.y - opts.height/2, opts.x + opts.width/2, opts.y + opts.height/2, opts.x, opts.y + opts.height/2);
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ctx.bezierCurveTo(opts.x, opts.y + opts.height/2, opts.x - opts.width/2, opts.y + opts.height/2, opts.x - opts.width/2, opts.y - opts.height/2);
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ctx.fillStyle = "black";
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ctx.fill();
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ctx.stroke();
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}
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function renderMouth(ctx, opts) {
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ctx.strokeStyle = "black";
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ctx.lineWidth = 2;
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ctx.beginPath();
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switch (opts.style) {
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case "smirk":
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ctx.moveTo(opts.x - opts.width/2, opts.y - opts.height/2);
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ctx.bezierCurveTo(opts.x - opts.width/2, opts.y - opts.height/2,
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opts.x - opts.width/2, opts.y + opts.height/2,
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opts.x + opts.width/2, opts.y
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)
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break;
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case "cat":
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ctx.moveTo(opts.x - opts.width/2, opts.y + opts.height/2);
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ctx.lineTo(opts.x, opts.y - opts.height/2);
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ctx.lineTo(opts.x + opts.width/2, opts.y + opts.height/2);
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break;
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}
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ctx.stroke();
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}
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function drawEllipseByCenter(ctx, cx, cy, w, h, color, fillColor, kappa) {
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console.log("ellipse coords", cx, cy, w, h);
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drawEllipse(ctx, cx - w/2.0, cy - h/2.0, w, h, color, fillColor, kappa);
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}
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function drawEllipse(ctx, x, y, w, h, color, fillColor, kappa) {
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var kappa = kappa || 0.3,
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ox = (w / 2) * kappa, // control point offset horizontal
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oy = (h / 2) * kappa, // control point offset vertical
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xe = x + w, // x-end
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ye = y + h, // y-end
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xm = x + w / 2, // x-middle
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ym = y + h / 2; // y-middle
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if (color) {
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ctx.strokeStyle = color;
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}
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ctx.beginPath();
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ctx.moveTo(x, ym);
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ctx.bezierCurveTo(x, ym - oy, xm - ox, y, xm, y);
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ctx.bezierCurveTo(xm + ox, y, xe, ym - oy, xe, ym);
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ctx.bezierCurveTo(xe, ym + oy, xm + ox, ye, xm, ye);
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ctx.bezierCurveTo(xm - ox, ye, x, ym + oy, x, ym);
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var fillColor = fillColor || color;
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if (fillColor) {
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ctx.fillStyle = fillColor;
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ctx.fill();
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}
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//ctx.closePath(); // not used correctly, see comments (use to close off open path)
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ctx.stroke();
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}
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var circle = function(c){
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var ctx= c.context || false;
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var x=c.x || 500;
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var y=c.y || x;
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var r=c.r || 10;
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var cr=ctx.canvas.width/2;
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var lineWidth=c.lineWidth || 1;
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ctx.beginPath();
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ctx.arc(x,y,r,0,2*Math.PI);
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ctx.lineWidth=lineWidth;
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ctx.fillStyle="red";
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ctx.fill();
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ctx.stroke();
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return true;
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};
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var renderFox = require('./js/render-fox.js');
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function writeFoxesToDisk (width, height, n=10) {
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var fileNames = [];
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for (var i = 0; i < n; i++) {
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var Image = Canvas.Image;
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var canvas = new Canvas(width, height);
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var ctx = canvas.getContext('2d');
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var fox = Fox(width, height);
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renderFox(canvas, fox);
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var img = new Buffer(canvas.toDataURL(), 'base64');
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var fileName = "fox" + Math.floor(Math.random() * 10000) + ".png";
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var filePath = __dirname + '/images/' + fileName;
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@ -192,7 +29,7 @@ var app = express();
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app.use(express.static(__dirname + '/images'));
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app.get('/', function(req, res) {
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var fileNames = writeFoxesToDisk(300, 300, 30);
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var fileNames = writeFoxesToDisk(200, 200, 30);
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var images = fileNames.map(fileName => '<img src="/' + fileName + '"/>');
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res.send(images.join(''));
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});
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