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Refines Circle tool for PenSize = 1

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Smie 2017-01-26 15:38:58 -07:00 committed by Julian Descottes
parent cce4cde98b
commit 35bfcb5f00
1 changed files with 24 additions and 4 deletions
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28
src/js/tools/drawing/Circle.js
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@ -26,14 +26,37 @@
};
ns.Circle.prototype.getCirclePixels_ = function (x0, y0, x1, y1, penSize) {
var coords = pskl.PixelUtils.getOrderedRectangleCoordinates(x0, y0, x1, y1);
var pixels = [];
var xC = Math.round((coords.x0 + coords.x1) / 2);
var yC = Math.round((coords.y0 + coords.y1) / 2);
var evenX = (coords.x0 + coords.x1) % 2;
var evenY = (coords.y0 + coords.y1) % 2;
var rX = coords.x1 - xC;
var rY = coords.y1 - yC;
var x, y, angle, r;
if (penSize == 1) {
for (x = coords.x0 ; x <= xC ; x++) {
angle = Math.acos((x - xC) / rX);
y = Math.round(rY * Math.sin(angle) + yC);
pixels.push([x - evenX, y]);
pixels.push([x - evenX, 2 * yC - y - evenY]);
pixels.push([2 * xC - x, y]);
pixels.push([2 * xC - x, 2 * yC - y - evenY]);
}
for (y = coords.y0 ; y <= yC ; y++) {
angle = Math.asin((y - yC) / rY);
x = Math.round(rX * Math.cos(angle) + xC);
pixels.push([x, y - evenY]);
pixels.push([2 * xC - x - evenX, y - evenY]);
pixels.push([x, 2 * yC - y]);
pixels.push([2 * xC - x - evenX, 2 * yC - y]);
}
return pixels;
}
var iX = rX - penSize;
var iY = rY - penSize;
if (iX < 0) {
@ -43,9 +66,6 @@
iY = 0;
}
var pixels = [];
var x, y, angle, r;
for (x = 0 ; x <= rX ; x++) {
for (y = 0 ; y <= rY ; y++) {
angle = Math.atan(y / x);