QB64/qbjs
QB64/qbjs
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Circle thickness increases with size to offset antialiasing artifacts.

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This commit is contained in:
William Barnes 2022-06-09 14:22:46 -04:00
parent d4a1921d73
commit 7c78d4bcf6
1 changed files with 7 additions and 5 deletions
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12
qb.js
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@ -141,12 +141,12 @@ var QB = new function() {
// --------------------------------------------
this.func__Alpha = function(rgb, imageHandle) {
// TODO: implement corresponding logic when an image handle is supplied (maybe)
return _color(rgb).a * 255;
return _color(rgb).a;// * 255;
};
this.func__Alpha32 = function(rgb) {
// TODO: implement corresponding logic when an image handle is supplied (maybe)
return _color(rgb).a * 255;
return _color(rgb).a;// * 255;
};
this.func__Atan2 = function(y, x) {
@ -1183,6 +1183,7 @@ var QB = new function() {
screen.lastY = y;
ctx.lineWidth = _strokeLineThickness;
ctx.lineWidth += Math.tanh(radius); // Adds some radius to compensate for antialiasing.
ctx.strokeStyle = color.rgba();
ctx.beginPath();
if (aspect == undefined) {
@ -1395,6 +1396,7 @@ var QB = new function() {
};
this.sub_Paint = function(sstep, startX, startY, fillColor, borderColor) {
// See: http://www.williammalone.com/articles/html5-canvas-javascript-paint-bucket-tool/
_images[_activeImage].dirty = true;
var screen = _images[_activeImage];
var ctx = screen.ctx;
@ -1468,9 +1470,9 @@ var QB = new function() {
function checkPixel(dat, p, c1, c2) {
var r = dat[p];
var g = dat[p+1];
var g = dat[p+1];
var b = dat[p+2];
//var a = dat[p+3];
//var a = dat[p+3]; // 0 < a < 255
var thresh = 2;
if ((Math.abs(r - c1.r) < thresh) && (Math.abs(g - c1.g) < thresh) && (Math.abs(b - c1.b) < thresh)) { return false; }
if ((Math.abs(r - c2.r) < thresh) && (Math.abs(g - c2.g) < thresh) && (Math.abs(b - c2.b) < thresh)) { return false; }
@ -1493,7 +1495,7 @@ var QB = new function() {
}
} else if (x == 3) {
if (_windowAspect[0] != false) {
ret = windowUnContendY(screen.lastY, screen.canvas.height)
ret = windowUnContendY(screen.lastY, screen.canvas.height);
} else {
ret = screen.lastY;
}