110 lines
1.9 KiB
JavaScript
110 lines
1.9 KiB
JavaScript
"use strict";
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/** @constructor */
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function Line(x1, y1, x2, y2)
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{
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this.p1 = { x: x1, y: y1 };
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this.p2 = { x: x2, y: y2 };
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// it has to include the last point, so + 1
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this.width = Math.abs(this.p1.x - this.p2.x) + 1,
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this.height = Math.abs(this.p1.y - this.p2.y) + 1;
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this.bitmap = null;
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//console.log(this.getPixels());
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}
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Line.prototype.getBitmap = function()
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{
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if(this.bitmap)
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{
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return this.bitmap;
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}
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var
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// may be infinity, be careful with it
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m = (this.height - 1) / (this.width - 1);
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this.bitmap = new Bitmap(this.width, this.height);
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// current strategy:
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// if slope is > 1, walk from y1 to y2,
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// otherwise, walk from x1 to x2
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if(m > 1)
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{
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for(var i = 0; i < this.height; i++)
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{
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this.bitmap.set(
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Math.round(i / m),
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i,
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1
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);
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}
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}
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else
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{
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for(var i = 0; i < this.width; i++)
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{
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this.bitmap.set(
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i,
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Math.round(i * m),
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1
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);
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}
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}
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return this.bitmap;
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};
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/** @constructor */
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function Rectangle(width, height)
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{
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this.width = width;
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this.height = height;
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this.bitmap = null;
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}
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Rectangle.prototype.getBitmap = function()
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{
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if(this.bitmap)
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{
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return this.bitmap;
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}
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this.bitmap = new Bitmap(this.width, this.height);
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for(var i = 0; i < this.bitmap.count; i++)
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{
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this.bitmap.data[i] = 1;
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}
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return this.bitmap;
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};
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/** @constructor */
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function AutoShape(image)
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{
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this.width = image.width;
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this.height = image.height;
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this.image = image;
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this.bitmap = null;
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}
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AutoShape.prototype.getBitmap = function()
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{
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if(!this.bitmap)
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{
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this.bitmap = Bitmap.fromImage(this.image);
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}
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return this.bitmap;
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};
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