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annotate web/drawing.ts @ 2439:06da5db2fafe

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rewrite ascoltami to use the graph for more playback data
author drewp@bigasterisk.com
date Thu, 30 May 2024 01:08:07 -0700
parents 4556eebe5d73
children
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1
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2 export function svgPathFromPoints(pts: { forEach: (arg0: (p: any) => void) => void }) {
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3 let out = "";
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4 pts.forEach(function (p: Number[] | { elements: Number[] }) {
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5 let x, y;
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6 if ((p as any).elements) {
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7 // for vec2
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8 [x, y] = (p as any).elements;
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9 } else {
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10 [x, y] = p as Number[];
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11 }
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12 if (out.length === 0) {
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13 out = "M ";
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14 } else {
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15 out += "L ";
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16 }
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17 out += "" + x + "," + y + " ";
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18 });
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19 return out;
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20 };
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21
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22 export function line(
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23 ctx: { moveTo: (arg0: any, arg1: any) => void; lineTo: (arg0: any, arg1: any) => any },
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24 p1: { e: (arg0: number) => any },
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25 p2: { e: (arg0: number) => any }
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26 ) {
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27 ctx.moveTo(p1.e(1), p1.e(2));
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28 return ctx.lineTo(p2.e(1), p2.e(2));
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29 };
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31 // http://stackoverflow.com/a/4959890
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32 export function roundRect(
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33 ctx: {
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34 beginPath: () => void;
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35 moveTo: (arg0: any, arg1: any) => void;
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36 lineTo: (arg0: number, arg1: number) => void;
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37 arc: (arg0: number, arg1: number, arg2: any, arg3: number, arg4: number, arg5: boolean) => void;
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38 closePath: () => any;
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39 },
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40 sx: number,
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41 sy: number,
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42 ex: number,
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43 ey: number,
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44 r: number
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45 ) {
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46 const d2r = Math.PI / 180;
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47 if (ex - sx - 2 * r < 0) {
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48 r = (ex - sx) / 2;
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49 } // ensure that the radius isn't too large for x
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50 if (ey - sy - 2 * r < 0) {
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51 r = (ey - sy) / 2;
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52 } // ensure that the radius isn't too large for y
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53 ctx.beginPath();
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54 ctx.moveTo(sx + r, sy);
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55 ctx.lineTo(ex - r, sy);
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56 ctx.arc(ex - r, sy + r, r, d2r * 270, d2r * 360, false);
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57 ctx.lineTo(ex, ey - r);
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58 ctx.arc(ex - r, ey - r, r, d2r * 0, d2r * 90, false);
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59 ctx.lineTo(sx + r, ey);
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60 ctx.arc(sx + r, ey - r, r, d2r * 90, d2r * 180, false);
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61 ctx.lineTo(sx, sy + r);
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62 ctx.arc(sx + r, sy + r, r, d2r * 180, d2r * 270, false);
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63 return ctx.closePath();
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64 };