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Copy pathwinrate_graph.ts
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214 lines (191 loc) · 5.81 KB
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// Copyright 2018 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import {Nullable} from './base'
import {Position} from './position'
import {getElement, pixelRatio} from './util'
import {Graph} from './graph'
function arraysApproxEqual(a: Nullable<number>[], b: Nullable<number>[]
8000
,
threshold: number) {
if (a.length != b.length) {
return false;
}
for (let i = 0; i < a.length; ++i) {
let ai = a[i];
let bi = b[i];
if ((ai == null) != (bi == null)) {
return false;
}
if (ai != null && bi != null && Math.abs(ai - bi) > threshold) {
return false;
}
}
return true;
}
class WinrateGraph extends Graph {
protected ctx: CanvasRenderingContext2D;
protected mainLine: Nullable<number>[] = [];
protected variation: Nullable<number>[] = [];
protected rootPosition: Nullable<Position> = null;
protected activePosition: Nullable<Position> = null;
constructor(parent: HTMLElement | string) {
super(parent, {
xStart: 0,
xEnd: 10,
yStart: 1,
yEnd: -1,
marginTop: 0.05,
marginBottom: 0.05,
marginLeft: 0.075,
marginRight: 0.125,
});
if (typeof(parent) == 'string') {
parent = getElement(parent);
}
}
newGame() {
this.rootPosition = null;
this.activePosition = null;
this.mainLine = [];
this.variation = [];
this.xEnd = 10;
this.draw();
}
setActive(position: Position) {
if (this.rootPosition == null && position.parent == null) {
this.rootPosition = position;
}
if (position != this.activePosition) {
this.xEnd = Math.max(this.xEnd, position.moveNum);
this.activePosition = position;
this.update(position);
this.draw();
}
}
update(position: Position) {
if (this.rootPosition == null || this.activePosition == null) {
return;
}
if (!position.isMainLine) {
// The updated position isn't on the main line, we may not need to update
// anything.
if (this.activePosition.isMainLine) {
// Only showing the main line, nothing to do.
return;
} else if (this.activePosition.getFullLine().indexOf(position) == -1) {
// This position isn't from the current variation, nothing to do.
return;
}
}
// Always check if the main line plot needs updating, since the main line
// and any currently active variation likely share a prefix of moves.
let anythingChanged = false;
let mainLine = this.getWinRate(this.rootPosition.getFullLine());
if (!arraysApproxEqual(mainLine, this.mainLine, 0.001)) {
anythingChanged = true;
this.mainLine = mainLine;
}
// If the updated position is a variation, check if the variation plot needs
// updating.
if (!position.isMainLine) {
let variation = this.getWinRate(position.getFullLine());
if (!arraysApproxEqual(variation, this.variation, 0.001)) {
anythingChanged = true;
this.variation = variation;
}
}
if (anythingChanged) {
this.draw();
}
}
drawImpl() {
super.drawImpl();
let pr = pixelRatio();
let ctx = this.ctx;
// Draw the Y axis labels.
let textHeight = 0.25 * this.marginRight;
ctx.font = `${textHeight}px sans-serif`;
ctx.fillStyle = '#96928f';
ctx.textAlign = 'right';
ctx.textBaseline = 'middle';
this.drawText('B', -4 / this.xScale, 0.95);
this.drawText('W', -4 / this.xScale, -0.95);
if (this.activePosition == null) {
return;
}
let moveNum = this.activePosition.moveNum;
this.drawPlot(
[[moveNum, this.yStart], [moveNum, this.yEnd]], {
dash: [0, 3],
width: 1,
style: '#96928f',
snap: true,
});
if (this.activePosition.isMainLine) {
this.drawVariation('#ffe', this.mainLine);
} else {
this.drawVariation('#615b56', this.mainLine);
this.drawVariation('#ffe', this.variation);
}
// Draw the value label.
ctx.textAlign = 'left';
ctx.fillStyle = '#ffe';
let q: Nullable<number> = 0;
let values =
this.activePosition.isMainLine ? this.mainLine : this.variation;
// Find the first valid Q value.
for (let i = Math.min(moveNum, values.length - 1); i >= 0; --i) {
if (values[i] != null) {
q = values[i];
break;
}
}
if (q != null) {
let score = 50 + 50 * q;
let txt: string;
if (score > 50) {
txt = `B:${Math.round(score)}%`;
} else {
txt = `W:${Math.round(100 - score)}%`;
}
this.drawText(txt, this.xEnd + 4 / this.xScale, q);
}
}
// Returns the win rate estimation for the prefix of `variation` that has
// valid Q values (the backend has either performed tree search or win rate
// evaluation on every position in the prefix at least once).
private getWinRate(variation: Position[]) {
let result: Nullable<number>[] = [];
for (let p of variation) {
result.push(p.q);
}
return result;
}
private drawVariation(style: string, values: Nullable<number>[]) {
if (values.length < 2) {
return;
}
let points: number[][] = [];
for (let i = 0; i < values.length; ++i) {
let v = values[i];
if (v != null) {
points.push([i, v]);
}
}
super.drawPlot(points, {
width: 1,
style: style,
});
}
}
export {WinrateGraph}