From 798da6bd4b3fbd2f6cbe59a5b1333238edb59443 Mon Sep 17 00:00:00 2001
From: Michael Czechowski <mail@dailysh.it>
Date: Tue, 7 Aug 2018 18:22:51 +0200
Subject: [PATCH] prepared animations and added central arithmetic service

---
 src/app/app.component.html                |  2 +-
 src/app/app.component.ts                  |  1 +
 src/app/app.module.ts                     |  4 +-
 src/app/components/graphs.component.ts    | 92 +++++++++++------------
 src/app/directives/guilloche.directive.ts | 35 ++-------
 src/app/services/animation.service.ts     | 32 +++++---
 src/app/services/arithmetic.service.ts    | 73 ++++++++++++++++++
 7 files changed, 151 insertions(+), 88 deletions(-)
 create mode 100644 src/app/services/arithmetic.service.ts

diff --git a/src/app/app.component.html b/src/app/app.component.html
index be7f208..a651ac9 100644
--- a/src/app/app.component.html
+++ b/src/app/app.component.html
@@ -1,4 +1,4 @@
-<app-graphs [config]="config" [restoredHistory]="restoredHistory" (svgChange)="prepareSvgExport($event)"></app-graphs>
+<app-graphs [config]="config" [restoredHistory]="restoredHistory" (svgChange)="prepareSvgExport($event)" [animationActive]="animationActive"></app-graphs>
 
 <aside class="col-sm-4 col-lg-3 col-xl-3">
   <div class="aside-inner">
diff --git a/src/app/app.component.ts b/src/app/app.component.ts
index 9c1e829..17b03dc 100644
--- a/src/app/app.component.ts
+++ b/src/app/app.component.ts
@@ -1,3 +1,4 @@
+import { AnimationService } from './services/animation.service';
 /**
  * Copyright (C) 2018 Michael Czechowski <mail@dailysh.it>
  * This program is free software; you can redistribute it and/or modify it
diff --git a/src/app/app.module.ts b/src/app/app.module.ts
index befb655..7307278 100644
--- a/src/app/app.module.ts
+++ b/src/app/app.module.ts
@@ -25,6 +25,7 @@ import { GuillocheDirective } from './directives/guilloche.directive';
 import { CanvasService } from './services/canvas.service';
 import { HistoryService } from './services/history.service';
 import { AnimationService } from './services/animation.service';
+import { ArithmeticService } from './services/arithmetic.service';
 
 @NgModule({
   declarations: [
@@ -41,7 +42,8 @@ import { AnimationService } from './services/animation.service';
   providers: [
     CanvasService,
     HistoryService,
-    AnimationService
+    AnimationService,
+    ArithmeticService,
   ],
   bootstrap: [AppComponent]
 })
diff --git a/src/app/components/graphs.component.ts b/src/app/components/graphs.component.ts
index 94ad20e..3163fa7 100644
--- a/src/app/components/graphs.component.ts
+++ b/src/app/components/graphs.component.ts
@@ -14,16 +14,19 @@
  * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
-import { ViewChild, QueryList, Component, Input, Output, SimpleChanges, OnChanges, HostListener, EventEmitter } from '@angular/core';
+import { ViewChild, QueryList, Component, Input, Output, SimpleChanges, OnChanges, HostListener, EventEmitter, OnInit } from '@angular/core';
+import { Observable, interval, Subscription } from 'rxjs';
 import * as Selection from 'd3-selection';
 import * as Shape from 'd3-shape';
 import * as Random from 'd3-random';
 import * as Drag from 'd3-drag';
 
 import { environment as env } from '../../environments/environment';
-import { GuillocheDirective } from './../directives/guilloche.directive';
 import { CanvasService } from './../services/canvas.service';
 import { HistoryService } from './../services/history.service';
+import { AnimationService } from '../services/animation.service';
+import { ArithmeticService } from '../services/arithmetic.service';
+import { GuillocheDirective } from './../directives/guilloche.directive';
 import { Graph } from '../models/graph.model';
 import { Point } from '../models/point.model';
 
@@ -32,7 +35,7 @@ import { Point } from '../models/point.model';
   templateUrl: './graphs.component.html',
   styleUrls: ['./graphs.component.scss']
 })
-export class GraphsComponent implements OnChanges {
+export class GraphsComponent implements OnChanges, OnInit {
 
   public canvas: any | null;
   public matrix: any | null;
@@ -41,34 +44,60 @@ export class GraphsComponent implements OnChanges {
   private genShiftPoint: any | null;
   private genLoadedAllGraphs: any | null;
   private hash: string;
+  private animation: Observable<Graph[]>;
+  private timer: Observable<number>;
+  private animationSteps: Subscription;
 
   @Input() config: any;
   @Input() restoredHistory: any;
+  @Input() animationActive: boolean;
   @Output() svgChange = new EventEmitter();
   @Output() graphChange = new EventEmitter();
   @ViewChild('svg') svgElementRef;
 
   constructor(
     private canvasService: CanvasService,
-    private historyService: HistoryService
+    private historyService: HistoryService,
+    private animationService: AnimationService,
+    private arithmetics: ArithmeticService
   ) {
     this.genLoadedAllGraphs = this.countLoadedGraphs();
+    this.timer = interval(500);
+  }
+
+  ngOnInit() {
+    this.updateGraphs();
   }
 
   ngOnChanges(changes: SimpleChanges) {
     this.updateCanvas();
     this.updateMatrix();
 
-    if (changes.restoredHistory) {
-      if (changes.restoredHistory.currentValue) {
-        if (this.restoredHistory.hash !== this.hash) {
-          this.graphs = this.restoredHistory.graphs;
-          this.hash = this.restoredHistory.hash;
+    if (changes.config && !changes.config.firstChange) {
+      this.updateGraphs();
+      return;
+    }
+
+    if (this.restoredHistory && this.restoredHistory.hash !== this.hash) {
+      this.graphs = this.restoredHistory.graphs;
+      this.hash = this.restoredHistory.hash;
+    }
+
+    if (changes.animationActive) {
+      if (this.animationActive) {
+        this.animationSteps = this.timer.subscribe(n => {
+          console.log('Animation step', n);
+          this.graphs = this.animationService.animate(this.graphs);
+          // this.graphs = this.graphs;
+          this.hash = this.historyService.hash(this.graphs);
+          this.saveHistory();
+        });
+      } else {
+        if (this.animationSteps) {
+          this.animationSteps.unsubscribe();
         }
-        return;
       }
     }
-    this.updateGraphs();
   }
 
   private saveHistory() {
@@ -112,7 +141,7 @@ export class GraphsComponent implements OnChanges {
     const generatedPoints = [];
 
     for (let i = 0; i < this.config.nodes; i++) {
-      generatedPoints.push(this.randomPoint);
+      generatedPoints.push(this.arithmetics.randomPoint(this.matrix, this.config.overlap));
     }
 
     return generatedPoints;
@@ -127,22 +156,15 @@ export class GraphsComponent implements OnChanges {
     this.canvasService.set(this.canvas);
   }
 
-  private centerPoint(width, height): Point {
-    return {
-      x: width * 0.5,
-      y: height * 0.5
-    };
-  }
-
   private updateMatrix() {
     const totalArea = Math.abs(this.canvas.clientWidth * this.canvas.clientHeight);
-    const totalCenter = this.centerPoint(this.canvas.clientWidth, this.canvas.clientHeight);
+    const totalCenter = this.arithmetics.centerPoint(this.canvas.clientWidth, this.canvas.clientHeight);
 
     const baseArea = Math.abs(this.config.width * this.config.height);
     const baseScale = Math.pow(totalArea / baseArea * this.config.scale, 0.5);
     const baseWidthScaled = baseScale * this.config.width;
     const baseHeightScaled = baseScale * this.config.height;
-    const baseCenter = this.centerPoint(baseWidthScaled, baseHeightScaled);
+    const baseCenter = this.arithmetics.centerPoint(baseWidthScaled, baseHeightScaled);
 
     this.matrix = {
       start: {
@@ -160,7 +182,7 @@ export class GraphsComponent implements OnChanges {
   }
 
   private genVectorPoint(point: Point, vector: number) {
-    const range = this.Δ(this.matrix.start, this.matrix.end) * this.config.vectors.range;
+    const range = this.arithmetics.Δ(this.matrix.start, this.matrix.end) * this.config.vectors.range;
 
     return {
       x: range * Math.sin(Math.PI * vector) + point.x,
@@ -168,32 +190,6 @@ export class GraphsComponent implements OnChanges {
     };
   }
 
-  private get randomPoint() {
-    const overlap = this.config.overlap;
-    const x = {
-      min: this.matrix.center.x - this.matrix.width * overlap,
-      max: this.matrix.center.x + this.matrix.width * overlap
-    };
-    const y = {
-      min: this.matrix.center.y - this.matrix.height * overlap,
-      max: this.matrix.center.y + this.matrix.height * overlap
-    };
-
-    return {
-      x: Random.randomUniform(x.min, x.max)(),
-      y: Random.randomUniform(y.min, y.max)()
-    };
-  }
-
-  /**
-   * Calculate distance between to points with coordinates.
-   * @param a
-   * @param b
-   */
-  private Δ(a: Point, b: Point) {
-    return Math.pow(Math.pow(a.x - b.x, 2) + Math.pow(a.y - b.y, 2), 0.5);
-  }
-
   private *shiftPoint(point: Point, vector) {
     const genShiftX = this.shiftNumber(this.config.space, vector);
     const genShiftY = this.shiftNumber(this.config.space, vector);
diff --git a/src/app/directives/guilloche.directive.ts b/src/app/directives/guilloche.directive.ts
index c23476e..922106c 100644
--- a/src/app/directives/guilloche.directive.ts
+++ b/src/app/directives/guilloche.directive.ts
@@ -26,6 +26,7 @@ import { Graph } from './../models/graph.model';
 import { Point } from './../models/point.model';
 import { Param } from './../models/param.model';
 import { CanvasService } from './../services/canvas.service';
+import { ArithmeticService } from './../services/arithmetic.service';
 
 @Directive({
   selector: '[guilloche]'
@@ -43,7 +44,8 @@ export class GuillocheDirective implements OnChanges {
 
   constructor(
     private canvasService: CanvasService,
-    private el: ElementRef
+    private el: ElementRef,
+    private arithmetics: ArithmeticService
   ) {
     this.group = Selection.select(el.nativeElement);
     this.canvas = Selection.select(this.canvasService.get);
@@ -81,8 +83,8 @@ export class GuillocheDirective implements OnChanges {
   private spreadLines(points: Point[]) {
     const indexMiddle = Math.floor(points.length * 0.5);
     const pointMiddle = points[indexMiddle];
-    const closestCenter = this.getClosestCenter(pointMiddle);
-    const radius = this.Δ(pointMiddle, closestCenter);
+    const closestCenter = this.arithmetics.getClosestCenter(pointMiddle, this.matrix);
+    const radius = this.arithmetics.Δ(pointMiddle, closestCenter);
     const spreadPoints = [];
     const pies = 80;
 
@@ -95,7 +97,7 @@ export class GuillocheDirective implements OnChanges {
 
     spreadPoints.sort((a, b) => {
       // Good possibility to align orientation points outsite
-      return this.Δ(b, pointMiddle) - this.Δ(a, pointMiddle);
+      return this.arithmetics.Δ(b, pointMiddle) - this.arithmetics.Δ(a, pointMiddle);
     });
 
     spreadPoints.some((point, index) => {
@@ -108,31 +110,6 @@ export class GuillocheDirective implements OnChanges {
 
   }
 
-  private getClosestCenter(point: Point) {
-    if (this.Δ(point, this.matrix.start) < this.Δ(point, this.matrix.end)) {
-      return this.matrix.start;
-    } else {
-      return this.matrix.end;
-    }
-  }
-
-  private getFarestCenter(point: Point) {
-    if (this.Δ(point, this.matrix.start) > this.Δ(point, this.matrix.end)) {
-      return this.matrix.start;
-    } else {
-      return this.matrix.end;
-    }
-  }
-
-  /**
-   * Calculate distance between to points with coordinates.
-   * @param a
-   * @param b
-   */
-  private Δ(a: Point, b: Point) {
-    return Math.pow(Math.pow(a.x - b.x, 2) + Math.pow(a.y - b.y, 2), 0.5);
-  }
-
   private showGrid() {
     this.graph.nodes.forEach(point => {
       this.group.append('circle')
diff --git a/src/app/services/animation.service.ts b/src/app/services/animation.service.ts
index 08a82b5..0b245ca 100644
--- a/src/app/services/animation.service.ts
+++ b/src/app/services/animation.service.ts
@@ -15,6 +15,7 @@
  */
 
 import { Inject, Injectable, Optional, ViewChild } from '@angular/core';
+import { interval, Observable } from 'rxjs';
 import * as Selection from 'd3-selection';
 
 import { Graph } from '../models/graph.model';
@@ -26,8 +27,11 @@ export class AnimationService {
   public speed: number;
   public range: number;
   public genAnimation: any;
+  private timer: Observable<number>;
+  private subscribtion: any;
 
   constructor() {
+    this.timer = interval(500);
     this.resetAnimation();
   }
 
@@ -35,22 +39,32 @@ export class AnimationService {
     this.genAnimation = this.animateNextStep();
   }
 
-  private animateNextStep() {
+  private *animateNextStep() {
     while (this.graphs) {
-      return true;
+      yield this.graphs = this.graphs.map(graph => {
+        console.log(graph);
+        return graph;
+      });
     }
   }
 
-  public init(initialGraphs: Graph[]) {
+  // public start(initialGraphs: Graph[]): Observable<Graph[]> {
+  //   // this.graphs = initialGraphs.map(graph => {
+  //   //   console.log(graph);
+  //   //   return graph;
+  //   // });
+
+  //   // return this.timer.subscribe(n => this.graphs);
+  // }
+
+  // public animate(): Graph[] {
+  //   return this.genAnimation.next().value;
+  // }
+
+  public animate(initialGraphs: Graph[]) {
     this.graphs = initialGraphs;
-  }
 
-  public animate(): Graph[] {
     return this.genAnimation.next().value;
   }
-
-  public stop() {
-    this.graphs = null;
-  }
 }
 
diff --git a/src/app/services/arithmetic.service.ts b/src/app/services/arithmetic.service.ts
new file mode 100644
index 0000000..f79ff79
--- /dev/null
+++ b/src/app/services/arithmetic.service.ts
@@ -0,0 +1,73 @@
+/**
+ * Copyright (C) 2018 Michael Czechowski <mail@dailysh.it>
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+import { Inject, Injectable } from '@angular/core';
+import * as Selection from 'd3-selection';
+import * as Random from 'd3-random';
+
+import { Point } from './../models/point.model';
+
+@Injectable()
+export class ArithmeticService {
+
+  /**
+   * Calculate distance between to points with coordinates.
+   * @param a
+   * @param b
+   */
+  public Δ(a: Point, b: Point) {
+    return Math.pow(Math.pow(a.x - b.x, 2) + Math.pow(a.y - b.y, 2), 0.5);
+  }
+
+  public getClosestCenter(point: Point, matrix: any) {
+    if (this.Δ(point, matrix.start) < this.Δ(point, matrix.end)) {
+      return matrix.start;
+    } else {
+      return matrix.end;
+    }
+  }
+
+  public getFarestCenter(point: Point, matrix: any) {
+    if (this.Δ(point, matrix.start) > this.Δ(point, matrix.end)) {
+      return matrix.start;
+    } else {
+      return matrix.end;
+    }
+  }
+
+  public randomPoint(matrix: any, overlap: number) {
+    const x = {
+      min: matrix.center.x - matrix.width * overlap,
+      max: matrix.center.x + matrix.width * overlap
+    };
+    const y = {
+      min: matrix.center.y - matrix.height * overlap,
+      max: matrix.center.y + matrix.height * overlap
+    };
+
+    return {
+      x: Random.randomUniform(x.min, x.max)(),
+      y: Random.randomUniform(y.min, y.max)()
+    };
+  }
+
+  public centerPoint(width, height): Point {
+    return {
+      x: width * 0.5,
+      y: height * 0.5
+    };
+  }
+}