From 065ed23c798f0f26c351081520ca977e13648950 Mon Sep 17 00:00:00 2001
From: Andrey Antukh <niwi@niwi.nz>
Date: Sat, 1 Feb 2020 01:16:47 +0100
Subject: [PATCH] :tada: Add javascript variants of geom.point and geom.matrix.

Only for have them in backup, they are not in use right now
and we dont expect to use them in a near future.
---
 frontend/src/uxbox/util/geom/_matrix.js | 229 ++++++++++++++++++++++
 frontend/src/uxbox/util/geom/_point.js  | 242 ++++++++++++++++++++++++
 2 files changed, 471 insertions(+)
 create mode 100644 frontend/src/uxbox/util/geom/_matrix.js
 create mode 100644 frontend/src/uxbox/util/geom/_point.js

diff --git a/frontend/src/uxbox/util/geom/_matrix.js b/frontend/src/uxbox/util/geom/_matrix.js
new file mode 100644
index 000000000..48b0282e1
--- /dev/null
+++ b/frontend/src/uxbox/util/geom/_matrix.js
@@ -0,0 +1,229 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This Source Code Form is "Incompatible With Secondary Licenses", as
+ * defined by the Mozilla Public License, v. 2.0.
+ *
+ * Copyright (c) 2020 Andrey Antukh <niwi@niwi.nz>
+*/
+
+// NOTE: this code is unused, but is preserved for the case when we
+// note that the cljs impl has not not enough performance.
+
+goog.provide("uxbox.util.geom.matrix_impl");
+goog.provide("uxbox.util.geom.matrix_impl.Matrix");
+goog.require("goog.math");
+goog.require("uxbox.util.geom.point_impl");
+
+goog.scope(function() {
+  const self = uxbox.util.geom.matrix_impl;
+  const gpt = uxbox.util.geom.point_impl;
+  const math = goog.math;
+
+  /**
+   * @param {number} a
+   * @param {number} b
+   * @param {number} c
+   * @param {number} d
+   * @param {number} e
+   * @param {number} f
+   * @struct
+   */
+  class Matrix {
+    constructor(a, b, c, d, e, f) {
+      this.a = a;
+      this.b = b;
+      this.c = c;
+      this.d = d;
+      this.e = e;
+      this.f = f;
+    }
+
+    [Symbol.iterator]() {
+      return [["a", this.a]
+              ["b", this.b]];
+    }
+
+    toString() {
+      return `matrix(${this.a},${this.b},${this.c},${this.d},${this.e},${this.f})`;
+    }
+
+    copy() {
+      return new Matrix(
+        this.a,
+        this.b,
+        this.c,
+        this.d,
+        this.e,
+        this.f
+      );
+    }
+  }
+
+  self.Matrix = Matrix;
+
+  /**
+   * @param {number?} a
+   * @param {number?} b
+   * @param {number?} c
+   * @param {number?} d
+   * @param {number?} e
+   * @param {number?} f
+   * @return {Matrix}
+   */
+  self.matrix = function(a, b, c, d, e, f) {
+    if (a === undefined) {
+      return new Matrix(1,0,0,1,0,0);
+    } else {
+      return new Matrix(a,b,c,d,e,f);
+    }
+  };
+
+  /**
+   * @param {?} m
+   * @return {boolean}
+   */
+  function isMatrix(m) {
+    return m instanceof Matrix;
+  }
+
+  self.isMatrix = isMatrix
+
+
+  /**
+   * @param {Matrix} m1
+   * @param {Matrix} m2
+   * @return {Matrix}
+   */
+  self.multiplyUnsafe = function(m1, m2) {
+    const a = m1.a * m2.a + m1.c * m2.b;
+    const b = m1.b * m2.a + m1.d * m2.b;
+    const c = m1.a * m2.c + m1.c * m2.d;
+    const d = m1.b * m2.c + m1.d * m2.d;
+    const e = m1.a * m2.e + m1.c * m2.f + m1.e;
+    const f = m1.b * m2.e + m1.d * m2.f + m1.f;
+    m1.a = a;
+    m1.b = b;
+    m1.c = c;
+    m1.d = d;
+    m1.e = e;
+    m1.f = f;
+    return m1;
+  }
+
+  /**
+   * @param {Matrix} m1
+   * @param {Matrix} m2
+   * @return {Matrix}
+   */
+  self.multiply = function(m1, m2) {
+    m1 = m1.copy();
+    return self.multiplyUnsafe(m1, m2);
+  }
+
+  /**
+   * @param {...Matrix} matrices
+   * @return {Matrix}
+   */
+  self.compose = function(...matrices) {
+    switch (matrices.length) {
+    case 0:
+      throw new Error('no matrices provided')
+
+    case 1:
+      return matrices[0]
+
+    case 2:
+      return self.multiply(matrices[0], matrices[1])
+
+    default: {
+      let result = matrices[0].copy();
+      for (let i=1; i<matrices.length; i++) {
+        result = self.multiplyUnsafe(result, matrices[i]);
+      }
+      return result;
+    }
+    }
+  };
+
+  /**
+   * @param {gpt.Point} p
+   * @return {Matrix}
+   */
+  self.translateMatrix = function(p) {
+    return new Matrix(1, 0, 0, 1, p.x, p.y);
+  };
+
+  /**
+   * @param {gpt.Point} p
+   * @return {Matrix}
+   */
+  self.scaleMatrix = function(p) {
+    return new Matrix(p.x, 0, 0, p.y, 0, 0);
+  };
+
+  /**
+   * @param {number} angle
+   * @return {Matrix}
+   */
+  self.rotateMatrix = function(angle) {
+    const r = math.toRadiants(angle);
+    return new Matrix(
+      Math.cos(r),
+      Math.sin(r),
+      -Math.sin(r),
+      Math.cos(r),
+      0,
+      0
+    );
+  };
+
+  /**
+   * @param {Matrix} m
+   * @param {gpt.Point} p
+   * @return {Matrix}
+   */
+  self.translate = function(m, p) {
+    return self.multiply(m, self.translateMatrix(p));
+  }
+
+  /**
+   * @param {Matrix} m
+   * @param {angle} angle
+   * @param {gpt.Point?} center
+   * @return {Matrix}
+   */
+  self.rotate = function(m, angle, center) {
+    if (center === undefined) {
+      return self.multiply(m, self.rotateMatrix(angle));
+    } else {
+      return self.compose(
+        m,
+        self.translateMatrix(center),
+        self.rotateMatrix(angle),
+        self.translateMatrix(gpt.negate(center))
+      );
+    }
+  };
+
+  /**
+   * @param {Matrix} m
+   * @param {gpt.Point} scale
+   * @param {gpt.Point?} center
+   * @return {Matrix}
+   */
+  self.scale = function(m, scale, center) {
+    if (center === undefined) {
+      return self.multiply(m, self.scaleMatrix(scale));
+    } else {
+      return self.compose(
+        m,
+        self.translateMatrix(center),
+        self.scaleMatrix(scale),
+        self.translateMatrix(gpt.negate(center))
+      );
+    }
+  };
+});
diff --git a/frontend/src/uxbox/util/geom/_point.js b/frontend/src/uxbox/util/geom/_point.js
new file mode 100644
index 000000000..720d2f904
--- /dev/null
+++ b/frontend/src/uxbox/util/geom/_point.js
@@ -0,0 +1,242 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This Source Code Form is "Incompatible With Secondary Licenses", as
+ * defined by the Mozilla Public License, v. 2.0.
+ *
+ * Copyright (c) 2020 Andrey Antukh <niwi@niwi.nz>
+*/
+
+// NOTE: this code is unused, but is preserved for the case when we
+// note that the cljs impl has not not enough performance.
+
+goog.provide("uxbox.util.geom.point_impl");
+goog.provide("uxbox.util.geom.point_impl.Point");
+goog.require("goog.math");
+
+goog.scope(function() {
+  const self = uxbox.util.geom.point_impl;
+  const math = goog.math;
+
+  /**
+   * @param {number} x
+   * @param {number} y
+   * @struct
+   */
+  class Point {
+    constructor(x, y) {
+      this.x = x;
+      this.y = y;
+    }
+
+    toString() {
+      return "point(" + this.x + ", " + this.y + ")";
+    }
+  }
+
+  self.Point = Point;
+
+  self.point = function(x, y) {
+    let xv = null;
+    let yv = null;
+
+    if (x === undefined) {
+      return new Point(0, 0);
+    } else {
+      xv = x;
+    }
+
+    if (y === undefined) {
+        yv = x;
+    } else {
+      yv = y;
+    }
+
+    return new Point(xv, yv);
+  };
+
+  function isPoint(p) {
+    return p instanceof Point;
+  }
+
+  self.isPoint = isPoint;
+
+  /**
+   * @param {Point} p
+   * @param {number} angle
+   * @return {Point}
+   */
+  self.rotate = function(p, angle) {
+    const r = math.toRadians(angle);
+    const sin = Math.sin(r);
+    const cos = Math.cos(r);
+
+    const x = p.x;
+    const y = p.y;
+
+    const point = new Point(
+      x * cos - y * sin,
+      x * sin + y * cos
+    );
+
+    return self.roundTo(point, 6)
+  };
+
+  /**
+   * @param {Point} p
+   * @param {Point} other
+   * @return {Point}
+   */
+  self.add = function(p, other) {
+    return new Point(
+      p.x + other.x,
+      p.y + other.y
+    );
+  };
+
+  /**
+   * @param {Point} p
+   * @param {Point} other
+   * @return {Point}
+   */
+  self.subtract = function(p, other) {
+    return new Point(
+      p.x - other.x,
+      p.y - other.y
+    );
+  };
+
+  /**
+   * @param {Point} p
+   * @param {Point} other
+   * @return {Point}
+   */
+  self.multiply = function(p, other) {
+    return new Point(
+      p.x * other.x,
+      p.y * other.y
+    );
+  };
+
+  /**
+   * @param {Point} p
+   * @param {Point} other
+   * @return {Point}
+   */
+  self.divide = function(p, other) {
+    return new Point(
+      p.x / other.x,
+      p.y / other.y
+    );
+  };
+
+  /**
+   * @param {Point} p
+   * @return {Point}
+   */
+  self.negate = function(p) {
+    const x = p.x, y = p.y;
+    return new Point(
+      x === 0 ? x : x * -1,
+      y === 0 ? y : y * -1
+    );
+  };
+
+  /**
+   * @param {Point} p
+   * @param {Point} other
+   * @return {number}
+   */
+  self.distance = function(p, other) {
+    const dx = p.x - other.x;
+    const dy = p.y - other.y;
+    return Math.sqrt(Math.pow(dx, 2),
+                     Math.pow(dy, 2));
+  };
+
+  /**
+   * @param {Point} p
+   * @param {Point} center
+   * @return {number}
+   */
+  self.angle = function(p, center) {
+    if (center !== undefined) {
+      p = self.subtract(p, center);
+    }
+
+    return math.toDegrees(Math.atan2(p.y, p.x));
+  };
+
+  /**
+   * @param {Point} p
+   * @param {Point} other
+   * @return {number}
+   */
+  self.length = function(p) {
+    return Math.sqrt(Math.pow(p.x, 2) + Math.pow(p.y, 2));
+  };
+
+  /**
+   * @param {Point} p
+   * @return {number}
+   */
+  self.angle2other = function(p, other) {
+    let angle = ((p.x * other.x) + (p.y * other.y)) / (self.length(p) * self.length(other));
+
+    if (angle < -1) {
+      angle =  -1;
+    } else if (angle > 1) {
+      angle = 1;
+    }
+
+    angle = Math.acos(angle);
+    angle = math.toDegrees(angle);
+    return parseFloat(angle.toFixed(6));
+  };
+
+  /**
+   * @param {Point} p
+   * @param {number} angle
+   * @return {Point}
+   */
+  self.updateAngle = function(p, angle) {
+    const len = self.length(p);
+    const r = math.toRadiants(angle);
+
+    return new Point(
+      Math.cos(r) * len,
+      Math.sin(r) * len
+    );
+  };
+
+  /**
+   * @param {Point} p
+   * @param {number} decimals
+   * @return {Point}
+   */
+  self.roundTo = function(p, decimals) {
+    return new Point(
+      parseFloat(p.x.toFixed(decimals)),
+      parseFloat(p.y.toFixed(decimals))
+    );
+  };
+
+  // class Matrix {
+  //   constructor() {
+  //     this.a = 1;
+  //     this.b = 0;
+  //     this.c = 0;
+  //     this.d = 1;
+  //     this.e = 0;
+  //     this.f = 0;
+  //   }
+  // }
+
+  // self = uxbox.util.geom.matrix_impl;
+  // self.Matrix = Matrix;
+  // self.sayHello = function() {
+  //   console.log("hello");
+  // }
+});