From d9743ba67280140a2e2da7fa89c8b4fc74fcb0a9 Mon Sep 17 00:00:00 2001
From: Val Erastov <xibyte@gmail.com>
Date: Thu, 6 Sep 2018 17:51:29 -0700
Subject: [PATCH] math for supporting datums

---
 web/app/brep/geom/pointOnSurface.js  | 50 ++++++++++++++++++++++++++++
 web/app/cad/model/mdatum.js          | 13 ++++++++
 web/app/cad/scene/views/datumView.js | 31 +++++++++++++++++
 web/app/math/csys.js                 | 40 ++++++++++++++++++++++
 4 files changed, 134 insertions(+)
 create mode 100644 web/app/brep/geom/pointOnSurface.js
 create mode 100644 web/app/cad/model/mdatum.js
 create mode 100644 web/app/cad/scene/views/datumView.js
 create mode 100644 web/app/math/csys.js

diff --git a/web/app/brep/geom/pointOnSurface.js b/web/app/brep/geom/pointOnSurface.js
new file mode 100644
index 00000000..c2e2c89f
--- /dev/null
+++ b/web/app/brep/geom/pointOnSurface.js
@@ -0,0 +1,50 @@
+export class PointOnSurface {
+
+  static from(surface, u, v) {
+    return new PointOnSurface(surface, [u, v], undefined);
+  }
+
+  static fromUV(surface, u, v) {
+    return new PointOnSurface(surface, [u, v], undefined);
+  }
+  
+  constructor(surface, uv, xyz) {
+    this.surface = surface;
+    this._uv = uv;
+    this._xyz = xyz;
+  }
+
+  get uv() {
+    if (this._uv) {
+      this._uv = this.surface.param(this._xyz);
+    }
+    return this._uv;
+  }
+  
+  get xyz() {
+    if (this._xyz) {
+      this._xyz = this.surface.point(this._uv);
+    }
+    return this._xyz;
+  }
+
+  get u() {
+    return this.uv[0];
+  }
+
+  get v() {
+    return this.uv[1];
+  }
+
+  get x() {
+    return this.xyz[0];
+  }
+
+  get y() {
+    return this.xyz[1];
+  }
+
+  get z() {
+    return this.xyz[2];
+  }
+}
\ No newline at end of file
diff --git a/web/app/cad/model/mdatum.js b/web/app/cad/model/mdatum.js
new file mode 100644
index 00000000..821beaad
--- /dev/null
+++ b/web/app/cad/model/mdatum.js
@@ -0,0 +1,13 @@
+import {MObject} from './mobject';
+
+export class MDatum extends MObject {
+
+  static TYPE = 'datum';
+  static ID_COUNTER = 0;
+  
+  constructor(csys) {
+    super();
+    this.id = 'D:' + (MDatum.ID_COUNTER++);
+    this.csys = csys;
+  }
+}
\ No newline at end of file
diff --git a/web/app/cad/scene/views/datumView.js b/web/app/cad/scene/views/datumView.js
new file mode 100644
index 00000000..bc585596
--- /dev/null
+++ b/web/app/cad/scene/views/datumView.js
@@ -0,0 +1,31 @@
+import {View} from './view';
+import * as SceneGraph from '../../../../../modules/scene/sceneGraph';
+import {createArrow} from '../../../../../modules/scene/objects/auxiliary';
+import {moveObject3D} from '../../../../../modules/scene/objects/transform';
+import {AXIS} from '../../../math/l3space';
+
+export default class DatumView extends View {
+
+  constructor(edge) {
+    super(edge);
+    this.rootGroup = SceneGraph.createGroup();
+  }
+  
+  setUpAxises() {
+    let arrowLength = 100;
+    let createAxisArrow = createArrow.bind(null, arrowLength, 5, 2);
+    let addAxis = (axis, color) => {
+      let arrow = createAxisArrow(axis, color, 0.2);
+      moveObject3D(arrow, axis.scale(-arrowLength * 0.5));
+      SceneGraph.addToGroup(this.auxGroup, arrow);
+    };
+    addAxis(AXIS.X, 0xFF0000);
+    addAxis(AXIS.Y, 0x00FF00);
+    addAxis(AXIS.Z, 0x0000FF);
+  }
+
+
+  dispose() {
+    
+  }
+}
\ No newline at end of file
diff --git a/web/app/math/csys.js b/web/app/math/csys.js
new file mode 100644
index 00000000..57e58962
--- /dev/null
+++ b/web/app/math/csys.js
@@ -0,0 +1,40 @@
+import {AXIS, Matrix3, ORIGIN} from './l3space';
+
+export default class CSys {
+  
+  static fromNormalAndDir(origin, normal, dir) {
+    return new CSys(origin, dir, normal.cross(dir), normal)  
+  }
+  
+  constructor(origin, x, y, z) {
+    this.origin = origin;
+    this.x = x;
+    this.y = y;
+    this.z = z;
+  }
+  
+  get inTransformation() {
+    if (!this._inTr) {
+      const basis = new Matrix3().setBasis([this.x, this.y, this.z]);
+      const translate = new Matrix3();
+      translate.tx = this.origin.x;
+      translate.ty = this.origin.y;
+      translate.tz = this.origin.z;
+      this._inTr = basis.combine(translate);
+    }
+    return this._inTr;
+  }
+
+  get outTransformation() {
+    if (!this._outTr) {
+      this._outTr = this.inTransformation().invert();
+    }
+    return this._outTr;
+  }
+  
+  copy() {
+    return CSys(this.origin, this.x, this.y, this.z);
+  }
+}
+
+CSys.ORIGIN = new CSys(ORIGIN, AXIS.X, AXIS.Y, AXIS.Z);