Press n or j to go to the next uncovered block, b, p or k for the previous block.
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| Title: PolyhedronElement.ts |
| A port of the software Geometry Applet by |
| Author: David E. Joyce |
| Department of Mathematics and Computer Science |
| Clark University |
| Worcester, MA 01610-1477 |
| U.S.A. |
| |
| http://aleph0.clarku.edu/~djoyce/home.html |
| djoyce@clarku.edu |
| |
| Date: May, 1997. |
| TypeScript Port: 2026, Nelson Brown, brownnrl@gmail.com |
| https://www.nelsonbrown.net/ |
+----------------------------------------------------------------------*/
import {GeomElement} from "../GeomElement";
import {PolygonElement} from "../polygon/PolygonElement";
import {PointElement} from "../point/PointElement";
import {SlateCanvas} from "../../Slate";
export class PolyhedronElement extends GeomElement {
public P: PolygonElement[]; // array of face polygons
constructor() {
super();
this.dimension = 2;
this.P = [];
}
public defined(): boolean {
for (let i = 0; i < this.P.length; ++i) {
if (!this.P[i].defined()) return false;
}
return true;
}
public drawName(c: SlateCanvas): void {
if (this.nameColor != null && this.name != null && this.defined()) {
let x = 0, y = 0, ct = 0;
for (let j = 0; j < this.P.length; ++j) {
for (let i = 0; i < this.P[j].V.length; ++i) {
x += this.P[j].V[i].x;
y += this.P[j].V[i].y;
++ct;
}
}
x /= ct;
y /= ct;
this.drawString(Math.round(x), Math.round(y), c);
}
}
public drawVertex(c: SlateCanvas): void {
if (this.vertexColor != null && this.defined()) {
for (let j = 0; j < this.P.length; ++j) {
for (let i = 0; i < this.P[j].V.length; ++i) {
this.P[j].V[i].drawVertex(c, this.vertexColor);
}
}
}
}
public drawEdge(c: SlateCanvas): void {
if (this.edgeColor != null && this.defined()) {
let ctx = c.getContext("2d") as CanvasRenderingContext2D;
ctx.strokeStyle = this.edgeColor;
for (let j = 0; j < this.P.length; ++j) {
for (let i = 0; i < this.P[j].V.length; ++i) {
let a = this.P[j].V[i];
let b = this.P[j].V[(i + 1) % this.P[j].V.length];
ctx.beginPath();
ctx.moveTo(a.x, a.y);
ctx.lineTo(b.x, b.y);
ctx.stroke();
}
}
}
}
public drawFace(c: SlateCanvas): void {
if (this.faceColor != null && this.defined()) {
for (let j = 0; j < this.P.length; ++j) {
// Pass the polyhedron's faceColor to each face polygon,
// matching Java's P[j].drawFace(g, faceColor)
let savedColor = this.P[j].faceColor;
this.P[j].faceColor = this.faceColor;
this.P[j].drawFace(c);
this.P[j].faceColor = savedColor;
}
}
}
public update(): void {}
public translate(dx: number, dy: number): void {}
public rotate(pivot: PointElement, ac: number, as: number): void {}
}
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