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3D rendering engine. Plus modeling. Expected glsl textures 3d and 2d rendering
There is a newer version: 2024.5.10
/*
 * Copyright (c) 2023. Manuel Daniel Dahmen
 *
 *
 *    Copyright 2012-2023 Manuel Daniel Dahmen
 *
 *    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.
 */

package one.empty3.library;

import one.empty3.library.core.nurbs.ParametricSurface;
import one.empty3.library.core.nurbs.Point2Point;


public class Sphere extends ParametricSurface {
    protected StructureMatrix circle = new StructureMatrix<>(0, Circle.class);

    public Sphere() {
        super();
        circle.setElem(new Circle());


    }

    public Sphere(Axe axis, double radius) {
        this();
        circle.setElem(new Circle(axis, radius));
    }

    public Sphere(Point3D center, double radius) {
        this();
        getCircle().getAxis().setElem(new Axe(center.plus(Point3D.Y.mult(radius)), center.plus(Point3D.Y.mult(-radius))));
        getCircle().setRadius(radius);

    }
    {
        terminalU.setElem(new Point2Point() {
            @Override
            public Point3D result(Point3D p) {
                return new Point3D(1.0, p.get(1), p.get(2));
            }
        });
        terminalV.setElem(new Point2Point() {
            @Override
            public Point3D result(Point3D p) {
                return new Point3D(p.get(0), 1.0, 0.0);
            }
        });

    }
    public Point3D calculerPoint3D(double u, double v) {
        for (Point3D point3D : getCircle().vectors.data1d) {
            if (point3D == null)
                return Point3D.O0;
        }
        Circle c = getCircle();
        if (!c.isCalculerRepere1()) {
            c.calculerRepere1();
        }
        double cos = Math.cos(-Math.PI / 2 + Math.PI * v);
        Point3D multi = getVectX().mult(
                        Math.cos(2.0 * Math.PI * u) * cos).plus(
                        getVectY().mult(
                                Math.sin(2.0 * Math.PI * u) * cos))
                .plus(getVectZ().mult(Math.sin(-Math.PI / 2 + Math.PI * v)));
        if (multi.norme() <= Double.MIN_VALUE) {
            return c.getCenter();
        } else
            return c.getCenter().plus(multi.norme1().mult(c.radius.getElem()));
    }

    public Circle getCircle() {
        return circle.getElem();
    }

    public void setCircle(Circle circle) {
        this.circle.setElem(circle);
    }

    @Override
    public void declareProperties() {
        super.declareProperties();
        getDeclaredDataStructure().put("circle/circle", circle);

    }

    @Override
    public String toString() {
        return "sphere (\n\t" + circle.toString() + "\n\t" + texture.toString() + "\n)\t";
    }
}