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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) 2022-2023. 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.feature;

import one.empty3.feature.app.replace.javax.imageio.ImageIO;
import one.empty3.io.ProcessFile;

import java.io.File;
import java.io.IOException;
import java.util.Objects;

/*
sobel. 3×3 ou plus. 1*2+1
|p1 -p2| (/ n/n)?
*/
public class SobelDerivative extends ProcessFile {
    private final boolean isX;
    private int lines = 3;
    private int columns = 3;
    double[] sobelX = new double[]{-1, -2, -1, 0, 0, 0
            , 1, 2, 1};
    double[] sobelY = new double[]{-1, 0, -1,
            -2, 0, 2
            , 1, 0, 1};

    public SobelDerivative() {
        this.isX = true;
    }

    private void fill() {

    }

    public double x(int i, int j) {
        return sobelX[i * lines + j];
    }

    public double y(int i, int j) {
        return sobelY[i * lines + j];
    }

    public void theta(int i, int j) {

    }

    public double filter(PixM p, int x, int y) {
        int dy = (int) (lines / 2);
        int dX = (int) (columns / 2);
        double sumX = 0, sumY = 0;
        for (int c = 0; c < 3; c++) {
            for (int l = 0; l < 3; l++) {
                sumX += sobelX[l * columns + c] * p.get(x + c - 1, y + l - 1);
                sumY += sobelY[l * columns + c] * p.get(x + c - 1, y + l - 1);
            }
        }
        return Math.sqrt(sumX * sumX + sumY * sumY);
    }

    @Override
    public boolean process(File in, File out) {
        try {
            PixM p = PixM.getPixM(Objects.requireNonNull(ImageIO.read(in)), maxRes);
            PixM pOut = p.copy();
            for (int j = 0; j < p.getLines(); j++) {
                for (int i = 0; i < p.getColumns(); i++) {
                    for (int c = 0; c < 3; c++) {
                        p.setCompNo(c);
                        pOut.setCompNo(c);
                        double filter = filter(p, i, j);
                        pOut.set(i, j, filter);
                    }
                }
            }
            ImageIO.write(pOut.normalize(0, 1).getImage(), "jpg", out);
            return true;
        } catch (Exception ex) {}

        return false;
    }
}