com.adavr.player.globjects.VertexArray.java Source code

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Here is the source code for com.adavr.player.globjects.VertexArray.java

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/*
 * Copyright (C) 2015 Shotaro Uchida <fantom@xmaker.mx>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.adavr.player.globjects;

import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.GL20;
import org.lwjgl.opengl.GL30;

/**
 *
 * @author Shotaro Uchida <fantom@xmaker.mx>
 */
public class VertexArray extends GLObject {

    private int currentAttribIndex = 0;
    private int currentAttribOffset = 0;

    private VertexArray(int id) {
        super(id);
    }

    public static VertexArray create() {
        int id = GL30.glGenVertexArrays();
        return new VertexArray(id);
    }

    public static void bind(VertexArray va) {
        GL30.glBindVertexArray(va.id);
    }

    public static void unbind() {
        GL30.glBindVertexArray(0);
    }

    public int addAtrribute(int size, int stride) {
        int index = currentAttribIndex;
        GL20.glVertexAttribPointer(index, size, GL11.GL_FLOAT, false, stride, currentAttribOffset);
        currentAttribIndex++;
        currentAttribOffset += size * 4;
        return index;
    }

    public void enableAttributes() {
        for (int index = 0; index < currentAttribIndex; index++) {
            GL20.glEnableVertexAttribArray(index);
        }
    }

    public void disableAttributes() {
        for (int index = 0; index < currentAttribIndex; index++) {
            GL20.glDisableVertexAttribArray(index);
        }
    }

    @Override
    public void destroy() {
        GL30.glDeleteVertexArrays(id);
    }
}