com.opengrave.og.light.Texture2DShadowMap.java Source code

Introduction

Here is the source code for com.opengrave.og.light.Texture2DShadowMap.java

Source

/*
 * Copyright 2016 Nathan Howard
 * 
 * This file is part of OpenGrave
 * 
 * OpenGrave 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.
 * 
 * OpenGrave 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 OpenGrave. If not, see <http://www.gnu.org/licenses/>.
 */
package com.opengrave.og.light;

import java.nio.FloatBuffer;

import org.lwjgl.opengl.*;

import com.opengrave.og.Util;
import com.opengrave.og.resources.Texture;

public class Texture2DShadowMap implements Texture {

    int texture = 0;
    // int texture2 = 0;
    int lastTexNum = 0;

    public Texture2DShadowMap(int size) {
        texture = GL11.glGenTextures();
        GL11.glBindTexture(GL11.GL_TEXTURE_2D, texture);
        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_LINEAR);
        Util.checkErr();
        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR);
        Util.checkErr();
        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL12.GL_CLAMP_TO_EDGE);
        Util.checkErr();
        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, GL12.GL_CLAMP_TO_EDGE);
        Util.checkErr();
        // GL11.glTexParameteri(GL11.GL_TEXTURE_2D,
        // GL14.GL_TEXTURE_COMPARE_FUNC, GL11.GL_LEQUAL);
        // GL11.glTexParameteri(GL11.GL_TEXTURE_2D,
        // GL14.GL_TEXTURE_COMPARE_MODE,
        // GL30.GL_COMPARE_REF_TO_TEXTURE);
        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL14.GL_TEXTURE_COMPARE_MODE, GL11.GL_NONE);
        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL14.GL_DEPTH_TEXTURE_MODE, GL11.GL_INTENSITY);
        GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, GL11.GL_DEPTH_COMPONENT, size, size, 0, GL11.GL_DEPTH_COMPONENT,
                GL11.GL_FLOAT, (FloatBuffer) null);
        Util.checkErr();
        GL11.glBindTexture(GL11.GL_TEXTURE_2D, 0);

        // texture2 = GL11.glGenTextures();
        // GL11.glBindTexture(GL11.GL_TEXTURE_2D, texture2);
        // GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0,GL11.GL_RGB, size, size,
        // 0,GL11.GL_RGB, GL11.GL_UNSIGNED_BYTE, (FloatBuffer)null);
        // GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER,
        // GL11.GL_NEAREST);
        // GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER,
        // GL11.GL_NEAREST);
        // GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S,
        // GL12.GL_CLAMP_TO_EDGE);
        // GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T,
        // GL12.GL_CLAMP_TO_EDGE);
        // GL11.glBindTexture(GL11.GL_TEXTURE_2D, 0);

    }

    public void bindToFrameBuffer() {
        GL30.glFramebufferTexture2D(GL30.GL_FRAMEBUFFER, GL30.GL_DEPTH_ATTACHMENT, GL11.GL_TEXTURE_2D, texture, 0);
        Util.checkErr();
        // GL30.glFramebufferTexture2D(GL30.GL_FRAMEBUFFER,
        // GL30.GL_COLOR_ATTACHMENT0, GL11.GL_TEXTURE_2D, texture2, 0);
        // Util.checkErr();

    }

    @Override
    public int getTextureType() {
        return GL11.GL_TEXTURE_2D;
    }

    @Override
    public void bind(int t) {
        lastTexNum = t;
        GL13.glActiveTexture(t);
        GL11.glBindTexture(getTextureType(), texture);
    }

    @Override
    public void unbind() {
        GL13.glActiveTexture(lastTexNum);
        GL11.glBindTexture(getTextureType(), 0);
    }

    @Override
    public boolean isValid() {
        return true;
    }

}