com.xrbpowered.gl.examples.GLPerlin.java Source code

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Here is the source code for com.xrbpowered.gl.examples.GLPerlin.java

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/*******************************************************************************
 * MIT License
 *
 * Copyright (c) 2017 Ashur Rafiev
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *******************************************************************************/
package com.xrbpowered.gl.examples;

import org.lwjgl.opengl.GL20;

import com.xrbpowered.gl.res.buffers.OffscreenBuffers;
import com.xrbpowered.gl.res.buffers.RenderTarget;
import com.xrbpowered.gl.res.shaders.PostProcessShader;
import com.xrbpowered.utils.assets.AssetManager;
import com.xrbpowered.utils.assets.FileAssetManager;

public class GLPerlin extends ExampleClient {

    private OffscreenBuffers buffer = null;

    private PostProcessShader shader;

    private float pivotx = 123f;
    private float pivoty = 345f;
    private int seed = 0;

    public GLPerlin() {
        settings.multisample = 0;
        AssetManager.defaultAssets = new FileAssetManager("assets", AssetManager.defaultAssets);
        init("Perlin Noise").run();
    }

    @Override
    protected String getHelpString() {
        return formatHelpOnKeys(new String[] { "<b>F1</b>|Toggle FPS limit and VSync", });
    }

    @Override
    protected void setupResources() {
        super.setupResources();
        shader = new PostProcessShader("post_noise_f.glsl") {
            private int pivotLocation;
            private int scaleLocation;
            private int seedLocation;

            @Override
            protected void storeUniformLocations() {
                super.storeUniformLocations();
                pivotLocation = GL20.glGetUniformLocation(pId, "pivot");
                scaleLocation = GL20.glGetUniformLocation(pId, "scale");
                seedLocation = GL20.glGetUniformLocation(pId, "seed");
                GL20.glUseProgram(pId);
                GL20.glUniform1i(GL20.glGetUniformLocation(pId, "palette"), 0);
                GL20.glUseProgram(0);
            }

            @Override
            public void updateUniforms() {
                super.updateUniforms();
                GL20.glUniform2f(pivotLocation, pivotx, pivoty);
                GL20.glUniform2f(scaleLocation, buffer.getWidth() / 2, buffer.getHeight() / 2);
                GL20.glUniform1i(seedLocation, seed);
            }
        };
        resetBuffer();
    }

    private void resetBuffer() {
        if (buffer != null)
            buffer.destroy();
        buffer = new OffscreenBuffers(getTargetWidth(), getTargetHeight(), false);
    }

    @Override
    protected void resizeResources() {
        super.resizeResources();
        resetBuffer();
    }

    @Override
    protected void destroyResources() {
        super.destroyResources();
        shader.destroy();
    }

    @Override
    public void updateTime(float dt) {
        pivoty += 20f * dt;
        pivotx += 30f * dt;
    }

    @Override
    protected void drawObjects(RenderTarget target) {
        buffer.use();
        shader.draw(null);
        OffscreenBuffers.blit(buffer, target, true);
    }

    public static void main(String[] args) {
        new GLPerlin();
    }

}