Example usage for org.lwjgl.opengl GL11 glClearColor

Introduction

In this page you can find the example usage for org.lwjgl.opengl GL11 glClearColor.

Prototype

public static void glClearColor(@NativeType("GLfloat") float red, @NativeType("GLfloat") float green,
        @NativeType("GLfloat") float blue, @NativeType("GLfloat") float alpha) 

Source Link

Document

Sets the clear value for fixed-point and floating-point color buffers in RGBA mode.

Usage

From source file:fr.guillaume.prive.viper.core.graphic.GraphicMotor.java

private static void setupOpenGL() {
    try {/*  w  ww .  j  a v  a2  s.c o m*/
        PixelFormat pixelFormat = new PixelFormat();
        ContextAttribs contextAtrributes = new ContextAttribs(3, 2).withForwardCompatible(true)
                .withProfileCore(true);
        Display.setDisplayMode(new DisplayMode(SCREEN_WIDTH, SCREEN_HEIGHT));
        Display.setTitle(WINDOW_NAME);
        Display.create(pixelFormat, contextAtrributes);
    } catch (LWJGLException e) {
        throw new IllegalStateException("OpenGL init error", e);
    }

    GL11.glClearColor(0f, 0f, 0f, 0f);
    GL11.glViewport(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);

    GL11.glEnable(GL11.GL_DEPTH_TEST);
    GL11.glEnable(GL11.GL_BLEND);
}

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From source file:fr.ign.cogit.geoxygene.appli.render.LwjglLayerRenderer.java

License:Open Source License

/**
 * Initialize layer FBO to receive GL primitives from a set of identical
 * symbolizers// www . jav  a  2  s.co  m
 * 
 * @param primitive
 * @param opacity
 * @param currentSymbolizer
 * @throws GLException
 */
private void clearFBOLayer() throws GLException {
    GLTools.glCheckError("preparing next FBO Layer");
    GL30.glBindFramebuffer(GL30.GL_DRAW_FRAMEBUFFER, this.getLayerViewPanel().getGLCanvas().getFboId());
    GL11.glDrawBuffer(GL30.GL_COLOR_ATTACHMENT0);

    GLTools.glCheckError("bind frame buffer");

    // Blending mode in FBO drawing.
    GLTools.glCheckError("finalizing FBO initialization");
    GL11.glClearColor(0f, 0f, 0f, 0f);
    GLTools.glCheckError("finalizing FBO initialization");
    GL11.glClear(GL11.GL_COLOR_BUFFER_BIT);

    GLTools.glCheckError("finalizing FBO initialization");
    glEnable(GL11.GL_BLEND);
    GLTools.glCheckError("finalizing FBO initialization");
    GL20.glBlendEquationSeparate(GL14.GL_FUNC_ADD, GL14.GL_MAX);
    GLTools.glCheckError("finalizing FBO initialization");
    GL14.glBlendFuncSeparate(GL11.GL_ONE, GL11.GL_ZERO, GL11.GL_ZERO, GL11.GL_ZERO);
    GL30.glBindFramebuffer(GL30.GL_DRAW_FRAMEBUFFER, 0);
    GLTools.glCheckError("finalizing FBO initialization");
}

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From source file:fr.ign.cogit.geoxygene.util.gl.GLTools.java

License:Open Source License

/**
 * set gl clear color from a LWJGL Color object
 *//*from   ww w. j av a2s.co  m*/
public static void glClear(final Color color, int bufferId) {
    GL11.glClearColor(color.getRed() / 255f, color.getGreen() / 255f, color.getBlue() / 255f,
            color.getAlpha() / 255f);
    GL11.glClear(bufferId);
}

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From source file:fr.ign.cogit.geoxygene.util.gl.GLTools.java

License:Open Source License

/**
 * set gl clear color from an AWT Color object
 *//*ww w.  j a va2 s .c  o m*/
public static void glClear(final java.awt.Color color, int bufferId) {
    GL11.glClearColor(color.getRed() / 255f, color.getGreen() / 255f, color.getBlue() / 255f,
            color.getAlpha() / 255f);
    GL11.glClear(bufferId);
}

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From source file:fr.ign.cogit.geoxygene.util.gl.GLTools.java

License:Open Source License

/**
 * set gl clear color from RGBA components
 *//*from w  ww.  j  a va  2s .  c  o m*/
public static void glClear(float r, float g, float b, float a, int bufferId) {
    GL11.glClearColor(r, g, b, a);
    GL11.glClear(bufferId);
}

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From source file:fr.theshark34.sharkengine.Game.java

License:Apache License

/**
 * Update the window, called by the main loop of the create() method
 *///from   w w  w.j  a  va  2  s  . c  o  m
private static void update() {
    // Clear all
    GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
    GL11.glClearColor((float) clearColor.getRed() / 255, (float) clearColor.getGreen() / 255,
            (float) clearColor.getBlue() / 255, (float) clearColor.getAlpha() / 255);

    // Draw the current GUI
    if (currentGUI != null)
        currentGUI.draw();

    // Check if user requested close
    if (Display.isCloseRequested())
        stop();

    // Update the Display
    Display.update();
}

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From source file:game.engine.game.Scene.java

License:Open Source License

/**
 * Draws the screen contents using OpenGL.
 *///ww w.j a  v  a 2s.c  om
public void draw() {
    GL11.glMatrixMode(GL11.GL_PROJECTION);
    GL11.glLoadIdentity();
    GL11.glOrtho(0, getScreenWidthUnits(), getScreenHeightUnits(), 0, -1, 1);
    GL11.glMatrixMode(GL11.GL_MODELVIEW);
    GL11.glLoadIdentity();
    GL11.glTranslatef(-screenX, -screenY, 0.0f);
    GL11.glEnable(GL11.GL_BLEND);
    GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
    GL11.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
    GL11.glClear(GL11.GL_COLOR_BUFFER_BIT);
    for (GameObject gameObject : gameObjects) {
        gameObject.draw();
    }
}

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From source file:geh.Geh.java

public void initGL() {
    try {//ww  w .j a v  a 2  s.  c o m
        Display.setDisplayMode(new DisplayMode(WIDTH, HEIGHT));
        Display.create();
    } catch (LWJGLException ex) {
        ex.printStackTrace();
        System.exit(0);
    }
    Mouse.setGrabbed(false);
    GL11.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
    GL11.glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glOrtho(0.0, WIDTH, HEIGHT, 0.0, -1.0, 10.0);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();

}

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From source file:hexagonalminesweeper.HexagonalMinesweeper.java

public static void renderGL() {
    try {//w  ww.j a  v  a2s  . c om
        Display.setDisplayMode(new org.lwjgl.opengl.DisplayMode(800, 600));
        Display.create();
    } catch (LWJGLException e) {
        e.printStackTrace();
        System.exit(0);
    }

    GL11.glEnable(GL11.GL_TEXTURE_2D);
    GL11.glShadeModel(GL11.GL_SMOOTH);
    GL11.glDisable(GL11.GL_DEPTH_TEST);
    GL11.glDisable(GL11.GL_LIGHTING);

    GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
    GL11.glClearDepth(1);

    GL11.glEnable(GL11.GL_BLEND);
    GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);

    GL11.glViewport(0, 0, 800, 600);
    GL11.glMatrixMode(GL11.GL_MODELVIEW);

    GL11.glMatrixMode(GL11.GL_PROJECTION);
    GL11.glLoadIdentity();
    GL11.glOrtho(0, 800, 600, 0, 1, -1);
    GL11.glMatrixMode(GL11.GL_MODELVIEW);

    Display.setVSyncEnabled(true);
}

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From source file:illarion.graphics.lwjgl.RenderDisplayLWJGL.java

License:Open Source License

/**
 * Setup the openGL render environment. Such as the view port the matrix for
 * the orthogonal view and so on.//from  w  w  w  . j  a v a2s .co  m
 */
protected void setupOpenGL() {
    if (!Display.isCreated()) {
        return;
    }

    // set the basic view port of the game. This should be the full size of
    // the client window
    GL11.glViewport(0, 0, resWidth, resHeight);

    // enable alpha blending based on the picture alpha channel
    GL11.glEnable(GL11.GL_BLEND);
    GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);

    // disable death test, we work in 2D anyway, there is no depth
    GL11.glDisable(GL11.GL_DEPTH_TEST);

    // switch to projection matrix to set up the orthogonal view that we
    // need
    GL11.glMatrixMode(GL11.GL_PROJECTION);

    // load the identity matrix to we have a clean start
    GL11.glLoadIdentity();

    // setup the orthogonal view
    GLU.gluOrtho2D(0, resWidth, 0, resHeight);

    // set clear color to black
    GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);

    // sync frame (only works on windows)
    if (Graphics.NO_SLOWDOWN) {
        Display.setVSyncEnabled(false);
    } else {
        Display.setVSyncEnabled(true);
    }

    // clean up the screen
    GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);

    // switch to model view matrix, so we can place the sprites correctly
    GL11.glMatrixMode(GL11.GL_MODELVIEW);
    GL11.glLoadIdentity();
}

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