Java Code Examples for org.lwjgl.opengl.GL11

/**
 * Render a single character with the default.png font at current (posX,posY) location...
 */
private float renderDefaultChar(int p_78266_1_, boolean p_78266_2_)
{
    int i = p_78266_1_ % 16 * 8;
    int j = p_78266_1_ / 16 * 8;
    int k = p_78266_2_ ? 1 : 0;
    this.bindTexture(this.locationFontTexture);
    float f = this.charWidth[p_78266_1_];
    float f1 = 7.99F;
    GL11.glBegin(GL11.GL_TRIANGLE_STRIP);
    GL11.glTexCoord2f((float)i / 128.0F, (float)j / 128.0F);
    GL11.glVertex3f(this.posX + (float)k, this.posY, 0.0F);
    GL11.glTexCoord2f((float)i / 128.0F, ((float)j + 7.99F) / 128.0F);
    GL11.glVertex3f(this.posX - (float)k, this.posY + 7.99F, 0.0F);
    GL11.glTexCoord2f(((float)i + f1 - 1.0F) / 128.0F, (float)j / 128.0F);
    GL11.glVertex3f(this.posX + f1 - 1.0F + (float)k, this.posY, 0.0F);
    GL11.glTexCoord2f(((float)i + f1 - 1.0F) / 128.0F, ((float)j + 7.99F) / 128.0F);
    GL11.glVertex3f(this.posX + f1 - 1.0F - (float)k, this.posY + 7.99F, 0.0F);
    GL11.glEnd();
    return f;
}
 

@Override
public void render() {
    FMLClientHandler.instance().getClient().getTextureManager().bindTexture(getTexture());
    int width = getWidth() + (getParameters() != null && getParameters().length > 0 ? 10 : 0);
    int height = getHeight() + (hasStepOutput() ? 10 : 0);
    Pair<Double, Double> maxUV = getMaxUV();
    double u = maxUV.getLeft();
    double v = maxUV.getRight();
    BufferBuilder wr = Tessellator.getInstance().getBuffer();
    wr.begin(GL11.GL_QUADS, DefaultVertexFormats.POSITION_TEX);
    wr.pos(0, 0, 0).tex(0, 0).endVertex();
    wr.pos(0, height, 0).tex(0, v).endVertex();
    wr.pos(width, height, 0).tex(u, v).endVertex();
    wr.pos(width, 0, 0).tex(u, 0).endVertex();
    Tessellator.getInstance().draw();
}
 

@Override
public void render(SemiBlockCropSupport semiBlock, float partialTick) {
    GL11.glPushMatrix();
    Minecraft.getMinecraft().renderEngine.bindTexture(Textures.MODEL_HEAT_FRAME);

    double brightness = 0.2;
    GL11.glColor4d(brightness, brightness, brightness, 1);

    AxisAlignedBB aabb = new AxisAlignedBB(3 / 16D, -6 / 16D, 3 / 16D, 13 / 16D, 17 / 16D, 13 / 16D);
   
    GL11.glTranslated(aabb.minX, aabb.minY, aabb.minZ);
    GL11.glScaled(aabb.maxX - aabb.minX, aabb.maxY - aabb.minY, aabb.maxZ - aabb.minZ);
    GL11.glTranslated(0.5, -0.5, 0.5);
    model.render(null, 0, 0, 0, 0, 0, 1 / 16F);
    GL11.glPopMatrix();
    GL11.glColor4d(1, 1, 1, 1);
}
 

@SideOnly(Side.CLIENT)
private static final void renderTieBottom(float width){
	GL11.glTexCoord2f(tieTopMinU, tieTopMinV);
	GL11.glNormal3f(0, 1, 0);
	GL11.glVertex3f(width/2, 0, length/2);

	GL11.glTexCoord2f(tieTopMaxU, tieTopMinV);
	GL11.glNormal3f(0, 1, 0);
	GL11.glVertex3f(-width/2, 0, length/2);

	GL11.glTexCoord2f(tieTopMaxU, tieTopMaxV);
	GL11.glNormal3f(0, 1, 0);
	GL11.glVertex3f(-width/2, 0, -length/2);

	GL11.glTexCoord2f(tieTopMinU, tieTopMaxV);
	GL11.glNormal3f(0, 1, 0);
	GL11.glVertex3f(width/2, 0, -length/2);
}
 

public static void emptyBlockESPBox(BlockPos blockPos) {
	double x = blockPos.getX() - Minecraft.getMinecraft().getRenderManager().renderPosX;
	double y = blockPos.getY() - Minecraft.getMinecraft().getRenderManager().renderPosY;
	double z = blockPos.getZ() - Minecraft.getMinecraft().getRenderManager().renderPosZ;
	GL11.glBlendFunc(770, 771);
	GL11.glEnable(GL_BLEND);
	GL11.glLineWidth(2.0F);
	GL11.glDisable(GL11.GL_TEXTURE_2D);
	GL11.glDisable(GL_DEPTH_TEST);
	GL11.glDepthMask(false);
	GL11.glColor4d(0, 0, 0, 0.5F);
	drawSelectionBoundingBox(new AxisAlignedBB(x, y, z, x + 1.0, y + 1.0, z + 1.0));
	GL11.glEnable(GL11.GL_TEXTURE_2D);
	GL11.glEnable(GL_DEPTH_TEST);
	GL11.glDepthMask(true);
	GL11.glDisable(GL_BLEND);
}
 

@Override
protected void drawGuiContainerBackgroundLayer(float partialTicks, int mouseX, int mouseY)
{
    if (content.bg != null)
    {
        mc.getTextureManager().bindTexture(content.bg);
        int x = (width - xSize) / 2;
        int y = (height - ySize) / 2;
        drawTexturedModalRect(x, y, content.bgTexX, content.bgTexY, xSize, ySize);

        GL11.glPushMatrix();
        GL11.glTranslatef(x, y, 0f);
        for (ProgressBar bar : content.progressBars)
        {
            bar.draw(progressBarSource);
        }
        GL11.glPopMatrix();
    }
}
 

@Override
public void draw() {
	
	super.draw();
	
	TextureManager render = mc.renderEngine;
	render.bindTexture(resource);
	
	GlStateManager.enableBlend();
	GlStateManager.blendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
	GlStateManager.color(1F, 1F, 1F, 1F);
	int k = (gui.width - gui.WIDTH) / 2;
	gui.drawTexturedModalRect(k + 5, 5, 0, 0, gui.WIDTH, gui.HEIGHT);
	gui.drawCenteredString(mc.fontRendererObj, text, drawX + 60, drawY + 150, Color.gray.getRGB());
	GlStateManager.disableBlend();
}
 

@Override
protected void onWorldDraw(float delta, float x, float y, float z) {
    float mx, my, mz;
    if (!safeShow) return;
    if (--safeUpdate < 0) {
        safeUpdate = 13;
        reCheckSafe(fix(x), fix(y), fix(z));
    }
    if (safeGhost) GL11.glDisable(GL11.GL_DEPTH_TEST);
    else           GL11.glEnable( GL11.GL_DEPTH_TEST);
    GL11.glDisable(GL11.GL_TEXTURE_2D);
    GL11.glDisable(GL11.GL_BLEND);
    GL11.glDisable(GL11.GL_FOG);
    GL11.glBegin(GL11.GL_LINES);
    for (int i = 0; i < safeCur; ++i) {
        Vec3i pos   = safePoses[i];
        Color color = safeMarks[i];
        GL11.glColor3ub(color.rb, color.gb, color.bb);
        mx = pos.getX() - x; my = pos.getY() - y; mz = pos.getZ() - z;
        GL11.glVertex3f(mx+0.9f,my+0.01f,mz+0.9f);
        GL11.glVertex3f(mx+0.1f,my+0.01f,mz+0.1f);
        GL11.glVertex3f(mx+0.9f,my+0.01f,mz+0.1f);
        GL11.glVertex3f(mx+0.1f,my+0.01f,mz+0.9f);
    }
    GL11.glEnd();
}
 

@Override
protected void onControllerDrag()
{
	Part part = selectedPart;
	if(part instanceof PartObj || part instanceof PartRotation)
		super.onControllerDrag();
	else
	{
		GL11.glPushMatrix();
		if(part instanceof PartEntityPos)
			GL11.glTranslated(-entityToRender.posX, -entityToRender.posY, -entityToRender.posZ);
		int i = translationAxisPlane == 0 ? 2 : translationAxisPlane - 1;
		translationGuidePoint = getMouseVectorInPlane(i);
		processAxisDrag();
		GL11.glPopMatrix();
	}
}
 

public VBO updateData(IntBuffer buffer, long offset)
{
	if (this.type != GL11.GL_UNSIGNED_INT)
	{
		throw new IllegalArgumentException("Cannot store mismatching type in buffer!");
	}

	if (offset + buffer.limit() > this.length)
	{
		int usage = GL15.glGetBufferParameteri(this.target, GL15.GL_BUFFER_USAGE);
		this.putData(buffer, this.normalized, usage);
	}

	GL15.glBindBuffer(this.target, this.handle);
	GL15.glBufferSubData(this.target, offset, buffer);

	return this;
}
 

private void setTextureParams() {
    int filterType = nearestFiltering ? GL11.GL_NEAREST : GL11.GL_LINEAR;
    GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, filterType);
    GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, filterType);
    int wrapType = clampEdges ? GL12.GL_CLAMP_TO_EDGE : GL11.GL_REPEAT;
    GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, wrapType);
    GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, wrapType);
}
 

@Override
protected void renderDynamic(float scale, float partialTicks) {
    shape1.render(scale);
    shape2.render(scale);

    float pressure = 0f;
    float dangerPressure = 5f;
    float critPressure = 7f;
    if (gaugeModule != null && gaugeModule.getTube() instanceof TileEntityPneumaticBase) {
        TileEntityPneumaticBase base = (TileEntityPneumaticBase) gaugeModule.getTube();
        pressure = base.getPressure();
        critPressure = base.criticalPressure;
        dangerPressure = base.dangerPressure;
    }
    GL11.glTranslated(0, 1, 0.378);
    double widgetScale = 0.007D;
    GL11.glScaled(widgetScale, widgetScale, widgetScale);
    GL11.glRotated(180, 0, 1, 0);
    GL11.glDisable(GL11.GL_LIGHTING);
    GuiUtils.drawPressureGauge(FMLClientHandler.instance().getClient().fontRenderer, -1, critPressure, dangerPressure, -1, pressure, 0, 0, 0);
    GL11.glEnable(GL11.GL_LIGHTING);
}
 

private void renderPumpkinBlur(int i, int j)
{
    GL11.glDisable(2929 /*GL_DEPTH_TEST*/);
    GL11.glDepthMask(false);
    GL11.glBlendFunc(770, 771);
    GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
    GL11.glDisable(3008 /*GL_ALPHA_TEST*/);
    GL11.glBindTexture(3553 /*GL_TEXTURE_2D*/, mc.renderEngine.getTexture("%blur%/misc/pumpkinblur.png"));
    Tessellator tessellator = Tessellator.instance;
    tessellator.startDrawingQuads();
    tessellator.addVertexWithUV(0.0D, j, -90D, 0.0D, 1.0D);
    tessellator.addVertexWithUV(i, j, -90D, 1.0D, 1.0D);
    tessellator.addVertexWithUV(i, 0.0D, -90D, 1.0D, 0.0D);
    tessellator.addVertexWithUV(0.0D, 0.0D, -90D, 0.0D, 0.0D);
    tessellator.draw();
    GL11.glDepthMask(true);
    GL11.glEnable(2929 /*GL_DEPTH_TEST*/);
    GL11.glEnable(3008 /*GL_ALPHA_TEST*/);
    GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
}
 

/**
 * @see org.newdawn.slick.Graphics#disable()
 */
protected void disable() {
	// Bind the texture after rendering.
	GL11.glBindTexture(GL11.GL_TEXTURE_2D, image.getTexture().getTextureID());
	GL11.glCopyTexImage2D(GL11.GL_TEXTURE_2D, 0, GL11.GL_RGBA, 0, 0, 
						  image.getTexture().getTextureWidth(), 
						  image.getTexture().getTextureHeight(), 0);
	
	try {
		Display.makeCurrent();
	} catch (LWJGLException e) {
		Log.error(e);
	}
	
	SlickCallable.leaveSafeBlock();
}
 

public static void renderGhostModel(IBakedModel model, BlockPos position, Color color, boolean noDepth, float partialTicks)
{
	GlStateManager.enableBlend();
       GL11.glBlendFunc(GL11.GL_ONE, GL11.GL_ONE_MINUS_DST_COLOR);
	BufferBuilder vb;
	if(noDepth)
	{
           GlStateManager.depthFunc(519);
		vb = prepRenderBlockDepth(partialTicks, true);
	}
	else
        vb = prepRender(partialTicks, true);
       vb.begin(7, DefaultVertexFormats.BLOCK);
       World world = Minecraft.getMinecraft().world;
       BlockRendererDispatcher dispatcher = Minecraft.getMinecraft().getBlockRendererDispatcher();
       dispatcher.getBlockModelRenderer().renderModel(world, model, Minecraft.getMinecraft().world.getBlockState(position), position.add(0, noDepth ? 500 : 0, 0), vb, false);
       for(int i = 0; i < vb.getVertexCount(); i++)
       	vb.putColorMultiplier(color.getRed() / 255f, color.getGreen() / 255f, color.getBlue() / 255f, i);
       vb.color(1, 1, 1, 0.1f);
       postRender();
       GlStateManager.depthFunc(515);
       GlStateManager.disableBlend();
}
 

public static void renderBillboardQuadWithRotation(float rot, double scale) {
    GlStateManager.pushMatrix();

    rotateToPlayer();

    GlStateManager.rotate(rot, 0, 0, 1);

    Tessellator tessellator = Tessellator.getInstance();
    VertexBuffer buffer = tessellator.getBuffer();
    buffer.begin(GL11.GL_QUADS, DefaultVertexFormats.POSITION_TEX);
    buffer.pos(-scale, -scale, 0).tex(0, 0).endVertex();
    buffer.pos(-scale, +scale, 0).tex(0, 1).endVertex();
    ;
    buffer.pos(+scale, +scale, 0).tex(1, 1).endVertex();
    ;
    buffer.pos(+scale, -scale, 0).tex(1, 0).endVertex();
    ;
    tessellator.draw();
    GlStateManager.popMatrix();
}
 

/**
 * Initialise the PBuffer that will be used to render to
 * 
 * @throws SlickException
 */
private void init() throws SlickException {
	try {
		Texture tex = InternalTextureLoader.get().createTexture(image.getWidth(), image.getHeight(), image.getFilter());
		
		final RenderTexture rt = new RenderTexture(false, true, false, false, RenderTexture.RENDER_TEXTURE_2D, 0);
		pbuffer = new Pbuffer(screenWidth, screenHeight, new PixelFormat(8, 0, 0), rt, null);

		// Initialise state of the pbuffer context.
		pbuffer.makeCurrent();

		initGL();
		GL.glBindTexture(GL11.GL_TEXTURE_2D, tex.getTextureID());
		pbuffer.releaseTexImage(Pbuffer.FRONT_LEFT_BUFFER);
		image.draw(0,0);
		image.setTexture(tex);
		
		Display.makeCurrent();
	} catch (Exception e) {
		Log.error(e);
		throw new SlickException("Failed to create PBuffer for dynamic image. OpenGL driver failure?");
	}
}
 

public void drawScreen(int i, int j, float f)
{
    drawDefaultBackground();
    Tessellator tessellator = Tessellator.instance;
    char c = '\u0112';
    int k = width / 2 - c / 2;
    byte byte0 = 30;
    GL11.glBindTexture(3553 /*GL_TEXTURE_2D*/, mc.renderEngine.getTexture("/title/mclogo.png"));
    GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
    drawTexturedModalRect(k + 0, byte0 + 0, 0, 0, 155, 44);
    drawTexturedModalRect(k + 155, byte0 + 0, 0, 45, 155, 44);
    tessellator.setColorOpaque_I(0xffffff);
    GL11.glPushMatrix();
    GL11.glTranslatef(width / 2 + 90, 70F, 0.0F);
    GL11.glRotatef(-20F, 0.0F, 0.0F, 1.0F);
    float f1 = 1.8F - MathHelper.abs(MathHelper.sin(((float)(System.currentTimeMillis() % 1000L) / 1000F) * 3.141593F * 2.0F) * 0.1F);
    f1 = (f1 * 100F) / (float)(fontRenderer.getStringWidth(splashText) + 32);
    GL11.glScalef(f1, f1, f1);
    drawCenteredString(fontRenderer, splashText, 0, -8, 0xffff00);
    GL11.glPopMatrix();
    drawString(fontRenderer, "Minecraft Beta 1.7.3", 2, 2, 0x505050);
    drawString(fontRenderer, "BetaExpansion "+mod_BetaExpansion.version, 2, height-10, 0x505050);
    String s = "Copyright Mojang AB. Do not distribute.";
    drawString(fontRenderer, s, width - fontRenderer.getStringWidth(s) - 2, height - 10, 0xffffff);
    super.drawScreen(i, j, f);
}
 

/**
    * Renders the world to the water framebuffer.
    * @param worldCamera
    * @param world
    */
   public void preRender(final PerspectiveCamera camera, final World world) {
GL11.glEnable(GL30.GL_CLIP_DISTANCE0);
framebuffer.bind();
GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);

// Render to reflection texture.
float verticalDistance = camera.getPosition().y - WATER_HEIGHT;
camera.getPosition().y -= verticalDistance * 2;
camera.invertPitch();
camera.update();
world.renderWithoutWater(camera, true);
camera.invertPitch();
camera.getPosition().y += verticalDistance * 2;
camera.update();

FrameBuffer.unbind();
GL11.glDisable(GL30.GL_CLIP_DISTANCE0);
   }
 

public static void allocateTextureImpl(int p_180600_0_, int p_180600_1_, int p_180600_2_, int p_180600_3_)
{
    deleteTexture(p_180600_0_);
    bindTexture(p_180600_0_);

    if (p_180600_1_ >= 0)
    {
        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL12.GL_TEXTURE_MAX_LEVEL, p_180600_1_);
        GL11.glTexParameterf(GL11.GL_TEXTURE_2D, GL12.GL_TEXTURE_MIN_LOD, 0.0F);
        GL11.glTexParameterf(GL11.GL_TEXTURE_2D, GL12.GL_TEXTURE_MAX_LOD, (float)p_180600_1_);
        GL11.glTexParameterf(GL11.GL_TEXTURE_2D, GL14.GL_TEXTURE_LOD_BIAS, 0.0F);
    }

    for (int i = 0; i <= p_180600_1_; ++i)
    {
        GL11.glTexImage2D(GL11.GL_TEXTURE_2D, i, GL11.GL_RGBA, p_180600_2_ >> i, p_180600_3_ >> i, 0, GL12.GL_BGRA, GL12.GL_UNSIGNED_INT_8_8_8_8_REV, (IntBuffer)((IntBuffer)null));
    }
}
 

public static void genCompositeMipmap()
{
    if (hasGlGenMipmap)
    {
        for (int i = 0; i < usedColorBuffers; ++i)
        {
            if ((activeCompositeMipmapSetting & 1 << i) != 0)
            {
                GlStateManager.setActiveTexture(33984 + colorTextureTextureImageUnit[i]);
                GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR_MIPMAP_LINEAR);
                GL30.glGenerateMipmap(3553);
            }
        }

        GlStateManager.setActiveTexture(33984);
    }
}
 

public static Texture loadTexture(String textureFile) {
		try {
//			InputStream in = TextureLoader.class.getResourceAsStream("/" + textureFile);
			InputStream in = Util.loadInternal(textureFile);
			BufferedImage image = ImageIO.read(in);
			
			int[] pixels = new int[image.getWidth() * image.getHeight()];
			image.getRGB(0, 0, image.getWidth(), image.getHeight(), pixels, 0, image.getWidth());
			ByteBuffer buffer = ByteBuffer.allocateDirect(image.getWidth() * image.getHeight() * 4);
			
			for(int h = 0; h < image.getHeight(); h++) {
				for(int w = 0; w < image.getWidth(); w++) {
					int pixel = pixels[h * image.getWidth() + w];
					
					buffer.put((byte) ((pixel >> 16) & 0xFF));
					buffer.put((byte) ((pixel >> 8) & 0xFF));
					buffer.put((byte) (pixel & 0xFF));
					buffer.put((byte) ((pixel >> 24) & 0xFF));
				}
			}
			
			buffer.flip();
			in.close();
			
			int textureID = GL11.glGenTextures();
			GL11.glBindTexture(GL11.GL_TEXTURE_2D, textureID);
			GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, GL11.GL_RGBA8, image.getWidth(), image.getHeight(), 0, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, buffer);
			
			GL30.glGenerateMipmap(GL11.GL_TEXTURE_2D);
			GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR_MIPMAP_NEAREST);
			GL11.glTexParameterf(GL11.GL_TEXTURE_2D, GL14.GL_MAX_TEXTURE_LOD_BIAS, -1);
			GL11.glBindTexture(GL11.GL_TEXTURE_2D, 0);
			
			return new Texture(textureID, image.getWidth(), image.getHeight());
		} catch (Exception e) {
			e.printStackTrace();
			
			return null;
		}
	}
 

@Override
public void render(float alpha)
{
    Vec2 pos = getPos();
    Vec2 radius = getRadius();
    
    if (getValue())
    {
        GL11.glColor4f(1.0f, 1.0f, 1.0f, alpha*0.5f);
        GL11.glBegin(GL11.GL_QUADS);
        GL11.glVertex2f(pos.x - radius.x, pos.y - radius.y);
        GL11.glVertex2f(pos.x - radius.x, pos.y + radius.y);
        GL11.glVertex2f(pos.x + radius.x, pos.y + radius.y);
        GL11.glVertex2f(pos.x + radius.x, pos.y - radius.y);
        GL11.glEnd();
    }
    
    GL11.glLineWidth(1.0f);
    float color = Main.instance().getFocus() == this ? 0.75f : 1.0f;
    GL11.glColor4f(color, color, 1.0f, alpha);
    font.render(text, pos, size, Alignment.C);
    
    GL11.glBegin(GL11.GL_LINE_LOOP);
    GL11.glVertex2f(pos.x - radius.x, pos.y - radius.y);
    GL11.glVertex2f(pos.x - radius.x, pos.y + radius.y);
    GL11.glVertex2f(pos.x + radius.x, pos.y + radius.y);
    GL11.glVertex2f(pos.x + radius.x, pos.y - radius.y);
    GL11.glEnd();
}
 

/**
 * @see org.newdawn.slick.opengl.renderer.SGL#enterOrtho(int, int)
 */
public void enterOrtho(int xsize, int ysize) {
	GL11.glMatrixMode(GL11.GL_PROJECTION);
	GL11.glLoadIdentity();
	GL11.glOrtho(0, width, height, 0, 1, -1);
	GL11.glMatrixMode(GL11.GL_MODELVIEW);
	
	GL11.glTranslatef((width-xsize)/2,
					  (height-ysize)/2,0);
}
 

public void update(ByteBuffer pixelBuffer, int width, int height, Bitmap.Format format)
{
	this.bitmap = null;
	this.width = width;
	this.height = height;
	GL11.glTexSubImage2D(GL11.GL_TEXTURE_2D, 0, 0, 0, this.width, this.height, getTextureFormat(format), getTextureBufferType(format), pixelBuffer);
}
 

/**
     * Draws a rectangle with a horizontal gradient between the specified colors.
     * x2 and y2 are not included.
     */
    public static void drawHorizontalGradientRect(int x1, int y1, int x2, int y2, int color1, int color2) {
//        this.zLevel = 300.0F;
        float zLevel = 0.0f;

        float f = (color1 >> 24 & 255) / 255.0F;
        float f1 = (color1 >> 16 & 255) / 255.0F;
        float f2 = (color1 >> 8 & 255) / 255.0F;
        float f3 = (color1 & 255) / 255.0F;
        float f4 = (color2 >> 24 & 255) / 255.0F;
        float f5 = (color2 >> 16 & 255) / 255.0F;
        float f6 = (color2 >> 8 & 255) / 255.0F;
        float f7 = (color2 & 255) / 255.0F;
        GlStateManager.disableTexture2D();
        GlStateManager.enableBlend();
        GlStateManager.disableAlpha();
        OpenGlHelper.glBlendFunc(770, 771, 1, 0);
        GlStateManager.shadeModel(GL11.GL_SMOOTH);
        Tessellator tessellator = Tessellator.getInstance();
        VertexBuffer buffer = tessellator.getBuffer();
        buffer.begin(GL11.GL_QUADS, DefaultVertexFormats.POSITION_COLOR);
        buffer.pos(x1, y1, zLevel).color(f1, f2, f3, f).endVertex();
        buffer.pos(x1, y2, zLevel).color(f1, f2, f3, f).endVertex();
        buffer.pos(x2, y2, zLevel).color(f5, f6, f7, f4).endVertex();
        buffer.pos(x2, y1, zLevel).color(f5, f6, f7, f4).endVertex();
        tessellator.draw();
        GlStateManager.shadeModel(GL11.GL_FLAT);
        GlStateManager.disableBlend();
        GlStateManager.enableAlpha();
        GlStateManager.enableTexture2D();
    }
 

public static void startClip(float x1, float y1, float x2, float y2) {
    if (y1 > y2) {
        float temp = y2;
        y2 = y1;
        y1 = temp;
    }
    GL11.glEnable((int)3089);
    GL11.glScissor((int)((int)x1), (int)((int)((float)Display.getHeight() - y2)), (int)((int)(x2 - x1)), (int)((int)(y2 - y1)));
}
 

public static void enableGL2D() {
    GL11.glDisable((int)2929);
    GL11.glEnable((int)3042);
    GL11.glDisable((int)3553);
    GL11.glBlendFunc((int)770, (int)771);
    GL11.glDepthMask((boolean)true);
    GL11.glEnable((int)2848);
    GL11.glHint((int)3154, (int)4354);
    GL11.glHint((int)3155, (int)4354);
}
 

private void setupArrayPointers()
{
    GL11.glVertexPointer(3, GL11.GL_FLOAT, 28, 0L);
    GL11.glColorPointer(4, GL11.GL_UNSIGNED_BYTE, 28, 12L);
    GL11.glTexCoordPointer(2, GL11.GL_FLOAT, 28, 16L);
    OpenGlHelper.setClientActiveTexture(OpenGlHelper.lightmapTexUnit);
    GL11.glTexCoordPointer(2, GL11.GL_SHORT, 28, 24L);
    OpenGlHelper.setClientActiveTexture(OpenGlHelper.defaultTexUnit);
}
 

@Override
public void render(TileEntityXPBlock te, double x, double y, double z, float partialTicks, int destroyStage, float alpha)
{
	if(GlobalXP.config.renderNameplate)
	{
		ITextComponent levelsText = new TextComponentString((int)te.getStoredLevels() + " (" + te.getStoredXP() + ")");

		if(te != null && te.getPos() != null && rendererDispatcher.cameraHitResult != null && rendererDispatcher.cameraHitResult.getBlockPos() != null && rendererDispatcher.cameraHitResult.getBlockPos().equals(te.getPos()))
		{
			setLightmapDisabled(true);
			drawNameplate(te, levelsText.getFormattedText(), x, y, z, 12);
			setLightmapDisabled(false);
		}
	}

	double offset = Math.sin((te.getWorld().getTotalWorldTime() + partialTicks) * GlobalXP.config.bobSpeed / 8.0D) / 10.0D;
	IBakedModel model = Minecraft.getMinecraft().getRenderItem().getItemModelWithOverrides(emerald, te.getWorld(), null);

	GlStateManager.enableRescaleNormal();
	GlStateManager.alphaFunc(GL11.GL_GREATER, 0.1F);
	GlStateManager.enableBlend();
	RenderHelper.enableStandardItemLighting();
	GlStateManager.tryBlendFuncSeparate(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA, 1, 0);
	GlStateManager.pushMatrix();
	GlStateManager.translate(x + 0.5D, y + 0.4D + offset, z + 0.5D);
	GlStateManager.rotate((te.getWorld().getTotalWorldTime() + partialTicks) * 4.0F * (float)GlobalXP.config.spinSpeed, 0.0F, 1.0F, 0.0F);
	model = ForgeHooksClient.handleCameraTransforms(model, TransformType.GROUND, false);
	Minecraft.getMinecraft().getTextureManager().bindTexture(TextureMap.LOCATION_BLOCKS_TEXTURE);
	Minecraft.getMinecraft().getRenderItem().renderItem(emerald, model);
	GlStateManager.popMatrix();
	GlStateManager.disableRescaleNormal();
	GlStateManager.disableBlend();
}
 

public void renderCrosshair()
{
    GL11.glLineWidth(1.0f);
    GL11.glColor4f(1.0f, 1.0f, 1.0f, 0.5f);
    GL11.glBegin(GL11.GL_LINES);
    GL11.glVertex2f(-CROSSHAIR_WIDTH, -0.5f);
    GL11.glVertex2f(-CROSSHAIR_INNER_WIDTH, -0.5f);
    GL11.glVertex2f(CROSSHAIR_WIDTH + 1.0f, -0.5f);
    GL11.glVertex2f(CROSSHAIR_INNER_WIDTH + 1.0f, -0.5f);
    GL11.glVertex2f(0.5f, -CROSSHAIR_WIDTH - 1.0f);
    GL11.glVertex2f(0.5f, -CROSSHAIR_INNER_WIDTH - 1.0f);
    GL11.glVertex2f(0.5f, CROSSHAIR_WIDTH);
    GL11.glVertex2f(0.5f, CROSSHAIR_INNER_WIDTH);
    GL11.glEnd();
}
 

private void drawQuads(int x1, int y1, int x2, int y2)
{
	GL11.glBegin(GL11.GL_QUADS);
	GL11.glVertex2i(x1, y1);
	GL11.glVertex2i(x2, y1);
	GL11.glVertex2i(x2, y2);
	GL11.glVertex2i(x1, y2);
	GL11.glEnd();
}
 

public static void shadeModel(int mode)
{
    if (mode != activeShadeModel)
    {
        activeShadeModel = mode;
        GL11.glShadeModel(mode);
    }
}
 

@Override
public void render(float alpha) {
	AppUI.clearBuffer(GL11.GL_COLOR_BUFFER_BIT);
	AppUI.clearColors(0f, 0f, 0f, 1);
	window.beingNVGFrame();
	Theme.renderBox(window.getNVGID(), 0, 0, window.getWidth(), window.getHeight(),
			Theme.setColor(1, 1, 1, 1, Theme.colorA), 0, 0, 0, 0);
	Theme.renderImage(window.getNVGID(), 0, 0, window.getWidth(), window.getHeight(), wallpaper, 1);
	window.endNVGFrame();
}
 

public static void preWater()
{
    if (usedDepthBuffers >= 2)
    {
        GlStateManager.setActiveTexture(33995);
        checkGLError("pre copy depth");
        GL11.glCopyTexSubImage2D(GL11.GL_TEXTURE_2D, 0, 0, 0, 0, 0, renderWidth, renderHeight);
        checkGLError("copy depth");
        GlStateManager.setActiveTexture(33984);
    }

    ShadersTex.bindNSTextures(defaultTexture.getMultiTexID());
}
 

private static void setFog(int param)
{
    if (param != fogState.mode)
    {
        fogState.mode = param;
        GL11.glFogi(GL11.GL_FOG_MODE, param);
    }
}
 

@Override
protected void renderEquippedItems(EntityLivingBase entity, float unknown)
   {
	GL11.glColor3f(1.0F, 1.0F, 1.0F);
       super.renderEquippedItems(entity, unknown);
       
       ItemStack itemstack = entity.getHeldItem();	// The weapon you're holding
       
       if (itemstack != null && itemstack.getItem() != null) 
       { 
       	 GL11.glPushMatrix();

            GL11.glTranslatef(-0.0625F, 0.4375F, 0.0625F);

            float scale = 0.625F;

            GL11.glTranslatef(0.3F, 0.2F, -0.25F);		// 0.0F, 0.1875F, 0.0F, left/right, up/down, forward/backward?
            GL11.glScalef(scale, -scale, scale);
            GL11.glRotatef(-20.0F, 1.0F, 0.0F, 0.0F);	// -100
            GL11.glRotatef(45.0F, 0.0F, 1.0F, 0.0F);

            int color = itemstack.getItem().getColorFromItemStack(itemstack, 0);
            float colorR = (float) (color >> 16 & 255) / 255.0F;
            float colorB = (float) (color >> 8 & 255) / 255.0F;
            float colorG = (float) (color & 255) / 255.0F;
            GL11.glColor4f(colorR, colorB, colorG, 1.0F);
           
            this.renderManager.itemRenderer.renderItem(entity, itemstack, 0);

            GL11.glPopMatrix();
       }
       
       this.renderStoredItems((Entity_BB) entity);
   }
 

public void renderLightMapOnPlayerHead(World world, EntityLivingBase wearer) {
	GlStateManager.pushMatrix();
	GlStateManager.enableBlend();
	GlStateManager.blendFunc(GL11.GL_ONE, GL11.GL_ONE);
	GlStateManager.depthMask(true);
	float brightnessX = OpenGlHelper.lastBrightnessX;
	float brightnessY = OpenGlHelper.lastBrightnessY;
	OpenGlHelper.setLightmapTextureCoords(OpenGlHelper.lightmapTexUnit, 61680, 0);
	head.render(0.01F);
	OpenGlHelper.setLightmapTextureCoords(OpenGlHelper.lightmapTexUnit, brightnessX, brightnessY);
	GlStateManager.disableBlend();
	GlStateManager.blendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
	GlStateManager.popMatrix();
}
 

/**
 * Draw with the WorldRenderer
 */
private static void draw(VertexBuffer renderer, int x, int y, int width, int height, int red, int green, int blue, int alpha) {
    renderer.begin(GL11.GL_QUADS, DefaultVertexFormats.POSITION_COLOR);
    renderer.pos((x + 0), (y + 0), 0.0D).color(red, green, blue, alpha).endVertex();
    renderer.pos((x + 0), (y + height), 0.0D).color(red, green, blue, alpha).endVertex();
    renderer.pos((x + width), (y + height), 0.0D).color(red, green, blue, alpha).endVertex();
    renderer.pos((x + width), (y + 0), 0.0D).color(red, green, blue, alpha).endVertex();
    Tessellator.getInstance().draw();
}
 

private void indicateStorageType(int width, int height){
	if(isDepthAttachment()){
		GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, format, width, height, 0, GL11.GL_DEPTH_COMPONENT, GL11.GL_FLOAT, (ByteBuffer) null);
	}else{
		GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, format, width, height, 0, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, (ByteBuffer) null);
	}
}