GuiMainMenu.java 文件源码

/**
 * Rotate and blurs the skybox view in the main menu
 */
private void rotateAndBlurSkybox(float p_73968_1_)
{
    this.mc.getTextureManager().bindTexture(this.backgroundTexture);
    GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR);
    GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_LINEAR);
    GL11.glCopyTexSubImage2D(GL11.GL_TEXTURE_2D, 0, 0, 0, 0, 0, 256, 256);
    GlStateManager.enableBlend();
    GlStateManager.tryBlendFuncSeparate(770, 771, 1, 0);
    GlStateManager.colorMask(true, true, true, false);
    Tessellator tessellator = Tessellator.getInstance();
    WorldRenderer worldrenderer = tessellator.getWorldRenderer();
    worldrenderer.begin(7, DefaultVertexFormats.POSITION_TEX_COLOR);
    GlStateManager.disableAlpha();
    int i = 3;

    for (int j = 0; j < i; ++j)
    {
        float f = 1.0F / (float)(j + 1);
        int k = this.width;
        int l = this.height;
        float f1 = (float)(j - i / 2) / 256.0F;
        worldrenderer.pos((double)k, (double)l, (double)this.zLevel).tex((double)(0.0F + f1), 1.0D).color(1.0F, 1.0F, 1.0F, f).endVertex();
        worldrenderer.pos((double)k, 0.0D, (double)this.zLevel).tex((double)(1.0F + f1), 1.0D).color(1.0F, 1.0F, 1.0F, f).endVertex();
        worldrenderer.pos(0.0D, 0.0D, (double)this.zLevel).tex((double)(1.0F + f1), 0.0D).color(1.0F, 1.0F, 1.0F, f).endVertex();
        worldrenderer.pos(0.0D, (double)l, (double)this.zLevel).tex((double)(0.0F + f1), 0.0D).color(1.0F, 1.0F, 1.0F, f).endVertex();
    }

    tessellator.draw();
    GlStateManager.enableAlpha();
    GlStateManager.colorMask(true, true, true, true);
}