Method beginRender

src/main/java/net/optifine/shaders/Shaders.java:3967–4120

(Minecraft minecraft, float partialTicks, long finishTimeNano)

    }

    public static void beginRender(Minecraft minecraft, float partialTicks, long finishTimeNano)
    {
        checkGLError("pre beginRender");
        checkWorldChanged(mc.theWorld);
        mc = minecraft;
        mc.mcProfiler.startSection("init");
        entityRenderer = mc.entityRenderer;

        if (!isShaderPackInitialized)
        {
            try
            {
                init();
            }
            catch (IllegalStateException illegalstateexception)
            {
                if (Config.normalize(illegalstateexception.getMessage()).equals("Function is not supported"))
                {
                    printChatAndLogError("[Shaders] Error: " + illegalstateexception.getMessage());
                    illegalstateexception.printStackTrace();
                    setShaderPack("OFF");
                    return;
                }
            }
        }

        if (mc.displayWidth != renderDisplayWidth || mc.displayHeight != renderDisplayHeight)
        {
            resize();
        }

        if (needResizeShadow)
        {
            resizeShadow();
        }

        worldTime = mc.theWorld.getWorldTime();
        diffWorldTime = (worldTime - lastWorldTime) % 24000L;

        if (diffWorldTime < 0L)
        {
            diffWorldTime += 24000L;
        }

        lastWorldTime = worldTime;
        moonPhase = mc.theWorld.getMoonPhase();
        ++frameCounter;

        if (frameCounter >= 720720)
        {
            frameCounter = 0;
        }

        systemTime = System.currentTimeMillis();

        if (lastSystemTime == 0L)
        {
            lastSystemTime = systemTime;