Method render

src/main/java/net/optifine/CustomSkyLayer.java:323–372

(World world, int timeOfDay, float celestialAngle, float rainStrength, float thunderStrength)

    }

    public void render(World world, int timeOfDay, float celestialAngle, float rainStrength, float thunderStrength)
    {
        float f = this.getPositionBrightness(world);
        float f1 = this.getWeatherBrightness(rainStrength, thunderStrength);
        float f2 = this.getFadeBrightness(timeOfDay);
        float f3 = f * f1 * f2;
        f3 = Config.limit(f3, 0.0F, 1.0F);

        if (f3 >= 1.0E-4F)
        {
            GlStateManager.bindTexture(this.textureId);
            Blender.setupBlend(this.blend, f3);
            GlStateManager.pushMatrix();

            if (this.rotate)
            {
                float f4 = 0.0F;

                if (this.speed != (float)Math.round(this.speed))
                {
                    long i = (world.getWorldTime() + 18000L) / 24000L;
                    double d0 = (double)(this.speed % 1.0F);
                    double d1 = (double)i * d0;
                    f4 = (float)(d1 % 1.0D);
                }

                GlStateManager.rotate(360.0F * (f4 + celestialAngle * this.speed), this.axis[0], this.axis[1], this.axis[2]);
            }

            Tessellator tessellator = Tessellator.getInstance();
            GlStateManager.rotate(90.0F, 1.0F, 0.0F, 0.0F);
            GlStateManager.rotate(-90.0F, 0.0F, 0.0F, 1.0F);
            this.renderSide(tessellator, 4);
            GlStateManager.pushMatrix();
            GlStateManager.rotate(90.0F, 1.0F, 0.0F, 0.0F);
            this.renderSide(tessellator, 1);
            GlStateManager.popMatrix();
            GlStateManager.pushMatrix();
            GlStateManager.rotate(-90.0F, 1.0F, 0.0F, 0.0F);
            this.renderSide(tessellator, 0);
            GlStateManager.popMatrix();
            GlStateManager.rotate(90.0F, 0.0F, 0.0F, 1.0F);
            this.renderSide(tessellator, 5);
            GlStateManager.rotate(90.0F, 0.0F, 0.0F, 1.0F);
            this.renderSide(tessellator, 2);
            GlStateManager.rotate(90.0F, 0.0F, 0.0F, 1.0F);
            this.renderSide(tessellator, 3);
            GlStateManager.popMatrix();
        }
    }

    private float getPositionBrightness(World world)
    {