This IPL section is entirely exclusive to GTA: Underground and is used to create so-called tower clocks and digital clocks. Both are features ported from GTA: III and can be seen in Times Square.
The format is as follows:
cloc Center X, Center Y, Center Z, Width, Height, Type, R, G, B, Draw distance, Scale end
|Center X, Center Y, Center Z||The coordinates defining the center of the clock.|
|Width, Height||The size of the clock. Negative values can be used to "flip" the clock.|
|Type||The clock type.|
|R, G, B||This is the color of the light bulbs when this is a digital clock. If this is a tower clock, this is the color of the two clock needles.|
|Draw distance||The draw distance of this clock. If the camera is further away than this value, the clock will no longer be visible.|
|Scale||This is the size of the light bulbs when this is a digital clock. If this is a tower clock, this value is a multiplier for the length of the clock needles (a value of 1.0 is therefore the default value)|
|0||This is a tower clock. Tower clocks are essentially useful if you want to have a functional analog clock on your buildings.|
|1||This is a digital clock. It will display the in-game time as well as the current temperature through a number of bulbs. The temperature displayed is calculated from a set of base temperature values. When using server-side weathers you have the ability to set a temperature value and see how it gets displayed by a digital clock once you set it as the current weather type.|
Here are the lines used in Liberty City.
cloc # Center X, Center Y, Center Z, Width, Height, Type, R, G, B, Draw distance, Scale 8309.4, 7168.7, 54.15, 0, -1.0, 0.0, 0, 0, 0, 80.0, 2.0 8305.4, 7166.4, 54.15, 0, 0.0, -1.0, 0, 0, 0, 80.0, 2.0 8304.59, 7168.04, 32.803, 1, 0.501368, -0.865234, 255, 0, 0, 100.0, 0.8 8310.46, 7167.2, 32.803, 1, -0.501368, 0.865234, 0, 0, 255, 100.0, 0.8 8307.86, 7170.63, 32.803, 1, -0.865234, -0.501368, 0, 255, 0, 100.0, 0.8 end