View source for Func water analog

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{{CD|CFuncMoveLinear|file1=func_movelinear.cpp}}
{{this is a|brush entity|name=func_water_analog}} It's a version of {{ent|func_movelinear}} slightly specialized for use as water.

{{important|Does not work with materials using real time reflections and/or refractions, as seen in {{ent|water (shader)|alt=Water}} and {{ent|Refract}}.<br>Use a material which uses a regular brush shader, such as:
* {{file|nature/water_movingplane|vmt}} ([[LightmappedGeneric]])
* {{file|nature/water_dx70|vmt}} ([[LightmappedGeneric]])
* {{file|nature/hazard_liquid|vmt}} ([[LightmappedGeneric]]) {{only|{{portal}}}}
* {{file|liquids/!greenslime|vmt}} ([[UnlitTwoTexture]]) {{only|{{hls}} {{hldms}} {{jbep3}} }}
{{modernConfirm|Do the Water and Refract shaders work if using cubemap reflections and refractions, instead of the real-time versions? This would still be beneficial for the ability to have two normal maps scrolling in different directions.}} }}

{{bug|Doesn't behave properly in {{l4d2}}! Physics don't behave properly if affected by this brush and graphical glitches can occur. Use sparingly and cautiously!|tested={{l4d2}}}}

{{bug|If this entity uses multiple brushes - [[VPhysics]] objects works incorrectly with this entity (the same for {{ent|func_water|engine=source}}) in {{bms|4}}. It looks like they are using this entity's [[Bounding box|BBox]] to calculate physics, instead of using brushes. This issue can be found in [[Interloper]] chapter. Separate water into several separate entities to avoid this bug.
{{expand|title=Examples.|margin_left=2em|
 [[File:wateran1.jpg| thumb | left | 710px |Note how the hat "flying in air".]]
 [[File:wateran2.jpg| thumb | right | 710px |Note how the hat "flying in air".]]
}}
}}

{{bug|This entity always has its contents set to [[BSP flags (Source)|CONTENTS_WATER]] (regardless of brush contents), with no way of setting its contents to [[BSP flags (Source)|CONTENTS_SLIME]]. In most games, this will only affect splash particles.
{{code fix|Add a KV that is read by {{code|CMoveFuncLinear::CreateVPhysics}} to set {{code|fluid.contents}} (defaulting to CONTENTS_WATER if KV is absent)}}
}}

{{FuncMoveLinear notes}}

{{codenote|Both <code>func_water_analog</code> and {{ent|func_movelinear}} are linked to [[CFuncMoveLinear]] C++ class. The game code checks the {{mono|classname}} KV to distinguish between them.}}

==Keyvalues==
{{KV|Water Material|intn=WaterMaterial|material|The material to derive water information from. Determines $underwateroverlay that use {{ent|func_water_analog}}.|only=BMS}}
:{{Bug|Don't work after reload. You still can repeat this effect with trigger and {{ent|env_screenoverlay}}}}
{{KV|Wave Height|intn=WaveHeight|string|only=BMS}}


{{OtherKIO|func_movelinear}}

==See also==
*[[Moving water (Source)|Moving water]]

[[Category:SFX_Brush_Entities]]
[[Category:Water]]