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cam.Start3D

<function name="Start3D" parent="cam" type="libraryfunc">
<file line="115-L144">lua/includes/extensions/client/render.lua</file>
	<description>
Sets up a new 3D rendering context. Must be finished by <page>cam.End3D</page>.

For more advanced settings such as an orthographic view, use <page>cam.Start</page> instead.

<rendercontext hook="true" type="3D"></rendercontext>

<bug issue="1995">Negative x/y values won't work.</bug>

<bug issue="2682">This will not update current view properties.</bug>
	</description>
	<realm>Client</realm>
	<args>
		<arg name="pos" type="Vector" default="EyePos()">Render cam position.</arg>
		<arg name="angles" type="Angle" default="EyeAngles()">Render cam angles.</arg>
		<arg name="fov" type="number" default="nil">Field of view.</arg>
		<arg name="x" type="number" default="0">X coordinate of where to start the new view port.</arg>
		<arg name="y" type="number" default="0">Y coordinate of where to start the new view port.</arg>
		<arg name="w" type="number" default="ScrW()">Width of the new viewport.</arg>
		<arg name="h" type="number" default="ScrH()">Height of the new viewport.</arg>
		<arg name="zNear" type="number" default="nil">Distance to near clipping plane.


<note>Both zNear and zFar need a value before any of them work.

zNear also requires a value higher than 0.
</note>
</arg>
		<arg name="zFar" type="number" default="nil">Distance to far clipping plane.</arg>
	</args>
</function>

<example>
	<description>Set up a 3D rendering environment in a 2D rendering hook to render models on HUD.</description>
	<code>
hook.Add( "HUDPaint", "3d_camera_example", function()
	cam.Start3D()
		for id, ply in ipairs( player.GetAll() ) do
			ply:DrawModel()
		end
	cam.End3D()
end )
	</code>
	<output>All players can be seen through walls.</output>
</example>

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