Optionally set which ray types are known to be on or off (0 means not known at optimize time).

Optionally set which ray types are known to be on or off (0 means not known at optimize time).

Define the shader we're compiling with the given AST root.

Set the name and type of the shader

Has a shader already been defined?

Get the name of the shader.

Return the shader type: "surface", "displacement", "volume", "light", or "shader" (for generic shaders).

For all the instance's parameters (that can't be overridden by the geometry), if they can be found to be effectively constants or globals, make consta

The --expr ARG command line option will take ARG that is a snipped of OSL source code, embed it in some boilerplate shader wrapper, compile it from me

Return true for parsers whose only purpose is to read the header up to params, to stop parsing as soon as we start encountering temps in the symbol ta

Given the name of a 'feature', return whether this RendererServices supports it. Feature names include: <none> This allows some customization of JIT

Is the given symbol stale? A "stale" symbol is one that, within the current basic block, has been assigned in a simple manner (by a single op with no

Return a pointer to the symbol (specified by integer index), or NULL (if index was -1, as returned by 'findsymbol').

Return a pointer to a particular indexed symbol in the current inst

Register a new symbol.

Add a default integer value to the last declared symbol.

Return a string representation ("param", "global", etc.) of this symbol.

Check if a given movement is possible without breaking the automata. Leaves the state untouched

Return a pointer to the texture system.

This link information is actually not used inside of this class for other thing than to keep track of who links who and in what way. Everything is use

Warp the unit disk onto the unit sphere http://psgraphics.blogspot.com/2011/01/improved-code-for-concentric-map.html

Immediately trace a ray from P in the direction R. Return true if anything hit, otherwise false.

Run through all the ops, for each one marking its 'written' arguments as dependent upon its 'read' arguments (and performing unification as we go), yi

Called after code is generated, this function loops over all the ops and figures out the lifetimes of all variables, based on whether the args in each

Transform points Pin[0..npoints-1] in named coordinate system 'from' into 'to' coordinates, storing the result in Pout[] using the specified vector se