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<BLOCKQUOTE>
<H1><A NAME="NAME"><A NAME="1">NAME
</A></A></H1>
<P>
<B>vs_4_0</B> - Translation profile to DirectX 10's High Level Shader Language for vertex shaders.
</P>
<H1><A NAME="SYNOPSIS"><A NAME="2">SYNOPSIS
</A></A></H1>
<PRE> vs_4_0
</PRE>
<H1><A NAME="DESCRIPTION"><A NAME="3">DESCRIPTION
</A></A></H1>
<P>
This Direct3D profile translates Cg into DirectX 10's High Level Shader
Language (HLSL10) for vertex shaders.
</P>
<P>
The compiler output for this profile conforms to the textual high-level
language defined by DirectX 10's High Level Shading Language.
</P>
<P>
The limitations of the <B>vs_4_0</B> profile depend on what HLSL profile to
which the translated HLSL code is compiled.
</P>
<H1><A NAME="3D_API_DEPENDENCIES"><A NAME="4">3D API DEPENDENCIES
</A></A></H1>
<P>
Requires Direct3D 10 support.
</P>
<PRE> <A HREF="http://msdn.microsoft.com/en-us/library/bb509657.aspx">msdn.microsoft.com/en-us/library/bb509657.aspx</A>
</PRE>
<H1><A NAME="PROFILE_OPTIONS"><A NAME="5">PROFILE OPTIONS
</A></A></H1>
<P>
-po pad16
This will add padding variables to the cbuffer declarations to match
the 16 byte padding the GP4 OpenGL profiles use. This makes sure
each variable in the cbuffer uses an entire float4 constant instead
of the tight packing HLSL10 normally uses.
</P>
<H1><A NAME="DATA_TYPES"><A NAME="6">DATA TYPES
</A></A></H1>
<P>
In general, the Cg data types translate to the HLSL10 data types with the
same name.
</P>
<DL>
<DT><STRONG>float, half, fixed
</STRONG></DT>
<DD>
<P>
These numeric data types all correspond to standard IEEE 754 single-precision
floating-point encoding with a sign bit, 23 mantissa bits, and 8 exponent
bits (biased by 128), sometimes called <I>s10e5</I>.
</P>
<DT><STRONG>int
</STRONG></DT>
<DD>
<P>
This integral data type operates like an integer over the -2^24 to 2^24 range.
The result of int by int division is an integer (rounding down) to match C.
</P>
</DD></DL>
<H1><A NAME="SEMANTICS"><A NAME="7">SEMANTICS
</A></A></H1>
<H2><A NAME="INPUT_SEMANTICS"><A NAME="8">INPUT SEMANTICS
</A></A></H2>
<PRE> Binding Semantics Name Corresponding Data
POSITION Object-space position (SV_Position)
NORMAL Object-space normal
COLOR Primary color (float4) (SV_Target)
COLOR0
DIFFUSE
COLOR1 Secondary color (float4)
SPECULAR
FOGCOORD Fog coordinate
TEXCOORD# Texture coordinate set #
</PRE>
<H2><A NAME="UNIFORM_INPUT_SEMANTICS"><A NAME="9">UNIFORM INPUT SEMANTICS
</A></A></H2>
<P>
Sixteen texture units are supported:
</P>
<PRE> Binding Semantic Name Corresponding Data
TEXUNIT0 Texture unit 0
TEXUNIT1 Texture unit 1
...
TEXUNIT15 Texture unit 15
</PRE>
<H2><A NAME="OUTPUT_SEMANTICS"><A NAME="10">OUTPUT SEMANTICS
</A></A></H2>
<PRE> Binding Semantics Name Corresponding Data
POSITION, HPOS Output position
PSIZE, PSIZ Output point size
FOG, FOGC Output fog coordinate
COLOR0, COL0 Output primary color
COLOR1, COL1 Output secondary color
BCOL0 Output backface primary color
BCOL1 Output backface secondary color
TEXCOORD0-TEXCOORD7, Output texture coordinates
TEX0-TEX7
CLP0-CL5 Output Clip distances
</PRE>
<H1><A NAME="STANDARD_LIBRARY_ISSUES"><A NAME="11">STANDARD LIBRARY ISSUES
</A></A></H1>
<P>
This profile is limited to standard library support available in HLSL10 for vertex shaders.
In general, the Cg and HLSL10 standard libraries are very similar.
</P>
<H1><A NAME="SEE_ALSO"><A NAME="12">SEE ALSO
</A></A></H1>
<P>
<A HREF="gs_4_0.html">gs_4_0</A>,
<A HREF="ps_4_0.html">ps_4_0</A>
</P>
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