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vs_3_0.3Cg

NAME

vs_3_0 - Direct3D Shader Model 3.0 vertex profile for DirectX 9

SYNOPSIS

   vs_3_0
 
 
 

DESCRIPTION

This Direct3D profile corresponds to the per-vertex functionality introduced by GeForce FX (NV3x) for DirectX 9.

The compiler output for this profile conforms to the textual assembly defined by DirectX 9's Vertex Shader 3.0 shader format. See:

   http://msdn.microsoft.com/en-us/library/bb172930.aspx
 
 
 

Data-dependent loops are allowed with a limit of 256 iterations maximum. Four levels of nesting are allowed.

Conditional expressions can be supported with data-dependent branching.

Relative indexing of uniform arrays is not supported; use texture accesses instead.

3D API DEPENDENCIES

Requires Direct3D 9 support.

PROFILE OPTIONS

None.

DATA TYPES

half

The half data type makes use of the Partial Precision instruction modifier to request less precision.

NVIDIA GPUs may use half-precision floating-point when the Partial Precision instruction modifier is specified. Half-precision floating-point is encoded with a sign bit, 10 mantissa bits, and 5 exponent bits (biased by 16), sometimes called s10e5.

float

float values in vs_3_0 require standard IEEE 754 single-precision floating-point encoding with a sign bit, 23 mantissa bits, and 8 exponent bits (biased by 128), sometimes called s10e5.

fixed

The fixed data type is treated like half.

SEMANTICS

INPUT SEMANTICS

   Binding Semantics Name           Corresponding Data
 
 
 

   COLOR                            Input primary color
   COLOR0
   COL
   COL0
 
 
 

   COLOR1                           Input secondary color
   COL1
 
 
 

   TEX0                             Input texture coordinate sets 0
   TEXCOORD0
 
 
 

   TEX1                             Input texture coordinate sets 1
   TEXCOORD1
 
 
 

   TEX2                             Input texture coordinate sets 2
   TEXCOORD2
 
 
 

   TEX3                             Input texture coordinate sets 3
   TEXCOORD3
 
 
 

   TEX4                             Input texture coordinate sets 4
   TEXCOORD4
 
 
 

   TEX5                             Input texture coordinate sets 5
   TEXCOORD5
 
 
 

   TEX6                             Input texture coordinate sets 6
   TEXCOORD6
 
 
 

   TEX7                             Input texture coordinate sets 7
   TEXCOORD7
 
 
 

   FOGP                             Input fog color (XYZ) and factor (W)
   FOG
 
 
 

UNIFORM INPUT SEMANTICS

Eight texture units are supported:

   Binding Semantic Name            Corresponding Data
 
 
 

   TEXUNIT0                         Texture unit 0
   TEXUNIT1                         Texture unit 1
   ...
   TEXUNIT7                         Texture unit 7
 
 
 

OUTPUT SEMANTICS

   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
 
 
 

STANDARD LIBRARY ISSUES

This profile may have limits on the number of dependent texture fetches.

SEE ALSO

ps_3_0