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tan.3Cg

NAME

tan - returns tangent of scalars and vectors.

SYNOPSIS

   float  tan(float a);
   float1 tan(float1 a);
   float2 tan(float2 a);
   float3 tan(float3 a);
   float4 tan(float4 a);
 
 
 

   half   tan(half a);
   half1  tan(half1 a);
   half2  tan(half2 a);
   half3  tan(half3 a);
   half4  tan(half4 a);
 
 
 

   fixed  tan(fixed a);
   fixed1 tan(fixed1 a);
   fixed2 tan(fixed2 a);
   fixed3 tan(fixed3 a);
   fixed4 tan(fixed4 a);
 
 
 

PARAMETERS

a

Vector or scalar of which to determine the tangent.

DESCRIPTION

Returns the tangent of a in radians.

For vectors, the returned vector contains the tangent of each element of the input vector.

REFERENCE IMPLEMENTATION

tan can be implemented in terms of the sin and cos functions like this:

   float tan(float a) {
     float s, c;
     sincos(a, s, c);
     return s / c;
   }
 
 
 

PROFILE SUPPORT

tan is fully supported in all profiles unless otherwise specified.

tan is supported via approximations of sin and cos functions (see the respective sin and cos manual pages for details) in the vs_1, vp20, and arbvp1 profiles.

tan is unsupported in the fp20, ps_1_1, ps_1_2, and ps_1_3 profiles.

SEE ALSO

atan, atan2, cos, dot, frac, sin, sincos