NAME
sincos - returns sine of scalars and vectors.
SYNOPSIS
void sincos(float a, out float s, out float c); void sincos(float1 a, out float1 s, out float1 c); void sincos(float2 a, out float2 s, out float2 c); void sincos(float3 a, out float3 s, out float3 c); void sincos(float4 a, out float4 s, out float4 c); void sincos(half a, out half s, out half c); void sincos(half1 a, out half1 s, out half1 c); void sincos(half2 a, out half2 s, out half2 c); void sincos(half3 a, out half3 s, out half3 c); void sincos(half4 a, out half4 s, out half4 c); void sincos(fixed a, out fixed s, out fixed c); void sincos(fixed1 a, out fixed1 s, out fixed1 c); void sincos(fixed2 a, out fixed2 s, out fixed2 c); void sincos(fixed3 a, out fixed3 s, out fixed3 c); void sincos(fixed4 a, out fixed4 s, out fixed4 c);PARAMETERS
- a
Input vector or scalar of which to determine the sine and cosine.
- s
Ouput vector or scalar for sine results.
- c
Ouput vector or scalar for cosine results.
DESCRIPTION
Outputs to s the sine of a in radians, and outputs to c the cosine of a in radians. The output values are in the range [-1,+1].
For vectors, the output vectors contains the sine or cosine respectively of each element of the input vector.
REFERENCE IMPLEMENTATION
sin is best implemented as a native sine instruction, however sin for a float scalar could be implemented by an approximation like this.
void sincos(float3 a, out float3 s, float3 out c) { int i; for (i=0; i<3; i++) { s[i] = sin(a[i]); c[i] = cos(a[i]); } }PROFILE SUPPORT
sincos is fully supported in all profiles unless otherwise specified.
sincos is supported via an approximation (shown above) in the vs_1, vp20, and arbvp1 profiles.
sincos is unsupported in the fp20, ps_1_1, ps_1_2, and ps_1_3 profiles.
SEE ALSO