<HTML> <HEAD> <TITLE>pow</TITLE> <STYLE TYPE="text/css" MEDIA=screen> <!-- BODY { font-family: Arial,Helvetica; } BLOCKQUOTE { margin: 10pt; } H1,A { color: #336699; } /*** Top menu style ****/ .mmenuon { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #ff6600; font-size: 10pt; } .mmenuoff { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #ffffff; font-size: 10pt; } .cpyright { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #ffffff; font-size: xx-small; } .cpyrightText { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #ffffff; font-size: xx-small; } .sections { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #336699; font-size: 11pt; } .dsections { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #336699; font-size: 12pt; } .slink { font-family: Arial,Helvetica; font-weight: normal; text-decoration: none; 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float1 pow(float1 x, float1 y); float2 pow(float2 x, float2 y); float3 pow(float3 x, float3 y); float4 pow(float4 x, float4 y); half pow(half x, half y); half1 pow(half1 x, half1 y); half2 pow(half2 x, half2 y); half3 pow(half3 x, half3 y); half4 pow(half4 x, half4 y); fixed pow(fixed x, fixed y); fixed1 pow(fixed1 x, fixed1 y); fixed2 pow(fixed2 x, fixed2 y); fixed3 pow(fixed3 x, fixed3 y); fixed4 pow(fixed4 x, fixed4 y); </PRE> <H1><A NAME="PARAMETERS"><A NAME="3">PARAMETERS </A></A></H1> <DL> <DT><STRONG>x </STRONG></DT> <DD> <P> A base value. </P> <DT><STRONG>y </STRONG></DT> <DD> <P> The power to raise the base. </P> </DD></DL> <H1><A NAME="DESCRIPTION"><A NAME="4">DESCRIPTION </A></A></H1> <P> Returns <I>x</I> to the power <I>y</I>. </P> <P> For vectors, the returned vector contains the power of each element of the base vector raised to the respective element of the exponent vector. </P> <H1><A NAME="REFERENCE_IMPLEMENTATION"><A NAME="5">REFERENCE IMPLEMENTATION </A></A></H1> <P> <B>pow</B> for <B>float3</B> vectors could be implemented this way: </P> <PRE> float3 pow(float3 x, float3 y) { float3 rv; for (int i=0; i<3; i++) { rv[i] = exp(x[i] * log(y[i])); } return rv; } </PRE> <H1><A NAME="PROFILE_SUPPORT"><A NAME="6">PROFILE SUPPORT </A></A></H1> <P> <B>exp</B> is supported in all profiles. </P> <P> Support in the <A HREF="fp20.html">fp20</A> is limited to constant compile-time evaluation. </P> <H1><A NAME="SEE_ALSO"><A NAME="7">SEE ALSO </A></A></H1> <P> <A HREF="exp.html"><I>exp</I></A>, <A HREF="lit.html"><I>lit</I></A>, <A HREF="log.html"><I>log</I></A>, <A HREF="rsqrt.html"><I>rsqrt</I></A>, <A HREF="sqrt.html"><I>sqrt</I></A> </P> </BLOCKQUOTE> </BODY>