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floor.3Cg

Langue: en

Version: 349582 (ubuntu - 24/10/10)

Section: 3 (Bibliothèques de fonctions)

floor - returns largest integer not greater than a scalar or each vector component.

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

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

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

Returns the floor or largest integer not greater than a scalar or each vector component.

floor for a float3 vector could be implemented like this.

   float3 floor(float3 v)
   {
     float3 rv;
     int i;

     for (i=0; i<3; i++) {
       rv[i] = v[i] - frac(v[i]);
     }
     return rv;
   }

floor is supported in all profiles except fp20.