struct appin
{
    float3 position  : POSITION;
    float3 normal    : NORMAL;
    float2 texcoord0 : TEXCOORD0;
};

struct vertout
{
      float4 position  : POSITION;
      float4 color0    : COLOR0;
    float2 texcoord0 : TEXCOORD0;
};

//-----------------------------------------------------------------------------
// IN                  = Incoming per-vertex data to be processed
// modelViewProjection = Combined model-view-projection matrix
// currentAngle        = A value that goes from 0 to 360 and repeats
//-----------------------------------------------------------------------------
vertout main( appin IN, 
              uniform float4x4 modelViewProjection,
              uniform float4 currentAngle )
{
      vertout OUT;

      float4 v = float4( IN.position.x, IN.position.y, IN.position.z, 1.0f );
    
   
    v.y  = sin( IN.position.x + currentAngle.x );
    v.y += sin( IN.position.z + currentAngle.x );
    v.y *= IN.position.x * 0.08f;

      OUT.position = mul( modelViewProjection, v );

    OUT.color0    = float4( 1.0f, 1.0f, 1.0f, 1.0f );
      OUT.texcoord0 = IN.texcoord0;

      return OUT;
}