Simplify Phytagoras in the wave shader(s)

pow() is expensive and abs() is redundand.
pow(abs(x),2) equals x*x

Shaders/bowwave.frag

@@ -54,8 +54,8 @@ void relWind(out float rel_wind_speed_kts, out float rel_wind_from_rad)
     float rel_wind_speed_from_north_kts = WindN*fps2kts + speed_north_kts;
 
     //combine relative speeds north and east to get relative windspeed in kts
-    rel_wind_speed_kts = sqrt(pow(abs(rel_wind_speed_from_east_kts), 2) 
-        + pow(abs(rel_wind_speed_from_north_kts), 2));
+    rel_wind_speed_kts = sqrt(rel_wind_speed_from_east_kts*rel_wind_speed_from_east_kts
+        + rel_wind_speed_from_north_kts*rel_wind_speed_from_north_kts);
 
     //calculate the relative wind direction
     float rel_wind_from_deg = degrees(atan(rel_wind_speed_from_east_kts, rel_wind_speed_from_north_kts));

Shaders/water.frag

@@ -72,7 +72,7 @@ void main(void)
     //bool Status = true;
 
 
-    float windEffect = sqrt(pow(abs(WindE),2)+pow(abs(WindN),2)) * 0.6; 				//wind speed in kt
+    float windEffect = sqrt( WindE*WindE + WindN*WindN ) * 0.6; 				//wind speed in kt
     float windScale = 15.0/(3.0 + windEffect);											//wave scale
     float windEffect_low = 0.3 + 0.7 * smoothstep(0.0, 5.0, windEffect);				//low windspeed wave filter
     float waveRoughness = 0.05 + smoothstep(0.0, 20.0, windEffect);						//wave roughness filter

Shaders/water_sine.frag

@@ -143,7 +143,7 @@ void main(void)
 	float cover = 0.0;
 	//bool Status = true;
 
-	float windEffect = sqrt(pow(abs(WindE),2)+pow(abs(WindN),2)) * 0.6; 				//wind speed in kt
+	float windEffect = sqrt( WindE*WindE + WindN*WindN ) * 0.6; 				//wind speed in kt
 	float windScale =  15.0/(3.0 + windEffect);             											//wave scale
 	float windEffect_low = 0.3 + 0.7 * smoothstep(0.0, 5.0, windEffect);    				//low windspeed wave filter
 	float waveRoughness = 0.01 + smoothstep(0.0, 40.0, windEffect);						//wave roughness filter