main/src/georegression/geometry/UtilLine2D_F64.java
public static LineGeneral2D_F64 convert( LineParametric2D_F64 src , LineGeneral2D_F64 ret ) {
		if( ret == null ) {
			ret = new LineGeneral2D_F64();
		}

		ret.A = -src.slope.y;
		ret.B = src.slope.x;
		ret.C = -ret.A*src.p.x - ret.B*src.p.y;

		return ret;
	}
public static LineGeneral2D_F64 convert( LineParametric2D_F64 src , LineGeneral2D_F64 ret ) {
		if( ret == null ) {
			ret = new LineGeneral2D_F64();
		}

		ret.A = -src.slope.y;
		ret.B = src.slope.x;
		ret.C = -ret.A*src.p.x - ret.B*src.p.y;

		return ret;
	}
Converts a line from parametric to general

@param src (input) line in parametric notation.
@param ret (output) line in general notation.  If null a new instance will be created.
@return Converted line in general notation