FUNCTION dot_product
(* SCHEMA STRUCTURAL_FRAME_SCHEMA; *)
FUNCTION dot_product
(arg1, arg2 : direction) : REAL;
LOCAL
scalar : REAL;
vec1, vec2: direction;
ndim : INTEGER;
END_LOCAL;
IF NOT EXISTS (arg1) OR NOT EXISTS (arg2) THEN
scalar := ?;
ELSE
IF (arg1.dim <> arg2.dim) THEN
scalar := ?;
ELSE
BEGIN
vec1 := normalise(arg1);
vec2 := normalise(arg2);
ndim := arg1.dim;
scalar := 0.0;
REPEAT i := 1 TO ndim;
scalar := scalar + vec1.direction_ratios[i]*vec2.direction_ratios[i];
END_REPEAT;
END;
END_IF;
END_IF;
RETURN (scalar);
END_FUNCTION; (* STEP Part 42 (unchanged in 2nd edition) *)
Referenced By
Defintion dot_product is references by the following definitions:
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2023-03-25T00:11:39-04:00