1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
//
// GENERATED FILE
//
use super::*;
use crate::SpiceContext;
use f2rust_std::*;
/// Vector linear combination, general dimension
///
/// Compute a vector linear combination of two double precision
/// vectors of arbitrary dimension.
///
/// # Brief I/O
///
/// ```text
/// VARIABLE I/O DESCRIPTION
/// -------- --- --------------------------------------------------
/// N I Dimension of vector space.
/// A I Coefficient of V1.
/// V1 I Vector in N-space.
/// B I Coefficient of V2.
/// V2 I Vector in N-space.
/// SUM O Linear vector combination A*V1 + B*V2.
/// ```
///
/// # Detailed Input
///
/// ```text
/// N is the dimension of V1, V2 and SUM.
///
/// A is the double precision scalar variable that multiplies
/// V1.
///
/// V1 is an arbitrary, double precision n-dimensional vector.
///
/// B is the double precision scalar variable that multiplies
/// V2.
///
/// V2 is an arbitrary, double precision n-dimensional vector.
/// ```
///
/// # Detailed Output
///
/// ```text
/// SUM is the double precision n-dimensional vector which
/// contains the linear combination
///
/// A * V1 + B * V2
/// ```
///
/// # Exceptions
///
/// ```text
/// Error free.
/// ```
///
/// # Particulars
///
/// ```text
/// The code reflects precisely the following mathematical expression
///
/// For each value of the index I, from 1 to N:
///
/// SUM(I) = A * V1(I) + B * V2(I)
///
/// No error checking is performed to guard against numeric overflow.
/// ```
///
/// # Examples
///
/// ```text
/// The numerical results shown for this example may differ across
/// platforms. The results depend on the SPICE kernels used as
/// input, the compiler and supporting libraries, and the machine
/// specific arithmetic implementation.
///
/// 1) Perform the projection of a 4-dimensional vector into a
/// 2-dimensional plane in 4-space.
///
///
/// Example code begins here.
///
///
/// PROGRAM VLCOMG_EX1
/// IMPLICIT NONE
///
/// C
/// C SPICELIB functions.
/// C
/// DOUBLE PRECISION VDOTG
///
/// C
/// C Local parameters.
/// C
/// INTEGER NDIM
/// PARAMETER ( NDIM = 4 )
///
/// C
/// C Local variables.
/// C
/// DOUBLE PRECISION PUV ( NDIM )
/// DOUBLE PRECISION X ( NDIM )
/// DOUBLE PRECISION U ( NDIM )
/// DOUBLE PRECISION V ( NDIM )
///
/// C
/// C Let X be an arbitrary NDIM-vector
/// C
/// DATA X / 4.D0, 35.D0, -5.D0, 7.D0 /
///
/// C
/// C Let U and V be orthonormal NDIM-vectors spanning the
/// C plane of interest.
/// C
/// DATA U / 0.D0, 0.D0, 1.D0, 0.D0 /
///
/// V(1) = SQRT(3.D0)/3.D0
/// V(2) = -SQRT(3.D0)/3.D0
/// V(3) = 0.D0
/// V(4) = SQRT(3.D0)/3.D0
///
/// C
/// C Compute the projection of X onto this 2-dimensional
/// C plane in NDIM-space.
/// C
/// CALL VLCOMG ( NDIM, VDOTG ( X, U, NDIM), U,
/// . VDOTG ( X, V, NDIM), V, PUV )
///
/// C
/// C Display the results.
/// C
/// WRITE(*,'(A,4F6.1)') 'Input vector : ', X
/// WRITE(*,'(A,4F6.1)') 'Projection into 2-d plane: ', PUV
///
/// END
///
///
/// When this program was executed on a Mac/Intel/gfortran/64-bit
/// platform, the output was:
///
///
/// Input vector : 4.0 35.0 -5.0 7.0
/// Projection into 2-d plane: -8.0 8.0 -5.0 -8.0
/// ```
///
/// # Restrictions
///
/// ```text
/// 1) No error checking is performed to guard against numeric
/// overflow or underflow. The user is responsible for insuring
/// that the input values are reasonable.
/// ```
///
/// # Author and Institution
///
/// ```text
/// J. Diaz del Rio (ODC Space)
/// W.L. Taber (JPL)
/// ```
///
/// # Version
///
/// ```text
/// - SPICELIB Version 1.1.0, 13-AUG-2021 (JDR)
///
/// Added IMPLICIT NONE statement.
///
/// Edited the header to comply with NAIF standard. Removed
/// unnecessary $Revisions section.
///
/// Added complete code example based on existing example.
///
/// - SPICELIB Version 1.0.1, 10-MAR-1992 (WLT)
///
/// Comment section for permuted index source lines was added
/// following the header.
///
/// - SPICELIB Version 1.0.0, 31-JAN-1990 (WLT)
/// ```
pub fn vlcomg(n: i32, a: f64, v1: &[f64], b: f64, v2: &[f64], sum: &mut [f64]) {
VLCOMG(n, a, v1, b, v2, sum);
}
//$Procedure VLCOMG ( Vector linear combination, general dimension )
pub fn VLCOMG(N: i32, A: f64, V1: &[f64], B: f64, V2: &[f64], SUM: &mut [f64]) {
let V1 = DummyArray::new(V1, 1..=N);
let V2 = DummyArray::new(V2, 1..=N);
let mut SUM = DummyArrayMut::new(SUM, 1..=N);
//
// Local variables
//
for I in 1..=N {
SUM[I] = ((A * V1[I]) + (B * V2[I]));
}
}