sc::SCMatrix3(3)

✨ NAME ✨

sc::SCMatrix3 — bestie it's a 3×3 matrix class from the MPQC library (this is the Library Functions Manual page, page sc::SCMatrix3(3), in case u were wondering where u are 💅)

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🦋 SYNOPSIS 🦋

okay so here's the whole squad of public member functions, no gatekeeping:

SCMatrix3 (const SCMatrix3 &)
SCMatrix3 (const RefSCMatrix3 &)
SCMatrix3 (double x[9])
SCMatrix3 (const SCVector3 &p1, const SCVector3 &p2, const SCVector3 &p3)
SCMatrix3 & operator= (const SCMatrix3 &)
SCMatrix3 operator* (double) const
SCMatrix3 operator* (const SCMatrix3 &) const
SCVector3 operator* (const SCVector3 &v) const
SCMatrix3 operator+ (const SCMatrix3 &) const
SCMatrix3 operator- (const SCMatrix3 &) const
double & elem (int i, int j)
const double & elem (int i, int j) const
double & elem (int i)
const double & elem (int i) const
double & operator[] (int i)
const double & operator[] (int i) const
double & operator() (int i, int j)
const double & operator() (int i, int j) const
const double * data () const
void print (std::ostream &=ExEnv::out0()) const

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💖 DESCRIPTION 💖

so like. it's sc::SCMatrix3. a 3×3 matrix. that's the vibe. she's small, she's mighty, she's the main character of ur little corner of linear algebra 🌸

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👑 PUBLIC MEMBER FUNCTIONS 👑

the way that this class has SO many ways to be constructed and indexed... it's giving overachiever and honestly? we love that for her 💜

🎀 Constructors — pick ur fighter

• SCMatrix3 (const SCMatrix3 &) — copy constructor bestie. makes a whole new SCMatrix3 that's a twin of an existing one. slay ✨
• SCMatrix3 (const RefSCMatrix3 &) — builds one from a RefSCMatrix3. yes she can do that too.
• SCMatrix3 (double x[9]) — feed her an array of double and she'll become a matrix. nine of them. that's the whole thing 🔥
• SCMatrix3 (const SCVector3 &p1, const SCVector3 &p2, const SCVector3 &p3) — three SCVector3s walk into a bar and out comes a SCMatrix3. iconic behavior honestly 🫶

🌈 Assignment

• SCMatrix3 & operator= (const SCMatrix3 &) — the classic. takes another SCMatrix3 and copies it right on over. no cap 💅

⭐ Math Time (the fun part)

• SCMatrix3 operator* (double) const — scale her by a double, get a fresh SCMatrix3 back. math but make it cute.
• SCMatrix3 operator* (const SCMatrix3 &) const — matrix times matrix. she said "i contain multitudes" and multiplied 🧚
• SCVector3 operator* (const SCVector3 &v) const — matrix times SCVector3 v, and u get an SCVector3 back. transformation era 💫
• SCMatrix3 operator+ (const SCMatrix3 &) const — adding two SCMatrix3s together. wholesome.
• SCMatrix3 operator- (const SCMatrix3 &) const — subtracting one SCMatrix3 from another. it's giving subtraction but make it personal 😭

🍓 Element Access — the many doors to the same room

not me realizing there are literally four different ways to grab an element. obsessed.

• double & elem (int i, int j) — hand over i and j and get a mutable reference to that element. go off, change it, live ur truth 💖
• const double & elem (int i, int j) const — same i, j situation but read-only. look but don't touch bestie.
• double & elem (int i) — just one index i, still a mutable reference. she's flexible like that.
• const double & elem (int i) const — one index, read-only, no funny business.
• double & operator[] (int i) — bracket notation, mutable reference. very coder-core of her.
• const double & operator[] (int i) const — bracket notation but read-only. the const version said "i'm just here to look cute" 💅
• double & operator() (int i, int j) — call her like a function with i and j, get a mutable reference. function-call syntax in a matrix?? she contains multitudes fr fr.
• const double & operator() (int i, int j) const — same call syntax, i and j, read-only. periodt.

🦄 Data + Output

• const double * data () const — hands u a const double * pointing at the raw data. peek behind the curtain, but respectfully — it's const, so no editing 🙈
• void print (std::ostream &=ExEnv::out0()) const — prints her out. and yes, the stream argument defaults to ExEnv::out0() so if u don't pass one she'll just use that. queen of convenience 👑

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🌸 AUTHOR 🌸

Generated automatically by Doxygen for MPQC from the source code. (so if u have beef with the docs, take it up with Doxygen, not me 🫶)

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that's the whole page bestie, every single member function accounted for, nothing skipped, nothing invented. iykyk 💜

and that's a wrap ✨ this was sc::SCMatrix3(3) from MPQC, Version 2.3.1 — stay iconic, stay const-correct, and go build urself a 3×3 matrix 🎀🦋💅