GRAPHADD(3)

🎀 GRAPHADD(3) 🎀

okay bestie, so this is a page from the Library Functions Manual and it's all about graphadd — the lil extra bundle of 3d graphics goodies plus the matrix and vector routines that ride along with it. grab a strawberry drink, we're going in 💖

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✨ NAME ✨

v_print2, v_print3, m_print2, m_print3, v_scan2, v_scan3, v_inters2, v_dupl2, v_dupl3, m_dupl2, m_dupl3 — additional 3d graphics and associated matrix and vector routines 🌸

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✨ SYNOPSIS ✨

#include <graphadd.h>

void      v_print2(hvec2_t vec, const char *name)

void      v_print3(hvec3_t vec, const char *name)

void      m_print2(hmat2_t mat, const char *name)

void      m_print3(hmat3_t mat, const char *name)

int v_scan2(hvec2_t &vec)

int v_scan3(hvec3_t &vec)

int v_inters2(
const hvec2_t &p1, const hvec2_t &p2, const hvec2_t &q1,
const hvec2_t &q2, hvec2_t *S1, hvec2_t *S2)

void v_dupl2(hvec2_t *, hvec2_t *)

void v_dupl3(hvec3_t *, hvec3_t *)

void m_dupl2(hmat2_t *, hmat2_t *)

void m_dupl3(hmat3_t *, hmat3_t *)

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💅 DESCRIPTION 💅

So these routines are an addition to grapmat(3) — think of them as the bonus tracks on the album, no skips 🎵

• The *print routines print the appropriate data to stderr. yes bestie, stderr, not stdout, don't come for me, that's just the vibe.
• The *scan routines read from stdin. 👑
• The *dupl routines copy data. simple, iconic, does exactly what it says on the tin ✨

And then there's the main character, v_inters2. she returns the intersection point of p1,p2 and q1,q2 in S1 and S2. the return value is:

• 0 — if no intersection point is found 😭
• 1 — if there is an intersection point 🫶
• 2 — if the two lines do overlap. and in that case, the two points are the extrema. periodt. 💅

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🌈 NAMES 🌈

naming conventions are the same as in graphmat(3). iykyk, no need to reinvent the wheel, she's consistent 💖

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🦋 USAGE 🦋

ok this part is important, listen up bestie 👂

All the "functions" may have been implemented as macro's, so you can't take the address of a function. that's just how it is, no cap.

It is however guaranteed that arguments of each function/macro will be evaluated only once — except for the result argument, which can be evaluated multiple times. so like, be chill about the side effects on that one, okay? 🙈

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⭐ SEE ALSO ⭐

• graphmat(3)
• graphmat++(3)
• Graphics and matrix routines.

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🎀 NOTE 🎀

Only available in C++ and ANSI C. v_inters2 only in C++ 🫶

Library file is /usr/local/lib/libgraphmat.a and the C++ util files. ✨

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👑 AUTHOR 👑

• Herbert Hilhorst
• Klamer Schutte

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and that's the whole page, bestie, you ate it 💅✨ this lil masterpiece is dated 9 September 1992, and it lives in the Library Functions Manual as GRAPHADD(3) — go forth and intersect some lines fr fr 🌸🦋