PLSCMAP1A(3plplot)

💅 PLSCMAP1A (3plplot) ✨

okay so bestie, buckle up — this page is literally the PLplot API lore for plscmap1a, and it's giving "make your colors see-through but gorgeous." no cap, let's get into it 🫶

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🌸 NAME 🌸

plscmap1a — set semitransparent cmap1 RGBA colors. that's it, that's the whole vibe 💖

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✨ SYNOPSIS ✨

plscmap1a(r, g, b, alpha, ncol1)

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🎀 DESCRIPTION 🎀

So what this does is set semitransparent cmap1 colors (peep the PLplot documentation for the full tea ☕) using RGBA vector values. and — super important — this function also sets the number of cmap1 colors. two things, one call, main character energy 👑

N.B. (and this part is lowkey the whole plot twist): continuous cmap1 colors get indexed with a floating-point index in the range from 0.0-1.0, and that gets linearly transformed (like, for example, by plcol1(3plplot)) into an integer index of these RGBA vectors in the range from 0 to ncol1-1.

So for this continuous color model to actually work properly, it is the responsibility of the user of plscmap1(3plplot) to insure that these RGBA vectors are continuous functions of their integer indices. like, that's on you, bestie 🫵😭 nobody's gonna do the vibe check for you.

Redacted form: plscmap1a(r, g, b, alpha)

This function is used in example 31. periodt. 🔥

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🦋 ARGUMENTS 🦋

• r (PLINT_VECTOR(3plplot), input) — a vector that represents (using unsigned 8-bit integers in the range from 0-255) the degree of red in the color as a continuous function of the integer index of the vector. the red girlie of the trio 💃
• g (PLINT_VECTOR(3plplot), input) — a vector that represents (using unsigned 8-bit integers in the range from 0-255) the degree of green in the color as a continuous function of the integer index of the vector. slay in green 🌿
• b (PLINT_VECTOR(3plplot), input) — a vector that represents (using unsigned 8-bit integers in the range from 0-255) the degree of blue in the color as a continuous function of the integer index of the vector. blue era 💙
• alpha (PLFLT_VECTOR(3plplot), input) — a vector that represents (using PLFLT values in the range from 0.0-1.0, where 0.0 corresponds to completely transparent and 1.0 corresponds to completely opaque) the alpha transparency of the color as a continuous function of the integer index of the vector. so 0.0 is ghost mode 👻 and 1.0 is fully there, no notes 💅
• ncol1 (PLINT(3plplot), input) — number of items in the r, g, b, and alpha vectors. all four, same count, keep them matching bestie 🙈

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👑 AUTHORS 👑

Many developers (who are credited at http://plplot.sourceforge.net/credits.php) have contributed to PLplot over its long history. like, a whole squad, a whole legacy, the way that they built this over years — obsessed 🧚💜

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🌈 SEE ALSO 🌈

PLplot documentation at http://plplot.sourceforge.net/documentation.php. go read it, iykyk 📚✨

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and that's the whole page, bestie 💖 this one comes from the PLplot API manual, version/date stamp of August, 2026, and the source line is literally just PLSCMAP1A(3plplot) — so like, we came full circle 🎀🫶 bye bestie, go make something semitransparent and iconic 💅⭐