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112 lines
2.9 KiB
Plaintext
112 lines
2.9 KiB
Plaintext
from settings access outformat;
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outformat="pdf";
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unitsize(1mm);
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int pgw = 210;
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int pgh = 297;
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size(pgw, pgh);
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int sqsz = pgw;
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// C6: 114 x 162 mm
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int envh = 114;
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int envw = 162;
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string envfmt = "C6";
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// A6: 105 x 148 mm
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// debugging tool
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bool with_labels = true;
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// It is unpractical to try emulating second quadrant. We will work in the
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// first quadrant with the origin at the bottom-left corner of the square (not
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// the whole page). Therefore, the bottom edge of the page is at y=(210-297)
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int pgbot = 210-297;
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//Force A4 size
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//draw((0,pgbot) -- (0, sqsz) -- (sqsz, sqsz) -- (sqsz, pgbot) -- cycle, invisible);
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// gimme a square?
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if (with_labels) draw(box((0,0), (210,210)), p=red);
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pair envc = (sqsz/2, sqsz/2);
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// Write a paper type to the image?
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label(rotate(45)*scale(4)*Label(envfmt, envc, p=gray));
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pair corn_vec = unit((1,1)) * (envw/2) + unit((1,-1)) * (envh/2);
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pair flip(pair p) {
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return p - unit((1, -1)) * envh;
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}
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pair[] corners = {
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envc + corn_vec,
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envc + flip(corn_vec),
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envc - corn_vec,
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envc - flip(corn_vec),
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};
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// Draw the base rectangle
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draw(corners[0] -- corners[1] -- corners[2] -- corners[3] -- cycle, p=gray+dashed);
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if (with_labels) {
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label("$E_0$", corners[0]);
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label("$E_1$", corners[1]);
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label("$E_2$", corners[2]);
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label("$E_3$", corners[3]);
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}
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// Enlarge the sides:
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//llba: line at left bottom, A side
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pair llba = (1, 1);
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real llbb = dot(llba, corners[2]);
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pair llta = (1, -1);
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real lltb = dot(llta, corners[2]);
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pair lrba = (1, -1);
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real lrbb = dot(lrba, corners[0]);
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pair lrta = (1, 1);
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real lrtb = dot(lrta, corners[0]);
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pair lineinters(pair l1a, real l1b, pair l2a, real l2b) {
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// For some reason, solve does not like having the matrices right in the
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// parameters? (Or I made a stupid error in parentheses…)
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real[][] a = {{l1a.x, l1a.y}, {l2a.x, l2a.y}};
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real[] b = {l1b, l2b};
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real[] solution = solve(a,b);
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return (solution[0], solution[1]);
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}
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// Cutouts at all the sides:
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// Left: (cutout left first point)
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// Left edge: x = 0 = 1x + 0y
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pair cl1 = lineinters(llba, llbb, (1, 0), 0);
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pair cl2 = lineinters(llta, lltb, (1, 0), 0);
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// right
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pair cr1 = lineinters(lrba, lrbb, (1, 0), sqsz);
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pair cr2 = lineinters(lrta, lrtb, (1, 0), sqsz);
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// bottom
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pair cb1 = lineinters(llba, llbb, (0, 1), 0);
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pair cb2 = lineinters(lrba, lrbb, (0, 1), 0);
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// top
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pair ct1 = lineinters(llta, lltb, (0, 1), sqsz);
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pair ct2 = lineinters(lrta, lrtb, (0, 1), sqsz);
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if (with_labels) {
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label("$CL_1$", cl1);
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label("$CL_2$", cl2);
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label("$CR_1$", cr1);
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label("$CR_2$", cr2);
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label("$CT_1$", ct1);
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label("$CT_2$", ct2);
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label("$CB_1$", cb1);
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label("$CB_2$", cb2);
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}
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// We do not make the envelope fully symmetric, instead we trim the side
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// lobes near the cover.
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cr1 = (corners[0].x, sqsz);
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cb2 = (0, corners[3].y);
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// Draw the cutouts
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draw(cl1 -- corners[2] -- cl2);
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draw(cr1 -- corners[0] -- cr2);
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draw(cb1 -- corners[3] -- cb2);
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draw(ct1 -- corners[1] -- ct2);
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