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Update short_antenna.html

pull/2/head
miguel 2023-03-21 23:42:19 +11:00
rodzic 3a204e2ef9
commit 5cdf87bf86
1 zmienionych plików z 18 dodań i 23 usunięć
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short_antenna.html
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@ -304,13 +304,6 @@
ctx.stroke();
}
function getFeetAndInchesFromMeters(inMeters) {
//
var inFeet = Math.trunc(inMeters * 3.28084);
var inchesLeft = (inMeters - (inFeet / 3.28084)) * 39.37008;
return inFeet.toString() + inchesLeft.toFixed(2).toString();
}
function getFeetAndInchesFromFeet(inFeet) {
//
var wholeFeet = Math.trunc(inFeet);
@ -366,27 +359,31 @@
const d_pos = up_wire_bot_y - dipole.spacing_ratio * (up_wire_bot_y - up_wire_top_y);
fctx.textAlign = "right";
// Draw top inductor:
drawInductor(fctx, wire_x, d_pos, 0.0*Math.PI);
drawArrow(fctx, wire_x - 30, d_pos, 0.5*Math.PI);
fctx.fillText(dipole.distance_meters.toFixed(2).toString() + " m", wire_x - 60, d_pos + 12 );
//fctx.fillText(dipole.distance_feet.toFixed(2).toString() + " ft", wire_x - 60, d_pos - 4);
fctx.fillText(getFeetAndInchesFromFeet(dipole.distance_feet), wire_x - 60, d_pos - 4);
fctx.fillText(dipole.distance_feet.toFixed(2).toString() + " ft", wire_x - 60, d_pos - 4);
//fctx.fillText(getFeetAndInchesFromFeet(dipole.distance_feet), wire_x - 60, d_pos - 4);
// Draw midpoint arrow:
drawArrow(fctx, wire_x - 30, up_wire_bot_y, 0.5*Math.PI);
fctx.fillText("0.00", wire_x - 60, up_wire_bot_y + 5);
//fctx.fillText("0.00 m", wire_x - 60, up_wire_bot_y + 18);
drawArrow(fctx, wire_x - 30, up_wire_top_y, 0.5*Math.PI);
//fctx.fillText((dipole.length_feet * 0.5).toFixed(2).toString() + " ft", wire_x - 60, up_wire_top_y - 4);
fctx.fillText(getFeetAndInchesFromFeet(dipole.length_feet * 0.5), wire_x - 60, up_wire_top_y - 4);
// Draw top-left arrow and associated text:
drawArrow(fctx, wire_x - 30, up_wire_top_y, 0.5*Math.PI);
fctx.fillText((dipole.length_feet * 0.5).toFixed(2).toString() + " ft", wire_x - 60, up_wire_top_y - 4);
//fctx.fillText(getFeetAndInchesFromFeet(dipole.length_feet * 0.5), wire_x - 60, up_wire_top_y - 4);
fctx.fillText((dipole.length_meters * 0.5).toFixed(2).toString() + " m", wire_x - 60, up_wire_top_y + 12);
fctx.textAlign = "left";
//fctx.fillText(dipole.length_feet.toFixed(2).toString() + " ft", wire_x + 60, up_wire_top_y - 4);
fctx.fillText(getFeetAndInchesFromFeet(dipole.length_feet), wire_x + 60, up_wire_top_y - 4);
fctx.fillText(dipole.length_feet.toFixed(2).toString() + " ft", wire_x + 60, up_wire_top_y - 4);
//fctx.fillText(getFeetAndInchesFromFeet(dipole.length_feet), wire_x + 60, up_wire_top_y - 4);
fctx.fillText(dipole.length_meters.toFixed(2).toString() + " m", wire_x + 60, up_wire_top_y + 12);
//fctx.fillText("0.00 ft", wire_x + 60, down_wire_bot_y );
fctx.fillText("0.00", wire_x + 60, down_wire_bot_y + 5);
//drawArrow(fctx, wire_x + 10, up_wire_bot_y, -0.5*Math.PI);
fctx.font = emphasis_font;
fctx.fillText("L = " + dipole.L.toFixed(1).toString() + " \u00B5H", wire_x + 30, d_pos - 4);
fctx.font = normal_font;
@ -404,14 +401,12 @@
fctx.fillText("\u2300 = " + cond_diameter_inches.toFixed(4).toString() + "\" " +
"(" + cond_diameter_mm.toFixed(3).toString() + " mm)", left_spacing, down_wire_bot_y);
//fctx.textAlign = "center";
//fctx.fillText("f = " + (dipole.frequency_hz * 1e-6).toFixed(2).toString() + " MHz", wire_x, down_wire_bot_y + 30);
// Draw bottom inductor:
drawInductor(fctx, wire_x, down_wire_top_y + dipole.spacing_ratio * (up_wire_bot_y - up_wire_top_y), 0.0*Math.PI);
//drawArrow(fctx, wire_x + 10, down_wire_top_y, -0.5*Math.PI);
drawArrow(fctx, wire_x + 30, down_wire_bot_y, -0.5*Math.PI);
// Draw arrows on the right side of the antenna, to depict full dipole length:
drawArrow(fctx, wire_x + 30, up_wire_top_y, -0.5*Math.PI);
drawArrow(fctx, wire_x + 30, down_wire_bot_y, -0.5*Math.PI);
}
recalculate();
drawDesign();