56 lines
2.4 KiB
Matlab
56 lines
2.4 KiB
Matlab
function fig_geo_q2_safe_disk()
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%FIG_GEO_Q2_SAFE_DISK 问题二：截断角域外接圆与保证接收的安全候选盘。
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S = fig_style();
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D = load_data(S, 'geo_q2');
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H = geom_helpers();
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fig = figure('Color', 'w', 'Visible', 'off');
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t = tiledlayout(fig, 1, 2, 'TileSpacing', 'compact', 'Padding', 'compact');
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% 左：真实几何（Ω 内的角域与两个候选圆）
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ax1 = nexttile(t);
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hold(ax1, 'on');
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H.circle(ax1, [0 0], D.omega_r, pick_color(S, 'primary'), 1.2, '-');
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hw = H.wedge(ax1, D.wedge, pick_color(S, 'accent'), 0.25);
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hd = H.circle(ax1, D.c, D.a, pick_color(S, 'violet'), 1.2, '--');
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hs = H.disk(ax1, D.c, D.safe, pick_color(S, 'success'), 0.30, '-');
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H.marker(ax1, [0 0], pick_color(S, 'accent'), 6, true);
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H.marker(ax1, D.c, pick_color(S, 'violet'), 5, true);
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H.label_points(ax1, [0 0], {'s1'}, pick_color(S, 'accent'));
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H.label_points(ax1, D.c, {'c'}, pick_color(S, 'violet'));
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hold(ax1, 'off');
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axis(ax1, 'equal');
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xlim(ax1, [-D.half, D.half]);
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ylim(ax1, [-D.half, D.half]);
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xlabel(ax1, 'x / m');
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ylabel(ax1, 'y / m');
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legend(ax1, [hw, hd, hs], D.legend, 'Location', 'southoutside', ...
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'Orientation', 'horizontal');
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% 右：半径分解 a + (1000 − a) = 1000 m
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ax2 = nexttile(t);
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hold(ax2, 'on');
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H.circle(ax2, [0 0], D.a, pick_color(S, 'violet'), 1.2, '--');
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H.disk(ax2, [0 0], D.safe, pick_color(S, 'success'), 0.30, '-');
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H.marker(ax2, [0 0], 'k', 5, true);
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ang = deg2rad(35);
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p_out = D.a * [cos(ang), sin(ang)];
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p_in = D.safe * [cos(-ang), sin(-ang)];
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H.arrow(ax2, [0 0], p_out, pick_color(S, 'violet'));
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H.arrow(ax2, [0 0], p_in, pick_color(S, 'success'));
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text(ax2, p_out(1) * 1.06, p_out(2) * 1.12, sprintf('a = %.1f m', D.a), ...
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'Color', pick_color(S, 'violet'), 'Interpreter', 'none');
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text(ax2, p_in(1) * 1.04, p_in(2) * 1.30, sprintf('1000 − a = %.1f m', D.safe), ...
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'Color', pick_color(S, 'success'), 'HorizontalAlignment', 'right', ...
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'Interpreter', 'none');
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text(ax2, -D.safe * 0.45, 0, 'c', 'Color', 'k', ...
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'HorizontalAlignment', 'right', 'VerticalAlignment', 'middle');
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hold(ax2, 'off');
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axis(ax2, 'equal');
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xlim(ax2, [-D.a * 1.15, D.a * 1.75]);
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ylim(ax2, [-D.a * 1.05, D.a * 1.05]);
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axis(ax2, 'off');
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fig_save(fig, S, 'geo-q2-guaranteed-reception-disk.png');
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end
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