70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
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#include <stdio.h>
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#include <math.h>
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#include <hexagram/gauge.h>
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#include <hexagram/speedo.h>
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void hexagram_speedo_draw_face(cairo_t *cr,
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double x,
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double y,
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double r) {
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int i;
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cairo_select_font_face(cr, "Helvetica",
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CAIRO_FONT_SLANT_NORMAL,
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CAIRO_FONT_WEIGHT_NORMAL);
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cairo_set_font_size(cr, r * 0.125);
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cairo_set_source_rgb(cr, 1, 1, 1);
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cairo_arc(cr, x, y, r, 0, 2*M_PI);
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cairo_stroke(cr);
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/*
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* Draw face numbers
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*/
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for (i=0; i<=180; i+=20) {
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char text[5];
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snprintf(text, 4, "%02d", i);
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hexagram_gauge_draw_number(cr, x, y,
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0.85 * r,
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232 * (M_PI/180),
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488 * (M_PI/180),
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i / 180.0,
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text);
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}
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for (i=0; i<=180; i+=2) {
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hexagram_gauge_draw_mark(cr, x, y,
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((i % 10)? 0.75: 0.7) * r,
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0.8 * r,
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232 * (M_PI/180),
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488 * (M_PI/180),
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i / 180.0);
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}
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}
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void hexagram_speedo_draw_needle(cairo_t *cr,
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double x,
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double y,
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double r,
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double kph) {
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if (kph > 290) {
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kph = 290;
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}
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/*
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* Draw a tiny boi circle
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*/
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cairo_set_source_rgb(cr, 1, 1, 1);
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cairo_arc(cr, x, y, 0.08 * r, 0, 2*M_PI);
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cairo_stroke(cr);
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hexagram_gauge_draw_needle(cr, x, y, 0.8 * r,
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232 * (M_PI/180),
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488 * (M_PI/180),
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kph / 290);
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}
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