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*Strong Bad and The Cheat sit at a cardboard box*

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XANTRONIX Development 2019-06-07 17:39:23 -05:00
parent fcde71a902
commit 09d33177ce
1 changed files with 63 additions and 2 deletions
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65
examples/cluster.c
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@ -60,6 +60,27 @@ static void draw_face_number(cairo_t *cr,
cairo_restore(cr);
}
static void draw_face_mark(cairo_t *cr,
double x,
double y,
double min_r,
double max_r,
double min_angle,
double max_angle,
double value) {
double angle = min_angle + ((max_angle - min_angle) * value) - (M_PI/2);
cairo_move_to(cr,
x + min_r * cos(angle),
y + min_r * sin(angle));
cairo_line_to(cr,
x + max_r * cos(angle),
y + max_r * sin(angle));
cairo_stroke(cr);
}
static void draw_tachometer_needle(cairo_t *cr,
double x,
double y,
@ -85,7 +106,8 @@ static void draw_tachometer_needle(cairo_t *cr,
static void draw_tachometer(cairo_t *cr,
double x,
double y,
double r) {
double r,
double redline) {
int i;
cairo_select_font_face(cr, "Helvetica",
@ -112,6 +134,26 @@ static void draw_tachometer(cairo_t *cr,
488 * (M_PI/180),
i / 80.0,
text);
draw_face_mark(cr, x, y,
0.7 * r,
0.8 * r,
232 * (M_PI/180),
488 * (M_PI/180),
i / 80.0);
}
for (i=0; i<=80; i++) {
if (i * 100 >= redline) {
cairo_set_source_rgb(cr, 1, 0, 0);
}
draw_face_mark(cr, x, y,
0.75 * r,
0.8 * r,
232 * (M_PI/180),
488 * (M_PI/180),
i / 80.0);
}
}
@ -146,6 +188,24 @@ static void draw_speedometer(cairo_t *cr,
i / 180.0,
text);
}
for (i=0; i<=180; i+=10) {
draw_face_mark(cr, x, y,
0.7 * r,
0.8 * r,
232 * (M_PI/180),
488 * (M_PI/180),
i / 180.0);
}
for (i=0; i<=180; i+=2) {
draw_face_mark(cr, x, y,
0.75 * r,
0.8 * r,
232 * (M_PI/180),
488 * (M_PI/180),
i / 180.0);
}
}
static void draw_speedometer_needle(cairo_t *cr,
@ -310,7 +370,8 @@ static void cluster_draw_bg(cairo_t *cr,
draw_tachometer(cr,
width * 0.2,
height * 0.5,
height * 0.4);
height * 0.4,
6500);
draw_speedometer(cr,
width * 0.8,