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#include "radar/radarngon.h"
#include "math/vecmat.h"
#include <cmath>
void HudGaugeRadarNgon::clampBlip(vec3d* blip_instance) {
float hypotenuse;
hypotenuse = hypotf(blip_instance->xyz.x, blip_instance->xyz.y);
// Only do this math if the blip hypotenuse is longer than or equal to the apothem
if (hypotenuse >= r_min) {
float angle = atan2(blip_instance->xyz.y, blip_instance->xyz.x);
vec3d Line_p;
vec3d Line_v;
formLine(&Line_p, &Line_v, angle);
float s;
int success = find_intersection(&s, &vmd_zero_vector, &Line_p, blip_instance, &Line_v);
if ((success == 0) && (s < 1.0f)) {
// Clamp the blip to the edge
vm_vec_scale(blip_instance, s);
}
}
// Use Std's method of clamping and scaling, we'll get some nice rounded corners in the process
HudGaugeRadarStd::clampBlip(blip_instance);
}
void HudGaugeRadarNgon::formLine(vec3d* p, vec3d* v, float angle) {
int n; // sector the blip is in
angle -= offset;
n = fl2i(angle / arclen);
p->xyz.x = cos((arclen * n) + offset);
p->xyz.y = sin((arclen * n) + offset);
p->xyz.z = 0.0f;
(angle >= 0.0f) ? (n += 1) : (n -= 1);
v->xyz.x = cos((arclen * n) + offset);
v->xyz.y = sin((arclen * n) + offset);
v->xyz.z = 0.0f;
vm_vec_sub2(v, p);
}
// Default to a hexagon
HudGaugeRadarNgon::HudGaugeRadarNgon()
: arclen(PI2 / i2fl(6)), r_min(cos(PI / i2fl(6))) {}
HudGaugeRadarNgon::HudGaugeRadarNgon(int num_sides, float offset_incoming)
: arclen(PI2 / i2fl(num_sides)), offset(offset_incoming * (PI / 180.0f)), r_min(cos(PI / i2fl(num_sides)))
{
}
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