mirror of
https://github.com/KartKrewDev/RingRacers.git
synced 2025-10-30 08:01:28 +00:00
79 lines
1.5 KiB
C++
79 lines
1.5 KiB
C++
// DR. ROBOTNIK'S RING RACERS
|
|
//-----------------------------------------------------------------------------
|
|
// Copyright (C) 2025 by James Robert Roman
|
|
// Copyright (C) 2025 by Kart Krew
|
|
//
|
|
// This program is free software distributed under the
|
|
// terms of the GNU General Public License, version 2.
|
|
// See the 'LICENSE' file for more details.
|
|
//-----------------------------------------------------------------------------
|
|
|
|
#include <optional>
|
|
#include <vector>
|
|
|
|
#include "math/fixed.hpp"
|
|
#include "p_sweep.hpp"
|
|
|
|
#include "p_local.h"
|
|
|
|
namespace
|
|
{
|
|
|
|
std::vector<line_t*> g_lines;
|
|
|
|
};
|
|
|
|
void P_TestLine(line_t* ld)
|
|
{
|
|
g_lines.emplace_back(ld);
|
|
}
|
|
|
|
line_t* P_SweepTestLines(fixed_t ax, fixed_t ay, fixed_t bx, fixed_t by, fixed_t r, vector2_t* return_normal)
|
|
{
|
|
using namespace srb2::math;
|
|
using namespace srb2::sweep;
|
|
|
|
struct Collision
|
|
{
|
|
unit z;
|
|
vec2 normal;
|
|
line_t* ld;
|
|
|
|
bool operator<(const Collision& b) const { return z < b.z; }
|
|
};
|
|
|
|
std::optional<Collision> collision;
|
|
|
|
LineSegment<Fixed> l{{ax, ay}, {bx, by}};
|
|
AABBvsLine sweep{r, l};
|
|
|
|
for (line_t* ld : g_lines)
|
|
{
|
|
LineSegment<Fixed> ls{{ld->v1->x, ld->v1->y}, {ld->v2->x, ld->v2->y}};
|
|
Result rs = sweep(ls);
|
|
if (rs.hit)
|
|
{
|
|
if (!collision || rs.hit->z < collision->z)
|
|
{
|
|
collision = {rs.hit->z, rs.hit->n, ld};
|
|
}
|
|
}
|
|
}
|
|
|
|
g_lines.clear();
|
|
|
|
if (!collision)
|
|
{
|
|
return nullptr;
|
|
}
|
|
|
|
return_normal->x = Fixed {collision->normal.x};
|
|
return_normal->y = Fixed {collision->normal.y};
|
|
|
|
return collision->ld;
|
|
}
|
|
|
|
void P_ClearTestLines(void)
|
|
{
|
|
g_lines.clear();
|
|
}
|