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#include "scenery.hpp"
#include "anim-atlas.hpp"
#include "compat/assert.hpp"
#include <algorithm>
#include <Corrade/Containers/PairStl.h>
#include <Corrade/Containers/TripleStl.h>
namespace floormat {
namespace {
struct rotation_symmetry final {
rotation r = rotation::N;
Triple<Vector2b, Vector2ub, Vector2ub> value;
};
constexpr Pair<rotation, Triple<Vector2b, Vector2ub, Vector2ub>> rotation_symmetries[] = {
{ rotation::N, { { 1, 1}, {0, 1}, {0, 1} } },
{ rotation::E, { {-1, 1}, {1, 0}, {1, 0} } },
{ rotation::S, { {-1, -1}, {0, 1}, {0, 1} } },
{ rotation::W, { { 1, -1}, {1, 0}, {1, 0} } },
};
constexpr Triple<Vector2b, Vector2ub, Vector2ub> symmetry_for_rot(rotation r)
{
fm_assert(r < rotation_COUNT && (std::size_t)r % 2 == 0);
auto idx = (std::size_t)r / 2;
const auto& [r1, sym] = rotation_symmetries[idx];
fm_debug_assert(r1 == r);
return sym;
}
constexpr Pair<Vector2b, Vector2ub> rotate_bbox_to(Vector2b offset0, Vector2ub size0, rotation r_old, rotation r_new)
{
fm_assert(r_old < rotation_COUNT && (std::size_t)r_old % 2 == 0);
fm_assert(r_new < rotation_COUNT && (std::size_t)r_new % 2 == 0);
auto [m_offset0, i_offset0, i_size0] = symmetry_for_rot(r_old);
auto offset0_ = offset0 * m_offset0;
auto offset_n = Vector2b(offset0_[i_offset0[0]], offset0_[i_offset0[1]]);
fm_debug_assert(r_old != rotation::N || offset_n == offset0);
auto size_n = Vector2ub(size0[i_size0[0]], size0[i_size0[1]]);
fm_debug_assert(r_old != rotation::N || size_n == size0);
auto [m_offset1, i_offset1, i_size1] = symmetry_for_rot(r_new);
return {
Vector2b{offset_n[i_offset1[0]], offset_n[i_offset1[1]]}*m_offset1,
Vector2ub{size_n[i_size1[0]], size_n[i_size1[1]]},
};
}
constexpr Pair<Vector2b, Vector2ub> rot_for_door(rotation r)
{
constexpr Pair<Vector2b, Vector2ub> door_north = {
{ 0, -32 }, { 32, 16 },
};
auto [offset, size] = door_north;
return rotate_bbox_to(offset, size, rotation::N, r);
};
/* N 0 -32 32 16
* E 32 0 16 32
* S 0 32 32 16
* W -32 0 16 32
*/
static_assert(rot_for_door(rotation::N) == Pair<Vector2b, Vector2ub>{{ 0, -32}, {32, 16}});
static_assert(rot_for_door(rotation::E) == Pair<Vector2b, Vector2ub>{{32, 0 }, {16, 32}});
static_assert(rot_for_door(rotation::S) == Pair<Vector2b, Vector2ub>{{ 0, 32}, {32, 16}});
static_assert(rot_for_door(rotation::W) == Pair<Vector2b, Vector2ub>{{-32, 0 }, {16, 32}});
/* N 16 -32 32 16
* E 32 16 16 32
* S -16 32 32 16
* W -32 -16 16 32
*/
static_assert(rotate_bbox_to({ 16, -32}, {32, 16}, rotation::N, rotation::E) == Pair<Vector2b, Vector2ub>{{ 32, 16}, {16, 32}});
static_assert(rotate_bbox_to({ 16, -32}, {32, 16}, rotation::N, rotation::S) == Pair<Vector2b, Vector2ub>{{-16, 32}, {32, 16}});
static_assert(rotate_bbox_to({ 16, -32}, {32, 16}, rotation::N, rotation::W) == Pair<Vector2b, Vector2ub>{{-32, -16}, {16, 32}});
static_assert(rotate_bbox_to({ 32, 16}, {16, 32}, rotation::E, rotation::S) == Pair<Vector2b, Vector2ub>{{-16, 32}, {32, 16}});
static_assert(rotate_bbox_to({ 32, 16}, {16, 32}, rotation::E, rotation::N) == Pair<Vector2b, Vector2ub>{{ 16, -32}, {32, 16}});
static_assert(rotate_bbox_to({-32, -16}, {16, 32}, rotation::W, rotation::S) == Pair<Vector2b, Vector2ub>{{-16, 32}, {32, 16}});
} // namespace
scenery_proto::scenery_proto() noexcept = default;
scenery_proto::scenery_proto(const std::shared_ptr<anim_atlas>& atlas, const scenery& frame) noexcept :
atlas{atlas}, frame{frame}
{}
scenery_proto& scenery_proto::operator=(const scenery_proto&) noexcept = default;
scenery_proto::scenery_proto(const scenery_proto&) noexcept = default;
scenery_proto::operator bool() const noexcept { return atlas != nullptr; }
scenery_ref::scenery_ref(std::shared_ptr<anim_atlas>& atlas, scenery& frame) noexcept : atlas{atlas}, frame{frame} {}
scenery_ref::scenery_ref(const scenery_ref&) noexcept = default;
scenery_ref::scenery_ref(scenery_ref&&) noexcept = default;
scenery_ref& scenery_ref::operator=(const scenery_proto& proto) noexcept
{
atlas = proto.atlas;
frame = proto.frame;
return *this;
}
scenery_ref::operator scenery_proto() const noexcept { return { atlas, frame }; }
scenery_ref::operator bool() const noexcept { return atlas != nullptr; }
scenery::scenery(generic_tag_t, const anim_atlas& atlas, rotation r, frame_t frame,
pass_mode passability, bool active, bool interactive,
Vector2b offset, Vector2b bbox_offset, Vector2ub bbox_size) :
frame{frame},
offset{offset}, bbox_offset{bbox_offset}, bbox_size{bbox_size},
r{r}, type{scenery_type::generic},
passability{passability},
active{active}, interactive{interactive}
{
fm_assert(r < rotation_COUNT);
fm_assert(frame < atlas.group(r).frames.size());
}
scenery::scenery(door_tag_t, const anim_atlas& atlas, rotation r, bool is_open,
Vector2b offset, Vector2b bbox_offset, Vector2ub bbox_size) :
frame{frame_t(is_open ? 0 : atlas.group(r).frames.size()-1)},
offset{offset}, bbox_offset{bbox_offset}, bbox_size{bbox_size},
r{r}, type{scenery_type::door},
passability{is_open ? pass_mode::pass : pass_mode::blocked},
interactive{true}
{
fm_assert(r < rotation_COUNT);
fm_assert(atlas.group(r).frames.size() >= 2);
}
bool scenery::can_activate(const anim_atlas&) const noexcept
{
return interactive;
}
void scenery::update(float dt, const anim_atlas& anim)
{
if (!active)
return;
switch (type)
{
default:
case scenery_type::none:
case scenery_type::generic:
break;
case scenery_type::door:
const auto hz = std::uint8_t(anim.info().fps);
const auto nframes = (int)anim.info().nframes;
fm_debug_assert(anim.info().fps > 0 && anim.info().fps <= 0xff);
auto delta_ = int(delta) + int(65535u * dt);
delta_ = std::min(65535, delta_);
const auto frame_time = int(1.f/hz * 65535);
const auto n = (std::uint8_t)std::clamp(delta_ / frame_time, 0, 255);
delta = (std::uint16_t)std::clamp(delta_ - frame_time*n, 0, 65535);
fm_debug_assert(delta >= 0);
const std::int8_t dir = closing ? 1 : -1;
const int fr = frame + dir*n;
active = fr > 0 && fr < nframes-1;
if (fr <= 0)
passability = pass_mode::pass;
else if (fr >= nframes-1)
passability = pass_mode::blocked;
else
passability = pass_mode::see_through;
frame = (frame_t)std::clamp(fr, 0, nframes-1);
if (!active)
delta = closing = 0;
break;
}
}
bool scenery::activate(const anim_atlas& atlas)
{
if (active)
return false;
switch (type)
{
default:
case scenery_type::none:
case scenery_type::generic:
break;
case scenery_type::door:
fm_assert(frame == 0 || frame == atlas.info().nframes-1);
closing = frame == 0;
frame += closing ? 1 : -1;
active = true;
return true;
}
return false;
}
#ifdef __GNUG__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wfloat-equal"
#endif
bool scenery::operator==(const scenery&) const noexcept = default;
#ifdef __GNUG__
#pragma GCC diagnostic pop
#endif
} // namespace floormat
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