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#include "main-impl.hpp"
#include "floormat/app.hpp"
#include "src/camera-offset.hpp"
#include "src/anim-atlas.hpp"
#include "main/clickable.hpp"
#include <Corrade/Containers/ArrayView.h>
#include <Magnum/GL/DefaultFramebuffer.h>
#include <Magnum/GL/Renderer.h>
#include <Magnum/Math/Color.h>
#include <algorithm>
#include <thread>
namespace floormat {
void main_impl::recalc_viewport(Vector2i fb_size, Vector2i win_size) noexcept
{
_dpi_scale = dpiScaling();
_virtual_scale = Vector2(fb_size) / Vector2(win_size);
update_window_state();
_shader.set_scale(Vector2{fb_size});
GL::defaultFramebuffer.setViewport({{}, fb_size });
// -- state ---
using R = GL::Renderer;
GL::Renderer::setBlendEquation(R::BlendEquation::Add, R::BlendEquation::Add);
GL::Renderer::setBlendFunction(R::BlendFunction::SourceAlpha, R::BlendFunction::OneMinusSourceAlpha);
GL::Renderer::disable(R::Feature::FaceCulling);
GL::Renderer::disable(R::Feature::DepthTest);
GL::Renderer::enable(R::Feature::Blending);
GL::Renderer::enable(R::Feature::ScissorTest);
GL::Renderer::enable(R::Feature::DepthClamp);
GL::Renderer::setDepthFunction(R::DepthFunction::Greater);
GL::Renderer::setScissor({{}, fb_size});
// -- user--
app.on_viewport_event(fb_size);
}
global_coords main_impl::pixel_to_tile(Vector2d position) const noexcept
{
constexpr Vector2d pixel_size(TILE_SIZE2);
constexpr Vector2d half{.5, .5};
const Vector2d px = position - Vector2d{framebufferSize()}*.5 - _shader.camera_offset();
const Vector2d vec = tile_shader::unproject(px*.5) / pixel_size + half;
const auto x = (std::int32_t)std::floor(vec[0]), y = (std::int32_t)std::floor(vec[1]);
return { x, y };
}
auto main_impl::get_draw_bounds() const noexcept -> draw_bounds
{
using limits = std::numeric_limits<std::int16_t>;
auto x0 = limits::max(), x1 = limits::min(), y0 = limits::max(), y1 = limits::min();
for (const auto win = Vector2d(framebufferSize());
auto p : {pixel_to_tile(Vector2d{0, 0}).chunk(),
pixel_to_tile(Vector2d{win[0]-1, 0}).chunk(),
pixel_to_tile(Vector2d{0, win[1]-1}).chunk(),
pixel_to_tile(Vector2d{win[0]-1, win[1]-1}).chunk()})
{
x0 = std::min(x0, p.x);
x1 = std::max(x1, p.x);
y0 = std::min(y0, p.y);
y1 = std::max(y1, p.y);
}
return {x0, x1, y0, y1};
}
void main_impl::draw_world() noexcept
{
const auto [minx, maxx, miny, maxy] = get_draw_bounds();
const auto sz = framebufferSize();
for (std::int16_t y = miny; y <= maxy; y++)
for (std::int16_t x = minx; x <= maxx; x++)
{
const chunk_coords pos{x, y};
if (!_world.contains(pos))
app.maybe_initialize_chunk(pos, _world[pos]);
auto& c = _world[pos];
if (c.empty())
continue;
const with_shifted_camera_offset o{_shader, pos, {minx, miny}, {maxx, maxy}};
if (check_chunk_visible(_shader.camera_offset(), sz))
_floor_mesh.draw(_shader, c);
}
GL::Renderer::enable(GL::Renderer::Feature::DepthTest);
GL::defaultFramebuffer.clearDepthStencil(0, 0);
for (std::int16_t y = miny; y <= maxy; y++)
for (std::int16_t x = minx; x <= maxx; x++)
{
const chunk_coords pos{x, y};
auto& c = _world[pos];
if (c.empty())
continue;
const with_shifted_camera_offset o{_shader, pos, {minx, miny}, {maxx, maxy}};
if (check_chunk_visible(_shader.camera_offset(), sz))
_wall_mesh.draw(_shader, c);
}
}
void main_impl::draw_anim() noexcept
{
const auto sz = framebufferSize();
const auto [minx, maxx, miny, maxy] = get_draw_bounds();
_clickable_scenery.clear();
for (std::int16_t y = miny; y <= maxy; y++)
for (std::int16_t x = minx; x <= maxx; x++)
{
const chunk_coords pos{x, y};
auto& c = _world[pos];
if (c.empty())
continue;
const with_shifted_camera_offset o{_shader, pos, {minx, miny}, {maxx, maxy}};
if (check_chunk_visible(_shader.camera_offset(), sz))
for (std::size_t i = 0; i < TILE_COUNT; i++)
{
const local_coords xy{i};
if (auto [atlas, s] = c[xy].scenery(); atlas)
{
_anim_mesh.draw(_shader, *atlas, s.r, s.frame, xy);
const auto& g = atlas->group(s.r);
const auto& f = atlas->frame(s.r, s.frame);
const auto world_pos = TILE_SIZE20 * Vector3(xy.x, xy.y, 0) + Vector3(g.offset);
const Vector2ui offset((Vector2(_shader.camera_offset()) + Vector2(sz)*.5f)
+ _shader.project(world_pos) - Vector2(f.ground));
clickable<anim_atlas, scenery> item = {
*atlas, s,
{ f.offset, f.offset + f.size }, { offset, offset + f.size },
atlas->bitmask(), tile_shader::depth_value(xy, 0.25f), pos, xy,
!g.mirror_from.isEmpty(),
};
_clickable_scenery.push_back(item);
}
}
}
}
bool main_impl::check_chunk_visible(const Vector2d& offset, const Vector2i& size) noexcept
{
constexpr Vector3d len = dTILE_SIZE * TILE_MAX_DIM20d;
enum : std::size_t { x, y, };
constexpr Vector2d p00 = tile_shader::project(Vector3d(0, 0, 0)),
p10 = tile_shader::project(Vector3d(len[x], 0, 0)),
p01 = tile_shader::project(Vector3d(0, len[y], 0)),
p11 = tile_shader::project(Vector3d(len[x], len[y], 0));
constexpr auto xx = std::minmax({ p00[x], p10[x], p01[x], p11[x], }), yy = std::minmax({ p00[y], p10[y], p01[y], p11[y], });
constexpr auto minx = xx.first, maxx = xx.second, miny = yy.first, maxy = yy.second;
constexpr int W = (int)(maxx - minx + .5 + 1e-16), H = (int)(maxy - miny + .5 + 1e-16);
const auto X = (int)(minx + (offset[x] + size[x])*.5), Y = (int)(miny + (offset[y] + size[y])*.5);
return X + W > 0 && X < size[x] && Y + H > 0 && Y < size[y];
}
void main_impl::do_update()
{
float dt = timeline.previousFrameDuration();
if (dt > 0)
{
const float RC1 = dt_expected.do_sleep ? 1.f : 1.f/5, RC2 = 1.f/10;
const float alpha1 = dt/(dt + RC1);
const float alpha2 = dt/(dt + RC2);
_frame_time1 = _frame_time1*(1-alpha1) + alpha1*dt;
_frame_time2 = _frame_time1*(1-alpha2) + alpha2*dt;
constexpr float max_deviation = 5 * 1e-3f;
if (std::fabs(_frame_time1 - _frame_time2) > max_deviation)
_frame_time1 = _frame_time2;
}
else
{
swapBuffers();
timeline.nextFrame();
}
dt = std::clamp(dt, 1e-5f, std::fmaxf(.2f, dt_expected.value));
app.update(dt);
}
void main_impl::drawEvent()
{
#ifndef __linux__
if (int index = SDL_GetWindowDisplayIndex(window()); index >= 0)
if (float hdpi = 96, vdpi = 96; !SDL_GetDisplayDPI(index, nullptr, &hdpi, &vdpi))
_dpi_scale = { hdpi / 96, vdpi / 96 };
#endif
_shader.set_tint({1, 1, 1, 1});
{
_shader.set_tint({1, 1, 1, 1});
const auto clear_color = 0x222222ff_rgbaf;
GL::defaultFramebuffer.clearColor(clear_color);
draw_world();
draw_anim();
GL::Renderer::disable(GL::Renderer::Feature::DepthTest);
}
app.draw();
GL::Renderer::flush();
do_update();
swapBuffers();
redraw();
if (dt_expected.do_sleep)
{
constexpr float ε = 1e-3f;
const float Δt൦ = timeline.currentFrameDuration(), sleep_secs = dt_expected.value - Δt൦ - dt_expected.jitter;
if (sleep_secs > ε)
std::this_thread::sleep_for(std::chrono::nanoseconds((long long)(sleep_secs * 1e9f)));
//fm_debug("jitter:%.1f sleep:%.0f", dt_expected.jitter*1000, sleep_secs*1000);
const float Δt = timeline.currentFrameDuration() - dt_expected.value;
constexpr float α = .1f;
dt_expected.jitter = std::fmax(dt_expected.jitter + Δt * α,
dt_expected.jitter * (1-α) + Δt * α);
dt_expected.jitter = std::copysign(std::fmin(dt_expected.value, std::fabs(dt_expected.jitter)), dt_expected.jitter);
}
else
dt_expected.jitter = 0;
timeline.nextFrame();
}
ArrayView<const clickable<anim_atlas, scenery>> main_impl::clickable_scenery() const noexcept
{
return { _clickable_scenery.data(), _clickable_scenery.size() };
}
ArrayView<clickable<anim_atlas, scenery>> main_impl::clickable_scenery() noexcept
{
return { _clickable_scenery.data(), _clickable_scenery.size() };
}
} // namespace floormat
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