1 files changed, 104 insertions, 15 deletions

diff --git a/main/floormat-main-impl.cpp b/main/floormat-main-impl.cpp
index 56c19882..85fd5cb9 100644
--- a/main/floormat-main-impl.cpp
+++ b/main/floormat-main-impl.cpp
@@ -3,11 +3,17 @@
 #include "floormat-app.hpp"
 #include "compat/assert.hpp"
 #include "compat/fpu.hpp"
+#include "src/chunk.hpp"
+#include "src/world.hpp"
+#include "src/camera-offset.hpp"
+
+//#define FM_SKIP_MSAA
 
 namespace floormat {
 
 floormat_main::floormat_main() noexcept = default;
 floormat_main::~floormat_main() noexcept = default;
+main_impl::~main_impl() noexcept = default;
 
 static const char* const fm_fake_argv[] = { "floormat", nullptr };
 
@@ -28,7 +34,15 @@ auto main_impl::make_window_flags(const fm_options& s) -> Configuration::WindowF
     return flags;
 }
 
-void main_impl::recalc_viewport(Vector2i size)
+auto main_impl::make_conf(const fm_options& s) -> Configuration
+{
+    return Configuration{}
+           .setTitle(s.title)
+           .setSize(s.resolution)
+           .setWindowFlags(make_window_flags(s));
+}
+
+void main_impl::recalc_viewport(Vector2i size) noexcept
 {
     GL::defaultFramebuffer.setViewport({{}, size });
 #ifdef FM_MSAA
@@ -40,23 +54,15 @@ void main_impl::recalc_viewport(Vector2i size)
 #endif
     _shader.set_scale(Vector2(size));
     app.on_viewport_event(size);
-    setMinimalLoopPeriod(5);
 }
 
-auto main_impl::make_conf(const fm_options& s) -> Configuration
-{
-    return Configuration{}
-           .setTitle(s.title)
-           .setSize(s.resolution)
-           .setWindowFlags(make_window_flags(s));
-}
-
-main_impl::main_impl(floormat_app& app, const fm_options& s) :
+// NOLINTNEXTLINE(performance-unnecessary-value-param)
+main_impl::main_impl(floormat_app& app, fm_options s) noexcept :
     Platform::Sdl2Application{Arguments{fake_argc, fm_fake_argv},
                               make_conf(s), make_gl_conf(s)},
-    app{app}, s{s}
+    app{app}, s{std::move(s)}
 {
-    switch (s.vsync)
+    switch (s.vsync) // NOLINT(bugprone-use-after-move)
     {
     case fm_tristate::on:
         (void)setSwapInterval(1);
@@ -75,7 +81,60 @@ main_impl::main_impl(floormat_app& app, const fm_options& s) :
     timeline.start();
 }
 
-main_impl::~main_impl() = default;
+global_coords main_impl::pixel_to_tile(Vector2d position) const noexcept
+{
+    constexpr Vector2d pixel_size{dTILE_SIZE[0], dTILE_SIZE[1]};
+    constexpr Vector2d half{.5, .5};
+    const Vector2d px = position - Vector2d{windowSize()}*.5 - _shader.camera_offset()*.5;
+    const Vector2d vec = tile_shader::unproject(px) / 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(windowSize());
+        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
+{
+    auto [minx, maxx, miny, maxy] = get_draw_bounds();
+
+    for (std::int16_t y = miny; y <= maxy; y++)
+        for (std::int16_t x = minx; x <= maxx; x++)
+        {
+#if 0
+            if (const chunk_coords c = {x, y}; !_world.contains(c))
+                make_test_chunk(*_world[c]);
+#endif
+            const chunk_coords c{x, y};
+            const with_shifted_camera_offset o{_shader, c};
+            _floor_mesh.draw(_shader, *_world[c]);
+        }
+
+    for (std::int16_t y = miny; y <= maxy; y++)
+        for (std::int16_t x = minx; x <= maxx; x++)
+        {
+            const chunk_coords c{x, y};
+            const with_shifted_camera_offset o{_shader, c};
+            _wall_mesh.draw(_shader, *_world[c]);
+        }
+}
 
 void main_impl::drawEvent()
 {
@@ -87,15 +146,45 @@ void main_impl::drawEvent()
         _frame_time = _frame_time*(1-alpha) + alpha*dt;
     }
     else
+    {
         swapBuffers();
         timeline.nextFrame();
+    }
 
-    const auto dt = std::clamp((double)timeline.previousFrameDuration(), 1e-6, 1e-1);
+    const float dt = std::clamp(timeline.previousFrameDuration(), 1e-6f, 1e-1f);
     app.update(dt);
 
     _shader.set_tint({1, 1, 1, 1});
+
+    {
+        GL::defaultFramebuffer.clear(GL::FramebufferClear::Color);
+#if defined FM_MSAA && !defined FM_SKIP_MSAA
+        _msaa_framebuffer.clear(GL::FramebufferClear::Color);
+        _msaa_framebuffer.bind();
+#endif
+        draw_world();
+        app.draw_msaa();
+#if defined FM_MSAA && !defined FM_SKIP_MSAA
+        GL::defaultFramebuffer.bind();
+        GL::Framebuffer::blit(_msaa_framebuffer, GL::defaultFramebuffer, {{}, windowSize()}, GL::FramebufferBlit::Color);
+#endif
+    }
+
+    app.draw();
+
+    swapBuffers();
+    redraw();
+    timeline.nextFrame();
 }
 
+void main_impl::quit(int status)
+{
+    Platform::Sdl2Application::exit(status);
+}
+
+Vector2i main_impl::window_size() const noexcept { return windowSize(); }
+tile_shader& shader() noexcept { return _shader; }
+
 floormat_main* floormat_main::create(floormat_app& app, const fm_options& options)
 {
     auto* ret = new main_impl(app, options);