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#include "app.hpp"
#include <Magnum/GL/DefaultFramebuffer.h>
namespace floormat {
void app::do_camera(double dt)
{
if (keys[key::camera_reset])
reset_camera_offset();
else
{
Vector2d dir{};
if (keys[key::camera_up])
dir += Vector2d{0, 1};
else if (keys[key::camera_down])
dir += Vector2d{0, -1};
if (keys[key::camera_left])
dir += Vector2d{1, 0};
else if (keys[key::camera_right])
dir += Vector2d{-1, 0};
if (dir != Vector2d{})
{
constexpr double screens_per_second = 1;
const auto pixels_per_second = windowSize().length() / screens_per_second;
auto camera_offset = _shader.camera_offset();
const auto max_camera_offset = Vector2d(windowSize() * 10);
camera_offset += dir.normalized() * dt * pixels_per_second;
camera_offset[0] = std::clamp(camera_offset[0], -max_camera_offset[0], max_camera_offset[0]);
camera_offset[1] = std::clamp(camera_offset[1], -max_camera_offset[1], max_camera_offset[1]);
_shader.set_camera_offset(camera_offset);
}
else
return;
}
recalc_cursor_tile();
if (_cursor_tile)
do_mouse_move(*_cursor_tile);
}
void app::reset_camera_offset()
{
#if 1
_shader.set_camera_offset(tile_shader::project({TILE_MAX_DIM*-.5*dTILE_SIZE[0], TILE_MAX_DIM*-.5*dTILE_SIZE[1], 0}));
#else
_shader.set_camera_offset({});
#endif
}
void app::recalc_cursor_tile()
{
if (_cursor_pixel && !_cursor_in_imgui)
_cursor_tile = pixel_to_tile(Vector2d(*_cursor_pixel));
else
_cursor_tile = std::nullopt;
}
global_coords app::pixel_to_tile(Vector2d position) const
{
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 };
}
std::array<std::int16_t, 4> app::get_draw_bounds() const noexcept
{
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};
}
} // namespace floormat
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