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#include "camera-offset.hpp"
#include "tile-defs.hpp"
#include "shaders/tile-shader.hpp"
#include "compat/assert.hpp"
#include <Magnum/Math/Vector2.h>
namespace floormat {
static_assert(sizeof(short) == 2);
with_shifted_camera_offset::with_shifted_camera_offset(tile_shader& shader, short x, short y) :
_shader{shader},
_offset{shader.camera_offset()}
{
const auto offset = _offset + tile_shader::project({float(x)*TILE_MAX_DIM*TILE_SIZE[0],
float(y)*TILE_MAX_DIM*TILE_SIZE[1],
0});
_shader.set_camera_offset(offset);
ASSERT(std::abs(offset[0]) < 1 << 24 && std::abs(offset[1]) < 1 << 24);
}
with_shifted_camera_offset::~with_shifted_camera_offset()
{
_shader.set_camera_offset(_offset);
}
} // namespace floormat
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