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#include "camera-offset.hpp"
#include "shaders/tile-shader.hpp"
namespace floormat {
with_shifted_camera_offset::with_shifted_camera_offset(tile_shader& shader, std::int32_t x, std::int32_t y) :
with_shifted_camera_offset{shader, chunk_coords{std::int16_t(x), std::int16_t(y)}}
{
ASSERT(std::abs(x) < (1 << 15) && std::abs(y) < (1 << 15));
}
with_shifted_camera_offset::with_shifted_camera_offset(tile_shader& shader, const chunk_coords c) :
s{shader},
orig_offset(shader.camera_offset())
{
const auto offset = tile_shader::project({float(c.x)*TILE_MAX_DIM*TILE_SIZE[0],
float(c.y)*TILE_MAX_DIM*TILE_SIZE[1],
0});
s.set_camera_offset(orig_offset + offset);
}
with_shifted_camera_offset::~with_shifted_camera_offset()
{
s.set_camera_offset(orig_offset);
}
} // namespace floormat
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