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Use server's zoom fov for distant world loading.

This commit is contained in:
Lars Hofhansl 2018-05-15 18:49:11 -07:00
parent 935f11a602
commit a1868e8f6c
2 changed files with 6 additions and 17 deletions
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21
src/clientiface.cpp
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@ -196,30 +196,19 @@ void RemoteClient::GetNextBlocks (
s16 wanted_range = sao->getWantedRange() + 1;
float camera_fov = sao->getFov();
// If below the heuristic zoom threshold (see adjustDist() in numeric.cpp)
// distrust client-sent FOV and get server-set player object property
// Distrust client-sent FOV and get server-set player object property
// zoom FOV (degrees) as a check to avoid hacked clients using FOV to load
// distant world.
// 0.888 radians is slightly larger than the zoom threshold of 1.775 / 2
// radians.
if (camera_fov < 0.888f) {
float prop_zoom_fov = sao->getZoomFOV();
// If zoom is disabled by value 0
if (prop_zoom_fov < 0.001f)
camera_fov = 0.888f;
else
// Degrees -> radians
camera_fov = prop_zoom_fov * core::DEGTORAD;
}
float prop_zoom_fov = sao->getZoomFOV() * core::DEGTORAD;
const s16 full_d_max = std::min(adjustDist(m_max_send_distance, camera_fov),
const s16 full_d_max = std::min(adjustDist(m_max_send_distance, prop_zoom_fov),
wanted_range);
const s16 d_opt = std::min(adjustDist(m_block_optimize_distance, camera_fov),
const s16 d_opt = std::min(adjustDist(m_block_optimize_distance, prop_zoom_fov),
wanted_range);
const s16 d_blocks_in_sight = full_d_max * BS * MAP_BLOCKSIZE;
s16 d_max = full_d_max;
s16 d_max_gen = std::min(adjustDist(m_max_gen_distance, camera_fov),
s16 d_max_gen = std::min(adjustDist(m_max_gen_distance, prop_zoom_fov),
wanted_range);
// Don't loop very much at a time, adjust with distance,

2
src/util/numeric.cpp
View File

@ -168,7 +168,7 @@ s16 adjustDist(s16 dist, float zoom_fov)
// 1.775 ~= 72 * PI / 180 * 1.4, the default FOV on the client.
// The heuristic threshold for zooming is half of that.
static constexpr const float threshold_fov = 1.775f / 2.0f;
if (zoom_fov > threshold_fov)
if (zoom_fov < 0.001f || zoom_fov > threshold_fov)
return dist;
return std::round(dist * std::cbrt((1.0f - std::cos(threshold_fov)) /