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Fix the case when the physics system starves the logic & renderer of CPU time. If this happens, we reduce physics precision to maintain some framerate.

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This commit is contained in:
Kester Maddock 2004-12-06 11:15:50 +00:00
parent e54f51c462
commit 5590c179f5
1 changed files with 12 additions and 4 deletions
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16
source/gameengine/Physics/Sumo/Fuzzics/src/SM_Scene.cpp
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@ -191,6 +191,7 @@ bool SM_Scene::proceed(MT_Scalar curtime, MT_Scalar ticrate)
// equal to subS (might be a little smaller).
MT_Scalar subStep;
int num_samples;
int frames = m_frames;
// Compute the number of steps to do this update.
if (ticrate > 0.0)
@ -201,9 +202,16 @@ bool SM_Scene::proceed(MT_Scalar curtime, MT_Scalar ticrate)
if (num_samples > 4)
{
std::cout << "Dropping physics frames! frames:" << num_samples << std::endl;
num_samples /= 4;
subStep *= 4.0;
std::cout << "Dropping physics frames! frames:" << num_samples << " substep: " << subStep << std::endl;
MT_Scalar tr = ticrate;
do
{
frames = frames / 2;
tr = tr / 2.0;
num_samples = (unsigned int)(curtime*tr + 1.0) - frames;
subStep *= 2.0;
} while (num_samples > 8);
std::cout << " frames:" << num_samples << " substep: " << subStep << std::endl;
}
}
else
@ -226,7 +234,7 @@ bool SM_Scene::proceed(MT_Scalar curtime, MT_Scalar ticrate)
{
MT_Scalar time;
if (ticrate > 0.)
time = MT_Scalar(m_frames + step + 1) * subStep;
time = MT_Scalar(frames + step + 1) * subStep;
else
time = MT_Scalar(m_frames)/65536.0 + MT_Scalar(step + 1)*subStep;