ilikecats/stk-code_catmod
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Improved optimsiation for particle systems to allow

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better culling.


git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/trunk/supertuxkart@2534 178a84e3-b1eb-0310-8ba1-8eac791a3b58
This commit is contained in:
hikerstk 2008-12-01 04:50:52 +00:00
parent fbdde1aa76
commit d2866bb42e
1 changed files with 5 additions and 5 deletions
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10
src/particle_system.cpp
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@ -223,12 +223,12 @@ void ParticleSystem::update ( float t )
// center to get the correct maximum distance, which is the radius).
Vec3 center = 0.5*(xyz_min+xyz_max);
bsphere.setCenter(center.toFloat());
float radius = xyz_max.getX() - xyz_min.getX();
radius = std::max(radius, xyz_max.getY() - xyz_min.getY());
radius = std::max(radius, xyz_max.getZ() - xyz_min.getZ());
if(radius<0) radius = 0; // happens if no particles exist.
float diameter = xyz_max.getX() - xyz_min.getX();
diameter = std::max(diameter, xyz_max.getY() - xyz_min.getY());
diameter = std::max(diameter, xyz_max.getZ() - xyz_min.getZ());
if(diameter<0) diameter= 0; // happens if no particles exist.
// add the size of the actual quad to the radius on both ends
bsphere.setRadius((radius+2*m_size)*1.733f); // 1.733 approx. sqrt(3)
bsphere.setRadius((diameter*0.5f+2*m_size)*1.733f); // 1.733 approx. sqrt(3)
bsphere_is_invalid = 0;
} // update