FGFS-4.1/OpenSceneGraph
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Added support for automatic creation of global StateAttributes to osg::State,

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these global attributes are created by cloning any attributes which are
applied during rendering, the clone in a shallow copy, which will set up
default valus for that attribute.  This should prevent attribute bleed
from one stateset to the next when the global StateSet doesn't contain
an attribute used within the scene graph.
This commit is contained in:
Robert Osfield
2001-10-15 14:07:54 +00:00
parent f27c006e28
commit 59077fed15
4 changed files with 67 additions and 27 deletions
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31
include/osg/State
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@@ -104,14 +104,6 @@ class SG_EXPORT State : public Referenced
/** Get the camera */
inline const Camera* getCamera() const { return _camera.get(); }
/** Set the hint to OpenGL routines to do fine grained OpenGL error checking.*/
void setFineGrainedErrorDetection(const bool flag) { _fineGrainedErrorDetection = flag; }
/** Get the hint to OpenGL routines to do fine grained OpenGL error checking.*/
const bool getFineGrainedErrorDetection() const { return _fineGrainedErrorDetection; }
private:
unsigned int _contextID;
@@ -126,10 +118,12 @@ class SG_EXPORT State : public Referenced
{
changed = false;
last_applied_value = false;
global_default_value = false;
}
bool changed;
bool last_applied_value;
bool global_default_value;
ValueVec valueVec;
};
@@ -143,11 +137,13 @@ class SG_EXPORT State : public Referenced
{
changed = false;
last_applied_attribute = 0L;
global_default_attribute = 0L;
}
/** apply an attribute if required, passing in attribute and appropriate attribute stack */
bool changed;
const StateAttribute* last_applied_attribute;
StateAttribute* global_default_attribute;
AttributeVec attributeVec;
};
@@ -172,6 +168,8 @@ class SG_EXPORT State : public Referenced
{
if (as.last_applied_attribute != attribute)
{
if (!as.global_default_attribute) as.global_default_attribute = dynamic_cast<StateAttribute*>(attribute->clone());
as.last_applied_attribute = attribute;
attribute->apply(*this);
return true;
@@ -180,6 +178,18 @@ class SG_EXPORT State : public Referenced
return false;
}
inline const bool apply_global_default_attribute(AttributeStack& as)
{
if (as.last_applied_attribute != as.global_default_attribute)
{
as.last_applied_attribute = as.global_default_attribute;
if (as.global_default_attribute) as.global_default_attribute->apply(*this);
return true;
}
else
return false;
}
typedef std::map<StateAttribute::GLMode,ModeStack> ModeMap;
typedef std::map<StateAttribute::Type,AttributeStack> AttributeMap;
typedef std::vector<ref_ptr<const StateSet> > StateSetStack;
@@ -189,9 +199,6 @@ class SG_EXPORT State : public Referenced
AttributeMap _attributeMap;
StateSetStack _drawStateStack;
bool _fineGrainedErrorDetection;
};
};