63 lines
1.6 KiB
Plaintext
63 lines
1.6 KiB
Plaintext
#ifndef OSG_ALPHAFUNC
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#define OSG_ALPHAFUNC 1
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#include <osg/StateAttribute>
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#include <osg/StateSet>
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namespace osg {
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/** Encapsulte OpenGL glAlphaFunc.
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*/
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class SG_EXPORT AlphaFunc : public StateAttribute
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{
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public :
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AlphaFunc();
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virtual bool isSameKindAs(const Object* obj) const { return dynamic_cast<const AlphaFunc*>(obj)!=0L; }
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virtual Object* clone() const { return new AlphaFunc(); }
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virtual const char* className() const { return "AlphaFunc"; }
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virtual const Type getType() const { return ALPHAFUNC; }
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virtual void setStateSetModes(StateSet& ds,const GLModeValue value) const
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{
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ds.setMode(GL_ALPHA_TEST,value);
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}
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enum ComparisonFunction {
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NEVER = GL_NEVER,
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LESS = GL_LESS,
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EQUAL = GL_EQUAL,
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LEQUAL = GL_LEQUAL,
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GREATER = GL_GREATER,
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NOTEQUAL = GL_NOTEQUAL,
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GEQUAL = GL_GEQUAL,
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ALWAYS = GL_ALWAYS
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};
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inline void setFunction(const ComparisonFunction func,const float ref)
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{
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_comparisonFunc = func;
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_referenceValue = ref;
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}
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inline const ComparisonFunction getFunction() const { return _comparisonFunc; }
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inline const float getReferenceValue() const { return _referenceValue; }
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virtual void apply(State& state) const;
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protected:
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virtual ~AlphaFunc();
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ComparisonFunction _comparisonFunc;
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float _referenceValue;
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};
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};
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#endif
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