emitterattrs.h

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#pragma once
//------------------------------------------------------------------------------
#include "core/types.h"
#include "particles/envelopecurve.h"
#include "math/vec4.h"
 
//------------------------------------------------------------------------------
namespace Particles
{
 
static const char* FloatAttrNames[] = 
{
    "EmissionDuration",
    "ActivityDistance",
    "StartRotationMin",
    "StartRotationMax",
    "Gravity",
    "ParticleStretch",
    "VelocityRandomize",
    "RotationRandomize",
    "SizeRandomize",
    "PrecalcTime",
    "StartDelay",
    "TextureTile",
    "PhasesPerSecond",
};
    
static const char* BoolAttrNames[] = 
{
    "Looping",
    "StretchToStart",
    "RenderOldestFirst",
    "ViewAngleFade",
    "Billboard",
};
static const char* IntAttrNames[] = 
{
    "StretchDetail",
    "AnimPhases",
};
    
static const char* Float4AttrNames[] = 
{
    "WindDirection"
};
    
static const char* EnvelopeAttrNames[] = 
{
    "Red",
    "Green",
    "Blue",
    "Alpha",
    "EmissionFrequency",
    "LifeTime",
    "StartVelocity",
    "RotationVelocity",
    "Size",
    "SpreadMin",
    "SpreadMax",
    "AirResistance",
    "VelocityFactor",
    "Mass",
    "TimeManipulator",
    "Alignment0"
};
 
class EmitterAttrs
{
public:

    enum FloatAttr
    {
        EmissionDuration = 0,
        ActivityDistance,
        StartRotationMin,
        StartRotationMax,
        Gravity,
        ParticleStretch,
        VelocityRandomize,
        RotationRandomize,
        SizeRandomize,
        PrecalcTime,
        StartDelay,
        TextureTile,
        PhasesPerSecond,
 
        NumFloatAttrs,
    };
 
    
    enum BoolAttr
    {
        Looping = 0,
        StretchToStart,
        RenderOldestFirst,
        ViewAngleFade,
        Billboard,
 
        NumBoolAttrs,
    };

    enum IntAttr
    {
        StretchDetail = 0,
        AnimPhases,
 
        NumIntAttrs,
    };

    enum Float4Attr
    {
        WindDirection = 0,
 
        NumFloat4Attrs
    };
    
    enum EnvelopeAttr
    {
        Red = 0,
        Green,
        Blue,
        Alpha,
        EmissionFrequency,
        LifeTime,
        StartVelocity,
        RotationVelocity,
        Size,
        SpreadMin,
        SpreadMax,
        AirResistance,
        VelocityFactor,
        Mass,
        TimeManipulator,
 
        Alignment0,             // pad value to align num curves to 16
        
        NumEnvelopeAttrs,
    };

    EmitterAttrs();
    void SetFloat(FloatAttr key, float value);
    float GetFloat(FloatAttr key) const;
    void SetBool(BoolAttr key, bool value);
    bool GetBool(BoolAttr key) const;
    void SetInt(IntAttr key, int value);
    int GetInt(IntAttr key) const;
    void SetVec4(Float4Attr key, const Math::vec4& value);
    const Math::vec4& GetVec4(Float4Attr key) const;
    void SetEnvelope(EnvelopeAttr key, const EnvelopeCurve& value);
    const EnvelopeCurve& GetEnvelope(EnvelopeAttr key) const;
 
private:
    Math::vec4 vec4Values[NumFloat4Attrs];
    float floatValues[NumFloatAttrs];
    EnvelopeCurve envelopeValues[NumEnvelopeAttrs];
 
    struct IntAttributes
    {
        uint stretchDetail : 8;
        uint animPhases : 8;
    } intAttributes;
 
    struct BoolAttributes
    {
        bool looping : 1;
        bool stretchToStart : 1;
        bool renderOldestFirst : 1;
        bool viewAngleFade : 1;
        bool billboard : 1;
    } boolAttributes;
};
 
//------------------------------------------------------------------------------
inline void
EmitterAttrs::SetFloat(FloatAttr key, float value)
{
    this->floatValues[key] = value;
}
 
//------------------------------------------------------------------------------
inline float
EmitterAttrs::GetFloat(FloatAttr key) const
{
    return this->floatValues[key];
}
 
//------------------------------------------------------------------------------
inline void
EmitterAttrs::SetBool(BoolAttr key, bool value)
{
    switch (key)
    {
    case Looping:
        this->boolAttributes.looping = value;
        break;
    case StretchToStart:
        this->boolAttributes.stretchToStart = value;
        break;
    case RenderOldestFirst:
        this->boolAttributes.renderOldestFirst = value;
        break;
    case ViewAngleFade:
        this->boolAttributes.viewAngleFade = value;
        break;
    case Billboard:
        this->boolAttributes.billboard = value;
        break;
    default: n_error("unhandled enum"); break;
    };
}
 
//------------------------------------------------------------------------------
inline bool
EmitterAttrs::GetBool(BoolAttr key) const
{
    switch (key)
    {
    case Looping:
        return this->boolAttributes.looping;
    case StretchToStart:
        return this->boolAttributes.stretchToStart;
    case RenderOldestFirst:
        return this->boolAttributes.renderOldestFirst;
    case ViewAngleFade:
        return this->boolAttributes.viewAngleFade;
    case Billboard:
        return this->boolAttributes.billboard;
    default: n_error("unhandled enum"); break;
    };
    return false;
}
 
//------------------------------------------------------------------------------
inline void
EmitterAttrs::SetInt(IntAttr key, int value)
{
    switch (key)
    {
    case StretchDetail:
        this->intAttributes.stretchDetail = value;
        break;
    case AnimPhases:
        this->intAttributes.stretchDetail = value;
        break;
    default: n_error("unhandled enum"); break;
    };
}
 
//------------------------------------------------------------------------------
inline int
EmitterAttrs::GetInt(IntAttr key) const
{
    switch (key)
    {
    case StretchDetail:
        return this->intAttributes.stretchDetail;
    case AnimPhases:
        return this->intAttributes.stretchDetail;
    default: n_error("unhandled enum"); break;        
    };
    return 0;
}
 
//------------------------------------------------------------------------------
inline void 
EmitterAttrs::SetVec4( Float4Attr key, const Math::vec4& value )
{
    this->vec4Values[key] = value;
}
 
//------------------------------------------------------------------------------
inline const Math::vec4& 
EmitterAttrs::GetVec4( Float4Attr key ) const
{
    return this->vec4Values[key];
}
 
//------------------------------------------------------------------------------
inline void
EmitterAttrs::SetEnvelope(EnvelopeAttr key, const EnvelopeCurve& value)
{
    this->envelopeValues[key] = value;
}
 
//------------------------------------------------------------------------------
inline const EnvelopeCurve&
EmitterAttrs::GetEnvelope(EnvelopeAttr key) const
{
    return this->envelopeValues[key];
}
 
} // namespace Particles
//------------------------------------------------------------------------------