G3D::BumpMapPreprocess Class Reference

#include <BumpMapPreprocess.h>

Public Member Functions
	BumpMapPreprocess ()
	BumpMapPreprocess (const Any &any)
Any	toAny () const
bool	operator== (const BumpMapPreprocess &other) const

Public Attributes
bool	lowPassFilter
float	zExtentPixels
bool	scaleZByNz

Detailed Description

Not in the BumpMap class to avoid a circular dependency between Texture and BumpMap. G3D::Image::computeNormalMap().

Constructor & Destructor Documentation

G3D::BumpMapPreprocess::BumpMapPreprocess ( )

inline

: lowPassFilter(false), zExtentPixels(-0.02f), scaleZByNz(false) {}

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G3D::BumpMapPreprocess::BumpMapPreprocess

(

const Any &

any

)

 {
 *this = BumpMapPreprocess();
 for (Any::AnyTable::Iterator it = any.table().begin(); it.isValid(); ++it) {
 const std::string& key = toLower(it->key);
 if (key == "lowpassfilter") {
 lowPassFilter = it->value;
 } else if (key == "zextentpixels") {
 zExtentPixels = it->value;
 } else if (key == "scalezbynz") {
 scaleZByNz = it->value;
 } else {
 any.verify(false, "Illegal key: " + it->key);
 }
 }
}

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Member Function Documentation

bool G3D::BumpMapPreprocess::operator== ( const BumpMapPreprocess &  other ) const

inline

 {
 return 
 (lowPassFilter == other.lowPassFilter) &&
 (zExtentPixels == other.zExtentPixels) &&
 (scaleZByNz == other.scaleZByNz);
 }

Any G3D::BumpMapPreprocess::toAny

(

)

const

 {
 Any any(Any::TABLE, "BumpMapPreprocess");
 any["lowPassFilter"] = lowPassFilter;
 any["zExtentPixels"] = zExtentPixels;
 any["scaleZByNz"] = scaleZByNz;
 return any;
}

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Member Data Documentation

bool G3D::BumpMapPreprocess::lowPassFilter

If true, the elevations are box filtered after computing normals and before uploading, which produces better results for parallax offset mapping Defaults to false.

bool G3D::BumpMapPreprocess::scaleZByNz

After computing normals, scale the height by |N.z|, a trick that reduces texture swim in steep areas for parallax offset mapping. Defaults to false.

float G3D::BumpMapPreprocess::zExtentPixels

Height of the maximum ("white") value, in pixels, for the purpose of computing normals. A value of 255 means that a 255 x 255 bump image with a full black-to-white gradient will produce a 45-degree ramp (this also results in "cubic" voxels). A negative value means to set zExtentPixels to -zExtentPixels * max(width, height). The default is -0.02.

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The documentation for this class was generated from the following files:

• dep/g3dlite/include/G3D/BumpMapPreprocess.h
• dep/g3dlite/source/BumpMapPreprocess.cpp