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/******************************************************************/
/* This file is part of the homework assignments for CSCI-427/527 */
/* at The College of William & Mary and authored by Pieter Peers. */
/* No part of this file, whether altered or in original form, can */
/* be distributed or used outside the context of CSCI-427/527 */
/* without consent of either the College of William & Mary or */
/* Pieter Peers. */
/******************************************************************/
#include "shadingFrameTransformation.h"
//////////////////
// Constructors //
//////////////////
shadingFrameTransformation::shadingFrameTransformation(const std::shared_ptr<const shader_base>& shader)
: shader_base()
{
_shader = shader;
}
/////////////
// Methods //
/////////////
color shadingFrameTransformation::shade(const intersectionPoint& ip, const vec3d& light_dir) const
{
// transform to local shading frame
intersectionPoint localIp(ip);
localIp.inverseTransformShadingFrame( _transformation(ip.textureCoordinate()) );
// Done.
return _shader->shade(localIp, light_dir);
}
color shadingFrameTransformation::reflectance(const intersectionPoint& ip, const vec3d& light_dir) const
{
// transform to local shading frame
intersectionPoint localIp(ip);
localIp.inverseTransformShadingFrame( _transformation(ip.textureCoordinate()) );
// Done.
return _shader->reflectance(localIp, light_dir);
}
brdfSample shadingFrameTransformation::sample(const intersectionPoint& ip, float r1, float r2) const
{
// transform to local shading frame
intersectionPoint localIp(ip);
transformation3d ct = _transformation(ip.textureCoordinate());
localIp.inverseTransformShadingFrame(ct);
//get sample (in local shading frame)
brdfSample sample = _shader->sample(localIp, r1, r2);
// transform to global shading frame
return sample.transform(ct);
}
float shadingFrameTransformation::reflectivity(const intersectionPoint& ip) const
{
return _shader->reflectivity(ip);
}
color shadingFrameTransformation::emittance(const intersectionPoint& ip) const
{
// transform to local shading frame
intersectionPoint localIp(ip);
localIp.inverseTransformShadingFrame( _transformation(ip.textureCoordinate()) );
// Done.
return _shader->emittance(localIp);
}
shaderProperties shadingFrameTransformation::properties(const intersectionPoint& ip) const
{
return _shader->properties(ip);
}
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