107 lines
4.6 KiB
C
107 lines
4.6 KiB
C
/*###############################################################################
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#
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# Copyright 2016-2021 NVIDIA Corporation
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy of
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# this software and associated documentation files (the "Software"), to deal in
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# the Software without restriction, including without limitation the rights to
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# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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# the Software, and to permit persons to whom the Software is furnished to do so,
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# subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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###############################################################################*/
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#ifndef __GLSPECTRUM_H
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#define __GLSPECTRUM_H
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////////////////////////////////////////////////////////////////////////////////
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/// The representation used for spectral parameters in surface illumination transport.
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////////////////////////////////////////////////////////////////////////////////
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struct GLSpectrum3f {
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float r, g, b; ///< Red, green and blue components of the color spectrum.
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/// Default constructor.
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GLSpectrum3f() {}
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/// Initialization constructor.
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/// @param[in] R the red component.
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/// @param[in] G the green component.
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/// @param[in] B the blue component.
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GLSpectrum3f(float R, float G, float B) { set(R, G, B); }
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/// Access to the array of spectral components.
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/// @return a pointer to the array of spectral components.
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const float* data() const { return &r; }
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/// Access to the array of spectral components.
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/// @return a pointer to the array of spectral components.
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float* data() { return &r; }
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/// Set the spectral components.
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/// @param[in] R the red component.
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/// @param[in] G the green component.
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/// @param[in] B the blue component.
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void set(float R, float G, float B) { r = R; g = G; b = B; };
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/// Componentwise scaling of the spectrum.
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/// @param[in] the scaling spectrum (RHS).
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/// @return The LHS, scaled by the RHS.
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GLSpectrum3f& operator*=(const GLSpectrum3f& k) { r *= k.r; g *= k.g; b *= k.b; return *this; }
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/// Componentwise augmentation of the spectrum.
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/// @param[in] the delta spectrum (RHS).
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/// @return The LHS, augmented by the RHS.
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GLSpectrum3f& operator+=(const GLSpectrum3f& k) { r += k.r; g += k.g; b += k.b; return *this; }
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/// Scalar scaling of the spectrum.
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/// @param[in] the scalar (RHS).
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/// @return The LHS, scaled by the RHS.
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GLSpectrum3f& operator*=(float s) { r *= s; g *= s; b *= s; return *this; }
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/// Scalar scaling of the spectrum.
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/// @param[in] the scalar (RHS).
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/// @return The LHS, scaled by the RHS.
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GLSpectrum3f& operator/=(float s) { r /= s; g /= s; b /= s; return *this; }
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/// Componentwise scaling of the spectrum.
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/// @param[in] k the scaling spectrum (RHS).
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/// @return The componentwise product of the LHS and RHS.
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GLSpectrum3f operator*(const GLSpectrum3f& k) const { return GLSpectrum3f(r * k.r, g * k.g, b * k.b); }
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/// Componentwise augmentation of the spectrum.
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/// @param[in] k the scale vector (RHS).
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/// @return The componentwise sum of the LHS and RHS.
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GLSpectrum3f operator+(const GLSpectrum3f& k) const { return GLSpectrum3f(r + k.r, g + k.g, b + k.b); }
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/// Scalar scaling of the spectrum.
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/// @param[in] s the scalar (RHS).
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/// @return The product of the LHS and the RHS scalar.
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GLSpectrum3f operator*(float s) const { return GLSpectrum3f(r * s, g * s, b * s); }
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/// Scalar scaling of the spectrum.
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/// @param[in] s the scalar (RHS).
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/// @return The product of the LHS and the RHS scalar.
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GLSpectrum3f operator/(float s) const { return GLSpectrum3f(r / s, g / s, b / s); }
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};
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/// Scalar scaling of the spectrum.
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/// @param[in] s the scalar (LHS).
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/// @param[in] k the spectrum to be scaled (RHS).
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/// @return The product of the RHS and the scalar LHS.
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inline GLSpectrum3f operator*(float s, const GLSpectrum3f& k) { return GLSpectrum3f(s * k.r, s * k.g, s * k.b); }
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#endif // __GLSPECTRUM_H
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