#5 31.4 Basic Noise Textures

Add FBmTexture.

CMakeLists.txt

@@ -212,6 +212,8 @@ set (SOURCE_TEXTURES
   src/Textures/CylinderChecker.h
   src/Textures/DiskChecker.h
   src/Textures/DiskChecker.cpp
+  src/Textures/FBmTexture.cpp
+  src/Textures/FBmTexture.h
   src/Textures/ImageTexture.cpp
   src/Textures/ImageTexture.h
   src/Textures/PlaneChecker.cpp

src/Textures/FBmTexture.cpp

@@ -0,0 +1 @@
+//  Copyright (C) Kevin Suffern 2000-2007.//  This C++ code is for non-commercial purposes only.//  This C++ code is licensed under the GNU General Public License Version 2.//  See the file COPYING.txt for the full license.//  Copyright notice for changes since the originally published version://  Copyright (C) Eduárd Mándy 2019-2021//  Though this C++ code was change in a large measure it still has the original copyright notice.//  This C++ code is for non-commercial purposes only.//  This C++ code is licensed under the GNU General Public License Version 2.//  See the file COPYING.txt for the full license.#include "FBmTexture.h"#include "../Noises/LatticeNoise.h"FBmTexture::FBmTexture(LatticeNoise *ln_ptr) {    noise_ptr = ln_ptr;}RGBColor FBmTexture::get_color(const ShadeRec& sr) const {    float value = noise_ptr->value_fbm(sr.local_hit_point); // in the range (0, 1)    value = min_value + (max_value - min_value) * value;    // in the range (min_value, max_value)    if (value < 0.0 || value > 1.0) {        return RGBColor(1, 0, 0);    }    else {        return (value * color);    }}

src/Textures/FBmTexture.h

@@ -0,0 +1 @@
+//  Copyright (C) Kevin Suffern 2000-2007.//  This C++ code is for non-commercial purposes only.//  This C++ code is licensed under the GNU General Public License Version 2.//  See the file COPYING.txt for the full license.//  Copyright notice for changes since the originally published version://  Copyright (C) Eduárd Mándy 2019-2021//  Though this C++ code was change in a large measure it still has the original copyright notice.//  This C++ code is for non-commercial purposes only.//  This C++ code is licensed under the GNU General Public License Version 2.//  See the file COPYING.txt for the full license.#include "Texture.h"#include "../Utilities/RGBColor.h"class ShadeRec;class LatticeNoise;class FBmTexture: public Texture {public:    FBmTexture() = default;    FBmTexture(LatticeNoise *ln_ptr);    void set_color(const float r, const float g, const float b);    void set_min_value(const float min);    void set_max_value(const float max);    virtual RGBColor get_color(const ShadeRec& sr) const;private:    LatticeNoise* noise_ptr = nullptr;    RGBColor color = RGBColor::black;    float min_value = 0.0f;    float max_value = 1.0f;};inline void FBmTexture::set_color(const float r, const float g, const float b) {    color.r = r;    color.g = g;    color.b = b;}inline void FBmTexture::set_min_value(const float min) {    min_value = min;}inline void FBmTexture::set_max_value(const float max) {    max_value = max;}