From b7a1dad6bb9da01121734a5c03a376f3b8c55a6a Mon Sep 17 00:00:00 2001
From: Eduard Mandy <mandyedi@gmail.com>
Date: Sun, 1 Dec 2024 19:23:45 +0100
Subject: [PATCH] #5 31.4 Basic Noise Textures

Add FBmTexture.
---
 CMakeLists.txt              | 2 ++
 src/Textures/FBmTexture.cpp | 1 +
 src/Textures/FBmTexture.h   | 1 +
 3 files changed, 4 insertions(+)
 create mode 100644 src/Textures/FBmTexture.cpp
 create mode 100644 src/Textures/FBmTexture.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f62aa93..f822680 100644
--- a/CMakeLists.txt
+++ b/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
diff --git a/src/Textures/FBmTexture.cpp b/src/Textures/FBmTexture.cpp
new file mode 100644
index 0000000..619a4e1
--- /dev/null
+++ b/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);
    }
}
\ No newline at end of file
diff --git a/src/Textures/FBmTexture.h b/src/Textures/FBmTexture.h
new file mode 100644
index 0000000..6b4b6d3
--- /dev/null
+++ b/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;
}
\ No newline at end of file