#5 29.2 Implementing Textures

Add ConstantColor class.

CMakeLists.txt

@@ -177,6 +177,8 @@ set (SOURCE_SCENEBUILDERS
 set (SOURCE_TEXTURES
   src/Textures/Checker3D.cpp
   src/Textures/Checker3D.h
+  src/Textures/ConstantColor.cpp
+  src/Textures/ConstantColor.h
   src/Textures/Texture.cpp
   src/Textures/Texture.h
 )

src/Textures/ConstantColor.cpp

@@ -0,0 +1,17 @@
+//  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 "ConstantColor.h"
+
+RGBColor ConstantColor::get_color(const ShadeRec& sr) const {
+    return color;
+}

src/Textures/ConstantColor.h

@@ -0,0 +1,33 @@
+//  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.
+
+#ifndef __CONSTANTCOLOR__
+#define __CONSTANTCOLOR__
+
+#include "Texture.h"
+#include "../Utilities/RGBColor.h"
+
+class ConstantColor : public Texture {
+public:
+
+    void set_color(const RGBColor& c);
+
+    RGBColor get_color(const ShadeRec& sr) const override;
+
+private:
+
+    RGBColor color = RGBColor::white;
+};
+
+inline void ConstantColor::set_color(const RGBColor &c) { color = c; }
+
+#endif