Started working on 2D patterns.

source/CMakeLists.txt

@@ -8,7 +8,8 @@ endif()
 # First most is build as a library
 add_library(rayonnement STATIC)
 
-file(GLOB RAY_HEADERS ${CMAKE_CURRENT_SOURCE_DIR}/include/*.h ${CMAKE_CURRENT_SOURCE_DIR}/pattern/*.h)
+file(GLOB RAY_HEADERS ${CMAKE_CURRENT_SOURCE_DIR}/include/*.h ${CMAKE_CURRENT_SOURCE_DIR}/pattern/*.h
+                      ${CMAKE_CURRENT_SOURCE_DIR}/uvpattern/*.h)
 
 file(GLOB RAY_SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/*.cpp ${CMAKE_CURRENT_SOURCE_DIR}/shapes/*.cpp
                       ${CMAKE_CURRENT_SOURCE_DIR}/worldbuilder/*.cpp)

source/include/uv_pattern.h

@@ -0,0 +1,28 @@
+/*
+ *  DoRayMe - a quick and dirty Raytracer
+ *  UV Pattern header
+ *
+ *  Created by Manoël Trapier
+ *  Copyright (c) 2020 986-Studio.
+ *
+ */
+#ifndef DORAYME_UV_PATTERN_H
+#define DORAYME_UV_PATTERN_H
+
+#include <colour.h>
+
+class UVPattern
+{
+public:
+    Colour a;
+    Colour b;
+    double width;
+    double height;
+
+    UVPattern(double width, double height, Colour a, Colour b) : a(a), b(b),
+                                                                 width(width), height(height) {};
+
+    virtual Colour uvPatternAt(double u, double v) = 0;
+};
+
+#endif /* DORAYME_UV_PATTERN_H */

source/uvpattern/uv_checkers.h

@@ -0,0 +1,32 @@
+/*
+ *  DoRayMe - a quick and dirty Raytracer
+ *  UV Checkers header
+ *
+ *  Created by Manoël Trapier
+ *  Copyright (c) 2020 986-Studio.
+ *
+ */
+#ifndef DORAYME_UV_CHECKERS_H
+#define DORAYME_UV_CHECKERS_H
+
+#include <uv_pattern.h>
+#include <math.h>
+
+class UVCheckers : public UVPattern
+{
+public:
+    UVCheckers(double width, double height, Colour a, Colour b) : UVPattern(width, height, a, b) {};
+
+    Colour uvPatternAt(double u, double v) {
+        double u2 = floor(u * this->width);
+        double v2 = floor(v * this->width);
+
+        if (fmod((u2 + v2), 2) == 0)
+        {
+            return this->a;
+        }
+        return this->b;
+    };
+};
+
+#endif /* DORAYME_UV_CHECKERS_H */

tests/CMakeLists.txt

@@ -10,7 +10,7 @@ set(TESTS_SRC math_test.cpp tuple_test.cpp colour_test.cpp canvas_test.cpp matri
 
 add_executable(testMyRays)
 target_include_directories(testMyRays PUBLIC ${gtest_SOURCE_DIR}/include ${gtest_SOURCE_DIR})
-target_include_directories(testMyRays PUBLIC ../source/include)
+target_include_directories(testMyRays PUBLIC ../source/include ../source/patter ../source/uvpattern)
 target_sources(testMyRays PRIVATE ${TESTS_SRC})
 target_link_libraries(testMyRays gtest gtest_main rayonnement Threads::Threads)
 

tests/pattern_test.cpp

@@ -18,6 +18,8 @@
 #include <sphere.h>
 #include <gtest/gtest.h>
 #include <material.h>
+#include <uv_pattern.h>
+#include <uv_checkers.h>
 
 #ifdef ENABLE_LUA_SUPPORT
 extern "C" {
@@ -260,4 +262,15 @@ TEST(PatternTest, Simple_test_of_a_lua_pattern)
 
     lua_close(L);
 }
-#endif
+#endif
+
+TEST(PatternTest, Checkers_pattern_in_2D)
+{
+    UVCheckers checkers = UVCheckers(2, 2, black, white);
+
+    ASSERT_EQ(checkers.uvPatternAt(0.0, 0.0), black);
+    ASSERT_EQ(checkers.uvPatternAt(0.5, 0.0), white);
+    ASSERT_EQ(checkers.uvPatternAt(0.0, 0.5), white);
+    ASSERT_EQ(checkers.uvPatternAt(0.5, 0.5), black);
+    ASSERT_EQ(checkers.uvPatternAt(1.0, 1.0), black);
+}