Fix 8.3. Tesselation

- CMake: Handle *.tcs and *.tes shader files
- avoid directory name “resources”, since it triggers weird behaviour of glfwInit() on mac os (see remarks at https://www.glfw.org/docs/3.3/group__init.html#ga317aac130a235ab08c6db0834907d85e)
- shader loader: print exception messages

CMakeLists.txt

@@ -179,8 +179,8 @@ set(GUEST_ARTICLES
 	8.guest/2021/1.scene/1.scene_graph
 	8.guest/2021/1.scene/2.frustum_culling
 	8.guest/2021/2.csm
-	#8.guest/2021/3.tessellation/terrain_gpu_dist
-	#8.guest/2021/3.tessellation/terrain_cpu_src
+	8.guest/2021/3.tessellation/terrain_gpu_dist
+	8.guest/2021/3.tessellation/terrain_cpu_src
 	8.guest/2021/4.dsa
 	8.guest/2022/5.computeshader_helloworld
 	8.guest/2022/6.physically_based_bloom
@@ -208,6 +208,8 @@ function(create_project_from_sources chapter demo)
             "src/${chapter}/${demo}/*.cpp"
             "src/${chapter}/${demo}/*.vs"
             "src/${chapter}/${demo}/*.fs"
+            "src/${chapter}/${demo}/*.tcs"
+            "src/${chapter}/${demo}/*.tes"
             "src/${chapter}/${demo}/*.gs"
             "src/${chapter}/${demo}/*.cs"
     )
@@ -239,6 +241,8 @@ function(create_project_from_sources chapter demo)
              "src/${chapter}/${demo}/*.vs"
              # "src/${chapter}/${demo}/*.frag"
              "src/${chapter}/${demo}/*.fs"
+             "src/${chapter}/${demo}/*.tcs"
+             "src/${chapter}/${demo}/*.tes"
              "src/${chapter}/${demo}/*.gs"
              "src/${chapter}/${demo}/*.cs"
     )

includes/learnopengl/shader_t.h

@@ -76,7 +76,8 @@ public:
         }
         catch (std::ifstream::failure& e)
         {
-            std::cout << "ERROR::SHADER::FILE_NOT_SUCCESSFULLY_READ" << std::endl;
+            std::cout << "ERROR::SHADER::FILE_NOT_SUCCESSFULLY_READ: " 
+                << e.what() << std::endl;
         }
         const char* vShaderCode = vertexCode.c_str();
         const char * fShaderCode = fragmentCode.c_str();

src/8.guest/2021/3.tessellation/terrain_cpu_src/main.cpp

@@ -90,7 +90,7 @@ int main()
     // The FileSystem::getPath(...) is part of the GitHub repository so we can find files on any IDE/platform; replace it with your own image path.
     stbi_set_flip_vertically_on_load(true);
     int width, height, nrChannels;
-    unsigned char *data = stbi_load("resources/heightmaps/iceland_heightmap.png", &width, &height, &nrChannels, 0);
+    unsigned char *data = stbi_load("heightmaps/iceland_heightmap.png", &width, &height, &nrChannels, 0);
     if (data)
     {
         std::cout << "Loaded heightmap of size " << height << " x " << width << std::endl;

src/8.guest/2021/3.tessellation/terrain_gpu_dist/main.cpp

@@ -103,7 +103,7 @@ int main()
     // load image, create texture and generate mipmaps
     int width, height, nrChannels;
     // The FileSystem::getPath(...) is part of the GitHub repository so we can find files on any IDE/platform; replace it with your own image path.
-    unsigned char *data = stbi_load("resources/heightmaps/iceland_heightmap.png", &width, &height, &nrChannels, 0);
+    unsigned char *data = stbi_load("heightmaps/iceland_heightmap.png", &width, &height, &nrChannels, 0);
     if (data)
     {
         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);