Update the gitignore and header gurd.

Author: ZzzhHe

.gitignore

@@ -14,4 +14,4 @@ tools/opensbi/build
 .idea
 3rd
 Doxyfile
-include/config.h
+src/include/config.h

src/include/config.h

@@ -1,4 +1,5 @@
-#pragma once
+#ifndef SIMPLERENDER_SRC_INCLUDE_FACE_HPP_
+#define SIMPLERENDER_SRC_INCLUDE_FACE_HPP_
 
 #include <array>
 
@@ -76,3 +77,5 @@ class Face {
 };
 
 }  // namespace simple_renderer
+
+#endif

src/include/face.hpp

@@ -1,4 +1,5 @@
-#pragma once
+#ifndef SIMPLERENDER_SRC_INCLUDE_MATERIAL_HPP_
+#define SIMPLERENDER_SRC_INCLUDE_MATERIAL_HPP_
 
 #include <math.hpp>
 
@@ -36,4 +37,6 @@ class Material {
   Vector3f specular;
 };
 
-}  // namespace simple_renderer
+}  // namespace simple_renderer
+
+#endif

src/include/material.hpp

@@ -1,4 +1,5 @@
-#pragma once
+#ifndef SIMPLERENDER_SRC_INCLUDE_MATH_HPP_
+#define SIMPLERENDER_SRC_INCLUDE_MATH_HPP_
 
 #include <glm/glm.hpp>
 
@@ -56,3 +57,5 @@ struct fmt::formatter<simple_renderer::Matrix4f> : fmt::formatter<std::string> {
     return fmt::format_to(ctx.out(), "\n{}", matrix_str);
   }
 };
+
+#endif

src/include/math.hpp

@@ -1,4 +1,5 @@
-#pragma once
+#ifndef SIMPLERENDER_SRC_INCLUDE_VERTEX_HPP_
+#define SIMPLERENDER_SRC_INCLUDE_VERTEX_HPP_
 
 #include <math.hpp>
 
@@ -63,4 +64,6 @@ class Vertex {
   Color color_;
 };
 
-}  // namespace simple_renderer
+}  // namespace simple_renderer
+
+#endif