Changeset 06d959f in opengl-game for vulkan-game.hpp

Timestamp:

Nov 27, 2019, 5:19:23 PM (5 years ago)

Author:

Dmitry Portnoy <dmp1488@…>

Branches:

feature/imgui-sdl, master, points-test

Children:

e1308e8

Parents:

0cf1a23

Message:

Add an addVertexNormals method to VulkanGame that calculates the normals given a list of vertices

File:

• vulkan-game.hpp (modified) (3 diffs)

vulkan-game.hpp

@@ -32 +32 @@
    vec3 pos;
    vec3 color;
+   vec3 normal;
 };
 
@@ -158 +159 @@
       void createSyncObjects();
 
+      template<class VertexType>
+      vector<VertexType> addVertexNormals(vector<VertexType> vertices);
+
       template<class UniformType>
       void createUniformBuffers(vector<VkBuffer>& buffers, vector<VkDeviceMemory>& buffersMemory,
@@ -191 +195 @@
 }
 
+template<class VertexType>
+vector<VertexType> VulkanGame::addVertexNormals(vector<VertexType> vertices) {
+   for (unsigned int i = 0; i < vertices.size(); i += 3) {
+      vec3 p1 = vertices[i].pos;
+      vec3 p2 = vertices[i+1].pos;
+      vec3 p3 = vertices[i+2].pos;
+
+      vec3 normal = normalize(cross(p2 - p1, p3 - p1));
+      normal.z = -normal.z;
+
+      // Add the same normal for all 3 vertices
+      vertices[i].normal = normal;
+      vertices[i+1].normal = normal;
+      vertices[i+2].normal = normal;
+   }
+
+   return vertices;
+}
+
 #endif // _VULKAN_GAME_H