Implemented basic normal-dot product shading, preparing for more complex methods such as Blinn-Phong and PBR

assets/models/UVSphere.mtl

@@ -0,0 +1,2 @@
+# Blender 4.2.3 LTS MTL File: 'None'
+# www.blender.org

assets/models/untitled.mtl

@@ -1,12 +1,2 @@
 # Blender 4.2.3 LTS MTL File: 'None'
 # www.blender.org
-
-newmtl Material
-Ns 250.000000
-Ka 1.000000 1.000000 1.000000
-Ks 0.500000 0.500000 0.500000
-Ke 0.000000 0.000000 0.000000
-Ni 1.450000
-d 1.000000
-illum 2
-map_Kd /home/lillian/Downloads/d41777258e68c9d7046fc03c4d1d1e89.png

assets/models/untitled.obj

@@ -0,0 +1,39 @@
+# Blender 4.2.3 LTS
+# www.blender.org
+mtllib untitled.mtl
+o Cube
+v -6.996062 0.060240 6.002291
+v -6.996062 0.123414 6.002291
+v -6.996062 0.060240 -6.002291
+v -6.996062 0.123414 -6.002291
+v 6.996062 0.060240 6.002291
+v 6.996062 0.123414 6.002291
+v 6.996062 0.060240 -6.002291
+v 6.996062 0.123414 -6.002291
+vn -1.0000 -0.0000 -0.0000
+vn -0.0000 -0.0000 -1.0000
+vn 1.0000 -0.0000 -0.0000
+vn -0.0000 -0.0000 1.0000
+vn -0.0000 -1.0000 -0.0000
+vn -0.0000 1.0000 -0.0000
+vt 0.561014 0.000000
+vt 0.625000 0.000000
+vt 0.625000 0.250000
+vt 0.561014 0.250000
+vt 0.625000 0.500000
+vt 0.561014 0.500000
+vt 0.625000 0.750000
+vt 0.561014 0.750000
+vt 0.625000 1.000000
+vt 0.561014 1.000000
+vt 0.125000 0.500000
+vt 0.125000 0.750000
+vt 0.875000 0.500000
+vt 0.875000 0.750000
+s 0
+f 1/1/1 2/2/1 4/3/1 3/4/1
+f 3/4/2 4/3/2 8/5/2 7/6/2
+f 7/6/3 8/5/3 6/7/3 5/8/3
+f 5/8/4 6/7/4 2/9/4 1/10/4
+f 3/11/5 7/6/5 5/8/5 1/12/5
+f 8/5/6 4/13/6 2/14/6 6/7/6

imgui.ini

@@ -3,6 +3,6 @@ Pos=60,60
 Size=400,400
 
 [Window][Agnosia Debug]
-Pos=40,377
+Pos=57,392
 Size=623,438
 

src/agnosiaimgui.cpp

@@ -23,8 +23,8 @@ void initImGuiWindow() {
   }
 
   ImGui::DragFloat3("Camera Position", Graphics::getCamPos());
+  ImGui::DragFloat3("Light Position", Graphics::getLightPos());
   ImGui::DragFloat3("Center Position", Graphics::getCenterPos());
-  ImGui::DragFloat3("Up Direction", Graphics::getUpDir());
   ImGui::DragFloat("Depth of Field", &Graphics::getDepthField(), 0.1f, 1.0f,
                    180.0f, NULL, ImGuiSliderFlags_AlwaysClamp);
   ImGui::DragFloat2("Near and Far fields", Graphics::getDistanceField());

src/entrypoint.cpp

@@ -87,24 +87,24 @@ void createInstance() {
     throw std::runtime_error("failed to create instance!");
   }
 }
-
-void initVulkan() {
-  Material *vikingRoomMaterial =
-      new Material("vikingRoomMaterial", "assets/textures/viking_room.png");
+void initAgnosia() {
+  Material *sphereMaterial =
+      new Material("sphereMaterial", "assets/textures/checkermap.png");
   Material *stanfordDragonMaterial =
       new Material("stanfordDragonMaterial", "assets/textures/checkermap.png");
   Material *teapotMaterial =
       new Material("teapotMaterial", "assets/textures/checkermap.png");
-  Model *vikingRoom =
-      new Model("vikingRoom", *vikingRoomMaterial,
-                "assets/models/viking_room.obj", glm::vec3(0.0f, 0.0f, 0.0f));
+  Model *uvSphere =
+      new Model("uvSphere", *sphereMaterial, "assets/models/UVSphere.obj",
+                glm::vec3(0.0f, 0.0f, 0.0f));
   Model *stanfordDragon = new Model("stanfordDragon", *stanfordDragonMaterial,
                                     "assets/models/StanfordDragon800k.obj",
                                     glm::vec3(0.0f, 2.0f, 0.0f));
   Model *teapot =
       new Model("teapot", *teapotMaterial, "assets/models/teapot.obj",
                 glm::vec3(1.0f, -3.0f, -1.0f));
-
+}
+void initVulkan() {
   // Initialize volk and continue if successful.
   volkInitialize();
   // Initialize vulkan and set up pipeline.
@@ -122,9 +122,7 @@ void initVulkan() {
   Graphics::createCommandPool();
   // Image creation MUST be after command pool, because command
   // buffers.
-  vikingRoom->populateData();
-  stanfordDragon->populateData();
-  teapot->populateData();
+  Model::populateModels();
   Texture::createMaterialTextures(Model::getInstances());
   Texture::createColorResources();
   Texture::createDepthResources();
@@ -150,6 +148,11 @@ void mainLoop() {
 void cleanup() {
   Render::cleanupSwapChain();
   Graphics::destroyGraphicsPipeline();
+  Buffers::destroyDescriptorPool();
+  Model::destroyTextures();
+
+  vkDestroyDescriptorSetLayout(DeviceControl::getDevice(),
+                               Buffers::getDescriptorSetLayout(), nullptr);
 
   Buffers::destroyBuffers();
   Render::destroyFenceSemaphores();
@@ -179,6 +182,7 @@ GLFWwindow *EntryApp::getWindow() { return window; }
 void EntryApp::run() {
 
   initWindow();
+  initAgnosia();
   initVulkan();
   mainLoop();
   cleanup();

src/graphics/buffers.cpp

@@ -122,6 +122,9 @@ void Buffers::createDescriptorPool() {
     throw std::runtime_error("failed to create descriptor pool!");
   }
 }
+void Buffers::destroyDescriptorPool() {
+  vkDestroyDescriptorPool(DeviceControl::getDevice(), descriptorPool, nullptr);
+}
 void Buffers::createDescriptorSet(std::vector<Model *> models) {
   VkDescriptorSetAllocateInfo allocInfo{};
   allocInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;

src/graphics/buffers.h

@@ -19,6 +19,7 @@ public:
   static void createDescriptorSetLayout();
   static void createDescriptorSet(std::vector<Model *> models);
   static void createDescriptorPool();
+  static void destroyDescriptorPool();
   static void createBuffer(VkDeviceSize size, VkBufferUsageFlags usage,
                            VkMemoryPropertyFlags props, VkBuffer &buffer,
                            VkDeviceMemory &bufferMemory);

src/graphics/graphicspipeline.cpp

@@ -13,6 +13,7 @@
 #include <iostream>
 #include <vulkan/vulkan_core.h>
 
+float lightPos[4] = {5.0f, 5.0f, 5.0f, 0.44f};
 float camPos[4] = {3.0f, 3.0f, 3.0f, 0.44f};
 float centerPos[4] = {0.0f, 0.0f, 0.0f, 0.44f};
 float upDir[4] = {0.0f, 0.0f, 1.0f, 0.44f};
@@ -363,6 +364,7 @@ void Graphics::recordCommandBuffer(VkCommandBuffer commandBuffer,
     Agnosia_T::GPUPushConstants pushConsts;
     pushConsts.vertexBuffer = model->getBuffers().vertexBufferAddress;
     pushConsts.objPosition = model->getPos();
+    pushConsts.lightPos = glm::vec3(lightPos[0], lightPos[1], lightPos[2]);
     pushConsts.textureID = texID;
 
     pushConsts.model =
@@ -433,6 +435,7 @@ void Graphics::recordCommandBuffer(VkCommandBuffer commandBuffer,
 }
 
 float *Graphics::getCamPos() { return camPos; }
+float *Graphics::getLightPos() { return lightPos; }
 float *Graphics::getCenterPos() { return centerPos; }
 float *Graphics::getUpDir() { return upDir; }
 float &Graphics::getDepthField() { return depthField; }

src/graphics/graphicspipeline.h

@@ -15,6 +15,7 @@ public:
                                   uint32_t imageIndex);
 
   static float *getCamPos();
+  static float *getLightPos();
   static float *getCenterPos();
   static float *getUpDir();
   static float &getDepthField();

src/graphics/model.cpp

@@ -20,15 +20,21 @@
 
 std::vector<Model *> Model::instances;
 VmaAllocator _allocator;
+// chatgpt did this and the haters can WEEP fuck hash functions.
 namespace std {
 template <> struct hash<Agnosia_T::Vertex> {
   size_t operator()(Agnosia_T::Vertex const &vertex) const {
-    return ((hash<glm::vec3>()(vertex.pos) ^
-             (hash<glm::vec3>()(vertex.color) << 1)) >>
-            1) ^
-           (hash<glm::vec2>()(vertex.texCoord) << 1);
+    size_t hashPos = hash<glm::vec3>()(vertex.pos);
+    size_t hashColor = hash<glm::vec3>()(vertex.color);
+    size_t hashUV = hash<glm::vec2>()(vertex.uv);
+    size_t hashNormal = hash<glm::vec3>()(vertex.normal);
+
+    // Combine all hashes
+    return ((hashPos ^ (hashColor << 1)) >> 1) ^ (hashUV << 1) ^
+           (hashNormal << 2);
   }
 };
+
 } // namespace std
 void Model::createMemoryAllocator(VkInstance vkInstance) {
   VmaVulkanFunctions vulkanFuncs{
@@ -105,7 +111,8 @@ Model::Model(const std::string &modelID, const Material &material,
   instances.push_back(this);
 }
 
-void Model::populateData() {
+void Model::populateModels() {
+  for (Model *model : getInstances()) {
 
     std::vector<Agnosia_T::Vertex> vertices;
     // Index buffer definition, showing which points to reuse.
@@ -113,7 +120,7 @@ void Model::populateData() {
     tinyobj::ObjReaderConfig readerConfig;
     tinyobj::ObjReader reader;
 
-  if (!reader.ParseFromFile(modelPath, readerConfig)) {
+    if (!reader.ParseFromFile(model->modelPath, readerConfig)) {
       if (!reader.Error().empty()) {
         throw std::runtime_error(reader.Error());
       }
@@ -136,12 +143,15 @@ void Model::populateData() {
                       attrib.vertices[3 * index.vertex_index + 1],
                       attrib.vertices[3 * index.vertex_index + 2]};
 
+        vertex.normal = {attrib.normals[3 * index.normal_index + 0],
+                         attrib.normals[3 * index.normal_index + 1],
+                         attrib.normals[3 * index.normal_index + 2]};
         // TODO: Small fix here, handle if there are no UV's unwrapped for the
         // model.
         //       As of now, if it is not unwrapped, it segfaults on texCoord
         //       assignment. Obviously we should always have UV's, but it
         //       shouldn't crash, just unwrap in a default method.
-      vertex.texCoord = {attrib.texcoords[2 * index.texcoord_index + 0],
+        vertex.uv = {attrib.texcoords[2 * index.texcoord_index + 0],
                      1.0f - attrib.texcoords[2 * index.texcoord_index + 1]};
         vertex.color = {1.0f, 1.0f, 1.0f};
 
@@ -158,7 +168,8 @@ void Model::populateData() {
 
     Agnosia_T::GPUMeshBuffers newSurface;
 
-  // Create a Vertex Buffer here, infinitely easier than the old Vulkan method!
+    // Create a Vertex Buffer here, infinitely easier than the old Vulkan
+    // method!
     newSurface.vertexBuffer = createBuffer(
         vertexBufferSize,
         VK_BUFFER_USAGE_STORAGE_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT |
@@ -169,8 +180,8 @@ void Model::populateData() {
         .sType = VK_STRUCTURE_TYPE_BUFFER_DEVICE_ADDRESS_INFO,
         .buffer = newSurface.vertexBuffer.buffer,
     };
-  newSurface.vertexBufferAddress =
-      vkGetBufferDeviceAddress(DeviceControl::getDevice(), &deviceAddressInfo);
+    newSurface.vertexBufferAddress = vkGetBufferDeviceAddress(
+        DeviceControl::getDevice(), &deviceAddressInfo);
 
     // Create the index buffer to iterate over and check for duplicate vertices
     newSurface.indexBuffer = createBuffer(indexBufferSize,
@@ -178,9 +189,9 @@ void Model::populateData() {
                                               VK_BUFFER_USAGE_TRANSFER_DST_BIT,
                                           VMA_MEMORY_USAGE_GPU_ONLY);
 
-  Agnosia_T::AllocatedBuffer stagingBuffer =
-      createBuffer(vertexBufferSize + indexBufferSize,
-                   VK_BUFFER_USAGE_TRANSFER_SRC_BIT, VMA_MEMORY_USAGE_CPU_ONLY);
+    Agnosia_T::AllocatedBuffer stagingBuffer = createBuffer(
+        vertexBufferSize + indexBufferSize, VK_BUFFER_USAGE_TRANSFER_SRC_BIT,
+        VMA_MEMORY_USAGE_CPU_ONLY);
 
     void *data = stagingBuffer.allocation->GetMappedData();
 
@@ -203,14 +214,25 @@ void Model::populateData() {
       indexCopy.srcOffset = vertexBufferSize;
       indexCopy.size = indexBufferSize;
 
-    vkCmdCopyBuffer(cmd, stagingBuffer.buffer, newSurface.indexBuffer.buffer, 1,
-                    &indexCopy);
+      vkCmdCopyBuffer(cmd, stagingBuffer.buffer, newSurface.indexBuffer.buffer,
+                      1, &indexCopy);
     });
-  vmaDestroyBuffer(_allocator, stagingBuffer.buffer, stagingBuffer.allocation);
+    vmaDestroyBuffer(_allocator, stagingBuffer.buffer,
+                     stagingBuffer.allocation);
 
-  this->buffers = newSurface;
-  this->objPosition = objPosition;
-  this->indiceCount = indices.size();
+    model->buffers = newSurface;
+    model->indiceCount = indices.size();
+  }
+}
+void Model::destroyTextures() {
+  for (Model *model : Model::getInstances()) {
+    vkDestroySampler(DeviceControl::getDevice(),
+                     model->getMaterial().getTextureSampler(), nullptr);
+    vkDestroyImageView(DeviceControl::getDevice(),
+                       model->getMaterial().getTextureView(), nullptr);
+    vkDestroyImage(DeviceControl::getDevice(),
+                   model->getMaterial().getTextureImage(), nullptr);
+  }
 }
 
 std::string Model::getID() { return this->ID; }

src/graphics/model.h

@@ -28,7 +28,8 @@ public:
   static void createMemoryAllocator(VkInstance instance);
   static const std::vector<Model *> &getInstances();
 
-  void populateData();
+  static void populateModels();
+  static void destroyTextures();
 
   Agnosia_T::GPUMeshBuffers getBuffers();
   std::string getID();

src/shaders/common.glsl

@@ -4,6 +4,7 @@
 
 struct Vertex {
     vec3 pos;
+    vec3 normal;
     vec3 color;
     vec2 texCoord;
 }; 
@@ -14,6 +15,7 @@ layout(buffer_reference, scalar) readonly buffer VertexBuffer{
 layout( push_constant, scalar ) uniform constants {
     VertexBuffer vertBuffer;
     vec3 objPos;
+    vec3 lightPos;
     int textureID;
     mat4 model;
     mat4 view;

src/shaders/fragment.frag

@@ -5,11 +5,18 @@
 layout(binding = 1) uniform sampler2D texSampler[];
 
 
-layout(location = 0) in vec3 fragColor;
-layout(location = 1) in vec2 fragTexCoord;
+layout(location = 0) in vec3 v_norm;
+layout(location = 1) in vec3 v_pos;
+layout(location = 2) in vec2 texCoord;
 
 layout(location = 0) out vec4 outColor;
 
 void main() {
-  outColor = texture(texSampler[PushConstants.textureID], fragTexCoord);
+  vec3 diffuseColor = texture(texSampler[PushConstants.textureID], texCoord).rgb;
+  vec3 ambientColor = vec3(0.05f,0.05f, 0.05f) * diffuseColor;
+  float lightPower = 5;
+  vec3 lightColor = vec3(1.0f, 1.0f, 1.0f);
+  float cosTheta = dot(PushConstants.lightPos, v_norm);
+  float sqrDist = distance(v_pos, PushConstants.lightPos)*distance(v_pos, PushConstants.lightPos);
+  outColor = vec4(ambientColor + clamp(diffuseColor * lightColor * lightPower * cosTheta / sqrDist, vec3(0,0,0), vec3(1,1,1)), 1.0f);
 }

src/shaders/vertex.vert

@@ -2,14 +2,16 @@
 #extension GL_GOOGLE_include_directive : enable
 #include "common.glsl"
 
-layout(location = 0) out vec3 fragColor;
-layout(location = 1) out vec2 fragTexCoord;
+layout(location = 0) out vec3 v_norm;
+layout(location = 1) out vec3 v_pos;
+layout(location = 2) out vec2 texCoord;
 
 void main() {
     Vertex vertex = PushConstants.vertBuffer.vertices[gl_VertexIndex];
     
     gl_Position = PushConstants.proj * PushConstants.view * PushConstants.model * 
                     vec4(vertex.pos + PushConstants.objPos, 1.0f);
-    fragColor = vertex.color.rgb;
-    fragTexCoord = vertex.texCoord;
+    v_norm = vertex.normal;
+    v_pos = vertex.pos;
+    texCoord = vertex.texCoord;
 }

src/types.h

@@ -10,12 +10,13 @@ public:
     // This defines what a vertex is!
     // We control the position, color and texture coordinate here!
     glm::vec3 pos;
+    glm::vec3 normal;
     glm::vec3 color;
-    glm::vec2 texCoord;
+    glm::vec2 uv;
 
     bool operator==(const Vertex &other) const {
-      return pos == other.pos && color == other.color &&
-             texCoord == other.texCoord;
+      return pos == other.pos && normal == other.normal &&
+             color == other.color && uv == other.uv;
     }
   };
   struct AllocatedBuffer {
@@ -31,6 +32,7 @@ public:
   struct GPUPushConstants {
     VkDeviceAddress vertexBuffer;
     glm::vec3 objPosition;
+    glm::vec3 lightPos;
     int textureID;
     glm::mat4 model;
     glm::mat4 view;