Merge pull request #1 from illegitimate-egg/cmake-irc

Fix Everything

.github/workflows/compile.yml

@@ -0,0 +1,32 @@
+name: Test Compilation
+
+on:
+  push:
+    branches: [ $default-branch ]
+  pull_request:
+    branches: [ $default-branch ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install python depdencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install jinja2
+    - name: Install dependencies
+      run: |
+        DEBIAN_FRONTEND=noninteractive apt update -y
+        DEBIAN_FRONTEND=noninteractive apt install -y build-essential cmake pkg-config mesa-utils mesa-common-dev libao-dev libxrandr-dev libxinerama-dev libxcursor-dev libxi-dev
+    - name: CMake build files
+      run: |
+        mkdir build
+        cd build
+        cmake ..
+    - name: Build project
+      run: |
+        cd build
+        make

.gitmodules

@@ -1,30 +1,27 @@
-[submodule "SOIL2"]
-	path = SOIL2
+[submodule "extern/SOIL2"]
+	path = extern/SOIL2
 	url = https://github.com/SpartanJ/SOIL2
-[submodule "include/SOIL2"]
-	path = include/SOIL2
-	url = https://github.com/SpartanJ/SOIL2
-[submodule "include/assimp"]
-	path = include/assimp
+[submodule "extern/assimp"]
+	path = extern/assimp
 	url = https://github.com/assimp/assimp
-[submodule "include/glew"]
-	path = include/glew
+[submodule "extern/glew"]
+	path = extern/glew
 	url = https://github.com/nigels-com/glew
-[submodule "include/glfw"]
-	path = include/glfw
+[submodule "extern/glfw"]
+	path = extern/glfw
 	url = https://github.com/glfw/glfw
-[submodule "include/glm"]
-	path = include/glm
+[submodule "extern/glm"]
+	path = extern/glm
 	url = https://github.com/g-truc/glm
-[submodule "include/imgui"]
-	path = include/imgui
+[submodule "extern/imgui"]
+	path = extern/imgui
 	url = https://github.com/ocornut/imgui
-[submodule "include/CLog"]
-	path = include/CLog
+[submodule "extern/CLog"]
+	path = extern/CLog
 	url = https://github.com/williamistGitHub/CLog.git
-[submodule "include/glad"]
-	path = include/glad
+[submodule "extern/glad"]
+	path = extern/glad
 	url = https://github.com/Dav1dde/glad.git
-[submodule "include/imGuIZMO.quat"]
-	path = include/imGuIZMO.quat
-	url = https://github.com/BrutPitt/imGuIZMO.quat.git
+[submodule "extern/imGuIZMO.quat"]
+	path = extern/imGuIZMO.quat
+	url = https://github.com/BrutPitt/imGuIZMO.quat

CMakeLists.txt

@@ -30,60 +30,31 @@ if(CMAKE_BINARY_DIR MATCHES " ")
     WARNING "Spaces in the build dir can cause errors, thou art been warned\n")
 endif()
 
-add_subdirectory(include/glm)
-add_subdirectory(include/glfw)
-add_subdirectory(include/SOIL2)
-add_subdirectory(include/assimp)
-add_subdirectory(include/CLog)
+add_subdirectory(extern/glm)
+add_subdirectory(extern/glfw)
+add_subdirectory(extern/SOIL2)
+add_subdirectory(extern/assimp)
+add_subdirectory(extern/CLog)
 
 # Glad is configured using cmake (unlike glew)
 # https://github.com/Dav1dde/glad/wiki/C#cmake
-set(GLAD_SOURCES_DIR "${PROJECT_SOURCE_DIR}/include/glad")
+set(GLAD_SOURCES_DIR "${PROJECT_SOURCE_DIR}/extern/glad")
 add_subdirectory("${GLAD_SOURCES_DIR}/cmake" glad_cmake)
 
 glad_add_library(glad_gl_core_33 REPRODUCIBLE API gl:core=3.3)
 
-include_directories(include/imgui) # ImGui doesn't have a CMakeLists of its own
+include_directories(extern/imgui) # ImGui doesn't have a CMakeLists of its own
 add_library(
   imgui STATIC
-  include/imgui/imgui.cpp
-  include/imgui/imgui_demo.cpp
-  include/imgui/imgui_draw.cpp
-  include/imgui/imgui_tables.cpp
-  include/imgui/imgui_widgets.cpp
-  include/imgui/backends/imgui_impl_glfw.cpp # Zingaloid backend import
-  include/imgui/backends/imgui_impl_opengl3.cpp)
+  extern/imgui/imgui.cpp
+  extern/imgui/imgui_demo.cpp
+  extern/imgui/imgui_draw.cpp
+  extern/imgui/imgui_tables.cpp
+  extern/imgui/imgui_widgets.cpp
+  extern/imgui/backends/imgui_impl_glfw.cpp # Zingaloid backend import
+  extern/imgui/backends/imgui_impl_opengl3.cpp)
 target_link_libraries(imgui glfw)
 
-# include_directories(include) # Kill me please. this is horrendously bad but ImGuIZMO.quat hardcodes imgui to be in a folder called ImGui
-include_directories(include/imGuIZMO.quat)
-add_library(
-  imGuIZMO STATIC
-  include/imGuIZMO.quat/imGuIZMO.quat/imGuIZMOquat.cpp
-)
-target_link_libraries(imGuIZMO imgui -DIMGUIZMO_IMGUI_FOLDER=${CMAKE_SOURCE_DIR}/include/imgui)
-
-add_executable(fred engine.cpp shader.c)
-if(UNIX)
-  target_link_libraries(
-    fred
-    -lm
-    glad_gl_core_33
-    glm
-    glfw
-    soil2
-    assimp
-    imgui
-    clog)
-endif()
-if(WIN32)
-  target_link_libraries(
-    fred
-    glad_gl_core_33
-    glm
-    glfw
-    soil2
-    assimp
-    imgui
-    clog)
-endif()
+add_executable(fred src/engine.cpp src/shader.c)
+target_link_libraries(fred $<$<PLATFORM_ID:Linux>:-lm> glad_gl_core_33 glm glfw
+                      soil2 assimp imgui clog)

TODO.md

@@ -1,3 +1,28 @@
-[ ] Make ImGuIZMO.quat work
-[ ] Make SOIL2 stop giving that smelly error message
-[ ] Overhaul asset debug screen
+### Todo
+
+- [ ] Finish modularization
+- [ ] Lightmapped/Shadowmapped Lighting
+- [ ] Get ziggy with it
+- [ ] Convert manual memory alloc to shared and unique pointers
+- [ ] Text
+- [ ] RT/texture rendering
+- [ ] Additional constructors for arguements that are potentially optional
+- [ ] Billboards / Instancing
+- [ ] Multiple lights
+- [ ] Physics
+- [ ] Sound
+- [ ] Mesh deformation/animation
+
+### In progress
+
+- [ ] Tools for making UI, assets and other engine specific things
+  - [ ] Custom file formats
+  - [ ] Make ImGuIZMO.quat work
+
+### Done
+
+- [x] Implement Cameras
+- [x] Simple Lighting
+- [x] Overhaul asset debug screen
+- [x] Make SOIL2 stop giving that smelly error message (My PR was accepted)
+- [x] Destruct all at the end

extern/CLog

@@ -0,0 +1 @@
+Subproject commit 78f58ffefc782c3bcc0bccaf7df38b064da6f170

include/CLog

@@ -1 +0,0 @@
-Subproject commit 906059bd02731184f80d8b3e789e61c5499213d0

shaders/basic.vert

@@ -7,10 +7,10 @@ layout(location = 1) in vec2 vertexUV;
 out vec2 UV;
 
 // Model view projection from the CPU
-uniform mat4 MVP;
+uniform mat4 mvp;
 
 void main() {
-    gl_Position = MVP * vec4(vertexPosition_modelspace, 1);
+    gl_Position = mvp * vec4(vertexPosition_modelspace, 1);
     //gl_Position = vec4(vertexPosition_modelspace, 1);
 
     vec2 UV_FLIPPED;

shaders/basic_lit.frag

@@ -0,0 +1,34 @@
+#version 330 core
+
+in vec2 UV;
+in vec3 position_worldspace;
+in vec3 normal_cameraspace;
+in vec3 eyeDirection_cameraspace;
+in vec3 lightDirection_cameraspace;
+
+out vec3 color;
+
+uniform sampler2D albedoSampler;
+uniform sampler2D specularSampler;
+uniform mat4 mv; // mv of mvp (Model, View, Projection)
+uniform vec3 lightPosition_worldspace;
+uniform vec3 lightColor;
+uniform float lightPower;
+
+void main() {
+  vec3 materialDiffuseColor = texture(albedoSampler, UV).rgb;
+  vec3 materialAmbientColor = vec3(0.1, 0.1, 0.1) * materialDiffuseColor;
+  vec3 materialSpecularColor = texture(specularSampler, UV).rgb;
+
+  float distance = length(lightPosition_worldspace - position_worldspace);
+
+  vec3 n = normalize(normal_cameraspace);
+  vec3 l = normalize(lightDirection_cameraspace);
+  float cosTheta = clamp(dot(n, vec3(1.0)), 0, 1);
+
+  vec3 E = normalize(eyeDirection_cameraspace);
+  vec3 R = reflect(vec3(-1.0), n);
+  float cosAlpha = clamp(dot(E, R), 0, 1);
+
+  color = materialAmbientColor + materialDiffuseColor * lightColor * lightPower * cosTheta / (distance*distance) + materialSpecularColor * lightColor * lightPower * pow(cosAlpha, 5) / (distance * distance);
+}

shaders/basic_lit.vert

@@ -0,0 +1,32 @@
+#version 330 core
+
+layout(location = 0) in vec3 vertexPosition_modelspace;
+layout(location = 1) in vec2 vertexUV;
+layout(location = 2) in vec3 vertexNormal_modelspace;
+
+out vec2 UV;
+out vec3 position_worldspace;
+out vec3 normal_cameraspace;
+out vec3 eyeDirection_cameraspace;
+out vec3 lightDirection_cameraspace;
+
+uniform mat4 mvp;
+uniform mat4 v;
+uniform mat4 m;
+uniform vec3 lightPosition_worldspace;
+
+void main() {
+    gl_Position = mvp * vec4(vertexPosition_modelspace, 1);
+
+    position_worldspace = (m * vec4(vertexPosition_modelspace, 1)).xyz;
+
+    vec3 vertexPosition_cameraspace = (v * m * vec4(vertexPosition_modelspace, 1)).xyz;
+    eyeDirection_cameraspace = vec3(0, 0, 0) - vertexPosition_cameraspace;
+
+    vec3 lightPosition_cameraspace = (v * vec4(lightPosition_worldspace, 1)).xyz;
+    lightDirection_cameraspace = lightPosition_cameraspace + eyeDirection_cameraspace;
+
+    normal_cameraspace = (v * m * vec4(vertexNormal_modelspace, 0)).xyz;
+
+    UV = vertexUV;
+}

src/engine.cpp

@@ -15,9 +15,7 @@
 #define IMGUI_DEFINE_MATH_OPERATORS // ImGui
 #include <backends/imgui_impl_glfw.h>
 #include <backends/imgui_impl_opengl3.h>
-#include <imgui/imgui.h>
-#define VGIZMO_USES_GLM
-#include <imGuIZMO.quat/imGuIZMOquat.h>
+#include <imgui.h>
 #include <clog/clog.h>
 
 #include <SOIL2.h>
@@ -42,6 +40,7 @@ static bool loadModel(const char *path, std::vector<unsigned short> &indices,
                       std::vector<glm::vec3> &vertices,
                       std::vector<glm::vec2> &uvs,
                       std::vector<glm::vec3> &normals) {
+  clog_log(CLOG_LEVEL_DEBUG, "Loading model: %s", path);
   Assimp::Importer importer;
 
   const aiScene *scene = importer.ReadFile(
@@ -66,6 +65,10 @@ static bool loadModel(const char *path, std::vector<unsigned short> &indices,
   }
 
   normals.reserve(mesh->mNumVertices);
+  for (unsigned int i = 0; i < mesh->mNumVertices; i++) {
+    aiVector3D normal = mesh->mNormals[i];
+    normals.push_back(glm::vec3(normal.x, normal.y, normal.z));
+  }
   for (unsigned int i = 0; i < mesh->mNumFaces; i++) {
     indices.push_back(mesh->mFaces[i].mIndices[0]);
     indices.push_back(mesh->mFaces[i].mIndices[1]);
@@ -76,6 +79,7 @@ static bool loadModel(const char *path, std::vector<unsigned short> &indices,
 }
 
 GLuint loadTexture(const char *path) {
+  clog_log(CLOG_LEVEL_DEBUG, "Loading texture: %s", path);
   GLuint texture = SOIL_load_OGL_texture(
       path, SOIL_LOAD_AUTO,
       SOIL_CREATE_NEW_ID,
@@ -164,50 +168,123 @@ public:
   GLuint *elementBuffer;
 
   GLuint matrixID;
-  GLuint textureID;
+  GLuint viewMatrixID;
+  GLuint modelMatrixID;
+
+  GLuint albedoTextureID;
+  GLuint specularTextureID;
+
+  GLuint lightID;
+  GLuint lightColor;
+  GLuint lightPower;
 
   glm::vec3 position = glm::vec3(0.0f, 0.0f, 0.0f);
   glm::quat rotation = glm::quat(1.0f, 0.0f, 0.0f, 0.0f); // https://en.wikipedia.org/wiki/Quaternion
   glm::vec3 scaling = glm::vec3(1.0f, 1.0f, 1.0f);
 
-  GLuint *modelTexture;
+  GLuint *albedoTexture;
+  GLuint *specularTexture;
 
   GLuint *shaderProgram;
 
-  Asset(Model &model, Texture &texture, Shader &shader) {
+  Asset(Model &model, Texture &albedoTextureI, Texture &specularTextureI, Shader &shader) {
     indices = &model.indices;
     vertexBuffer = &model.vertexBuffer;
     uvBuffer = &model.uvBuffer;
     normalBuffer = &model.normalBuffer;
     elementBuffer = &model.elementBuffer;
 
-    modelTexture = &texture.texture;
+    albedoTexture = &albedoTextureI.texture;
+    specularTexture = &specularTextureI.texture;
 
     shaderProgram = &shader.shaderProgram;
 
-    matrixID = glGetUniformLocation(*shaderProgram, "MVP");
-    textureID = glGetUniformLocation(*shaderProgram, "textureSampler");
+    matrixID = glGetUniformLocation(*shaderProgram, "mvp");
+    viewMatrixID = glGetUniformLocation(*shaderProgram, "v");
+    modelMatrixID = glGetUniformLocation(*shaderProgram, "m");
+
+    albedoTextureID = glGetUniformLocation(*shaderProgram, "albedoSampler");
+    specularTextureID = glGetUniformLocation(*shaderProgram, "specularSampler");
+
+    lightID = glGetUniformLocation(*shaderProgram, "lightPosition_worldspace");
+    lightColor = glGetUniformLocation(*shaderProgram, "lightColor");
+    lightPower = glGetUniformLocation(*shaderProgram, "lightPower");
+  }
+};
+
+class Camera {
+public:
+  glm::vec3 position;
+  glm::quat rotation = glm::quat(1.0f, 0.0f, 0.0f, 0.0f);
+
+  float fov = glm::radians(60.0f);
+  float nearPlane = 0.1f;
+  float farPlane = 100.0f;
+
+  
+  Camera(glm::vec3 initPosition) {
+    position = initPosition;
+  }
+  Camera(glm::vec3 initPosition, glm::quat initRotation) {
+    position = initPosition;
+    rotation = initRotation;
+  }
+  Camera(glm::vec3 initPosition, glm::quat initRotation, float initFov) { 
+    position = initPosition;
+    rotation = initRotation;
+    fov = initFov;
+  }
+  Camera(glm::vec3 initPosition, glm::quat initRotation, float initFov, float initNearPlane, float initFarPlane) {
+    position = initPosition;
+    rotation = initRotation;
+    fov = initFov;
+    nearPlane = initNearPlane;
+    farPlane = initFarPlane;
+  }
+  void lookAt(glm::vec3 target) { // I think I lost it writing this
+    glm::mat4 lookAtMatrix = glm::lookAt(position, target, glm::vec3(0, 1, 0));
+    rotation = glm::conjugate(glm::quat(lookAtMatrix));
   }
 };
 
 class Scene {
 public:
   std::vector<Asset*> assets;
-  void addAsset(Asset *asset) {
-    assets.push_back(asset);
+  std::vector<Camera*> cameras;
+  void (*renderCallback)() = NULL;
+
+  int activeCamera = 0;
+
+  void addAsset(Asset &asset) {
+    assets.push_back(&asset);
+  }
+  void addCamera(Camera &camera) {
+    cameras.push_back(&camera);
+  }
+  void setRenderCallback(void (*callback)()) {
+    renderCallback = callback;
   }
 };
 
 GLFWwindow *window;
+GLuint vertexArrayID;
+float deltaTime = 0;
+float deltaTimeMultiplier = 1.0f;
+
+void setDeltaTimeMultiplier(float mult) {
+  deltaTimeMultiplier = mult;
+}
+float getDeltaTime() {
+  return deltaTime * deltaTimeMultiplier;
+}
+float getUnscaledDeltaTime() {
+  return deltaTime;
+}
 
 static bool shouldExit() {
 return glfwGetKey(window, GLFW_KEY_ESCAPE) != GLFW_PRESS && glfwWindowShouldClose(window) == 0;
 }
 
-glm::mat4 mvp; // TODO: REMOVE THIS PLLAAAHSE
-glm::mat4 viewMatrix;
-glm::mat4 projectionMatrix;
-
 static int initWindow() {
   glfwSetErrorCallback(glfwErrorCallback);
 
@@ -253,22 +330,6 @@ static int initWindow() {
   ImGui_ImplGlfw_InitForOpenGL(window, true);
   ImGui_ImplOpenGL3_Init("#version 330");
 
-
-  // I love glm
-  // Projection matrix, 45deg FOV, 4:3 Aspect Ratio, Planes: 0.1units ->
-  // 100units
-  projectionMatrix = glm::perspective(
-      glm::radians(45.0f), (float)WIDTH / (float)HEIGHT, 0.1f, 100.0f);
-
-  // Camera matrix
-  viewMatrix =
-      glm::lookAt(glm::vec3(4, 3, 3), glm::vec3(0, 0, 0), glm::vec3(0, 1, 0));
-
-  glm::mat4 model = glm::mat4(1.0f);
-
-  // Model view projection, the combination of the three vectors
-  mvp = projectionMatrix * viewMatrix * model;
-
   glEnable(GL_DEPTH_TEST); // Turn on the Z-buffer
   glDepthFunc(GL_LESS);    // Accept only the closest fragments
 
@@ -276,52 +337,58 @@ static int initWindow() {
 
   glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
 
-  GLuint vertexArrayID;
   glGenVertexArrays(1, &vertexArrayID);
   glBindVertexArray(vertexArrayID);
 
-  // Define camera stuff
-  //glm::vec3 position = {4, 3, 3};
-  //float horizontalAngle = 3.14f;
-  //float verticalAngle = -0.1f;
-  //float initialFOV = 60.0f;
-
   //float speed = 3.0f;
   //float mouseSpeed = 0.005f;
 
   //double xpos, ypos;
 
-  //glDeleteVertexArrays(1, &vertexArrayID);
-  //ImGui_ImplOpenGL3_Shutdown();
-  //ImGui_ImplGlfw_Shutdown();
-  //ImGui::DestroyContext();
-
-  //glfwDestroyWindow(window);
-  //glfwTerminate();
-
   return 0;
 }
 
-//void imguiMat4Table(glm::mat4 matrix, const char *name) {
-//  if (ImGui::BeginTable(name, 4)) {
-//    for (int i = 0; i < 4; i++) {
-//      for (int j = 0; j < 4; j++) {
-//        ImGui::TableNextColumn();
-//        ImGui::Text("%f", matrix[i][j]);
-//      }
-//    }
-//    ImGui::EndTable();
-//  }
-//}
+void destroy() {
+  glDeleteVertexArrays(1, &vertexArrayID);
+  ImGui_ImplOpenGL3_Shutdown();
+  ImGui_ImplGlfw_Shutdown();
+  ImGui::DestroyContext();
+
+  glfwDestroyWindow(window);
+  glfwTerminate();
+}
+
+/*void imguiMat4Table(glm::mat4 matrix, const char *name) {*/
+/*  if (ImGui::BeginTable(name, 4)) {*/
+/*    for (int i = 0; i < 4; i++) {*/
+/*      for (int j = 0; j < 4; j++) {*/
+/*        ImGui::TableNextColumn();*/
+/*        ImGui::Text("%f", matrix[i][j]);*/
+/*      }*/
+/*    }*/
+/*    ImGui::EndTable();*/
+/*  }*/
+/*}*/
 
 void render(Scene scene) {
   // Clear this mf
   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
+  static double lastTime = glfwGetTime();
+  double currentTime = glfwGetTime();
+  deltaTime = float(currentTime - lastTime);
+  lastTime = currentTime;
+
   ImGui_ImplOpenGL3_NewFrame();
   ImGui_ImplGlfw_NewFrame();
   ImGui::NewFrame();
 
+  Camera *currentCamera = scene.cameras[scene.activeCamera];
+
+  // Compute the V and P for the MVP
+  glm::mat4 viewMatrix = glm::inverse(glm::translate(glm::mat4(1), currentCamera->position) * (mat4_cast(currentCamera->rotation)));
+  glm::mat4 projectionMatrix = glm::perspective(currentCamera->fov, (float)WIDTH / (float)HEIGHT, currentCamera->nearPlane, currentCamera->farPlane);
+
   for (int i = 0; i < scene.assets.size(); i++) {
     Asset *currentAsset = scene.assets[i];
 
@@ -333,20 +400,38 @@ void render(Scene scene) {
     glm::mat4 scalingMatrix = glm::scale(glm::mat4(1), currentAsset->scaling);
     glm::mat4 modelMatrix = translationMatrix * rotationMatrix * scalingMatrix;
 
-    mvp = projectionMatrix * viewMatrix * modelMatrix;
+    glm::mat4 mvp = projectionMatrix * viewMatrix * modelMatrix;
 
     char assetName[] = "Asset: 00";
     sprintf(assetName, "Asset: %d", i);
     ImGui::Begin(assetName);
-    ImGui::gizmo3D(assetName, currentAsset->rotation);
+    ImGui::Text("Frametime/Deltatime (ms): %f", deltaTime * 1000);
+    glm::vec3 rotationEuler = glm::degrees(eulerAngles(currentAsset->rotation));
+    ImGui::DragFloat3("Translate", (float*)&currentAsset->position, 0.01f);
+    ImGui::DragFloat3("Rotate", (float*)&rotationEuler);
+    ImGui::DragFloat3("Scale", (float*)&currentAsset->scaling, 0.01f);
+    currentAsset->rotation = glm::quat(glm::radians(rotationEuler));
     ImGui::End();
 
     glUniformMatrix4fv(currentAsset->matrixID, 1, GL_FALSE, &mvp[0][0]);
+    glUniformMatrix4fv(currentAsset->modelMatrixID, 1, GL_FALSE, &modelMatrix[0][0]);
+    glUniformMatrix4fv(currentAsset->viewMatrixID, 1, GL_FALSE, &viewMatrix[0][0]);
+
+    glm::vec3 lightPos = glm::vec3(4, 4, 4);
+    glm::vec3 lightColor = glm::vec3(1, 1, 1);
+    float lightPower = 50;
+    glUniform3f(currentAsset->lightID, lightPos.x, lightPos.y, lightPos.z);
+    glUniform3f(currentAsset->lightColor, lightColor.x, lightColor.y, lightColor.z);
+    glUniform1f(currentAsset->lightPower, lightPower);
 
     glActiveTexture(GL_TEXTURE0);
-    glBindTexture(GL_TEXTURE_2D, *currentAsset->modelTexture);
+    glBindTexture(GL_TEXTURE_2D, *currentAsset->albedoTexture);
     // Set sampler texture
-    glUniform1i(currentAsset->textureID, 0);
+    glUniform1i(currentAsset->albedoTextureID, 0);
+
+    glActiveTexture(GL_TEXTURE1);
+    glBindTexture(GL_TEXTURE_2D, *currentAsset->specularTexture);
+    glUniform1i(currentAsset->specularTextureID, 1);
 
     // DRAWING HAPPENS HERE
     // Vertex Data
@@ -375,6 +460,10 @@ void render(Scene scene) {
     glDisableVertexAttribArray(2);
   }
 
+  if (scene.renderCallback != NULL) {
+    scene.renderCallback();
+  }
+
   ImGui::Render();
   ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
 
@@ -385,27 +474,61 @@ void render(Scene scene) {
 
 } // namespace fred
 
+// Userspace ================================================================ //
+
+fred::Scene scene;
+
+void renderCallback() {
+  ImGui::Begin("User Render Callback");
+  ImGui::Text("Frametime (ms): %f", fred::getUnscaledDeltaTime() * 1000);
+  ImGui::Text("FPS: %f", 1/fred::getUnscaledDeltaTime());
+  ImGui::SeparatorText("Camera");
+  fred::Camera *currentCamera = scene.cameras[scene.activeCamera];
+  glm::vec3 rotationEuler = glm::degrees(eulerAngles(currentCamera->rotation));
+  ImGui::DragFloat3("Translate", (float*)&currentCamera->position, 0.01f);
+  ImGui::DragFloat3("Rotate", (float*)&rotationEuler);
+  float fovDeg = glm::degrees(currentCamera->fov);
+  ImGui::DragFloat("FOV", (float*)&fovDeg);
+  currentCamera->fov = glm::radians(fovDeg);
+  currentCamera->rotation = glm::quat(glm::radians(rotationEuler));
+  ImGui::End();
+}
+
 int main() {
   fred::initWindow();
   fred::Model coneModel("../models/model.obj");
+  fred::Model suzanneMod("../models/suzanne.obj");
   fred::Texture buffBlackGuy("../textures/results/texture_BMP_DXT5_3.DDS");
-  fred::Shader basicShader("../shaders/shader.vert", "../shaders/shader.frag");
-  fred::Asset cone(coneModel, buffBlackGuy, basicShader);
-  fred::Asset coneTwo(coneModel, buffBlackGuy, basicShader);
+  fred::Texture suzanneTexAlb("../textures/results/suzanne_albedo_DXT5.DDS");
+  fred::Texture suzanneTexSpec("../textures/results/suzanne_specular_DXT5.DDS");
+  fred::Shader basicShader("../shaders/basic.vert", "../shaders/basic.frag");
+  fred::Shader basicLitShader("../shaders/basic_lit.vert", "../shaders/basic_lit.frag");
+  fred::Asset cone(coneModel, buffBlackGuy, buffBlackGuy, basicShader);
+  fred::Asset suzanne(suzanneMod, suzanneTexAlb, suzanneTexSpec, basicLitShader);
 
-  fred::Scene scene = fred::Scene();
+  fred::Camera mainCamera(glm::vec3(4, 3, 3));
+  mainCamera.lookAt(glm::vec3(0, 0, 0));
 
-  scene.addAsset(&cone);
-  scene.addAsset(&coneTwo);
+  scene = fred::Scene();
+
+  scene.addCamera(mainCamera);
+
+  scene.addAsset(cone);
+  scene.addAsset(suzanne);
+
+  scene.setRenderCallback(&renderCallback);
+
+  fred::setDeltaTimeMultiplier(20.0f);
 
   while (fred::shouldExit()) {
-  //while (1) {
     fred::render(scene);
-    cone.position.x += 0.01;
-    glm::vec3 eulerAngles = glm::eulerAngles(coneTwo.rotation);
-    eulerAngles.x += glm::radians(1.0f);
-    coneTwo.rotation = glm::quat(eulerAngles);
+    cone.position.x += 0.01 * fred::getDeltaTime();
+    glm::vec3 eulerAngles = glm::eulerAngles(suzanne.rotation);
+    eulerAngles.x += glm::radians(1.0f) * fred::getDeltaTime();
+    suzanne.rotation = glm::quat(eulerAngles);
   }
 
+  fred::destroy();
+
   return 0;
 }

src/shader.c

@@ -2,7 +2,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#include <clog/clog.h>
+#include <clog/extra.h>
 
 #include <glad/gl.h>
 #include <GLFW/glfw3.h>

textures/fred.cprj

@@ -1,41 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<PROJECT>
-    <Image File="//wsl.localhost/Fedora/home/fedora/fred/textures/texture.bmp">
-        <Compression Setting="texture_BMP_DXT3_2" Enabled="False">
-            <Source>//wsl.localhost/Fedora/home/fedora/fred/textures/texture.bmp</Source>
-            <Destination>//wsl.localhost/Fedora/home/fedora/fred/textures/results/texture_BMP_DXT3_2.DDS</Destination>
-            <fd>DXT3</fd>
-            <Quality>0.2</Quality>
-            <WeightR>0.3086</WeightR>
-            <WeightG>0.6094</WeightG>
-            <WeightB>0.082</WeightB>
-            <AlphaThreshold>0</AlphaThreshold>
-            <RefineSteps>0</RefineSteps>
-            <BlockRate>8.00</BlockRate>
-        </Compression>
-        <Compression Setting="texture_BMP_DXT5_3" Enabled="False">
-            <Source>//wsl.localhost/Fedora/home/fedora/fred/textures/texture.bmp</Source>
-            <Destination>//wsl.localhost/Fedora/home/fedora/fred/textures/results/texture_BMP_DXT5_3.DDS</Destination>
-            <fd>DXT5</fd>
-            <Quality>0.05</Quality>
-            <WeightR>0.3086</WeightR>
-            <WeightG>0.6094</WeightG>
-            <WeightB>0.082</WeightB>
-            <AlphaThreshold>0</AlphaThreshold>
-            <RefineSteps>0</RefineSteps>
-            <BlockRate>8.00</BlockRate>
-        </Compression>
-        <Compression Setting="texture_BMP_DXT1_1" Enabled="False">
-            <Source>//wsl.localhost/Fedora/home/fedora/fred/textures/texture.bmp</Source>
-            <Destination>//wsl.localhost/Fedora/home/fedora/fred/textures/results/texture_BMP_DXT1_1.DDS</Destination>
-            <fd>DXT1</fd>
-            <Quality>0.05</Quality>
-            <WeightR>0.3086</WeightR>
-            <WeightG>0.6094</WeightG>
-            <WeightB>0.082</WeightB>
-            <AlphaThreshold>0</AlphaThreshold>
-            <RefineSteps>0</RefineSteps>
-            <BlockRate>8.00</BlockRate>
-        </Compression>
-    </Image>
-</PROJECT>