Starting day 19, blending.

19-blending/src/scene.cpp

@@ -0,0 +1,68 @@
+#include "scene.hpp"
+#include "dbc.hpp"
+#include <math.h>
+
+void Scene::update() {
+  float currentFrame = glfwGetTime();
+  deltaTime = currentFrame - lastFrame;
+  lastFrame = currentFrame;
+
+  camera.update(deltaTime);
+}
+
+void Scene::draw_model(Shader& with_shader, Model& scene_model, Material& material, glm::vec3& position, float scale)
+{
+  with_shader.apply_material(material);
+
+  glm::mat4 model = glm::mat4(1.0f);
+  model = glm::translate(model, position);
+  model = glm::scale(model, glm::vec3(scale, scale, scale));
+
+  with_shader.setMat4("model", model);
+
+  scene_model.draw(with_shader);
+}
+
+void Scene::render(GLFWwindow* window) {
+  glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
+  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+  glm::mat4 view = camera.look_at();
+  glm::mat4 projection = glm::mat4(1.0f);
+
+  // fov, aspect, near plane, far plane
+  projection = glm::perspective(glm::radians(camera.fov), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
+
+  shader.use();
+  shader.setMat4("view", view);
+  shader.setMat4("projection", projection);
+
+  // for now just detect the camera moved and do spotlight update
+  if(camera.dirty) {
+    light.camera.position = camera.position;
+    light.camera.direction = camera.front;
+    // just update the camera's light
+    shader.apply_spot_light(light.camera, 0);
+    camera.dirty = false;
+  }
+
+  for(auto& thing : things) {
+    draw_model(shader, thing.model, thing.material, thing.position);
+  }
+}
+
+void Scene::cleanup() {
+  shader.cleanup();
+}
+
+void Scene::spawn(const std::string& name, components::Position& position) {
+  if(models.contains(name)) {
+    things.emplace_back(
+        name,
+        models.at(name),
+        position,
+        materials.at("default"));
+  } else {
+    dbc::log($F("No model named: {}", name));
+  }
+}