adding ambient lighting

src/main.cpp

@@ -10,8 +10,8 @@ int main()
     Window window(1920, 1080);
     scene.startRender(
         Camera{
-            .position = glm::vec3(3, 3, 3),
+            .position = glm::vec3(-2, 5, 5),
-            .direction = glm::vec3(-1, -1, -1),
+            .target = glm::vec3(0, 0, 0),
         },
         RenderParameter{
             .width = 1920,
@@ -26,7 +26,7 @@ int main()
           scene.startRender(
               Camera{
                   .position = glm::vec3(5, 5, 5),
-                  .direction = glm::vec3(-1, -1, -1),
+                  .target = glm::vec3(0, 0, 0),
               },
               RenderParameter{
                   .width = 1920,

src/scene/Renderer.cpp

@@ -7,7 +7,7 @@
 Renderer::Renderer()
 {
   bvh.addDirectionalLight(DirectionalLight{
-      .direction = glm::normalize(glm::vec3(-0.2f, -0.2f, -0.2f)),
+      .direction = glm::normalize(glm::vec3(-0.4f, -0.3f, -0.2f)),
       .color = glm::vec3(1, 1, 1),
   });
   bvh.addModels(ModelLoader::loadModel("../res/models/cube.fbx"),
@@ -18,7 +18,6 @@ Renderer::Renderer()
 
 Renderer::~Renderer() {}
 
-static bool firstTime = true;
 void Renderer::startRender(Camera cam, RenderParameter params)
 {
   threadPool.cancel();
@@ -58,7 +57,7 @@ void Renderer::render(Camera camera, RenderParameter params)
             // #pragma omp parallel for
             for (int h = 0; h < params.height; ++h)
             {
-              Ray cam = Ray(camera.position, glm::normalize(camera.direction));
+              Ray cam = Ray(camera.position, glm::normalize(camera.target - camera.position));
               glm::vec3 cx =
                             glm::normalize(glm::cross(cam.direction, abs(cam.direction.y) < 0.9 ? glm::vec3(0, 1, 0) : glm::vec3(0, 0, 1))),
                         cy = glm::cross(cx, cam.direction);
@@ -77,7 +76,6 @@ void Renderer::render(Camera camera, RenderParameter params)
                    0.5f) *
                   sdim;
               glm::vec3 spos = cam.origin + cx * s.x + cy * s.y, lc = cam.origin + cam.direction * 0.035f; // sample on 3d sensor plane
-              glm::vec3 accrad = glm::vec3(0), accmat = glm::vec3(1); // initialize accumulated radiance and bxdf
               Ray r = Ray(lc, normalize(lc - spos));                  // construct ray
 
               //-- setup lens

src/scene/Scene.cpp

@@ -280,7 +280,7 @@ IntersectionInfo Scene::intersectModel(const ModelReference& reference, const Ra
             },
         .brdf =
             {
-                .albedo = glm::vec3(texCoords, 0.0f),
+                .albedo = glm::vec3(0, 1, 0.0f),
                 .emissive = glm::vec3(0.0f, 0.0f, 0.0f),
             },
     };

src/util/BRDF.cpp

@@ -9,6 +9,6 @@ glm::vec3 BRDF::evaluate(HitInfo hit, glm::vec3 viewDir, glm::vec3 lightDir, glm
   glm::vec3 h = glm::normalize(lightDir + viewDir);
   float specular = pow(std::min(std::max(glm::dot(normal, h), 0.0f), 1.0f), shininess);
 
-  return (albedo * diffuse * lightColor);
+  return (albedo * diffuse * lightColor) + glm::vec3(0.03, 0.03, 0.03);
   //+(specularColor * specular);
 }

src/util/Camera.h

@@ -4,7 +4,7 @@
 struct Camera
 {
     glm::vec3 position;
-    glm::vec3 direction;
+    glm::vec3 target;
     glm::vec2 sensorSize = glm::vec2(0.036, 0.024);
     float S_O = 6.9;
     float f = 0.7;