fix phong lighting

8 files changed, 160 insertions, 306 deletions

diff --git a/.DS_Store b/.DS_Store
index 03e9cdb..b746bb5 100644
--- a/.DS_Store
+++ b/.DS_Store
diff --git a/cmake-build-release/.ninja_deps b/cmake-build-release/.ninja_deps
index 1dd70c6..c77f947 100644
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index 0536d40..183942e 100644
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-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/accelerate/bvh.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/accelerate/bvh.h
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/vec4ops/vec4ops.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/accelerate/myqthreads.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/utils/scenefilereader.h
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/vec4ops/vec4ops.h
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/camera/camera.h
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/aliasing/supersample.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/camera/camera.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/mainwindow.h
+/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/raytracer/raytracescene.h
+/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/raytracer/raytracer.h
  mmc:Q_OBJECT
- mdp:/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/mainwindow.h
+ mdp:/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/raytracer/raytracer.h
  mdp:/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/cmake-build-release/projects_ray_autogen/moc_predefs.h
  mdp:/Library/Developer/CommandLineTools/SDKs/MacOSX13.1.sdk/usr/include/Availability.h
  mdp:/Library/Developer/CommandLineTools/SDKs/MacOSX13.1.sdk/usr/include/AvailabilityInternal.h
@@ -1531,7 +1571,6 @@
  mdp:/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/camera/camera.h
  mdp:/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/raytracer/raytracer.h
  mdp:/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/raytracer/raytracescene.h
- mdp:/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/utils/aspectratiowidget/aspectratiowidget.hpp
  mdp:/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/utils/rgba.h
  mdp:/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/utils/scenedata.h
  mdp:/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/utils/sceneparser.h
@@ -1582,7 +1621,6 @@
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtCore.framework/Versions/A/Headers/qiterator.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtCore.framework/Versions/A/Headers/qline.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtCore.framework/Versions/A/Headers/qlist.h
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtCore.framework/Versions/A/Headers/qlocale.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtCore.framework/Versions/A/Headers/qlogging.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtCore.framework/Versions/A/Headers/qmalloc.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtCore.framework/Versions/A/Headers/qmap.h
@@ -1603,7 +1641,6 @@
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtCore.framework/Versions/A/Headers/qprocessordetection.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtCore.framework/Versions/A/Headers/qrect.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtCore.framework/Versions/A/Headers/qrefcount.h
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtCore.framework/Versions/A/Headers/qregularexpression.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtCore.framework/Versions/A/Headers/qscopedpointer.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtCore.framework/Versions/A/Headers/qscopeguard.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtCore.framework/Versions/A/Headers/qset.h
@@ -1676,57 +1713,20 @@
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtGui.framework/Versions/A/Headers/qtguiexports.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtGui.framework/Versions/A/Headers/qtguiglobal.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtGui.framework/Versions/A/Headers/qtransform.h
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtGui.framework/Versions/A/Headers/qvalidator.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtGui.framework/Versions/A/Headers/qwindowdefs.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtOpenGLWidgets.framework/Versions/A/Headers/QOpenGLWidget
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtOpenGLWidgets.framework/Versions/A/Headers/qopenglwidget.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtOpenGLWidgets.framework/Versions/A/Headers/qtopenglwidgetsexports.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtOpenGLWidgets.framework/Versions/A/Headers/qtopenglwidgetsglobal.h
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/QBoxLayout
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/QCheckBox
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/QDoubleSpinBox
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/QLabel
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/QMainWindow
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/QPushButton
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/QSlider
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/QSpinBox
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/QWidget
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/qabstractbutton.h
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/qabstractslider.h
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/qabstractspinbox.h
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/qboxlayout.h
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/qcheckbox.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/qframe.h
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/qgridlayout.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/qlabel.h
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/qlayout.h
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/qlayoutitem.h
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/qmainwindow.h
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/qpushbutton.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/qsizepolicy.h
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/qslider.h
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/qspinbox.h
- mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/qtabwidget.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/qtwidgets-config.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/qtwidgetsexports.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/qtwidgetsglobal.h
  mdp:/Users/sotech117/Qt/6.5.2/macos/lib/QtWidgets.framework/Versions/A/Headers/qwidget.h
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/illuminate/illuminate.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/main.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/intersect/intersect.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/illuminate/reflect.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/raytracer/raytracescene.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/mainwindow.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/settings.h
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/illuminate/shadow.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/utils/sceneparser.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/settings.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/accelerate/kdtree.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/raytracer/raytracer.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/utils/raytracerutils.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/texture/texture.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/intersect/normals.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/vec4ops/transform4d.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/vec4ops/rotations4d.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/aliasing/filter.cpp
-/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/utils/scenefilereader.cpp
+/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/accelerate/kdtree.h
+/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/utils/rgba.h
+/Users/sotech117/Documents/master/graphics/the-all-americans-in-cs1230/src/accelerate/myqtconcurrent.cpp
diff --git a/cmake-build-release/Testing/Temporary/LastTest.log b/cmake-build-release/Testing/Temporary/LastTest.log
index 6b7e648..a362618 100644
--- a/cmake-build-release/Testing/Temporary/LastTest.log
+++ b/cmake-build-release/Testing/Temporary/LastTest.log
@@ -1,3 +1,3 @@
-Start testing: Dec 13 01:35 EST
+Start testing: Dec 13 01:58 EST
 ----------------------------------------------------------
-End testing: Dec 13 01:35 EST
+End testing: Dec 13 01:58 EST
diff --git a/cmake-build-release/projects_ray b/cmake-build-release/projects_ray
index bbcd585..6df9ecc 100755
--- a/cmake-build-release/projects_ray
+++ b/cmake-build-release/projects_ray
diff --git a/scenefiles-4d/unit_sphere.json b/scenefiles-4d/unit_sphere.json
index 5099526..0c5901f 100644
--- a/scenefiles-4d/unit_sphere.json
+++ b/scenefiles-4d/unit_sphere.json
@@ -21,7 +21,7 @@
         {
           "type": "directional",
           "color": [1.0, 1.0, 1.0],
-          "direction": [-3.0, -2.0, -1.0, -2.0]
+          "direction": [0.0, -1.0, 0.0, 0.0]
         }
       ]
     },
diff --git a/src/illuminate/illuminate.cpp b/src/illuminate/illuminate.cpp
index 39ecccb..641f06d 100644
--- a/src/illuminate/illuminate.cpp
+++ b/src/illuminate/illuminate.cpp
@@ -1,50 +1,7 @@
 #include <iostream>
 #include "raytracer/raytracer.h"
 
-glm::vec4  RayTracer::illuminationFromPointLight(
-        const SceneLightData &light,
-        glm::vec4 intersectionWorld,
-        glm::vec4 normalWorld,
-        glm::vec4  directionToCamera,
-        const RenderShapeData &shape,
-        const RayTraceScene &scene
-        )
-{
-    auto directionFromIntersectionToLight = light.pos - intersectionWorld;
-    directionFromIntersectionToLight = glm::normalize(directionFromIntersectionToLight);
-
-    // check if this light is blocked by an object
-    auto distanceToLight = glm::distance(light.pos, intersectionWorld);
-    bool isShadow = RayTracer::isShadowed(
-            light.pos,
-            distanceToLight,
-            glm::vec4(directionFromIntersectionToLight),
-            glm::vec4(intersectionWorld),
-            scene);
-    if (isShadow)
-    {
-        // if this is a shadow, then no light contribution
-        return glm::vec4(0.f);
-    }
-
-    // calculate attenuation
-    float c1 = light.function.x;
-    float c2 = light.function.y;
-    float c3 = light.function.z;
-    float attenuation = std::min(1.f, 1.f / (c1 + distanceToLight * c2 + (distanceToLight * distanceToLight) * c3));
-
-    return phong(
-            light.color,
-            attenuation,
-            directionFromIntersectionToLight,
-            directionToCamera,
-            intersectionWorld,
-            normalWorld,
-            shape,
-            scene);
-}
-
-glm::vec4  RayTracer::illuminationFromSpotLight(
+glm::vec4  RayTracer::illuminationFromDirectionalLight(
         const SceneLightData &light,
         glm::vec4 intersectionWorld,
         glm::vec4 normalWorld,
@@ -53,108 +10,42 @@ glm::vec4  RayTracer::illuminationFromSpotLight(
         const RayTraceScene &scene
 )
 {
-    auto distance = glm::distance(light.pos, intersectionWorld);
+    // define direction and distance of directional light
+    auto directionFromIntersectionToLight = - light.dir;
+    directionFromIntersectionToLight = glm::normalize(directionFromIntersectionToLight);
+    float distanceToLight = FINF;   // directional light infinitely far away
 
-    // calculate the angle from the shape to the spot light
-    auto directionFromIntersectionToLight = glm::normalize(light.pos - intersectionWorld);
+    float kd = scene.getGlobalData().kd;
+    float ks = scene.getGlobalData().ks;
+    auto material = shape.primitive.material;
 
-    // calculate intensity, based on angle. apply falloff if necessary
-    auto lightDirection = glm::normalize(light.dir);
-    // invert the direction of the intersection to light for dot product to work correctly
-    auto cosTheta = glm::dot(-directionFromIntersectionToLight, lightDirection);
-    auto theta = glm::acos(cosTheta);
+    glm::vec4 illumination(0, 0, 0, 1.f);
 
-    // determine intensity, based on location on spot cone
-    glm::vec4 intensity;
-    float inner = light.angle - light.penumbra;
-    if (theta <= inner)
-    {
-        intensity = light.color;
-    }
-    else if
-    (
-        theta > inner
-        && theta <= light.angle
-    )
-    {
-        // inside the penumbra, need to apply falloff
-        float falloff = -2 * std::pow(theta - inner, 3) / std::pow(light.penumbra, 3) +
-                        3 * std::pow(theta - inner, 2) / std::pow(light.penumbra, 2);
-        intensity = light.color * (1 - falloff);
-    }
-    else // theta > light.angle
-    {
-        return glm::vec4(0.f);
+    // calculate diffuse term
+    auto dotDiffuse = glm::dot(normalWorld, directionFromIntersectionToLight);
+    if (dotDiffuse < 0) {
+        return illumination;
     }
+    // add the diffuse
+    auto diffuse = (kd * material.cDiffuse);
+    illumination += light.color * dotDiffuse * diffuse;
 
-    // if the light is within the cone, see if it's a shadow
-    auto distanceToLight = glm::distance(light.pos, intersectionWorld);
-    bool isShadow = RayTracer::isShadowed(
-            light.pos,
-            distanceToLight,
-            glm::vec4(directionFromIntersectionToLight),
-            glm::vec4(intersectionWorld),
-            scene);
-    if (isShadow)
-    {
-        // if this is a shadow, then no light contribution
-        return glm::vec4(0.f);
+    // if the obj has no specular, return
+    if (material.cSpecular == glm::vec4(0.f)) {
+        return illumination;
     }
 
-    // calculate attenuation
-    float c1 = light.function.x;
-    float c2 = light.function.y;
-    float c3 = light.function.z;
-    float attenuation = std::min(1.f, 1.f / (c1 + distance * c2 + (distance * distance) * c3));
+    // get the light reflection vector
+    auto reflectedDirOverNormal = glm::normalize(glm::reflect(directionFromIntersectionToLight, normalWorld));
 
-    return phong(
-            intensity,
-            attenuation,
-            directionFromIntersectionToLight,
-            directionToCamera,
-            intersectionWorld,
-            normalWorld,
-            shape,
-            scene);
-}
-
-glm::vec4  RayTracer::illuminationFromDirectionalLight(
-        const SceneLightData &light,
-        glm::vec4 intersectionWorld,
-        glm::vec4 normalWorld,
-        glm::vec4 directionToCamera,
-        const RenderShapeData &shape,
-        const RayTraceScene &scene
-)
-{
-    // define direction and distance of directional light
-    auto directionFromIntersectionToLight = - light.dir;
-    directionFromIntersectionToLight = glm::normalize(directionFromIntersectionToLight);
-    float distanceToLight = FINF;   // directional light infinitely far away
-
-    // check if an object blocks ours
-    bool isShadow = RayTracer::isShadowed(
-            light.pos,
-            distanceToLight,
-            directionFromIntersectionToLight,
-            glm::vec4(intersectionWorld),
-            scene);
-    if (isShadow)
-    {
-        // if this is a shadow, then no light contribution
-        return glm::vec4(0.f);
+    // calculate specular term
+    auto dotSpecular = glm::dot(reflectedDirOverNormal, -directionToCamera);
+    if (dotSpecular > 0) {
+        auto toPow = std::pow(dotSpecular, material.shininess);
+        illumination += light.color * toPow * (ks * material.cSpecular);
     }
 
-    float attenuation = 1.f; // directional lights don't attenuate
-    return phong(
-            light.color,
-            attenuation,
-            directionFromIntersectionToLight,
-            directionToCamera,
-            intersectionWorld,
-            normalWorld,
-            shape,
-            scene);
+    return illumination;
 }
 
 
@@ -182,125 +73,24 @@ glm::vec4 RayTracer::illuminatePixel(
     for (const SceneLightData &light : scene.getLights()) {
         switch (light.type) {
             case LightType::LIGHT_POINT:
-                illumination +=
-                        illuminationFromPointLight(light, intersectionWorld, normalWorld, directionToCamera, shape, scene);
                 continue;
             case LightType::LIGHT_DIRECTIONAL:
                 illumination +=
                         illuminationFromDirectionalLight(light, intersectionWorld, normalWorld, directionToCamera, shape, scene);
                 continue;
             case LightType::LIGHT_SPOT:
-                illumination +=
-                        illuminationFromSpotLight(light, intersectionWorld, normalWorld, directionToCamera, shape, scene);
                 continue;
             case LightType::LIGHT_AREA:
-                illumination +=
-                        illuminationFromAreaLight(light, intersectionWorld, normalWorld, directionToCamera, shape, scene);
                 continue;
             default:
                 continue;
         }
     }
 
-    auto incidentDir = -directionToCamera;
+    // auto incidentDir = -directionToCamera;
     // recursive raytracing for the reflection and refraction (see reflect.cpp)
-    illumination += refract(intersectionWorld, normalWorld, incidentDir, shape, scene, depth + 1);
-    illumination += reflect(intersectionWorld, normalWorld, incidentDir, shape, scene, depth + 1);
+    // illumination += refract(intersectionWorld, normalWorld, incidentDir, shape, scene, depth + 1);
+    // illumination += reflect(intersectionWorld, normalWorld, incidentDir, shape, scene, depth + 1);
 
     return illumination;
-}
-
-// helper function to handle the diffuse and specular terms
-// also handles the texture within that diffuse term
-glm::vec4 RayTracer::phong(
-        glm::vec4 lightColor,
-        float attenuation,
-        glm::vec4 directionFromIntersectionToLight,
-        glm::vec4 directionToCamera,
-        glm::vec4 intersectionWorld,
-        glm::vec4 normalWorld,
-        const RenderShapeData &shape,
-        const RayTraceScene &scene)
-{
-    float kd = scene.getGlobalData().kd;
-    float ks = scene.getGlobalData().ks;
-    auto material = shape.primitive.material;
-
-    glm::vec4 illumination(0.f);
-
-    // calculate diffuse term
-    auto dotDiffuse = glm::dot(normalWorld, directionFromIntersectionToLight);
-    if (dotDiffuse > 0) // ensure not facing away
-    {
-        auto diffuse = (kd * material.cDiffuse);
-        // commenting out texture stuff bc 4d textures??????
-//        if (material.textureMap.isUsed)
-//        {
-//            glm::vec4 pObject = shape.inverseCTM * glm::vec4(intersectionWorld, 1.f);
-//            diffuse = interpolateTexture(pObject, shape, diffuse);
-//        }
-        illumination += (attenuation * lightColor) * dotDiffuse * diffuse;
-    }
-
-    // add specular term
-    auto reflectedDirOverNormal =
-            2 * glm::dot(directionFromIntersectionToLight, normalWorld) * normalWorld -
-            directionFromIntersectionToLight;
-    auto dotSpecular = glm::dot(reflectedDirOverNormal, directionToCamera);
-    auto toPow = std::pow(dotSpecular, material.shininess);
-    if (dotSpecular > 0) {
-        illumination += (attenuation * lightColor) * toPow * (ks * material.cSpecular);
-    }
-
-    return illumination;
-}
-
-// EXTRA CREDIT -> AREA LIGHT
-glm::vec4  RayTracer::illuminationFromAreaLight(
-        const SceneLightData &light,
-        glm::vec4 intersectionWorld,
-        glm::vec4 normalWorld,
-        glm::vec4  directionToCamera,
-        const RenderShapeData &shape,
-        const RayTraceScene &scene
-) {
-    // select a random point within the light's height and width
-    float width = light.width;
-    float height = light.height;
-    float x = ((float) rand() / (float) RAND_MAX) * width - width / 2.f;
-    float y = ((float) rand() / (float) RAND_MAX) * height - height / 2.f;
-    glm::vec4 lightPosition = light.pos + glm::vec4(x, y, 0.f, 0.f);
-
-    auto directionFromIntersectionToLight = lightPosition - intersectionWorld;
-    directionFromIntersectionToLight = glm::normalize(directionFromIntersectionToLight);
-
-    // check if this light is blocked by an object
-    auto distanceToLight = glm::distance(lightPosition, intersectionWorld);
-    bool isShadow = RayTracer::isShadowed(
-            lightPosition,
-            distanceToLight,
-            glm::vec4(directionFromIntersectionToLight),
-            glm::vec4(intersectionWorld),
-            scene);
-    if (isShadow)
-    {
-        // if this is a shadow, then show a ray to a random point in the light
-        return glm::vec4(0.f);
-    }
-
-    // calculate attenuation
-    float c1 = light.function.x;
-    float c2 = light.function.y;
-    float c3 = light.function.z;
-    float attenuation = std::min(1.f, 1.f / (c1 + distanceToLight * c2 + (distanceToLight * distanceToLight) * c3));
-
-    return phong(
-            light.color,
-            attenuation,
-            directionFromIntersectionToLight,
-            directionToCamera,
-            intersectionWorld,
-            normalWorld,
-            shape,
-            scene);
-}
+}
\ No newline at end of file