Solve small vertical FOV issue

Author: Nelarius

src/common/camera.cpp

@@ -11,7 +11,7 @@ Camera createCamera(
     const float     aspectRatio)
 {
     const float theta = vfov.as_radians();
-    const float halfHeight = glm::tan(0.5f * theta);
+    const float halfHeight = focusDistance * glm::tan(0.5f * theta);
     const float halfWidth = aspectRatio * halfHeight;
 
     const glm::vec3 w = glm::normalize(lookAt - origin);

src/pt/fly_camera_controller.cpp

@@ -121,7 +121,7 @@ glm::vec3 FlyCameraController::generateCameraRayDir(
     const MousePos&    pos) const
 {
     const float aspect = aspectRatio(mWindowSize);
-    const float halfHeight = std::tan(0.5f * mVfov.as_radians());
+    const float halfHeight = mFocusDistance * std::tan(0.5f * mVfov.as_radians());
     const float halfWidth = aspect * halfHeight;
 
     // UV coordinates in [0, 1] range with (0, 0) in the top-left corner.

src/pt/main.cpp

@@ -54,7 +54,7 @@ int main()
 
         {
             pt::Extent2i curFramebufferSize = window.resolution();
-            float        vfovDegrees = 80.0f;
+            float        vfovDegrees = 70.0f;
             while (!glfwWindowShouldClose(window.ptr()))
             {
                 glfwPollEvents();