Add an Orthogonal Projection option to the Camera Gem (#2414)

* Add an Orthogonal Projection option to the Camera Gem

This adds a check-box to opt into an ortho projection along with a half-width parameter to adjust the size of the visible area. Includes some light tweaks to ensure debug rendering looks OK and that we generate a correct camera state for these non-perspective views.

Known issue: while in "Be this camera" mode in the Editor using an ortho projection manipulators aren't working correctly. This appears to be a downstream issue with CameraState consumers not actually checking the ortho flag.

Signed-off-by: nvsickle <nvsickle@amazon.com>

* Fix some typos

Signed-off-by: nvsickle <nvsickle@amazon.com>

* Account for reversed depth buffer

Signed-off-by: nvsickle <nvsickle@amazon.com>

* Clarify depth reversal for MakeOrthographicMatrixRH

Signed-off-by: nvsickle <nvsickle@amazon.com>

Gems/Atom/Component/DebugCamera/Code/Source/CameraComponent.cpp

@@ -185,6 +185,15 @@ namespace AZ
             return m_componentConfig.m_depthFar * tanf(m_componentConfig.m_fovY / 2) * 2;
         }
 
+        bool CameraComponent::IsOrthographic()
+        {
+            return false;
+        }
+
+        float CameraComponent::GetOrthographicHalfWidth()
+        {
+            return 0.0f;
+        }
 
         void CameraComponent::SetFovDegrees(float fov)
         {
@@ -226,6 +235,16 @@ namespace AZ
             UpdateViewToClipMatrix();
         }
 
+        void CameraComponent::SetOrthographic(bool orthographic)
+        {
+            AZ_Assert(!orthographic, "DebugCamera does not support orthographic projection");
+        }
+
+        void CameraComponent::SetOrthographicHalfWidth([[maybe_unused]] float halfWidth)
+        {
+            AZ_Assert(false, "DebugCamera does not support orthographic projection");
+        }
+
         void CameraComponent::MakeActiveView() 
         {
             // do nothing