EyeMaterial Test fixes (#653)

* Updated the screen shot and the EyeMaterialTest
according to the output produced by the improved
Eye shader.

Added helper Lua script: scripts/EyeMaterialRotate.bv.lua,
which was used to record before and after video of the rendered
Eye at different angles.

---------

Signed-off-by: galibzon <[email protected]>

Gem/Code/Source/EyeMaterialExampleComponent.cpp

@@ -21,7 +21,7 @@ namespace AtomSampleViewer
 {
     static const char* MeshPath = "objects/eye.fbx.azmodel";
     static const char* MaterialPath = "materials/eye/001_EyeBasic.azmaterial";
-    static const float DefaultCameraHeading = 40.0f;
+    static const float DefaultCameraHeadingDegrees = 129.6f;
     static const float DefaultCameraDistance = 2.0f;
     
     static const char* IrisColorName = "iris.baseColor.color";
@@ -104,7 +104,9 @@ namespace AtomSampleViewer
             &AZ::Debug::CameraControllerRequestBus::Events::Enable,
             azrtti_typeid<AZ::Debug::ArcBallControllerComponent>());
         AZ::Debug::ArcBallControllerRequestBus::Event(GetCameraEntityId(), &AZ::Debug::ArcBallControllerRequestBus::Events::SetDistance, DefaultCameraDistance);
-        AZ::Debug::ArcBallControllerRequestBus::Event(GetCameraEntityId(), &AZ::Debug::ArcBallControllerRequestBus::Events::SetHeading, DefaultCameraHeading);
+        const float headingRadians = AZ::DegToRad(DefaultCameraHeadingDegrees);
+        AZ::Debug::ArcBallControllerRequestBus::Event(
+            GetCameraEntityId(), &AZ::Debug::ArcBallControllerRequestBus::Events::SetHeading, headingRadians);
 
         // Lighting
         m_defaultIbl.Init(m_scene);

Materials/Eye/001_EyeBasic.material

@@ -2,8 +2,9 @@
     "materialType": "Materials/Types/Eye.materialtype",
     "materialTypeVersion": 1,
     "propertyValues": {
-        "eye.innerEyeIOR": 1.2000000476837158,
-        "eye.irisDepth": 0.46000000834465027,
+        "eye.innerEyeIOR": 1.336,
+        "eye.irisDepth": 0.403,
+		"eye.irisRadius": 0.2,
         "iris.baseColor.color": [
             0.503395140171051,
             0.7551079392433167,

scripts/ExpectedScreenshots/EyeMaterial/screenshot_eye.png

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:8ab3b38f10ff32f15922587b904304838d731ab3baac28053e3b7c5e778c3d74
-size 396409
+oid sha256:52c1d18bb74eb733a34b847d4aa177923dd50214651804ed407fbb67c740cba2
+size 381237

scripts/EyeMaterialRotate.bv.lua

@@ -0,0 +1,44 @@
+----------------------------------------------------------------------------------------------------
+--
+-- Copyright (c) Contributors to the Open 3D Engine Project.
+-- For complete copyright and license terms please see the LICENSE at the root of this distribution.
+--
+-- SPDX-License-Identifier: Apache-2.0 OR MIT
+--
+--
+--
+----------------------------------------------------------------------------------------------------
+
+--[[
+    This is not a formal automation test. Instead, it is a helper/utility
+    script that can be used to automatically change the Heading angle of the
+    ArcBall camera, and being able to appreciate the Eye mesh being
+    rendered with the Eye material from different angles.
+
+    In particular, it was used to capture videos of the original Eye shader vs
+    the updated version.
+]]
+
+-- Animates the Heading angle of the ArcBall camera starting from @startHeadingDegrees
+-- until it reaches @stopHeadingDegrees in @numSteps. At each step (delta angle) it waits
+-- @waitTimePerStepSeconds seconds before changing to the next angle.
+function MyAnimateCamera(startHeadingDegrees, stopHeadingDegrees, numSteps, waitTimePerStepSeconds)
+    local headingDegrees = startHeadingDegrees
+    local deltaDegrees = (stopHeadingDegrees - startHeadingDegrees) / numSteps
+    local stepCount = numSteps+1
+    for step=1, stepCount  do
+        ArcBallCameraController_SetHeading(DegToRad(headingDegrees));
+        IdleSeconds(waitTimePerStepSeconds);
+        headingDegrees = headingDegrees + deltaDegrees
+    end
+end
+
+OpenSample('Features/EyeMaterial')
+-- in 18 steps of 10 degrees each, rotate the camera
+-- from 90 degrees  to 270 degrees. at each step it will wait
+-- 1 second.
+MyAnimateCamera(90.0, 270.0, 18, 1.0)
+
+-- Here are two examples of leaving the camera at a particular angle.
+-- MyAnimateCamera(129.6, 129.6, 1, 1.0)
+-- MyAnimateCamera(90.0, 90.0, 1, 1.0)