Merge branch 'obs-animation' of https://github.com/StartAutomating/obs-powershell into obs-animation

Author: James Brundage

obs-powershell.types.ps1xml

@@ -4,6 +4,108 @@
   <Type>
     <Name>OBS.GetSceneItemList.Response</Name>
     <Members>
+      <ScriptMethod>
+        <Name>Animate</Name>
+        <Script>
+                        param(
+# The set of values that you're animating from.
+# Aka, the starting positions of the animation.
+# Can be either a dictionary or an object.
+# These take the values found in Set-OBSSceneItemTransform
+$From,
+
+# The set of values that you're animating to.
+# Aka, the ending positions of the animation.
+# Can be either a dictionary or an object.
+# These take the values found in Set-OBSSceneItemTransform
+$To,
+
+# The timespan the animation will take.
+[TimeSpan]
+$TimeSpan = [timespan]::fromSeconds(1),
+
+# The number of steps in the animation.
+[int]
+$StepCount
+)
+
+# If there's no step count
+if (-not $StepCount) {
+    $StepCount = [Math]::Ceiling($TimeSpan.TotalMilliseconds / ([timespan]::fromSeconds(1/30).TotalMilliseconds)) * 2
+}
+
+# Convert -From to a dictionary
+$realFrom = 
+    if ($from -is [Collections.IDictionary]) {
+        [Ordered]@{} + $from
+    } else {
+        $newFrom = [Ordered]@{}
+        foreach ($property in $from.psobject.properties) {
+            $newFrom[$property.Name] = $property.Value
+        }
+        $newFrom
+    }
+    
+# Convert -To to a dictionary
+$realTo =
+    if ($to -is [Collections.IDictionary]) {
+        [Ordered]@{} + $to
+    } else {
+        $newTo = [Ordered]@{}
+        foreach ($property in $to.psobject.properties) {
+            $newTo[$property.Name] = $property.Value
+        }
+        $newTo
+    }
+
+# Compare the two sets of keys to determine the base data object
+$BaseObject = [Ordered]@{}
+foreach ($key in $realTo.Keys) {
+    if (-not $BaseObject[$key]) {
+        $BaseObject[$key] = 
+            if ($realFrom[$key]) {
+                $realFrom[$key]
+            } else {
+                $realTo[$key]
+            }
+    }
+}
+
+# Check for properties only defined in -From
+foreach ($key in $realFrom.Keys) {
+    if (-not $BaseObject[$key]) {
+        $BaseObject[$key] = $realFrom[$key]
+        $realTo[$key]     = $realFrom[$key]
+    }
+}
+
+# Determine the animation change per step.
+$eachStepValue = [Ordered]@{}
+foreach ($key in $baseObject.Keys) {
+    $distance = try { $realTo[$key] - $baseObject[$key] } catch { $null }
+    if ($null -ne $distance) {
+        $eachStepValue[$key] = [float]$distance / $StepCount
+    }
+}
+
+
+# Get all of the steps
+$allSteps = 
+    foreach ($stepNumber in 0..($stepCount - 1)) {
+        $stepObject = [Ordered]@{}
+        foreach ($key in $BaseObject.Keys) {
+            $stepObject[$key] = $BaseObject[$key] + ($eachStepValue[$key] * $stepNumber)
+        }
+        $this | Set-OBSSceneItemTransform -SceneItemTransform $stepObject -PassThru
+    }
+
+# Determine the time to wait per step.
+$stepTime = [TimeSpan]::FromMilliseconds($TimeSpan.TotalMilliseconds / $StepCount)
+
+# Send all of the steps to OBS.
+$allSteps | Send-OBS -StepTime $stepTime
+                    </Script>
+      </ScriptMethod>
       <ScriptMethod>
         <Name>Blend</Name>
         <Script>