improved blinking animations: much smoother now

Source/CharacterPlugin/Private/VHSaccades.cpp

@@ -45,7 +45,8 @@ void UVHSaccades::TickComponent(float DeltaTime, ELevelTick TickType, FActorComp
 		lastBlink++;
 		float FPS = 1.0/DeltaTime;
 		float sampling_ratio = FPS/30*0.05;
-		float timeLastBlink = lastBlink/FPS;
+		// float timeLastBlink = lastBlink/FPS;
+		timeLastBlink += DeltaTime;
 		float prob_change = StateNoChangeProb(timeInState*sampling_ratio,IsGazeAway);
 		float rand_prob = FMath::RandRange(0,100);
 
@@ -64,43 +65,47 @@ void UVHSaccades::TickComponent(float DeltaTime, ELevelTick TickType, FActorComp
 		{
 			if(nextBlink==0)
 			{
-				std::normal_distribution<float> gBlink(intervalBlink, intervalBlinkStD);
+				UE_LOG(LogTemp, Display, TEXT("[Blinking]: Generate 1st blink timestamp"));
+				std::normal_distribution<float> gBlink(1.5, 0.4);
 				nextBlink = gBlink(gen);
 			}
-
+			// UE_LOG(LogTemp, Display, TEXT("[Blinking]: last blink: %f		next blink: %f"), timeLastBlink,nextBlink);
 			if(timeLastBlink>nextBlink)
 			{
 				// do blinking;
 				BlinkAnimationTimer++;
-				UE_LOG(LogTemp, Display, TEXT("[Blinking]: Start blinking"));
-				UE_LOG(LogTemp, Display, TEXT("[Blinking]: Current blendshape value %f"), cur_value);
-				UE_LOG(LogTemp, Display, TEXT("[Blinking]: BlinkAnimationTimerValue %i"), BlinkAnimationTimer);
+				// UE_LOG(LogTemp, Display, TEXT("[Blinking]: Start blinking"));
+				// UE_LOG(LogTemp, Display, TEXT("[Blinking]: Current blendshape value %f"), cur_value);
+				// UE_LOG(LogTemp, Display, TEXT("[Blinking]: BlinkAnimationTimerValue %i"), BlinkAnimationTimer);
 				if(cur_value<=1.0 && !bEyesClosed)
 				{
 					UE_LOG(LogTemp, Display, TEXT("[Blinking]: closing"));
-					cur_value = FMath::FInterpConstantTo(cur_value, 1.0, DeltaTime, 10);
-					if(owner->GetBodyType()==BodyType::CC3) AnimInstance->SetMorphTarget(FName("Eye_Blink"), cur_value);
-					else AnimInstance->EyeBlink = cur_value;
+					cur_value = FMath::FInterpConstantTo(cur_value, 1.0, DeltaTime, 8);
+					// if(owner->GetBodyType()==BodyType::CC3) AnimInstance->SetMorphTarget(FName("Eye_Blink"), cur_value);
+					// else AnimInstance->EyeBlink = cur_value;
 					if(cur_value==1.0) bEyesClosed = true;
 				}
 				else
 				{
 					UE_LOG(LogTemp, Display, TEXT("[Blinking]: opening"));
-					cur_value = FMath::FInterpConstantTo(cur_value, 0.0, DeltaTime, 10);
-					if(owner->GetBodyType()==BodyType::CC3) AnimInstance->SetMorphTarget(FName("Eye_Blink"), cur_value);
-					else AnimInstance->EyeBlink = cur_value;
+					cur_value = FMath::FInterpConstantTo(cur_value, 0.0, DeltaTime, 8);
+					// if(owner->GetBodyType()==BodyType::CC3) AnimInstance->SetMorphTarget(FName("Eye_Blink"), cur_value);
+					// else AnimInstance->EyeBlink = cur_value;
 					if(cur_value==0)
 					{
 						UE_LOG(LogTemp, Display, TEXT("[Blinking]: done"));
 						std::normal_distribution<float> gBlink(intervalBlink, intervalBlinkStD);
 						nextBlink = gBlink(gen);
 						lastBlink = 0;
+						timeLastBlink = 0;
 						BlinkAnimationTimer = 0;
 						bEyesClosed = false;
 					}
 				}
 			
 			}
+			if(owner->GetBodyType()==BodyType::CC3) AnimInstance->SetMorphTarget(FName("Eye_Blink"), cur_value);
+			else AnimInstance->EyeBlink = cur_value;
 		}
 
 		if(timeInState%15==0)

Source/CharacterPlugin/Public/VHSaccades.h

@@ -40,7 +40,7 @@ private:
 	float GenerateDirection();
 	int timeInState;
 	int lastBlink; //in frames
-	const int blinkDuration = 20;
+	float timeLastBlink; //in ms
 	int BlinkAnimationTimer;
 	const float intervalBlink = 3.4; //in ms
 	const float intervalBlinkStD = 0.8; //in ms
@@ -50,5 +50,4 @@ private:
 	FRotator EyeOrientation;
 	AVirtualHuman* owner = nullptr;
 	UVHAnimInstance* AnimInstance = nullptr;
-		
 };