Add L/R trigger button tilt support.

UI/TiltEventProcessor.cpp

@@ -89,6 +89,10 @@ void TiltEventProcessor::TranslateTiltToInput(const Tilt &tilt) {
 	case TILT_ACTION_BUTTON:
 		GenerateActionButtonEvent(tilt);
 		break;
+
+	case TILT_TRIGGER_BUTTON:
+		GenerateTriggerButtonEvent(tilt);
+		break;
 	}
 }
 
@@ -154,6 +158,25 @@ void TiltEventProcessor::GenerateActionButtonEvent(const Tilt &tilt) {
 	tiltButtonsDown |= buttons[direction];
 }
 
+void TiltEventProcessor::GenerateTriggerButtonEvent(const Tilt &tilt) {
+	u32 upButtons = 0;
+	u32 downButtons = 0;
+	// KISS, let's only look at X.  Expect deadzone to already be applied.
+	if (tilt.x_ == 0.0f) {
+		upButtons = CTRL_LTRIGGER | CTRL_RTRIGGER;
+	} else if (tilt.x_ < 0.0f) {
+		downButtons = CTRL_LTRIGGER;
+		upButtons = CTRL_RTRIGGER;
+	} else if (tilt.x_ > 0.0f) {
+		downButtons = CTRL_RTRIGGER;
+		upButtons = CTRL_LTRIGGER;
+	}
+
+	__CtrlButtonUp(upButtons);
+	__CtrlButtonDown(downButtons);
+	tiltButtonsDown = (tiltButtonsDown & ~upButtons) | downButtons;
+}
+
 void TiltEventProcessor::ResetTiltEvents() {
 	// Reset the buttons we have marked pressed.
 	__CtrlButtonUp(tiltButtonsDown);