BGE patch: Add level option on sensor and fix sensor reset.

Level option is now available on all sensors but is only implemented on 
mouse and keyboard sensors. The purpose of that option is to make
the sensor react on level rather than edge by default. It's only
applicable to state engine system when there is a state transition:
the sensor will generate a pulse if the condition is met from the
start of the state. Normally, the keyboard sensor generate a pulse
only when the key is pressed and not when the key is already pressed.
This patch allows to select this behavior.
The second part of the patch corrects the reset method for sensors
with inverted output.

1 files changed, 10 insertions, 14 deletions

diff --git a/source/gameengine/GameLogic/SCA_KeyboardSensor.cpp b/source/gameengine/GameLogic/SCA_KeyboardSensor.cpp
index c6c06846e3b..43ce25f94df 100644
--- a/source/gameengine/GameLogic/SCA_KeyboardSensor.cpp
+++ b/source/gameengine/GameLogic/SCA_KeyboardSensor.cpp
@@ -77,7 +77,7 @@ void SCA_KeyboardSensor::Init()
 	// by the state engine. It reinitializes the sensor as if it was just created.
 	// However, if the target key is pressed when the sensor is reactivated, it
 	// will not generated an event (see remark in Evaluate()).
-	m_val = 0;
+	m_val = (m_invert)?1:0;
 }
 
 CValue* SCA_KeyboardSensor::GetReplica()
@@ -176,10 +176,10 @@ bool SCA_KeyboardSensor::Evaluate(CValue* eventval)
 				{
 					if (m_val == 0)
 					{
-						//see comment below
-						//m_val = 1;
-						//result = true;
-						;
+						if (m_level) {
+							m_val = 1;
+							result = true;
+						}
 					}
 				} else
 				{
@@ -229,15 +229,11 @@ bool SCA_KeyboardSensor::Evaluate(CValue* eventval)
 					{
 						if (m_val == 0)
 						{
-							//hmm, this abnormal situation may occur in the following cases:
-							//- the key was pressed while the scene was suspended
-							//- this is a new scene and the key is active from the start
-							//In the second case, it's dangerous to activate the sensor
-							//(think of a key to go to next scene)
-							//What we really need is a edge/level flag in the key sensor
-							//m_val = 1;
-							//result = true;
-							;
+							if (m_level) 
+							{
+								m_val = 1;
+								result = true;
+							}
 						}
 					}
 				}