Shake without effecting the real camera pos

The camera shake effect does not manipulate the real camera pos anymore, 
just the Opengl campos is effected by it. By this all camera pos related caches 
don't need to refresh just beause the camera shakes.

source/glest_game/game/game_camera.cpp

@@ -73,6 +73,7 @@ GameCamera::GameCamera() : pos(0.f, defaultHeight, 0.f),
 
 	shakeDecrement=0.f;
 	currentShakeIntensity=0;
+	shakeOffset= Vec2f(0.f);
 
 	//maxRenderDistance = Config::getInstance().getFloat("RenderDistanceMax","64");
 	maxHeight = Config::getInstance().getFloat("CameraMaxDistance","20");
@@ -173,8 +174,11 @@ void GameCamera::shake(int shakeDuration, int shakeStartIntensity , bool cameraD
 void GameCamera::shakeCamera(){
 	//RandomGen random;
 	if(currentShakeIntensity > 0.f) {
-		pos.x += (((float) (rand() % 50)) / 50.f - 0.5f) * currentShakeIntensity;
-		pos.z += (((float) (rand() % 50)) / 50.f - 0.5f) * currentShakeIntensity;
+//		pos.x += (((float) (rand() % 50)) / 50.f - 0.5f) * currentShakeIntensity;
+//		pos.z += (((float) (rand() % 50)) / 50.f - 0.5f) * currentShakeIntensity;
+
+		shakeOffset.x = (((float) (rand() % 50)) / 50.f - 0.5f) * currentShakeIntensity;
+		shakeOffset.y = (((float) (rand() % 50)) / 50.f - 0.5f) * currentShakeIntensity;
 		currentShakeIntensity -= shakeDecrement;
 	}
 }

source/glest_game/game/game_camera.h

@@ -62,6 +62,7 @@ public:
 private:
 	Vec3f pos;
 	Vec3f destPos;
+	Vec2f shakeOffset;
 
     float hAng;	//YZ plane positive -Z axis
     float vAng;	//XZ plane positive +Z axis
@@ -118,6 +119,7 @@ public:
 	void setPos(Vec2f pos);
 	void setPos(Vec3f pos);
 
+	const Vec2f &getShakeOffset() const	{return shakeOffset;}
 	void shake(int shakeDuration, int shakeStartIntensity , bool cameraDistanceAffected, Vec3f unitVector);
 
 	void setMoveX(float f)		{this->move.x= f;}

source/glest_game/graphics/renderer.cpp

@@ -1128,7 +1128,9 @@ void Renderer::loadGameCameraMatrix() {
 	if(gameCamera != NULL) {
 		glRotatef(gameCamera->getVAng(), -1, 0, 0);
 		glRotatef(gameCamera->getHAng(), 0, 1, 0);
-		glTranslatef(-gameCamera->getPos().x, -gameCamera->getPos().y, -gameCamera->getPos().z);
+		glTranslatef(-(gameCamera->getPos().x + gameCamera->getShakeOffset().x),
+				-gameCamera->getPos().y,
+				-(gameCamera->getPos().z + gameCamera->getShakeOffset().y));
 	}
 }