Re-enable depth test after drawing particles

While the depth-test was already re-enabled in most cases, sometimes it
was not. This could cause some (spell) effects to shine through walls
while the player was casting.

Fixes bug #278

src/core/ArxGame.cpp

@@ -1825,7 +1825,7 @@ void ArxGame::Render() {
 			)
 		{
 			ARX_MAGICAL_FLARES_Draw(FRAMETICKS);
-				FRAMETICKS = (unsigned long)(arxtime);
+			FRAMETICKS = (unsigned long)(arxtime);
 		}
 	}
 #ifdef BUILD_EDITOR

src/core/Core.cpp

@@ -3274,7 +3274,7 @@ void DrawMagicSightInterface()
 
 	if (Flying_Eye)
 	{
-		GRenderer->SetBlendFunc(Renderer::BlendZero, Renderer::BlendInvSrcColor);										
+		GRenderer->SetBlendFunc(Renderer::BlendZero, Renderer::BlendInvSrcColor);
 		float col=(0.75f+PULSATE*( 1.0f / 20 ));
 
 		if (col>1.f) col=1.f;

src/graphics/particle/ParticleEffects.cpp

@@ -918,19 +918,20 @@ void ManageTorch()
 //-----------------------------------------------------------------------------
 void ARX_MAGICAL_FLARES_Draw(long FRAMETICKS)
 {
-	/////////FLARE
-	GRenderer->SetRenderState(Renderer::DepthWrite, false);
-	GRenderer->SetBlendFunc(Renderer::BlendOne, Renderer::BlendOne);
-	GRenderer->SetRenderState(Renderer::AlphaBlending, true);
 
 	shinum++;
 
 	if (shinum>=10) shinum=1;
 
 	long TICKS = long(arxtime) - FRAMETICKS;
 
-	if (TICKS<0) 
+	if (TICKS<0)
 		return;
+
+	/////////FLARE
+	GRenderer->SetRenderState(Renderer::DepthWrite, false);
+	GRenderer->SetBlendFunc(Renderer::BlendOne, Renderer::BlendOne);
+	GRenderer->SetRenderState(Renderer::AlphaBlending, true);
 
 	float z,s,r,g,b;
 
@@ -2311,6 +2312,7 @@ void ARX_PARTICLES_Render(EERIE_CAMERA * cam)
 			if (pcc<=0)
 			{
 				GRenderer->SetFogColor(ulBKGColor);
+				GRenderer->SetRenderState(Renderer::DepthTest, true);
 				return;
 			}
 		}