notify the lua script of an updated projection, in more cases (re: #130)

desmume/src/gfx3d.cpp

@@ -1234,6 +1234,11 @@ static BOOL gfx3d_glMultMatrix4x4(s32 v)
 		GFX_DELAY_M2(30);
 	}
 
+	if(mode == MATRIXMODE_PROJECTION)
+	{
+		UpdateProjection();
+	}
+
 	//printf("mult4x4: matrix %d to: \n",mode); MatrixPrint(mtxCurrent[1]);
 
 	MatrixIdentity(mtxTemporal);
@@ -1265,6 +1270,11 @@ static BOOL gfx3d_glMultMatrix4x3(s32 v)
 		GFX_DELAY_M2(30);
 	}
 
+	if(mode == MATRIXMODE_PROJECTION)
+	{
+		UpdateProjection();
+	}
+
 	//printf("mult4x3: matrix %d to: \n",mode); MatrixPrint(mtxCurrent[1]);
 
 	//does this really need to be done?
@@ -1298,6 +1308,11 @@ static BOOL gfx3d_glMultMatrix3x3(s32 v)
 		GFX_DELAY_M2(30);
 	}
 
+	if(mode == MATRIXMODE_PROJECTION)
+	{
+		UpdateProjection();
+	}
+
 	//printf("mult3x3: matrix %d to: \n",mode); MatrixPrint(mtxCurrent[1]);
 
 
@@ -2421,6 +2436,10 @@ void gfx3d_VBlankSignal()
 		gfx3d_doFlush();
 		GFX_DELAY(392);
 		isSwapBuffers = FALSE;
+		
+		//let's consider this the beginning of the next 3d frame.
+		//in case the game isn't constantly restoring the projection matrix, we want to ping lua
+		UpdateProjection();
 	}
 }