Compilation changes

Few compile time attempts to speed things up

Swap include guards for pramga once
Change compile options in the cmakeLists for source
generate a pch

small tweaks

Engine/source/gfx/util/distanceField.h

@@ -19,6 +19,7 @@
 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 // IN THE SOFTWARE.
 //-----------------------------------------------------------------------------
+#pragma once 
 #ifndef _DISTANCE_FIELD_H_
 #define _DISTANCE_FIELD_H_
 

Engine/source/gfx/util/gfxFrustumSaver.h

@@ -24,10 +24,7 @@
 #define TORQUE_GFX_UTIL_GFXFRUSTUMSAVER_H_
 
 #include "platform/types.h"
-
-#ifndef _MATHUTIL_FRUSTUM_H_
 #include "math/util/frustum.h"
-#endif
 
 class GFXFrustumSaver
 {

Engine/source/gfx/util/screenspace.h

@@ -19,6 +19,7 @@
 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 // IN THE SOFTWARE.
 //-----------------------------------------------------------------------------
+#pragma once 
 
 #ifndef _SCREENSPACE_UTILS_H_
 #define _SCREENSPACE_UTILS_H_

Engine/source/gfx/util/triListOpt.h

@@ -19,6 +19,7 @@
 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 // IN THE SOFTWARE.
 //-----------------------------------------------------------------------------
+#pragma once 
 
 #ifndef _TRI_LIST_OPT_H_
 #define _TRI_LIST_OPT_H_