Merge branch 'partner/pi-develop' into develop

Author: Patrick Meehan

src/moai-sim/MOAIGraphicsPropBase.cpp

@@ -452,7 +452,6 @@ void MOAIGraphicsPropBase::MOAIDrawable_DrawDebug ( int subPrimID ) {
 ZLMatrix4x4 MOAIGraphicsPropBase::MOAIGraphicsPropBase_GetWorldDrawingMtx () {
 
 	MOAIGfxState& gfxState = MOAIGfxMgr::Get ().mGfxState;
-	//MOAIRenderMgr& renderMgr = MOAIRenderMgr::Get ();
 
 	ZLMatrix4x4 worldDrawingMtx;
 
@@ -521,9 +520,9 @@ ZLMatrix4x4 MOAIGraphicsPropBase::MOAIGraphicsPropBase_GetWorldDrawingMtx () {
 
 		case BILLBOARD_COMPASS: {
 
-			//const ZLAffine3D& cameraMtx = camera->GetLocalToWorldMtx (); // inv view mtx
+			
+		
 			ZLAffine3D cameraMtx ( gfxState.GetMtx ( MOAIGfxState::VIEW_TO_WORLD_MTX ));
-			//ZLVec3D cameraZ = cameraMtx.GetZAxis ();
 			ZLVec3D	cameraY = cameraMtx.GetYAxis ();
 
 			cameraY.mZ = 0.0f;
@@ -532,7 +531,7 @@ ZLMatrix4x4 MOAIGraphicsPropBase::MOAIGraphicsPropBase_GetWorldDrawingMtx () {
 			ZLVec2D mapY ( cameraY.mX, cameraY.mY );
 			ZLVec2D worldY ( 0.0f, 1.0f );
 
-			float radians = mapY.Radians ( worldY );
+			float radians = -mapY.Radians ( worldY );
 
 			if ( cameraY.mX < 0.0f ) {
 				radians = -radians;
@@ -548,9 +547,19 @@ ZLMatrix4x4 MOAIGraphicsPropBase::MOAIGraphicsPropBase_GetWorldDrawingMtx () {
 			mtx.Translate ( this->mPiv.mX, this->mPiv.mY, this->mPiv.mZ );
 			billboardMtx.Append ( mtx );
 
+			// now that we've calculated the compass billboard, here's the tricky part.
+			// we need to sandwich it into the local-to-world matrix, after the scale and rotate,
+			// but before the translation. it's not sufficient just to prepend as we'd wind up
+			// with compass-scale-rotate-translate. in that scenario, if scale != 1, then it will
+			// mess up the compass transform. so we need to do scale-rotate-compass-translate instead.
+			
 			worldDrawingMtx = ZLMatrix4x4 ( this->GetLocalToWorldMtx ());
-			worldDrawingMtx.Prepend ( billboardMtx );
-		
+			
+			ZLVec4D localToWorldTranslation = worldDrawingMtx.GetColumn ( 3 ); // extract the translation
+			worldDrawingMtx.SetColumn ( 3, ZLVec4D::ORIGIN ); // set translation back to origin
+			worldDrawingMtx.Append ( billboardMtx ); // this gives us scale-rotate-billboard
+			worldDrawingMtx.SetColumn ( 3, localToWorldTranslation ); // scale-rotate-billboard-translation
+			
 			break;
 		}
 

src/zl-util/ZLMatrix4x4.h

@@ -180,6 +180,20 @@ class ZLMetaMatrix4x4 {
 		m [ C3_R3 ] = 0;
 	}
 
+	//----------------------------------------------------------------//
+	ZLMetaVec4D < TYPE > GetColumn ( int c ) const {
+
+		ZLMetaVec4D < TYPE > col;
+		
+		c *= 4;
+		col.mX = this->m [ c++ ];
+		col.mY = this->m [ c++ ];
+		col.mZ = this->m [ c++ ];
+		col.mW = this->m [ c ];
+
+		return col;
+	}
+
 	//----------------------------------------------------------------//
 	TYPE GetElement ( int c, int r ) const {
 
@@ -772,6 +786,16 @@ class ZLMetaMatrix4x4 {
 		m[C3_R3]	= 1;
 	}
 
+	//----------------------------------------------------------------//
+	void SetColumn ( int c, const ZLMetaVec4D < TYPE >& col ) {
+		
+		c *= 4;
+		this->m [ c++ ] = col.mX;
+		this->m [ c++ ] = col.mY;
+		this->m [ c++ ] = col.mZ;
+		this->m [ c ] = col.mW;
+	}
+
 	//----------------------------------------------------------------//
 	void SetElement ( int c, int r, float value ) const {
 

src/zl-util/ZLVec4D.h

@@ -14,6 +14,7 @@ class ZLMetaVec4D :
 	public ZLMetaVec3D < TYPE > {
 public:
 
+	static const ZLMetaVec4D < TYPE > ORIGIN;
 	static const ZLMetaVec4D < TYPE > ZERO;
 	static const ZLMetaVec4D < TYPE > X_AXIS;
 	static const ZLMetaVec4D < TYPE > Y_AXIS;
@@ -68,6 +69,7 @@ class ZLMetaVec4D :
 	}
 };
 
+template < typename TYPE > const ZLMetaVec4D < TYPE > ZLMetaVec4D < TYPE >::ORIGIN ( 0.0f, 0.0f, 0.0f, 1.0f );
 template < typename TYPE > const ZLMetaVec4D < TYPE > ZLMetaVec4D < TYPE >::ZERO ( 0.0f, 0.0f, 0.0f, 0.0f );
 template < typename TYPE > const ZLMetaVec4D < TYPE > ZLMetaVec4D < TYPE >::X_AXIS ( 1.0f, 0.0f, 0.0f, 0.0f );
 template < typename TYPE > const ZLMetaVec4D < TYPE > ZLMetaVec4D < TYPE >::Y_AXIS ( 0.0f, 2.0f, 0.0f, 0.0f );

xcode/libmoai/libmoai.xcodeproj/project.pbxproj

@@ -22728,7 +22728,6 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				CLANG_CXX_LANGUAGE_STANDARD = "c++0x";
-				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_OBJC_WEAK = YES;
 				CLANG_WARN_CXX0X_EXTENSIONS = NO;
 				GCC_ENABLE_CPP_EXCEPTIONS = YES;
@@ -22775,7 +22774,6 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				CLANG_CXX_LANGUAGE_STANDARD = "c++0x";
-				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_OBJC_WEAK = YES;
 				CLANG_WARN_CXX0X_EXTENSIONS = NO;
 				GCC_ENABLE_CPP_EXCEPTIONS = YES;
@@ -22822,7 +22820,6 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				CLANG_CXX_LANGUAGE_STANDARD = "c++0x";
-				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_OBJC_WEAK = YES;
 				CLANG_WARN_CXX0X_EXTENSIONS = NO;
 				GCC_ENABLE_CPP_EXCEPTIONS = YES;