Integrare `HomographyHelper` into ofxPiMapper more deeply

example/example.xcodeproj/project.pbxproj

@@ -14,7 +14,7 @@
 		39264841192224F90008A7F5 /* tinyxml.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 3926483D192224F90008A7F5 /* tinyxml.cpp */; };
 		39264842192224F90008A7F5 /* tinyxmlerror.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 3926483F192224F90008A7F5 /* tinyxmlerror.cpp */; };
 		39264843192224F90008A7F5 /* tinyxmlparser.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 39264840192224F90008A7F5 /* tinyxmlparser.cpp */; };
-		3926516E1C54292E00C54844 /* ofxHomographyHelper.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 3926516D1C54292E00C54844 /* ofxHomographyHelper.cpp */; };
+		392651711C5429C600C54844 /* HomographyHelper.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 392651701C5429C600C54844 /* HomographyHelper.cpp */; };
 		3933D5D319BB87BD000ACA55 /* ofxBaseGui.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 3933D5C219BB87BD000ACA55 /* ofxBaseGui.cpp */; };
 		3933D5D419BB87BD000ACA55 /* ofxButton.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 3933D5C419BB87BD000ACA55 /* ofxButton.cpp */; };
 		3933D5D519BB87BD000ACA55 /* ofxGuiGroup.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 3933D5C719BB87BD000ACA55 /* ofxGuiGroup.cpp */; };
@@ -148,8 +148,8 @@
 		3926483E192224F90008A7F5 /* tinyxml.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = tinyxml.h; sourceTree = "<group>"; };
 		3926483F192224F90008A7F5 /* tinyxmlerror.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = tinyxmlerror.cpp; sourceTree = "<group>"; };
 		39264840192224F90008A7F5 /* tinyxmlparser.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = tinyxmlparser.cpp; sourceTree = "<group>"; };
-		3926516C1C54292E00C54844 /* ofxHomographyHelper.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ofxHomographyHelper.h; sourceTree = "<group>"; };
-		3926516D1C54292E00C54844 /* ofxHomographyHelper.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = ofxHomographyHelper.cpp; sourceTree = "<group>"; };
+		3926516F1C5429C600C54844 /* HomographyHelper.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = HomographyHelper.h; sourceTree = "<group>"; };
+		392651701C5429C600C54844 /* HomographyHelper.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = HomographyHelper.cpp; sourceTree = "<group>"; };
 		3933D5C219BB87BD000ACA55 /* ofxBaseGui.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = ofxBaseGui.cpp; sourceTree = "<group>"; };
 		3933D5C319BB87BD000ACA55 /* ofxBaseGui.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ofxBaseGui.h; sourceTree = "<group>"; };
 		3933D5C419BB87BD000ACA55 /* ofxButton.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = ofxButton.cpp; sourceTree = "<group>"; };
@@ -488,8 +488,8 @@
 		39836CC71C502108006DB042 /* Utils */ = {
 			isa = PBXGroup;
 			children = (
-				3926516C1C54292E00C54844 /* ofxHomographyHelper.h */,
-				3926516D1C54292E00C54844 /* ofxHomographyHelper.cpp */,
+				3926516F1C5429C600C54844 /* HomographyHelper.h */,
+				392651701C5429C600C54844 /* HomographyHelper.cpp */,
 			);
 			path = Utils;
 			sourceTree = "<group>";
@@ -968,7 +968,6 @@
 				39C1246A19F0AB96005DF557 /* QuadSurface.cpp in Sources */,
 				39C1247F19F187D5005DF557 /* RadioList.cpp in Sources */,
 				39C1243419EE9589005DF557 /* Base64Encoding.cpp in Sources */,
-				3926516E1C54292E00C54844 /* ofxHomographyHelper.cpp in Sources */,
 				397EFC7F1A08FE720009286E /* FboSource.cpp in Sources */,
 				397C46C21C3AE2A7002689E2 /* SurfaceFactory.cpp in Sources */,
 				E4B69E200A3A1BDC003C02F2 /* main.cpp in Sources */,
@@ -1027,6 +1026,7 @@
 				E4B69E210A3A1BDC003C02F2 /* ofApp.cpp in Sources */,
 				39C1244B19EE9589005DF557 /* snappy.cc in Sources */,
 				3933D5D719BB87BD000ACA55 /* ofxPanel.cpp in Sources */,
+				392651711C5429C600C54844 /* HomographyHelper.cpp in Sources */,
 				39C1247D19F187D5005DF557 /* CircleJoint.cpp in Sources */,
 				39264842192224F90008A7F5 /* tinyxmlerror.cpp in Sources */,
 				3926483B192224DA0008A7F5 /* ofxXmlSettings.cpp in Sources */,

src/Surfaces/QuadSurface.cpp

@@ -226,10 +226,9 @@ void QuadSurface::calculateHomography(){
 	dst[3][0] = p3.x;
 	dst[3][1] = p3.y;
 	
-    ofxHomographyHelper::findHomography(src, dst, _matrix);
+    HomographyHelper::findHomography(src, dst, _matrix);
 }
 
-
 void QuadSurface::setPerspectiveWarping(bool b){
 	_perspectiveWarping = b;
 }

src/Surfaces/QuadSurface.h

@@ -3,7 +3,7 @@
 #include "ofMain.h"
 #include "BaseSurface.h"
 #include "SurfaceType.h"
-#include "ofxHomographyHelper.h"
+#include "HomographyHelper.h"
 
 namespace ofx {
 namespace piMapper {

src/Utils/ofxHomographyHelper.cpp → src/Utils/HomographyHelper.cpp

@@ -1,5 +1,5 @@
 /*
- *  ofxHomographyHelper.cpp
+ *  HomographyHelper
  *  Created by Elliot Woods on 26/11/2010.
  *  Edited by Krisjanis Rijnieks on 23/01/2016
  *
@@ -9,9 +9,12 @@
  *	http://www.openframeworks.cc/forum/viewtopic.php?f=9&t=3121
  */
 
-#include "ofxHomographyHelper.h"
+#include "HomographyHelper.h"
 
-void ofxHomographyHelper::gaussian_elimination(float *input, int n){
+namespace ofx {
+namespace piMapper {
+
+void HomographyHelper::gaussian_elimination(float *input, int n){
 	// ported to c from pseudocode in
 	// http://en.wikipedia.org/wiki/Gaussian_elimination
 	
@@ -66,7 +69,7 @@ void ofxHomographyHelper::gaussian_elimination(float *input, int n){
 }
 
 
-void ofxHomographyHelper::findHomography(float src[4][2], float dst[4][2], float homography[16]){
+void HomographyHelper::findHomography(float src[4][2], float dst[4][2], float homography[16]){
 	
 	// create the equation system to be solved
 	//
@@ -112,3 +115,6 @@ void ofxHomographyHelper::findHomography(float src[4][2], float dst[4][2], float
 	
 	for(int i=0;i<16;i++) homography[i] = aux_H[i];
 }
+
+} // namespace piMapper
+} // namespace ofx

src/Utils/ofxHomographyHelper.h → src/Utils/HomographyHelper.h

@@ -1,5 +1,5 @@
 /*
- *  ofxHomographyHelper.cpp
+ *  HomographyHelper
  *  Created by Elliot Woods on 26/11/2010.
  *  Edited by Krisjanis Rijnieks on 23/01/2016
  *
@@ -13,9 +13,14 @@
 
 #include "ofMatrix4x4.h"
 
-class ofxHomographyHelper {
+namespace ofx {
+namespace piMapper {
+
+class HomographyHelper {
 	public:
 		static void gaussian_elimination(float *input, int n);
 		static void findHomography(float src[4][2], float dst[4][2], float homography[16]);
 };
 
+}
+}