Add movable joints for texture edit mode

src/ofxSurfaceManagerGui.cpp

@@ -76,7 +76,15 @@ void ofxSurfaceManagerGui::mousePressed(ofMouseEventArgs &args)
         return;
     } else if ( guiMode == ofxGuiMode::TEXTURE_MAPPING ) {
         
-        if ( surfaceManager->getSelectedSurface() != NULL ) {
+        bool bSurfaceSelected = false;
+        
+        ofxCircleJoint* hitJoint = textureEditor.hitTestJoints(ofVec2f(args.x, args.y));
+        if ( hitJoint != NULL ) {
+            hitJoint->startDrag();
+            bSurfaceSelected = true;
+        }
+        
+        if ( surfaceManager->getSelectedSurface() != NULL && !bSurfaceSelected ) {
             // hittest texture area to see if we are hitting the texture surface
             if ( surfaceManager->getSelectedSurface()->getTextureHitArea().inside(args.x, args.y) ) {
                 clickPosition = ofVec2f(args.x, args.y);
@@ -125,6 +133,7 @@ void ofxSurfaceManagerGui::mouseReleased(ofMouseEventArgs &args)
 {
     stopDrag();
     projectionEditor.stopDragJoints();
+    textureEditor.stopDragJoints();
 }
 
 void ofxSurfaceManagerGui::mouseDragged(ofMouseEventArgs &args)

src/ofxTextureEditor.cpp

@@ -3,11 +3,38 @@
 ofxTextureEditor::ofxTextureEditor()
 {
     clear();
+    registerAppEvents();
 }
 
 ofxTextureEditor::~ofxTextureEditor()
 {
     clear();
+    unregisterAppEvents();
+}
+
+void ofxTextureEditor::registerAppEvents()
+{
+    ofAddListener(ofEvents().update, this, &ofxTextureEditor::update);
+}
+
+void ofxTextureEditor::unregisterAppEvents()
+{
+    ofRemoveListener(ofEvents().update, this, &ofxTextureEditor::update);
+}
+
+void ofxTextureEditor::update(ofEventArgs &args)
+{
+    if ( surface == NULL ) return;
+    
+    // update surface if one of the joints is being dragged
+    ofVec2f textureSize = ofVec2f( surface->getTexture()->getWidth(), surface->getTexture()->getHeight() );
+    for ( int i=0; i<joints.size(); i++ ) {
+        if ( joints[i]->isDragged() ) {
+            // update vertex to new location
+            surface->setTexCoord(i, joints[i]->position / textureSize);
+            break;
+        }
+    }
 }
 
 void ofxTextureEditor::draw()
@@ -66,4 +93,21 @@ void ofxTextureEditor::moveTexCoords(ofVec2f by)
         joints[i]->position += by;
         texCoords[i] = joints[i]->position / textureSize;
     }
+}
+
+void ofxTextureEditor::stopDragJoints()
+{
+    for (int i=0; i<joints.size(); i++){
+        joints[i]->stopDrag();
+    }
+}
+
+ofxCircleJoint* ofxTextureEditor::hitTestJoints(ofVec2f pos)
+{
+    for ( int i=0; i<joints.size(); i++ ) {
+        if ( joints[i]->hitTest(pos) ){
+            return joints[i];
+        }
+    }
+    return NULL;
 }

src/ofxTextureEditor.h

@@ -1,6 +1,7 @@
 #ifndef H_OFX_TEXTURE_EDITOR
 #define H_OFX_TEXTURE_EDITOR
 
+#include "ofEvents.h"
 #include "ofxBaseSurface.h"
 #include "ofxCircleJoint.h"
 
@@ -10,6 +11,10 @@ public:
     ofxTextureEditor();
     ~ofxTextureEditor();
     
+    void registerAppEvents();
+    void unregisterAppEvents();
+    
+    void update(ofEventArgs& args);
     void draw();
     void drawJoints();
     void setSurface(ofxBaseSurface* newSurface);
@@ -17,10 +22,12 @@ public:
     void createJoints();
     void clearJoints();
     void moveTexCoords(ofVec2f by);
+    void stopDragJoints();
+    ofxCircleJoint* hitTestJoints(ofVec2f pos);
     
 private:
     ofxBaseSurface* surface;
-    vector<ofxBaseJoint*> joints;
+    vector<ofxCircleJoint*> joints;
     
 };