Add setVertex method to striangle surface to be able to move its corners

example/src/ofApp.cpp

@@ -12,6 +12,11 @@ void ofApp::setup()
 void ofApp::update()
 {
 	ofBackground(0);
+    
+    ofVec2f p;
+    p.x = ofRandomWidth();
+    p.y = ofRandomHeight();
+    triangleSurface.setVertex(0, p);
 }
 
 void ofApp::draw()

src/ofxBaseSurface.h

@@ -9,6 +9,7 @@ public:
     ofxBaseSurface();
     virtual void setup(){};
     virtual void draw(){};
+    virtual void setVertex(int index, ofVec2f p){};
     
 protected:
     ofMesh mesh;

src/ofxTriangleSurface.cpp

@@ -50,4 +50,14 @@ void ofxTriangleSurface::draw()
     texture->bind();
     mesh.draw();
     texture->unbind();
+}
+
+void ofxTriangleSurface::setVertex(int index, ofVec2f p)
+{
+    if ( index > 2 ) {
+        ofLog() << "Vertex with this index does not exist: " << index << endl;
+        return;
+    }
+    
+    mesh.setVertex(index, p);
 }

src/ofxTriangleSurface.h

@@ -13,6 +13,7 @@ public:
     void setup();
     void setup( ofVec2f p1, ofVec2f p2, ofVec2f p3, ofVec2f t1, ofVec2f t2, ofVec2f t3, ofTexture* texturePtr );
     void draw();
+    void setVertex( int index, ofVec2f p );
 };
 
 #endif