Trapez skalierung (mit fehlern?)

src/ofApp.cpp

@@ -47,7 +47,9 @@ void ofApp::draw(){
     ofSetColor(color);
     ofDrawRectangle(webcam.getWidth(), 0, 128, 128);
     if (color_picked == 1 && key_pressed == 0) {
-        SetCursorPos((center.x - x_offset) * x_scale, (center.y - y_offset) * y_scale);
+        scaleTrapeze();
+        scaleRectangel();
+        SetCursorPos(cp_cursor_position.x, cp_cursor_position.y);
     }
     
 }
@@ -77,9 +79,10 @@ void ofApp::mousePressed(int x, int y, int button) {
     if (calibrated == 4) {
         color = webcam.getPixels().getColor(x, y);
         printf("%i, %i, %i\n", color.r, color.g, color.b);
+        printf("%f, %f, %f, %f \n", y_offset, y_scale, x_offset, x_scale);
         color_picked = 1;
     }
-    if (calibrated != 4) {
+    if (calibrated != 4 && key_pressed == 0) {
         if (calibrated == 0) {
             GetCursorPos(&cp_top_left);
         }
@@ -91,14 +94,15 @@ void ofApp::mousePressed(int x, int y, int button) {
         }
         if (calibrated == 3) {
             GetCursorPos(&cp_bottom_left);
-            y_offset = (cp_top_left.y + cp_top_right.y) / 2.0;
-
-            y_scale = 1080 / ((cp_bottom_left.y + cp_bottom_right.y) / 2.0);
 
             x_offset = (cp_top_left.x + cp_bottom_left.x) / 2.0;
 
-            x_scale = 1920 / ((cp_top_right.x + cp_bottom_right.x) / 2.0);
+            x_scale = ofGetScreenWidth() / (cp_bottom_right.x - x_offset);
+
+            y_offset = (cp_top_left.y + cp_top_right.y) / 2.0;
 
+            y_scale = ofGetScreenHeight() / ((cp_bottom_left.y + cp_bottom_right.y) / 2.0 - y_offset);
+           
         }
         calibrated++;
     }
@@ -133,3 +137,22 @@ void ofApp::gotMessage(ofMessage msg){
 void ofApp::dragEvent(ofDragInfo dragInfo){ 
 
 }
+
+
+void ofApp::scaleTrapeze(void) {
+    left_pitch = (cp_top_left.y - cp_bottom_left.y) / (cp_top_left.x - cp_bottom_left.x);
+    right_pitch = (cp_top_right.y - cp_bottom_right.y) / (cp_top_right.x - cp_bottom_right.x);
+    middle = cp_top_right.x - cp_top_left.x;
+
+    if (center.x > middle) {
+        center.x = center.x + (((center.y - cp_top_right.y) / right_pitch) * ((cp_bottom_right.x - middle) - ((center.y - cp_top_right.y) / right_pitch)) / (center.x - middle));
+    }
+    else {
+        center.x = center.x + (((center.y - cp_top_left.y) / left_pitch) * ((middle - cp_bottom_left.x) - ((center.y - cp_top_left.y) / left_pitch)) / (middle - center.x));
+    }
+}
+
+void ofApp::scaleRectangel(void) {
+    cp_cursor_position.x = center.x * x_scale - x_offset;
+    cp_cursor_position.y = center.y * y_scale - y_offset;
+}

src/ofApp.h

@@ -23,6 +23,8 @@ class ofApp : public ofBaseApp{
 		void windowResized(int w, int h);
 		void dragEvent(ofDragInfo dragInfo);
 		void gotMessage(ofMessage msg);
+		void scaleRectangel(void);
+		void scaleTrapeze(void);
 
 		ofVideoGrabber webcam;
 		ofxCv::ContourFinder contour;
@@ -39,8 +41,11 @@ class ofApp : public ofBaseApp{
 		float y_offset;
 		float x_scale;
 		float x_offset;
+		float left_pitch;
+		float right_pitch;
+		float middle;
 		
-		POINT cp_top_left, cp_top_right, cp_bottom_left, cp_bottom_right;
+		POINT cp_top_left, cp_top_right, cp_bottom_left, cp_bottom_right, cp_cursor_position;
 
 		
 };