1 files changed, 69 insertions, 0 deletions
diff --git a/rotord/rotor.h b/rotord/rotor.h
index 953a69b..3f51d79 100755
--- a/rotord/rotor.h
+++ b/rotord/rotor.h
@@ -1160,6 +1160,75 @@ namespace Rotor {
 		private:
 			Image image;
 	};
+	class Transform: public Image_node {
+		//what is the best coordinate system to use?
+		//origin: corner or centre
+		//units: pixel or fractional
+		//aspect: scaled or homogenous
+		public:
+			Transform(){};
+			Transform(map<string,string> &settings) {
+				base_settings(settings);
+				tX=find_setting(settings,"transformX",0.0f);
+				tY=find_setting(settings,"transformY",0.0f);
+				oX=find_setting(settings,"originX",0.5f);
+				oY=find_setting(settings,"originX",0.5f);
+				r=find_setting(settings,"rotation",0.0f);
+				s=find_setting(settings,"scale",1.0f);
+			};
+			~Transform(){
+			};
+			Transform* clone(map<string,string> &_settings) { return new Transform(_settings);};
+			Image *output(const Frame_spec &frame){
+				if (image_inputs.size()) {
+					if (image_inputs[0]->connection){
+						Image *other=(((Image_node*)image_inputs[0]->connection)->get_output(frame));
+						if (other) {
+							image.setup(other->w,other->h);
+							//do opencv transform
+							cv::Point2f srcTri[3], dstTri[3];
+							cv::Mat rot_mat(2,3,CV_32FC1);
+							cv::Mat trans_mat(2,3,CV_32FC1);
+
+							/*
+							Image inter;
+							inter.setup(other->w,other->h);
+							// Compute matrix by creating triangle and transforming
+							//is there a better way - combine the 2? Just a bit of geometry
+							srcTri[0].x=0;
+							srcTri[0].y=0;
+							srcTri[1].x=other->w-1;
+							srcTri[1].y=0;
+							srcTri[2].x=0;
+							srcTri[2].y=other->h-1;
+							for (int i=0;i<3;i++){
+								dstTri[i].x=srcTri[i].x+(tX*other->w);
+								dstTri[i].y=srcTri[i].y+(tY*other->h);
+							}
+							trans_mat=getAffineTransform( srcTri, dstTri );
+							warpAffine( other->rgb, inter.rgb, trans_mat, inter.rgb.size() );
+							*/
+
+							// Compute rotation matrix
+							//
+							cv::Point centre = cv::Point( oX*other->w, oY*other->h );
+
+							rot_mat = getRotationMatrix2D( centre, r, s );
+							// Do the transformation
+							//
+							warpAffine( other->rgb, image.rgb, rot_mat, image->rgb.size() );
+
+		                    return &image;
+		                }
+	                }
+			    }
+				return nullptr;
+			}
+		private:
+			Image image;
+			float tX,tY,oX,oY,r,s;
+			//todo - quality settings
+	};
 	//-------------------------------------------------------------------
 	class Node_factory{
 		public: