From 742e27767fd4208afe99ac42f243b88eef0ed7b3 Mon Sep 17 00:00:00 2001
From: Tim Redfern <tim@getdrop.com>
Date: Thu, 31 Aug 2017 10:08:40 +0100
Subject: bezier movement

---
 gui/src/chainImage.cpp | 63 +++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 57 insertions(+), 6 deletions(-)

(limited to 'gui/src/chainImage.cpp')

diff --git a/gui/src/chainImage.cpp b/gui/src/chainImage.cpp
index 643bb2e..032b54c 100644
--- a/gui/src/chainImage.cpp
+++ b/gui/src/chainImage.cpp
@@ -19,14 +19,43 @@ void chainImage::start(){
 	time=ofGetElapsedTimef();
 	setUseTexture(true);
 	scale=linkScale;
+
+	path.clear();
+
+	path.addVertex(linkPos);
+	//path.addVertex(linkPos+(link->linkPos*linkScale));
+	
+	ofPoint destination=linkPos+(link->linkPos*linkScale);
+	ofPoint previous=linkPos+(link->linkPos*linkScale*(1.0f-BEZIER_IN));
+
+	path.bezierTo(
+		linkPos.x*(1.0f+BEZIER_OUT),linkPos.y*(1.0f+BEZIER_OUT),
+		previous.x,previous.y,
+		destination.x,destination.y);
+
+	//totalframes=log(1.0f/256)/log(decayRatio);
+	//framecount=0;
 }
 
 bool chainImage::update(float decayRatio){
 
 	scale*=decayRatio;
 
+	//framecount++;
+
+	//find n such that decayRatio^n=1/256
+	//logarithm of x base b = log(x)/log(b)
+
+	//log(decayRatio,decayRatio^n)
+
+	//n = log(decayRatio,1/256)
+
+
 	transition=-(scale-linkScale)/(linkScale-(linkScale*link->linkScale));
 
+	//transition=min(1.0f,((float)framecount)/totalframes);
+
+
 	if (scale>linkScale*link->linkScale) return false;
 	else {
 		transition = 1.0f;
@@ -35,9 +64,13 @@ bool chainImage::update(float decayRatio){
 }
 ofVec3f chainImage::getTransform(){
 
-	ofVec3f _scaledTarget = link->linkPos * linkScale;
+	//ofVec3f _scaledTarget = link->linkPos * linkScale;
 	
-	return linkPos + ( _scaledTarget * transition );
+	//return linkPos + ( _scaledTarget * transition );
+
+	//ofPoint 
+
+	return path.getPointAtPercent(transition);
 }
 float chainImage::getScale(){
 
@@ -328,6 +361,24 @@ void chainImageSet::keyPressed(ofKeyEventArgs &keyargs){
 		case OF_KEY_RIGHT:
 			selected->linkPos.x++;
 			break;
+		case OF_KEY_BACKSPACE:{
+			images.clear();
+			/*
+			auto previous=selected;
+			previous--;
+			if (previous==images.end()){
+				previous=images.end()--;
+			}
+			previous->link=selected->link;
+			printf("DELETED: %s \n",selected->filename.c_str());
+			images.erase(selected);
+			selected=previous++;
+			if (selected==images.end()){
+				selected=images.begin();
+			}
+			break;
+			*/
+		}
 		case 's':
 		case 83: {
 			//printf("Saving... keyargs modifiers:%i\n",keyargs.modifiers);
@@ -455,13 +506,13 @@ bool chainImageSet::loadJson(std::string _filename){
 }
 	
 void chainImageSet::update(){
-	float decay_factor=0.995;
-	if (images.size()){
-		if (currentImage->update(decay_factor)){ //if returns true, switch images
+	
+	if (images.size()){	
+		if (currentImage->update(decayFactor)){ //if returns true, switch images
 			currentImage=currentImage->link;
 			currentImage->start();
 			ofLogNotice() << "Switched images";
-			currentImage->update(decay_factor); 
+			currentImage->update(decayFactor); 
 		} 
 	}
 }
-- 
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