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#include "chainImage.h"
#define min(a,b) ((a) < (b) ? (a) : (b))
#define max(a,b) ((a) > (b) ? (a) : (b))
float distance(ofPoint p1,ofPoint p2){
return pow(pow(p1.x-p2.x,2)+pow(p1.y-p2.y,2),0.5);
}
void chainImage::init(ofPoint _linkPos,float _linkScale,float _linkRot){
linkPos=_linkPos;
linkScale=_linkScale;
linkRot=_linkRot;
setAnchorPercent(0.5,0.5);
}
void chainImage::start(bool reverse){
transition=reverse?1.0f:0.0f;
time=ofGetElapsedTimef();
setUseTexture(true);
scale=reverse?linkScale*link->linkScale:linkScale;
}
int chainImage::updateOutput(float decayRatio){
//where there is rotation of the link, the path needs to be rotated
path.clear();
path.addVertex(linkPos);
//path.addVertex(linkPos+(link->linkPos*linkScale));
ofPoint rotated_destination=ofPoint(
(link->linkPos.x*cos(linkRot*(PI/180)))-(link->linkPos.y*sin(linkRot*(PI/180))),
(link->linkPos.y*cos(linkRot*(PI/180)))+(link->linkPos.x*sin(linkRot*(PI/180)))
);
ofPoint destination=linkPos+(rotated_destination*linkScale);
ofPoint previous=linkPos+(rotated_destination*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);
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){
transition = 0.0f;
return SWITCH_REVERSE;
}
if (scale>linkScale*link->linkScale){
return SWITCH_NONE;
}
transition = 1.0f;
return SWITCH_FORWARD;
}
ofVec3f chainImage::getTransform(){
//ofVec3f _scaledTarget = link->linkPos * linkScale;
//return linkPos + ( _scaledTarget * transition );
//ofPoint
return path.getPointAtPercent(transition);
}
float chainImage::getScale(){
return scale;
}
float chainImage::getRotation(){
//this is the camera rotation
//at the beginning of the transition
//this should rotate to match linkRot
//at the end, it should match link->linkRot
//when we switch image, link->linkRot becomes linkRot
//linkRot is no longer seen
return linkRot+(transition*link->linkRot); //linkRot+
};
void chainImage::makeThumbnail(){
thumbnail=(const ofImage)*this; //copy the ofImage itself
float thumbheight=THUMB_SIZE; //ofGetWindowHeight()*THUMB_BORDER_RATIO;
float thumbwidth=(thumbnail.getWidth()/thumbnail.getHeight())*thumbheight;
float borderwidth=ofGetWindowHeight()*(1.0-THUMB_BORDER_RATIO)*0.5;
printf("Rescaling: %fx%f to %fx%f for screen %fx%f, border %f\n",
thumbnail.getWidth(),thumbnail.getHeight(),
thumbwidth,thumbheight,
(float)ofGetWindowWidth(),(float)ofGetWindowHeight(),
borderwidth);
thumbnail.resize(thumbwidth,thumbheight);
thumbnail.setAnchorPoint(thumbnail.getWidth()/2,thumbnail.getHeight()/2);
}
void chainImage::drawChain(float fadeIn,bool additive, float intensity){
//printf("Drawing chain transition: %f\n",transition);
//we are correctly geting to 1
//the transformw don't quite add up?
glPushMatrix();
if (additive){
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
ofSetColor(255,255,255,255*(1.0f-min(1.0,transition/fadeIn))*intensity);
}
else {
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
ofSetColor(255,255,255,255*intensity);
}
//ofDisableAlphaBlending();
setAnchorPoint(getWidth()/2,getHeight()/2);
draw(0,0,getWidth(),getHeight());
glTranslatef(linkPos.x,linkPos.y,0);
glRotatef(linkRot,0,0,1);
glScalef(linkScale,linkScale,linkScale);
//ofEnableAlphaBlending();
glEnable(GL_BLEND);
ofSetColor(255,255,255,255*min(1.0,transition/fadeIn)*intensity);
link->setAnchorPoint(link->getWidth()/2,link->getHeight()/2);
link->draw(0,0,link->getWidth(),link->getHeight());
glDisable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glPopMatrix();
}
Json::Value chainImage::toJson(){
Json::Value json=Json::Value(Json::objectValue);
json["linkPos"]=Json::Value(Json::arrayValue);
json["linkPos"].append(linkPos.x);
json["linkPos"].append(linkPos.y);
json["linkScale"]=linkScale;
json["linkRot"]=linkRot;
json["filename"]=filename;
return json;
}
bool chainImage::fromJson(Json::Value json){
if (load(json["filename"].asString())){
linkPos=ofPoint(json["linkPos"][0].asDouble(),json["linkPos"][1].asDouble());
linkScale=json["linkScale"].asDouble();
linkRot=json["linkRot"].asDouble();
return true;
}
return false;
}
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