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#pragma once
#include "ofMain.h"
#define min(a,b) ((a) < (b) ? (a) : (b))
#define max(a,b) ((a) > (b) ? (a) : (b))
/*
try to set up coords manually for a sequence of images and prototype a flythrough
a linked list with
image
pointer to next image
position, scale and rotation of next image
*/
class chainImage : public ofImage{
//todo: threaded image loader
public:
void init(ofPoint _linkPos,float _linkScale,float _linkRot,float _speed=0.99f,float _fadeIn=1.0f){
linkPos=_linkPos;
linkScale=_linkScale;
linkRot=_linkRot;
speed=_speed;
fadeIn=_fadeIn;
setAnchorPoint(getWidth()/2,getHeight()/2);
}
void start(){
transition=0.0f;
time=ofGetElapsedTimef();
setUseTexture(true);
scale=linkScale;
}
bool update(){
//transition+=(ofGetElapsedTimef()-time)*speed;
//hard to make the algorithm framerate invariant
//if it's exponenential
scale*=speed;
transition=-(scale-linkScale)/(linkScale-(linkScale*link->linkScale));
//time=ofGetElapsedTimef();
if (scale>linkScale*link->linkScale) return false;
else {
transition = 1.0f;
return true;
}
}
ofVec3f getTransform(){
//move from linkPos to link->linkPos
/*
ofVec3f _scaledTarget = link->linkPos * linkScale;
return linkPos + ( _scaledTarget * transition );
*/
/*
ofPoint o;
o = linkPos + ( _scaledTarget * transition );
o.x=linkPos.x+((link->linkPos.x/scale)-linkPos.x)*link->linkScale*transition);
o.y=linkPos.y+((link->linkPos.y-linkPos.y)*link->linkScale*transition);
o.z=linkPos.z+((link->linkPos.z-linkPos.z)*link->linkScale*transition);
return o;
*/
///*
ofVec3f _scaledTarget = link->linkPos * linkScale;
/*
ofVec3f _st = _scaledTarget * transition;
printf(">>scaledTarget %f,%f,%f %f to %f,%f,%f\n",
_scaledTarget.x,
_scaledTarget.y,
_scaledTarget.z,
transition,
_st.x,
_st.y,
_st.z);
*/
return linkPos + ( _scaledTarget * transition );
//*/
}
float getScale(){
//rather than each frame scale being an increment of the previous
//each frame should be the same ratio from the previous
//to get from 0.2 to .04 in 400 frames then 0.2 * (X ^ 400) = 0.04
//x = 400 v- 0.2
//or, just do it empirically with an exponential factor
return scale;
//return ofLerp(linkScale,link->linkScale*linkScale,transition);
}
void drawChain(){
glPushMatrix();
ofDisableAlphaBlending();
ofSetColor(255,255,255,255);
draw(0,0,getWidth(),getHeight());
glTranslatef(linkPos.x,linkPos.y,0);
glScalef(linkScale,linkScale,linkScale);
ofEnableAlphaBlending();
ofSetColor(255,255,255,255*min(1.0,transition/fadeIn));
link->draw(0,0,link->getWidth(),link->getHeight());
glPopMatrix();
}
chainImage *link;
ofPoint linkPos;
float linkScale;
float linkRot;
float transition;
float fadeIn;
float speed;
float time;
float scale;
};
class ofApp : public ofBaseApp{
public:
void setup();
void update();
void draw();
void keyPressed(int key);
void keyReleased(int key);
void mouseMoved(int x, int y );
void mouseDragged(int x, int y, int button);
void mousePressed(int x, int y, int button);
void mouseReleased(int x, int y, int button);
void mouseEntered(int x, int y);
void mouseExited(int x, int y);
void windowResized(int w, int h);
void dragEvent(ofDragInfo dragInfo);
void gotMessage(ofMessage msg);
chainImage i1,i2,i3;
chainImage *currentImage;
ofImage grab;
vector<string> arguments;
ofCamera viewpoint;
float startTime,timescaling;
int currentFrame;
};
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