#include "viewpoint.h"
#define DEBUG 0

void viewpoint::setup(int ln,float w, float h, float x, float y) {
	lightNum=ln;
	window=ofRectangle(w,h,x,y);
	distortFactor=0.0;
	renderFBO.allocate(window.width,window.height,GL_RGB);

	//todo: load/save from xml
	fov=17.25;
	aspect=1.79;
	near=1;
	far=20;

	//camera.setParent(target);
	vars=new keyVar[8];

	//void set(char _keyInc,char _keyDec,float _val,float _speed,float _accel,float accelTime);
	vars[0].set('w','s',17.25,0.5,2.0,3.0);
	vars[1].set('g','d',0.0,100,3.0,3.0);
	vars[2].set('r','v',112,100,3.0,3.0);
	vars[3].set('t','c',0.0,100,3.0,3.0);
	vars[4].set('u','n',0.0,1.0,3.0,3.0);
	vars[5].set('j','h',0.0,1.0,3.0,3.0);
	vars[6].set('o','l',1000.0,200,3.0,3.0);
	vars[7].set('q','a',0,0.0001,2.0,3.0);
	
	//camera.setPosition(0,0,vars[6].getVal());
}
//--------------------------------------------------------------
void viewpoint::setLight(){
	target.setPosition(vars[1].getVal(),vars[2].getVal(),vars[3].getVal());
	/*
	target.rotate(vars[4].getInc(),1,0,0);
	target.rotate(vars[5].getInc(),0,1,0);
	camera.setPosition(0,0,vars[6].getVal());
	 */
	
	camera.orbit(vars[5].getVal(), vars[4].getVal(), vars[6].getVal(), target);
	camera.lookAt(target,ofVec3f(0,1,0));	
	ofVec3f lp=camera.getGlobalPosition();
	GLfloat lightPosition[] = {lp.x, lp.y, lp.z,1};
	GLfloat lightColour[] = {0.99, 0.99, 0.99, 0.5};
	glLightfv(lightNum, GL_POSITION, lightPosition);
	glLightfv(lightNum, GL_DIFFUSE, lightColour);
	glEnable(lightNum);
}
//--------------------------------------------------------------
void viewpoint::begin(){
	
	renderFBO.begin();
	ofClear(0,0,0);
	
	//ofPushView();
	
	camera.begin();
	camera.setFov(vars[0].getVal());
	
	
		
	}
//--------------------------------------------------------------
void viewpoint::end(){
	
	camera.end();
	//ofPopView();
	
	renderFBO.end();

	ofPushMatrix();
	
	bindTexture(renderFBO);

	//draw a grid
	//glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
	ofNoFill();

	ofSetLineWidth(1.0);
	//ofSetColor(I_fade1,I_fade1,I_fade1);
	int gridX=50;
	int gridY=50;
	int xStep=ofGetWidth()/2;
	int yStep=ofGetHeight()/2;
	ofTranslate(ofGetWidth()/2,ofGetHeight()/2);

	for (float i = -1; i < 1.001; i+=(2.0f/gridY)){

	    glBegin(GL_QUAD_STRIP);
	    ofPoint p0;
	    ofPoint p1;
		for (float j = -1; j < 1.001; j+=(2.0f/gridX)){
		    p0=distort(ofPoint(j,i-(2.0f/gridY)),vars[7].getVal());
		    p1=distort(ofPoint(j,i),vars[7].getVal());
		    glTexCoord2f((j+1)*0.5,((i-(2.0f/gridY))+1)*0.5);
		    glVertex3f(p0.x*xStep,p0.y*yStep,-0.1);
		    glTexCoord2f((j+1)*0.5,(i+1)*0.5);
		    glVertex3f(p1.x*xStep,p1.y*yStep,-0.1);
		}

	    glEnd();
	   //
	}

	ofFill();

	unbindTexture(renderFBO);

	ofPopMatrix();
	
	//ofSetHexColor(0xFFFFFF);
    //ofDrawBitmapString("camera: "+ofToString(camera.getX(), 2)+","+ofToString(camera.getY(), 2)+","+ofToString(camera.getZ(), 2), 10, ofGetHeight()-30);
	//ofDrawBitmapString("light: "+ofToString(camera.getX(), 2)+","+ofToString(camera.getY(), 2)+","+ofToString(camera.getZ(), 2), 10, ofGetHeight()-30);

}
//--------------------------------------------------------------
void viewpoint::keyPressed(int key){
    for (int i=0;i<8;i++) vars[i].keyPressed(key);
    if (DEBUG) printf("fov: %f distort: %f\n",vars[0].getVal(),vars[7].getVal());
 }
//--------------------------------------------------------------
void viewpoint::keyReleased(int key){
	for (int i=0;i<8;i++) vars[i].keyReleased(key);
}