#include "viewpoint.h"
#define DEBUG 1

void viewpoint::setup(map<string,string>&settings){
    //setup(float w, float h, float x, float y) {
    if (DEBUG) printf("window: %f,%f %fx%f n",ofGetWidth()*ofToFloat(settings["x"]),ofGetHeight()*ofToFloat(settings["y"]),ofGetWidth()*ofToFloat(settings["w"]),ofGetHeight()*ofToFloat(settings["h"]));
	window=ofRectangle(ofGetWidth()*ofToFloat(settings["x"]),ofGetHeight()*ofToFloat(settings["y"]),ofGetWidth()*ofToFloat(settings["w"]),ofGetHeight()*ofToFloat(settings["h"]));
	distortFactor=ofToFloat(settings["distort"]);
	renderFBO.allocate(window.width,window.height,GL_RGB);

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

	vars=new keyVar[8];

	vars[0].set('w','s',17.25,0.5,1.0,3.0);
	vars[1].set('g','d',0.0,10,1.0,3.0);
	vars[2].set('r','v',112,10,1.0,3.0);
	vars[3].set('t','c',0.0,10,1.0,3.0);
	vars[4].set('u','n',0.0,10,1.0,3.0);
	vars[5].set('j','h',0.0,10,1.0,3.0);
	vars[6].set('o','l',1000.0,10,1.0,3.0);
	vars[7].set('q','a',0,.000001,1.0,3.0);

	light.enable();
	light.setDirectional();
}
double viewpoint::getSetting(const string& setting){
    if (setting=="x") return window.x/ofGetWidth();
    if (setting=="y") return window.y/ofGetHeight();
    if (setting=="w") return window.width/ofGetWidth();
    if (setting=="h") return window.height/ofGetHeight();
    if (setting=="distort") return distortFactor;
}
//--------------------------------------------------------------
void viewpoint::setLight(){
	target.setPosition(vars[1].getVal(),vars[2].getVal(),vars[3].getVal());
	camera.orbit(vars[5].getVal(), vars[4].getVal(), vars[6].getVal(), target);
	camera.lookAt(target,ofVec3f(0,1,0));
	light.setPosition(camera.getGlobalPosition());
}
//--------------------------------------------------------------
void viewpoint::begin(){
	renderFBO.begin();
	ofClear(0,0,0);

	camera.begin();
	camera.setFov(vars[0].getVal());
}
//--------------------------------------------------------------
void viewpoint::end(){
	camera.end();

	renderFBO.end();

	ofPushMatrix();

	bindTexture(renderFBO);
	ofNoFill();
	ofSetLineWidth(1.0);
	//ofSetColor(I_fade1,I_fade1,I_fade1);
	int gridX=50;
	int gridY=50;
	int xStep=window.width/2;
	int yStep=window.height/2;
	ofTranslate(window.x+xStep,window.y+yStep);

	//todo: distort texcoords instead of vertex coords
	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), window.x+10, window.y+window.height-30);
	ofDrawBitmapString("light: "+ofToString(light.getX(), 2)+","+ofToString(light.getY(), 2)+","+ofToString(light.getZ(), 2), window.x+10, window.y+window.height-18);
}
//--------------------------------------------------------------
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);
}