//created=13 Nov 07
//description=Simple 3D scene creation
//title=Lightmap Baking
//publish=false
//titlebar=Lightmap Generation Tutorial
 
import SGCamera.*;
import Raytracing.*;
import Tuple.*;
 
SGCamera cam; 
Raytracer tracer;
 
//movement vector "in character space"
float dx = 0,dy = 0, dz = 0;
 
PImage [] pix = new PImage[11];
PImage [] maps = new PImage[5];
int level = 0;
boolean jetpack = false;
int nextImg = 0;
int nextPort = 0;
int numImgs = 10;
void setup(){
 
  size(550,450,P3D);
  cam = new SGCamera(this,-50,-80,-100,0,0,0, SGCamera.MOUSELOOK, SGCamera.MOVE);
  tracer = new Raytracer(this);
 
  frameRate(30);
  tracer.openFile("thing.mra",cam);
 
  
 
  cam.fov = 1.5;
 
 
 
}
 
public void draw(){
  background(220,220,255);
  lights();
  cam.feed();
  tracer.draw();
 
  //each time step, shoot a ray downward to make sure the camera is at the right height
  Ray down = new Ray(cam.pos,new Tuple3f(0,1,0));
  //RenderState down = new RenderState(feet);
  tracer.accelerator.findNearest(down);
  if (down.occluder != null){
    float eyeheight = 100;
    if (jetpack){
      dz -= 1.2f;
      cam.translate(random(-1.5,1.5),dz + random(0,2),random(-1.5,1.5));
    }
    if (down.distance > eyeheight){
      //accelerate
      dz += .98;
      cam.translate(0,dz,0);
    }
    else if (down.distance < eyeheight){
      cam.translate(0,-(eyeheight-down.distance)/2.f,0);
      dz = 0;  
    }
 
  }
  
  //println(cam.pos.x + ":" + cam.pos.y);
  //check if we are up against a wall
  Tuple3f direction = null;
  if (dx > 0) direction = cam.forward.getCopy();
  else if (dx < 0) direction = cam.forward.times(-1.f);
  
  if (dy !=0 && direction == null) direction = new Tuple3f();
  
  if (dy > 0) direction.plusEquals(cam.right);
  else if (dy < 0) direction.plusEquals(cam.right.times(-1.f));
  
  if (direction != null){
    
    direction.timesEquals(20);
    Tuple3f bodypoint = cam.pos.getCopy();
    bodypoint.y += 30.f;
    direction.y = 0;
    down = new Ray(bodypoint,direction);
    //down = new RenderState(feet);
    down.maxDist = 100.f;
    tracer.accelerator.findNearest(down);
    if (down.occluder == null){             
      cam.translate(direction.x, direction.y,direction.z);
    }
       
  }
 
 
 
  
 
}
public void keyPressed(){
  if (key == 'w' ){
    dx = 20;
  }
  else if (key == 's' ){
    dx = -20;
  }
  if (key == 'd' ){
    dy = 20;
  }
  else if (key == 'a' ){
    dy = -20;
  }
  else if (key == 'q'){
    if (dz == 0){
      dz -= 10.f;
      cam.translate(0,dz,0); //this dz is character space, not worldspace
    }
  }
 
  else if (key == 'e'){
    cam.fov -= .2;
  }
  else if (key == 'c'){
    cam.fov += .2;
  }
  cam.fov = constrain(cam.fov,.6,2.8);
}
 
public void keyReleased(){
  if (key == 'w' || key == 's') dx = 0;
  if (key == 'a' || key == 'd') dy = 0;
 
}
 
 
 
 
void mousePressed(){
  if (mouseButton == RIGHT) jetpack = true;
}
void mouseReleased(){
  if (mouseButton == RIGHT) jetpack = false;
}