import peasy.*;
PeasyCam cam;
int cols, rows, s;
int w,h;
float t=0, vt=0.01; // t and speed of t
float xoffInit=0, vXoffInit=0.01; // xoffInit and speed of xoffInit
float inc=0.025; // increment of noise()
boolean showGrid=false;
boolean showMessage=false; // show message depending on position
float xMessage, yMessage, zMessage;
color greenLight=color(50,150,50);
color greenDark=color(10,50,10);
color white=color(255);
color cyan=color(0,90,90);
color blue=color(0,0,70);
void setup(){
size(600,600,P3D);
s=5;
w=800;
h=800;
cols=w/s;
rows=h/s;
cam=new PeasyCam(this,400,400,200,700);
}
void draw(){
lights();
background(blue);
pushMatrix();
translate(0,height*0.3,-100);
rotateX(PI/3);
if (showGrid){
stroke(100); noFill();
} else {
noStroke();
}
xoffInit+=vXoffInit;
float yoff=t;
//show a message at location t=0 and xOffInit=0
if (t>=-rows*inc && t<=0 && xoffInit>=-cols*inc && xoffInit<=0){
//rows*inc and cols*inc is 4 now
showMessage=true;
} else {
showMessage=false;
}
for (int y=0;y<rows;y++){
beginShape(TRIANGLE_STRIP);
float xoff=xoffInit;
for (int x=0;x<cols;x++){
// computes the height (z and z2)
float z=map(noise(xoff,yoff),0,1,-100,100);
yoff+=inc;
float z2=map(noise(xoff,yoff),0,1,-100,100);
yoff-=inc;
// define fill color based on z value
if (showGrid==false){
// change Hue value of greenDark and greenLight (0 until same color)
// based on noise() using xoff and yoff
colorMode(HSB);
float n=noise(xoff+1,yoff+1);
float hueGD=map(n,0,1,0,hue(greenDark)*2);
float hueGL=map(n,0,1,0,hue(greenLight)*2);
color gd=color(constrain(hueGD,0,hue(greenDark)),saturation(greenDark),brightness(greenDark));
color gl=color(constrain(hueGL,0,hue(greenDark)),saturation(greenLight),brightness(greenLight));
colorMode(RGB);
if (z>25){ // snow (color from white to greenLight)
fill(lerpColor(gl,white,map(z,25,40,0,1)));
} else if (z>-25){ // forest (greenLight to greenDark)
fill(lerpColor(gd,gl,map(z,-25,25,0,1)));
} else if (z>-40){ // forest (green dark)
fill(gd);
}else { // lake (cyan) flat (force z=-40)
z=-40;
z2=-40;
fill(cyan);
}
}
vertex(x*s,y*s,z);
vertex(x*s,(y+1)*s,z2);
xoff+=inc;
if (showMessage){
if (int(xoff*100.0)==0 && int(yoff*100.0)==0){
xMessage=x*s;
yMessage=y*s;
zMessage=100;
}
}
}
yoff+=inc;
endShape();
}
t-=vt;
// show Message
if (showMessage){
fill(255,0,0);
pushMatrix();
translate(xMessage,yMessage,zMessage);
stroke(255,0,0);
line(0,0,0,0,0,-200);
rotateX(-PI/4);
textSize(20);
text("rogerio.bego@hotmail.com",0,0);
popMatrix();
}
popMatrix();
// information
fill(255,0,0);
textSize(30);
text("t="+nf(t,1,2),10,30);
text("xoffInit="+nf(xoffInit,1,2),10,60);
text("press arrow keys or space",width*0.6,30);
text("or pgUp / pgDown",width*0.6,60);
text("or drag mouse buttons",width*0.6,90);
}
void keyPressed(){
if (key==CODED){
if (keyCode==UP){
vt+=0.01;
} else if (keyCode==DOWN){
vt-=0.01;
} else if (keyCode==LEFT){
vXoffInit-=0.01;
} else if (keyCode==RIGHT){
vXoffInit+=0.01;
}
} else if (keyCode==16){ // pgup
inc+=0.001;
} else if (keyCode==11){ // pgdown
inc-=0.001;
} else if (key==' '){ // space bar showGrid ON/OFF
showGrid=!showGrid;
}
}
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