Rotate on Command

Processing Coding Questions
15

I have taken your idea and used the rotation code bits to rotate the cube along the Y axis as well as the X axis originally.

boolean rotateU=false;
boolean rotateD=false;
boolean rotateL=false;
boolean rotateR=false;
float angleX=0;
float angleY=0;
float anglechgU=HALF_PI/60;
float anglechgD=HALF_PI/60;
float anglechgL=HALF_PI/60;
float anglechgR=HALF_PI/60;
float max1Add=HALF_PI;
float max2Add=HALF_PI;
float max1=max1Add;
float max2=max2Add;
void setup(){
  size(1000,1000,P3D);
  noFill();
  stroke(255);
  println("press w to rotate ");
}
void draw(){
  background(0);
  fill(255);
  text("Use w to rotate Up",19,19);
  text("Use s to rotate Down",19,38);
  text("Use a to rotate Left",19,57);
  text("Use d to rotate Right",19,76);
  lights(); 
  translate(width/2,height/2);
  rotateX(angleX);
  if(rotateU){
    angleX+=anglechgU;
    if(angleX>=max1){
      anglechgU=0;
      rotateU=false;
      max1+=max1Add;
    }
  }
  if(rotateD){
    angleX-=anglechgD;
    if(angleX<=max1){
      anglechgD=0;
      rotateD=false;
      max1-=max1Add;
    }
  }
  rotateY(angleY);
  if(rotateL){
    angleY-=anglechgL;
    if(angleY<=max2){
      anglechgL=0;
      rotateL=false;
      max2-=max2Add;
    }
  }
  if(rotateR){
    angleY+=anglechgR;
    if(angleY>=max2){
      anglechgR=0;
      rotateR=false;
      max2+=max2Add;
    }
  }
  fill(255,0,0); 
  box(500);
  println("X angle=",angleX);
  println("Y angle=",angleY);
}
void keyPressed(){
  if(key=='w'){
    rotateU=true;
    anglechgU=HALF_PI/60;
  }
  if(key=='s'){
    rotateD=true;
    anglechgD=HALF_PI/60;
  }
  if(key=='a'){
    rotateL=true;
    anglechgL=HALF_PI/60;
  }
  if(key=='d'){
    rotateR=true;
    anglechgR=HALF_PI/60;
  }
}

I think that I will need to create some vectors for the rotation code, because when I rotate the cube in the desired direction, for example, rotate it upward 90 deg/.5 pi, it seems that the entire dimensional plane moves around with it, because after the X rotation is finished, and if I rotate it to the right by pressing d, it seems like the cube rotates along its Z axis. In fact, it is actually rotating along the angleY variable with the rotateY bit I put in there. The two println functions in there were used to prove this.

1 Like