Needing help for camera rotation in 3D with rotateY

Processing Coding Questions
1

Hello, I already asked a question about turning the movement direction withmovingthe mouse in3D.
It was successfully answered.
However, now I want to turn the camera as well.
<
void kamera()
{
camera(xCam,yCam,zCam,xPos,yPos,zPos,0,1,1);
xCam=xPos;
yCam=yPos;
zCam=zPos+200;
if(mousey>0||mousey<0)
{

beginCamera();
camera(xCam,yCam,zCam,xPos,yPos,zPos,0,1,1);
rotateY(mousey);
endCamera();

}

if(cam>0)
{
  xCam=xPos;
  yCam=yPos;
  zCam=zPos+10;
}

}

As you can see, I tried it with beginCamera(). “mousey” is a variable that is programmed in that way:
<
if(mouseX<650)
{mousey=-(-mouseX+650)*0.01;}
if(mouseX>650)
{mousey=(mouseX-650)*0.01;}

Because of your help, I could already change the movement directions with mousey. Now I also want to change the camera, but it’s always moving wrong, it is moving, but it’s moving like the Y axis is a little bit moved away from the figur.

2

Solved it!
This is the code:
The main programm ( you can find the camera instructions in the class programm, which comes after this):

Figur figur1;
void setup()
{
  size(1300,750,P3D);
  figur1=new Figur(650,375,0,0,0,0);
}
void draw()
{
  //println(mousey);
  background(#FFFFFF);
  lights();
}
void keyPressed()
{
  figur1.pressedkeys();
}
void keyReleased()
{
  figur1.releasedkeys();
}
void mouseMoved()
{
  figur1.movedmouse();
}

Here’s the figurClass:

float a1=0;
float b1=0;
float c1=0;
float mousey=0;
float cam=0;
float camdist=200;
class Figur
{
  float xPos;
  float yPos;
  float zPos;
  float xCam;
  float yCam;
  float zCam;
  Figur(float x,float y,float z,float v,float b,float n)
  {
    xPos=x;
    yPos=y;
    zPos=z;
    xCam=v;
    yCam=b;
    zCam=n;
  }
  void drawFigur()
  {
    pushMatrix();
    fill(#0000FF);
    translate(xPos,yPos,zPos);
    rotateY(mousey);
    sphere(20);
    popMatrix();
    pushMatrix();
    translate(xPos,yPos+50,zPos);
    rotateY(mousey);
    box(15,60,15);
    popMatrix();
  }
  void pressedkeys()
  {
    if(key=='w')
    {c1=-5;}
    if(key=='s')
    {c1=5;}
    if(key=='c')
    {cam=5;}
    if(key=='a')
    {b1=-5;}
    if(key=='d')
    {b1=5;}
  }
  void releasedkeys()
  {
    if(key=='w')
    {c1=0;}
    if(key=='s')
    {c1=0;}
    if(key=='c')
    {cam=0;}
    if(key=='a')
    {b1=0;}
    if(key=='d')
    {b1=0;}
  }
  void movedmouse()
  {
    if(mouseX<650)
    {mousey=-(-mouseX+650)*0.01;}
    if(mouseX>650)
    {mousey=(mouseX-650)*0.01;}
   
  }
  void moveFigur()
  {
    if(c1>0)
    { 
      xPos=sin(mousey)*c1+xPos;
      zPos=cos(mousey)*c1+zPos;
    }
    if(c1<0)
    { 
      xPos=sin(mousey)*c1+xPos;
      zPos=cos(mousey)*c1+zPos;
    }
    if(b1>0)
    {
      xPos=cos(mousey)*b1+xPos;
      zPos=sin(mousey)*b1+zPos;
    }
    if(b1<0)
    {
      xPos=cos(mousey)*b1+xPos;
      zPos=sin(mousey)*b1+zPos;
    }
  }
  void kamera()
  {
    translate(xPos,zPos);
    xCam=(cos(mousey)*camdist)+xPos;
    yCam=yPos;
    zCam=(sin(mousey)*camdist)+zPos;
    camera(xCam,yCam,zCam,xPos,yPos,zPos,0,1,0);
  if(cam>0)
    {
     camdist=10;
    }
    if(cam==0)
    {
      camdist=200;
    }
  }
}

I’m so happy! Thank you Chrisir! It was your coding solution that brought me to this idea! Thank you all so much. The movement is a little bit twisted at the moment, but the camera works how it should. That was my goal. Thank you all so much!!! :star_struck:

1 Like