Well, the Subject says all. I want to set a pivot point to the camera, I want to move the camera on cirlces with the centrer placed on another place, like moving on the perimeter of a cirlce. How can I do that.
cameraHeight - how far the camera is
cameraZAngle - increase/decrease to move around the object
cameraXAngle - increase / decrease to look up/down
SimpleVector pos = new SimpleVector(myCenter);
pos.z += cameraHeight;
float cameraZAngle = this.cameraZAngle;
//place camera
SimpleVector y = new SimpleVector(0, cameraHeight / 2.5, 0);
y.rotateZ(cameraZAngle);
pos.add(y);
//rotate camera
camera.getBack().setIdentity();
camera.rotateZ(cameraZAngle);
camera.rotateY((-(float) Math.PI));
camera.rotateX(cameraXAngle);
//check placement boundaries here
camera.setPosition(pos);
Hi, I tried to do it by myself not even loking your way, and it works bad. It only turns the half before returning to the initial point. I am managing the angle on the arc rotation. I left my code here for help.
r=radius
teta=angle
derecha=right
The problem is that between -90 and 90º, it works well, but when it must go up from 90º it returns to -90. Its a trigonometric problem. But I dont know how to do it. I will try rolz way but I really will apreciate a help for this.
if (derecha) {
Camera temp=mundo.getCamera ();
float x=0;
float z=0;
float r;
float tempx;
float tempz;
float teta;
tempx=temp.getPosition ().x;
tempz=temp.getPosition ().z;
teta=(float) Math.atan(tempz/tempx);
r=(float) Math.sqrt (tempx*tempx+tempz*tempz+temp.getPosition ().y*temp.getPosition ().y);
//System.out.println (""+teta*180/3.14159256);
x=(float) (r/Math.sqrt(1+Math.pow (Math.tan(teta+0.02), 2)));
z=(float) (x*Math.tan (teta+0.02));
mundo.getCamera ().setPosition (x, temp.getPosition ().y, z);
mundo.getCamera ().lookAt (new SimpleVector (0, 0, 0));
}
I dont understand rolz answer, My programming skills are not good enough. What does the getBack method???
and the setIdentity one?
I find a easy way any way, I will place the camera on the center of the object and after that I will rotateY, later I will move out the radius distance.
!!!!!!! it was so easy, the problem was that I was trying to discover the warm water again, I mean that I wasnt using things already implementes on the engine like the lenght () method.
Now I post the code for turnig left and right using the (0, 0, 0) as pivot center.
public void rotateLeft () {
Camera temp=mundo.getCamera ();
float radio=temp.getPosition ().length ();
temp.setPosition (0, 0, 0);
temp.rotateY (-0.02f);
temp.moveCamera (Camera.CAMERA_MOVEOUT, radio);
}
public void rotateRight () {
Camera temp=mundo.getCamera ();
float radio=temp.getPosition ().length ();
temp.setPosition (0, 0, 0);
temp.rotateY (0.02f);
temp.moveCamera (Camera.CAMERA_MOVEOUT, radio);
}
I hope that someone finds this helpfull.