Rotating camera to match an object about rajawali HOT 8 CLOSED

Hello

    mCamera.setPosition(0, 0, -8);
    mCamera.setLookAt(0, 0, 0);

and then...

public void onDrawFrame(GL10 glUnused) {
    super.onDrawFrame(glUnused);

    mCamera.setRotation(new Number3D(mXOffset*360, mXOffset*360, mXOffset*360));

...
...

I am trying to rotate around 0,0,0, when mXOffset changed, but nothing happened,

mXOffset has a value from 0.0 to 1.0, so not this is the probleme. (GS2)

I changed RajaWaliRenderer class to this:

public void onOffsetsChanged(float xOffset, float yOffset, float xOffsetStep, float yOffsetStep, int xPixelOffset, int yPixelOffset) {
    mXOffset=xOffset;
}

public void onTouchEvent(MotionEvent event) {
    mTouchEvent=event;
}       

to achieve that values from the renderer.

from rajawali.

By saying "rotate around 0,0,0", do you mean to move in a circle with centre at 0,0,0 ?
Just like in https://github.com/MasDennis/RajawaliExamples/blob/master/src/com/monyetmabuk/rajawali/tutorials/RajawaliCatmullRomRenderer.java
Then this example will do.

from rajawali.

Yes. But I not want cam animation. I want to rotate when the user scrolling
on the home screen pages. So camanimation not what I need. I d like to use
xOffset to control rotation...
On May 25, 2012 10:50 PM, "cforcloud" <
[email protected]>
wrote:

By saying "rotate around 0,0,0", do you mean to move in a circle with
centre at 0,0,0 ?
Just like in
https://github.com/MasDennis/RajawaliExamples/blob/master/src/com/monyetmabuk/rajawali/tutorials/RajawaliCatmullRomRenderer.java
Then this example will do.

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#25 (comment)

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Any news how to use this?:)

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Sorry, but I have a lot on my todo list. Will look at this later.

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So basically you just have to override the onOffsetsChanged() method in the Renderer class. Then multiply the xOffset by the number of degrees you want to rotate. Also make sure that the camera's lookat isn't set or else it won't rotate.
Example:

public void onOffsetsChanged(float xOffset, float yOffset, float xOffsetStep, float yOffsetStep,
int xPixelOffset, int yPixelOffset) {
mCamera.setRotY(xOffset * 10);
}


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Oh I got it, thats what I needed:

public void onOffsetsChanged(float xOffset, float yOffset, float xOffsetStep, float yOffsetStep, int xPixelOffset, int yPixelOffset) {
    //mCamera.setRotY(xOffset * 180);
    float x=(float) (10*Math.sin(Math.toRadians(xOffset*360)));
    float y=(float) (10*Math.cos(Math.toRadians(xOffset*360)));

    mCamera.setLookAt(0, 0, 0);
    mCamera.setPosition(x, 0, y);
}

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Cool, glad to hear you've solved your problem :-)

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