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  Maths Question - move camera based on mouse distance from centre  (Read 579 times)
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Offline dime26

Senior Member


Medals: 2
Projects: 3
Exp: 5 years


Should traffic wardens be armed?


« Posted 2013-04-10 23:18:37 »

I have implemented a feature that moves the screen/camera towards the direction the mouse is facing, so that you see more of what is in front of you, I have uploaded a movie showing the affect.

My code is awful though and I would rather not paste it Sad I basically check where the mouse is and move the camera until it is X pixels from the center.

What I would like is for the screen to peak forward relevant to how far you move the mouse from the character. I have seen this affect in a few games and wonder if there are any code examples be it Java or Pseudo.

Poor mans version:

<a href="http://www.youtube.com/v/IGeyGHRv2nM?version=3&amp;hl=en_US&amp;start=" target="_blank">http://www.youtube.com/v/IGeyGHRv2nM?version=3&amp;hl=en_US&amp;start=</a>

Thank you
Offline dime26

Senior Member


Medals: 2
Projects: 3
Exp: 5 years


Should traffic wardens be armed?


« Reply #1 - Posted 2013-04-11 00:18:11 »

This gives me the x and y distance from the center of the screen. but keeps on moving away from Character, do I just set a max distance from the Character?

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public void position_by_facing(){
  tmp.set(0, 0, 0);
  this.getCam().unproject(tmp);
     
  mouse_offset_x = renderer.getMouse_x() - (Gdx.graphics.getWidth()/2);
  mouse_offset_y = renderer.getMouse_y() - (Gdx.graphics.getHeight()/2);

  renderer.getCam().position.y -= mouse_offset_y * 0.01f;
  renderer.getCam().position.x += mouse_offset_x * 0.01f;
}


<a href="http://www.youtube.com/v/y4bZ8R9j2ng?version=3&amp;hl=en_US&amp;start=" target="_blank">http://www.youtube.com/v/y4bZ8R9j2ng?version=3&amp;hl=en_US&amp;start=</a>

Offline brollysan

Junior Member


Medals: 1



« Reply #2 - Posted 2013-04-11 11:13:36 »

Is the mouse center (0,0)? Or is the topleft corner (0,0)?
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Offline dime26

Senior Member


Medals: 2
Projects: 3
Exp: 5 years


Should traffic wardens be armed?


« Reply #3 - Posted 2013-04-11 15:17:44 »

Centre of the screen returns 0,0
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