Is it possible to get camera position...or is this a totally wrong approach?

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Is it possible to get camera position...or is this a totally wrong approach?

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Started 2 years ago by Tim
Latest reply from Tim

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Tim
Member

I see plenty of references to set the camera position but can't seem to locate anything that discusses how to get the info. I'm doing a side scroller with parallax and wanted to do a repeating background...but would like to know my position so as to trigger the addition of other backgrounds/sprites. Right now I'm adding content on a timing basis but would like to be more accurate and was thinking camera would tell me where in the world I am.

I've seen discussion re: repeating backgrounds but really need to know where I'm at to trigger other actions. BTW, I'm not using a tilemap since the backgrounds are essentially static and large (maybe I should just use tilemap so that I can track via tiles?).

Thanks guys.

Posted 2 years ago #

argv0
Member

We're doing probably the exact same thing in our game, as the player moves we move the camera to follow him.

In our game the camera always moves horizontally, never vertically, so the code we use to update the camera looks like this

// compute the player's new position
	[player update: t];

	// update the camera position **AFTER THE PLAYER**
	Camera * c = camera; // inherited from parent
	// get the camera position
	float x, y, z;
	[c centerX:&x centerY:&y centerZ:&z];

	// dx is the amount the camera moved by - can use later to update world
	float dx = 0.0f;

	// only if the player is moving
	if (player.currSpeed.x > 1.0 && !player.dead){
		// ** out camera is always 90px to the right of the player **
		dx = player.position.x + 90.0f - cameraFocalPoint.x;
		cameraFocalPoint.x = player.position.x + 90.0f;
	}

	// set the new camera position
	[c setCenterX:cameraFocalPoint.x centerY:cameraFocalPoint.y centerZ:0.0];
	[c setEyeX:cameraFocalPoint.x eyeY:cameraFocalPoint.y eyeZ:[Camera getZEye]];

That works perfect for us, i hope there's something in there that helps you.

Posted 2 years ago #

Tim
Member

Thanks for taking the time to respond. It looks like for what I was trying with the scrolling parallax (independent of player movement) this doesn't return the values I thought it might. But none the less this is very useful so again, appreciate the response!

Posted 2 years ago #

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