cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   mrTortex
   Member

   Hello.

   This simple thing is proving tricky. I have a camera which follows a Chipmunk player object. However, it current'y follows it in X and Y, whereas I just want it to follow in X. I want a certain degree of side scrolling, vertical scrolling should be zero. My reason for using the camera is because I have a lot of physics shapes in my layers and it makes more sense to me to move the camera and not the static shapes.

   Current code:
   

   float cameraX, cameraY, cameraZ;
   
   	[gameLayer.camera centerX:&cameraX centerY:&cameraY centerZ:&cameraZ];
   
   	[gameLayer.camera setCenterX:_landerBodyS.position.x-80 centerY:cameraY centerZ:0];
   	[gameLayer.camera setEyeX:_landerBodyS.position.x-80 eyeY:_landerBodyS.position.y+80 eyeZ:415];

   Posted 1 year ago #
2. 

   mrTortex
   Member

   Ignore me, I was being incredibly stupid. :)

   Working code for future ref:
   

   float cameraX, cameraY, cameraZ;
   
   	[gameLayer.camera centerX:&cameraX centerY:&cameraY centerZ:&cameraZ];
   
   	[gameLayer.camera setCenterX:_landerBodyS.position.x-80 centerY:160 centerZ:0];
   	[gameLayer.camera setEyeX:_landerBodyS.position.x-80 eyeY:160 eyeZ:415];

   Posted 1 year ago #
3. 

   mrTortex
   Member

   However, one question: how to work out the correct value of both Z values to have the camera in the middle of the scene? I've tried splitting the scene dimensions in 2 and passing that in, but then the camera sits very high.

   Posted 1 year ago #
4. 

   paris18m
   Member

   What does z do? Why don't you get the default values for camera center and eye and just change X? That's what I do and it works

   float moveX = 0.0f, x1, x2, y1, y2, z1, z2;
   [background.camera centerX:&x1 centerY:&y1 centerZ:&z1];
   [background.camera eyeX:&x2 eyeY:&y2 eyeZ:&z2];

   [background.camera setCenterX:moveX centerY:y1-(winSize.height/2) centerZ:z1];
   [background.camera setEyeX:x2 eyeY:y2-(winSize.height/2) eyeZ:z2];

   Posted 1 year ago #

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