cocos2d for iPhone

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

1. 

   rbrooky
   Member

   Let me start by saying how happy I am that I found Cocos2d for the iPhone! It really helped my little game progress a lot.

   I'm only a hobbyist developer so I still get stuck from time to time. Picture this scene: a street view from the front with a character walking towards the you. This would mean you have buildings and scenery at both sides of the screen that scroll towards the back while the character is walking towards you. No I have an idea of how to set this up but I'm not sure how to set it up and how to make it work properly.
   The idea is:
   - create a Layer for each side of the screen, let's take the left side as an example
   - create a scrolling animation of the background images that I would like to show here, scrolling from left to right
   - then use OrbitCamera to create an OpenGL Z-vertex effect (like in the AtlasSpriteTest demo) to create the 3D effect and lock it at the right angle.

   Main questions are, would this be a good idea (If not any other ideas?)? And how can I create a static angle so that the buildings on side have the right perspective?

   The following line animates it but I don't want anymation, just an angled view.
   [self runAction:[OrbitCamera actionWithDuration:10 radius: 1 deltaRadius:0 angleZ:0 deltaAngleZ:360 angleX:0 deltaAngleX:0]];

   Any help would be greatly appreciated!

   Thanks

   Posted 2 years ago #
2. 

   cacaty
   Member

   try this patch and do 3d rotation like this:

   floor.rotationX = 90;
   wall.rotationY = 45;

   call this befor attach
   [[Director sharedDirector] setDepthBufferFormat: kDepthBuffer16];

   [code]
   diff --git a/Support/cocos2d/CocosNode.h b/Support/cocos2d/CocosNode.h
   index 489e7fc..3ce9173 100644
   --- a/Support/cocos2d/CocosNode.h
   +++ b/Support/cocos2d/CocosNode.h
   @@ -60,8 +60,8 @@ enum {
   @interface CocosNode : NSObject {

   // rotation angle
   - float rotation;
   -
   + float rotation, rotationX, rotationY;
   +
   // scale X factor
   float scaleX;

   @@ -121,7 +121,7 @@ enum {
   /** The z order of the node relative to it's "brothers": children of the same parent */
   @property(readonly) int zOrder;
   /** The rotation (angle) of the node in degrees. 0 is the default rotation angle */
   -@property(readwrite,assign) float rotation;
   +@property(readwrite,assign) float rotation, rotationX, rotationY;
   /** The scale factor of the node. 1.0 is the default scale factor */
   @property(readwrite,assign) float scale, scaleX, scaleY;
   /** The parallax ratio of the node. 1.0 is the default ratio */
   diff --git a/Support/cocos2d/CocosNode.m b/Support/cocos2d/CocosNode.m
   index 970387b..8da4d4f 100644
   --- a/Support/cocos2d/CocosNode.m
   +++ b/Support/cocos2d/CocosNode.m
   @@ -47,7 +47,7 @@

   @implementation CocosNode

   -@synthesize rotation, scaleX, scaleY, position, parallaxRatioX, parallaxRatioY;
   +@synthesize rotation, rotationX, rotationY, scaleX, scaleY, position, parallaxRatioX, parallaxRatioY;
   @synthesize visible;
   @synthesize transformAnchor, relativeTransformAnchor;
   @synthesize parent, children;
   @@ -70,6 +70,7 @@
   position = CGPointZero;

   rotation = 0.0f; // 0 degrees
   + rotationX = rotationY = 0.0f;
   scaleX = 1.0f; // scale factor
   scaleY = 1.0f;
   parallaxRatioX = 1.0f;
   @@ -477,6 +478,10 @@
   // rotate
   if (rotation != 0.0f )
   glRotatef( -rotation, 0.0f, 0.0f, 1.0f );
   + if (rotationX != 0.0f )
   + glRotatef( rotationX, 1.0f, 0.0f, 0.0f );
   + if (rotationY != 0.0f )
   + glRotatef( rotationY, 0.0f, 1.0f, 0.0f );

   // scale
   if (scaleX != 1.0f || scaleY != 1.0f)

   [/code]

   Posted 2 years ago #
3. 

   rbrooky
   Member

   Thanks a million, cacaty! The patch works just great after a few minor change and after adding two functions to CocosNode.m since V0.8 is a bit different.

   Posted 2 years ago #

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