vertices smaller than sprite when rendered on iPhone screen - cocos2d-iphone

Question

I am using vertex helper to get the edges of my sprites. I am using Cocos2d + Box2d on the iPhone. The problem I am getting is that the debug draw on the device I am testing on comes up but the vertices rendered or shown is smaller than my sprites even after tracing the edges of the sprites carefully and using the same sprite.
OK here is a screen shot of the problem!
The green triangle is supposed to fit with the edges of the sprite. Also this is the code I used:
This is the GLESDebugDraw code
- (void)setupDebugDraw {
debugDraw = new GLESDebugDraw(PTM_RATIO* [[CCDirector sharedDirector]
contentScaleFactor]);
world->SetDebugDraw(debugDraw);
debugDraw->SetFlags(b2DebugDraw::e_shapeBit);
}
#import "Box2DSprite.h"
#interface Stalag :Box2DSprite {
b2World *world;
}
- (id)initWithWorld:(b2World *)world atLocation:(CGPoint)location;
#end
#import "Stalag.h"
#implementation Stalag
- (void)createBodyAtLocation:(CGPoint)location {
b2BodyDef bodyDef;
bodyDef.type = b2_staticBody;
bodyDef.position = b2Vec2(location.x/PTM_RATIO,
location.y/PTM_RATIO);
self.body = world->CreateBody(&bodyDef);
body->SetUserData(self);
b2PolygonShape shape;
int num = 8;
b2Vec2 verts[] = {
b2Vec2(36.8f / 100.0, -79.2f / 100.0),
b2Vec2(10.3f / 100.0, 33.2f / 100.0),
b2Vec2(1.8f / 100.0, 80.6f / 100.0),
b2Vec2(-4.6f / 100.0, 84.5f / 100.0),
b2Vec2(-8.5f / 100.0, 80.3f / 100.0),
b2Vec2(-22.6f / 100.0, 19.4f / 100.0),
b2Vec2(-31.8f / 100.0, -45.6f / 100.0),
b2Vec2(-37.5f / 100.0, -75.7f / 100.0)
};
shape.Set(verts, num);
b2FixtureDef fixtureDef;
fixtureDef.shape = &shape;
fixtureDef.density = 1000.0;
body->CreateFixture(&fixtureDef);
}
- (id)initWithWorld:(b2World *)theWorld atLocation:(CGPoint)location {
if ((self = [super init])) {
world = theWorld;
[self setDisplayFrame:[[CCSpriteFrameCache
sharedSpriteFrameCache] spriteFrameByName:#"hill.png"]];
gameObjectType = kStalagupType;
[self createBodyAtLocation:location];
}
return self;
}
#end
Please can anyone tell me what do I do and what I am doing wrong?
Thanks

Answer 1

When specifying vertices coordinates you are dividing it by a "magic number" 100. Actually it is your PixelToMetersRatio (PTM_RATIO in cocos examples). Also you are using box2d debug draw. And when creating debug draw class your must pass PTM_RATIO in it's constructor. I think you are passing another number there (not 100). Does it solve the problem ?