axmol/cocos2dx/actions/CCActionCamera.cpp

/****************************************************************************
Copyright (c) 2010 cocos2d-x.org

http://www.cocos2d-x.org

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****************************************************************************/
#include "CCActionCamera.h"
#include "CCNode.h"
#include "CCCamera.h"
#include "CCStdC.h"

namespace cocos2d{
	//
	// CameraAction
	//
	void CCActionCamera::startWithTarget(CCNode *pTarget)
	{
		CCActionInterval::startWithTarget(pTarget);
		
		CCCamera *camera = pTarget->getCamera();
		camera->getCenterXYZ(&m_fCenterXOrig, &m_fCenterYOrig, &m_fCenterZOrig);
		camera->getEyeXYZ(&m_fEyeXOrig, &m_fEyeYOrig, &m_fEyeZOrig);
		camera->getUpXYZ(&m_fUpXOrig, &m_fUpYOrig, &m_fUpZOrig);
	}
	
	CCActionInterval * CCActionCamera::reverse()
	{
		return CCReverseTime::actionWithAction(this);
	}
	//
	// CCOrbitCamera
	//
	CCOrbitCamera * CCOrbitCamera::actionWithDuration(float t, float radius, float deltaRadius, float angleZ, float deltaAngleZ, float angleX, float deltaAngleX)
	{
		CCOrbitCamera * pRet = new CCOrbitCamera();
		if(pRet->initWithDuration(t, radius, deltaRadius, angleZ, deltaAngleZ, angleX, deltaAngleX))
		{
			pRet->autorelease();
			return pRet;
		}
		CC_SAFE_DELETE(pRet);
		return NULL;
	}

	CCObject * CCOrbitCamera::copyWithZone(CCZone *pZone)
	{
		CCZone* pNewZone = NULL;
		CCOrbitCamera* pRet = NULL;
		if(pZone && pZone->m_pCopyObject) //in case of being called at sub class
			pRet = (CCOrbitCamera*)(pZone->m_pCopyObject);
		else
		{
			pRet = new CCOrbitCamera();
			pZone = pNewZone = new CCZone(pRet);
		}

		CCActionInterval::copyWithZone(pZone);

		pRet->initWithDuration(m_fDuration, m_fRadius, m_fDeltaRadius, m_fAngleZ, m_fDeltaAngleZ, m_fAngleX, m_fDeltaAngleX);

		CC_SAFE_DELETE(pNewZone);
		return pRet;
	}

	bool CCOrbitCamera::initWithDuration(float t, float radius, float deltaRadius, float angleZ, float deltaAngleZ, float angleX, float deltaAngleX)
	{
		if ( CCActionInterval::initWithDuration(t) )
		{
			m_fRadius = radius;
			m_fDeltaRadius = deltaRadius;
			m_fAngleZ = angleZ;
			m_fDeltaAngleZ = deltaAngleZ;
			m_fAngleX = angleX;
			m_fDeltaAngleX = deltaAngleX;

			m_fRadDeltaZ = (CGFloat)CC_DEGREES_TO_RADIANS(deltaAngleZ);
			m_fRadDeltaX = (CGFloat)CC_DEGREES_TO_RADIANS(deltaAngleX);
			return true;
		}
		return false;
	}

	void CCOrbitCamera::startWithTarget(CCNode *pTarget)
	{
		CCActionInterval::startWithTarget(pTarget);
		float r, zenith, azimuth;
		this->sphericalRadius(&r, &zenith, &azimuth);
		if( isnan(m_fRadius) )
			m_fRadius = r;
		if( isnan(m_fAngleZ) )
			m_fAngleZ = (CGFloat)CC_RADIANS_TO_DEGREES(zenith);
		if( isnan(m_fAngleX) )
			m_fAngleX = (CGFloat)CC_RADIANS_TO_DEGREES(azimuth);

		m_fRadZ = (CGFloat)CC_DEGREES_TO_RADIANS(m_fAngleZ);
		m_fRadX = (CGFloat)CC_DEGREES_TO_RADIANS(m_fAngleX);
	}

	void CCOrbitCamera::update(ccTime dt)
	{
		float r = (m_fRadius + m_fDeltaRadius * dt) * CCCamera::getZEye();
		float za = m_fRadZ + m_fRadDeltaZ * dt;
		float xa = m_fRadX + m_fRadDeltaX * dt;

		float i = sinf(za) * cosf(xa) * r + m_fCenterXOrig;
		float j = sinf(za) * sinf(xa) * r + m_fCenterYOrig;
		float k = cosf(za) * r + m_fCenterZOrig;

		m_pTarget->getCamera()->setEyeXYZ(i,j,k);
	}

	void CCOrbitCamera::sphericalRadius(float *newRadius, float *zenith, float *azimuth)
	{
		float ex, ey, ez, cx, cy, cz, x, y, z;
		float r; // radius
		float s;

		CCCamera* pCamera = m_pTarget->getCamera();
		pCamera->getEyeXYZ(&ex, &ey, &ez);
		pCamera->getCenterXYZ(&cx, &cy, &cz);

		x = ex-cx;
		y = ey-cy;
		z = ez-cz;

		r = sqrtf( powf(x,2) + powf(y,2) + powf(z,2));
		s = sqrtf( powf(x,2) + powf(y,2));
		if( s == 0.0f )
			s = FLT_EPSILON;
		if(r==0.0f)
			r = FLT_EPSILON;

		*zenith = acosf( z/r);
		if( x < 0 )
			*azimuth= (CGFloat)M_PI - asinf(y/s);
		else
			*azimuth = asinf(y/s);

		*newRadius = r / CCCamera::getZEye();				
	}
} // namespace cocos2d