void VRope::createRope(cocos2d::CCPoint pointA, cocos2d::CCPoint pointB, float ropeLenght) {
float distance;
if (ropeLenght < 0) {
distance = ccpDistance(pointA,pointB);
}else{
distance = ropeLenght;
}
int segmentFactor = RopeSegmentFactor; //increase value to have less segments per rope, decrease to have more segments
numPoints = distance/segmentFactor;
mRopeLength = segmentFactor * numPoints;
CCPoint diffVector = ccpSub(pointB,pointA);
float multiplier = distance / (numPoints-1);
antiSagHack = 0.1f; //HACK: scale down rope points to cheat sag. set to 0 to disable, max suggested value 0.1
for(int i=0;i<numPoints;i++) {
CCPoint tmpVector = ccpAdd(pointA, ccpMult(ccpNormalize(diffVector),multiplier*i*(1-antiSagHack)));
VPoint* tmpPoint = new VPoint;
tmpPoint->setPos(tmpVector.x, tmpVector.y);
vPoints.insert(vPoints.end(), tmpPoint);
}
for(int i=0;i<numPoints-1;i++) {
VStick tmpStick;
tmpStick.initWith(vPoints[i], vPoints[i+1]);
vSticks.insert(vSticks.end(), tmpStick);
}
if(spriteSheet!=NULL) {
for(int i=0;i<numPoints-1;i++) {
VPoint* point1 = vSticks[i].getPointA();
VPoint* point2 = vSticks[i].getPointB();
CCPoint stickVector = ccpSub(ccp(point1->x,point1->y),ccp(point2->x,point2->y));
float stickAngle = ccpToAngle(stickVector);
CCTexture2D* texture = spriteSheet->getTexture();
RecordSprite* tmpSprite = new RecordSprite;
tmpSprite->setTag(Tag_Box_RopeBatchSprite);
tmpSprite->autorelease();
tmpSprite->initWithTexture(texture, CCRectMake(0,0,multiplier,texture->getContentSize().height));
ccTexParams params = {GL_LINEAR,GL_LINEAR,GL_REPEAT,GL_REPEAT};
tmpSprite->getTexture()->setTexParameters(¶ms);
tmpSprite->setPosition(ccpMidpoint(ccp(point1->x,point1->y),ccp(point2->x,point2->y)));
tmpSprite->setRotation(-1 * CC_RADIANS_TO_DEGREES(stickAngle));
spriteSheet->addChild(tmpSprite);
ropeSprites.insert(ropeSprites.end(), tmpSprite);
}
//// LiFeng 添加
//ropeSprites[ropeSprites.size()-1]->setOpacity(100);
}else{
CCAssert(false, "not init");
}
}
void VRope::resetWithPoints(cocos2d::CCPoint pointA, cocos2d::CCPoint pointB) {
float distance = ccpDistance(pointA,pointB);
CCPoint diffVector = ccpSub(pointB,pointA);
float multiplier = distance / (numPoints - 1);
for(int i=0;i<numPoints;i++) {
CCPoint tmpVector = ccpAdd(pointA, ccpMult(ccpNormalize(diffVector),multiplier*i*(1-antiSagHack)));
VPoint* tmpPoint = vPoints[i];
tmpPoint->setPos(tmpVector.x, tmpVector.y);
}
}
VRope* VRope::cutRopeInStick(int nPoint, VStick* stick, b2Body* newBodyA, b2Body* newBodyB) {
auto range = NSRange{nPoint, numPoints-nPoint-1};
std::vector< VStick *> newRopeSticks( vSticks.begin() + range.location, vSticks.begin() + range.location + range.length );
vSticks.erase(vSticks.begin() + range.location, vSticks.begin() + range.location + range.length);
std::vector<Sprite*> newRopeSprites(ropeSprites.begin() + range.location, ropeSprites.begin() + range.location + range.length);
ropeSprites.erase(ropeSprites.begin() + range.location, ropeSprites.begin() + range.location + range.length);
range.length += 1;
std::vector<VPoint*> newRopePoints(vPoints.begin() + range.location, vPoints.begin() + range.location + range.length);
vPoints.erase(vPoints.begin() + range.location, vPoints.begin() + range.location + range.length);
VPoint *pointOfBreak = newRopePoints.at(0);
VPoint *newPoint = new VPoint();
newPoint->setPos(pointOfBreak->x, pointOfBreak->y);
vPoints.push_back(newPoint);
VStick *lastStick = vSticks.back();
lastStick->setPointB(newPoint);
float cutRatio = (float)nPoint / (numPoints - 1);
numPoints = nPoint + 1;
b2Vec2 newBodiesPosition = b2Vec2(pointOfBreak->x / PTM_RATIO, pointOfBreak->y / PTM_RATIO);
b2World *world = newBodyA->GetWorld();
b2RopeJointDef jd;
jd.bodyA = joint->GetBodyA();
jd.bodyB = newBodyB;
jd.localAnchorA = joint->GetLocalAnchorA();
jd.localAnchorB = b2Vec2(0, 0);
jd.maxLength = joint->GetMaxLength() * cutRatio;
newBodyB->SetTransform(newBodiesPosition, 0.0);
b2RopeJoint *newJoint1 = (b2RopeJoint *)world->CreateJoint(&jd); //create joint
jd.bodyA = newBodyA;
jd.bodyB = joint->GetBodyB();
jd.localAnchorA = b2Vec2(0, 0);
jd.localAnchorB = joint->GetLocalAnchorB();
jd.maxLength = joint->GetMaxLength() * (1 - cutRatio);
newBodyA->SetTransform(newBodiesPosition, 0.0);
b2RopeJoint *newJoint2 = (b2RopeJoint *)world->CreateJoint(&jd);
world->DestroyJoint(joint);
joint = newJoint1;
VRope* newRope = new VRope(newJoint2,spriteSheet,newRopePoints,newRopeSticks,newRopeSprites);
return newRope;
}
void VRope::createRope(const CCPoint& pointA, const CCPoint& pointB, float distance)
{
// float distance = ccpDistance(pointA,pointB);
int segmentFactor = 12; // 16; //12; //increase value to have less segments per rope, decrease to have more segments
numPoints = (int) distance/segmentFactor;
CCPoint diffVector = ccpSub(pointB,pointA);
float multiplier = distance / (numPoints-1);
antiSagHack = 0.1f; //HACK: scale down rope points to cheat sag. set to 0 to disable, max suggested value 0.1
for(int i=0;i<numPoints;i++) {
CCPoint tmpVector = ccpAdd(pointA, ccpMult(ccpNormalize(diffVector), multiplier*i*(1-antiSagHack)));
VPoint *tmpPoint = new VPoint();
tmpPoint->setPos(tmpVector.x, tmpVector.y);
vPoints.push_back(tmpPoint);
}
for(int i=0;i<numPoints-1;i++) {
VStick* tmpStick = new VStick(vPoints[i], vPoints[i+1]);
vSticks.push_back(tmpStick);
}
if(spriteSheet) {
for(int i=0;i<numPoints-1;i++) {
VPoint* point1 = vSticks[i]->getPointA();
VPoint* point2 = vSticks[i]->getPointB();
CCPoint stickVector = ccpSub(ccp(point1->x,point1->y),ccp(point2->x,point2->y));
float stickAngle = ccpToAngle(stickVector);
float f = spriteSheet->getTextureAtlas()->getTexture()->getPixelsHigh() / CC_CONTENT_SCALE_FACTOR();
CCRect r = CCRectMake(0, 0, multiplier, f);
Sprite* tmpSprite = Sprite::createWithTexture(spriteSheet->getTexture(), r);
Texture2D::TexParams params = {GL_LINEAR, GL_LINEAR, GL_REPEAT, GL_REPEAT};
tmpSprite->getTexture()->setTexParameters(¶ms);
tmpSprite->setPosition(ccpMidpoint(ccp(point1->x, point1->y), ccp(point2->x, point2->y)));
tmpSprite->setRotation(-1 * CC_RADIANS_TO_DEGREES(stickAngle));
spriteSheet->addChild(tmpSprite);
ropeSprites.push_back(tmpSprite);
}
}
}