Method updateParticleQuads

core/2d/ParticleSystemQuad.cpp:311–671

}

void ParticleSystemQuad::updateParticleQuads()
{
    if (_particleCount <= 0)
    {
        return;
    }

    Vec2 currentPosition;
    if (_positionType == PositionType::FREE)
    {
        currentPosition = this->convertToWorldSpace(Vec2::ZERO);
    }
    else if (_positionType == PositionType::RELATIVE)
    {
        currentPosition = _position;
    }

    V3F_C4B_T2F_Quad* startQuad;
    Vec2 pos = Vec2::ZERO;
    if (_batchNode)
    {
        V3F_C4B_T2F_Quad* batchQuads = _batchNode->getTextureAtlas()->getQuads();
        startQuad                    = &(batchQuads[_atlasIndex]);
        pos                          = _position;
    }
    else
    {
        startQuad = &(_quads[0]);
    }

    if (_positionType == PositionType::FREE)
    {
        Vec3 p1(currentPosition.x, currentPosition.y, 0);
        Mat4 worldToNodeTM = getWorldToNodeTransform();
        worldToNodeTM.transformPoint(&p1);
        Vec3 p2;
        Vec2 newPos;
        float* startX               = _particleData.startPosX;
        float* startY               = _particleData.startPosY;
        float* x                    = _particleData.posx;
        float* y                    = _particleData.posy;
        float* s                    = _particleData.size;
        float* r                    = _particleData.rotation;
        float* sr                   = _particleData.staticRotation;
        float* sid                  = _particleData.scaleInDelta;
        float* sil                  = _particleData.scaleInLength;
        V3F_C4B_T2F_Quad* quadStart = startQuad;
        if (_isScaleInAllocated)
        {
            for (int i = 0; i < _particleCount;
                 ++i, ++startX, ++startY, ++x, ++y, ++quadStart, ++s, ++r, ++sr, ++sid, ++sil)
            {
                p2.set(*startX, *startY, 0);
                worldToNodeTM.transformPoint(&p2);
                newPos.set(*x, *y);
                p2 = p1 - p2;
                newPos.x -= p2.x - pos.x;
                newPos.y -= p2.y - pos.y;