分形之皇冠（Crown）

皇冠分形曲线

核心代码:

static void FractalCrown(const Vector3& vStart, const Vector3& vEnd, Vector3* pVertices)
{
    Vector3 vSub = vEnd - vStart;
    Yreal len = D3DXVec3Length(&vSub);

    pVertices[] = vStart;
    pVertices[] = vEnd;

    Yreal alfa = atan2f(vSub.y, vSub.x);
    Yreal a0 = alfa - YD_REAL_PI/;
    Yreal a1 = alfa + YD_REAL_PI/;

    Yreal l = len//cosf(YD_REAL_PI/);
    pVertices[].x = vStart.x + cosf(a0)*l;
    pVertices[].y = vStart.y + sinf(a0)*l;
    pVertices[].z = 0.0f;

    pVertices[].x = vStart.x + cosf(a1)*l;
    pVertices[].y = vStart.y + sinf(a1)*l;
    pVertices[].z = 0.0f;

    pVertices[].x = vEnd.x - cosf(a0)*l;
    pVertices[].y = vEnd.y - sinf(a0)*l;
    pVertices[].z = 0.0f;

    pVertices[].x = vEnd.x - cosf(a1)*l;
    pVertices[].y = vEnd.y - sinf(a1)*l;
    pVertices[].z = 0.0f;

    pVertices[] = (vStart + vEnd + pVertices[] + pVertices[])*0.25f;
}

软件截图：

软件下载地址:http://files.cnblogs.com/WhyEngine/Fractal.7z