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复制代码

static void FractalBinaryTree(const Vector3& vStart, const Vector3& vEnd, Yreal angle, Yreal branch_c, Vector3* pVertices)

{

? ? Vector3 vSub = vEnd - vStart;

? ? Yreal len = D3DXVec3Length(&vSub);

? ? Yreal alfa = atan2f(vSub.y, vSub.x);

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? ? Yreal branch = len*branch_c;

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? ? pVertices[0] = vEnd;

? ? pVertices[1].x = pVertices[0].x + branch*cosf(alfa - angle);

? ? pVertices[1].y = pVertices[0].y + branch*sinf(alfa - angle);

? ? pVertices[1].z = 0.0f;

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? ? pVertices[2] = vEnd;

? ? pVertices[3].x = pVertices[2].x + branch*cosf(alfa + angle);

? ? pVertices[3].y = pVertices[2].y + branch*sinf(alfa + angle);

? ? pVertices[3].z = 0.0f;

}

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