The dynamic geometry software ,such as GSP and SSP are based on construction drawing with rich and powerful drawing functions .But the construction-based drawing has some defects and is not natural . Although the constraint-based drawing can solve these problems ,it can not solve some drawing problems such as iteration problems limited on the complexity of the algorithm . So the dynamic geometry software with construction-based drawing and constraint-based drawing can greatly improve the intelligence and applicability .%基于构造的作图方式是被广泛应用的动态几何软件所使用的作图方式，其优点是作图功能丰富，但限于基于构造的这种作图方式使其作图方式不够自然，智能性不够；而基于约束求解的作图方式可以克服这些问题，但限于约束求解算法的复杂性，对于某些作图功能如迭代等还有待完善。因此，开发将基于构造作图和基于约束求解作图相结合的动态几何软件将大大提高作图软件的智能性，提高其应用的广泛性。
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