Research On Virtual Plant Petal Modeling

Due to the complexity of flowering plants’morphology, there exist a couple of shortcomings in the process of visualization of calculating the volume and complexity of the algorithm,manual intervention. However, when modeling of flowers with petals of similar form but different levels,taking the Similar morphology into consideration, we can build an automatic generation model to achieve the modeling of flowers with different levels of petals so as to avoid repetitive work.The paper put forward an algorithm which is suit for flowers with structure of single, half-double and double petals because of the complex structure of Double flowers, the heavy nonlinear arrangement of petal and the poor effect of three dimensional simulation. First of all,according to the theory of arrangement mode in botany,the algorithm add the random Perturbation function and build different levels of flower Morphological model by expanded L system; Second, create basic model of petal by double three times Bezier surface, use Delaunay Triangulation algorithm to finish the work of petal triangular mesh, after that, control the parameter of Bezier surface to rebuild the curved surface by the triangular vetex, then we can obtain a curved suface mesh which has the same shape as the petal; Last, by the use of displacement texture, the method make deep exchange in the curved surface mesh of petal by the gray value of gray image, which can change its Segmentation geometry model to simulate the effect of concave and convex, fold and unfold of petal.The flower model obtain in the paper has a high degree of automation, base on the theory of botany and take different petal textures as example, the method can achieve any levels of flower modeling in a certain interval with a good sense of reality.