Research The Virtual Display Of Sweater Based On The Parameter Model

Sweaters are comfortable,beautiful and elastic,and they are good at keeping people warm during the cold days.Thus,sweaters are popular in people’s daily life,and they play an important role in the clothing industry.Nowadays,people pay attention to their individuality.Due to the improvement of manufacturing technologies and information technologies,new materials and styles are continuously applied in this industry.This lead to a customised,fashionoriented and rapidly updating trend in the clothing industry.Therefore,many manufacturers developed intelligent software tools such as Computer Aided Design(CAD)and Real-time 3D Virtual Dressing Display in the designing process.At present,CAD(Computer Aided Design)focuses more on the model designing,pattern designing and fabric simulation,and this system cannot satisfy all requirements from the 3D model design to the virtual dressing display of the sweaters.Thus,based on the 3D body model,this paper focuses on the 3D sweater model design,2D pattern development and virtual dressing display.Major achievements are shown as follows.1.Modelling the sweater design based on the 3D body characteristics.According to the analysis on sweater model design and the knitting principles,the paper explores the modelling methods to develop the style of a sweater,which is based on the body characteristics of the human body.Firstly,based on the characteristics of the human body obtained by body cutting rings and the features of the sweater model,the key points of the model design can be determined.Then,the paper establishes the sweater loose model in each section,such as the chest,waist and haunches.The looseness of the model can be adjusted to change the margin between the key points and the human body.Surface fitting is employed to determine the different designing sections.Finally,the surface interpolation is applied to develop the surface of the sweater model.A typical 3D sweater model can be developed by combining and fitting the surfaces of different designing sections.2.The research in 2D sweater pattern.The 3D sweater model design is transferred to multiple 2D pattern by using the map functions.The 3D model design is divided into various sections according to the structural characteristics of the style.The paper also develops an algorithm to complete the projection between 3D model design and 2D pattern.Based on this,pattern can be enriched by changing the boundary functions of the pattern.3.The research in sweater forming texture pattern.Based on the extraction style pattern sizes,the transformation from the pattern to forming pattern can be achieved by the parameterbased forming techniques.The forming pattern can be developed by combining the 2D pattern unit images and unit image mesh together.The structure of the sweater can be built by the pattern projection between the forming texture pattern and style pattern.According to the sweater forming pattern,a model that predicts the material consumption can be established,and therefore the mathematical expression of the model is derived.This model is applied to estimate the cost of various styles using various materials.4.The research in the sweater mesh node restricting collection based on physical models.During the physical modelling of the sweater,the woollen sweater mesh node restricting collection is developed on the basis of PBD model to ensure the stability of the sweater in the simulation mesh.The 3D stitching stability is maintained by restricting the distance between two points.The point-surface processing copes with the contact response between the 3D sweater and the human body.Thus,the 3D dressing status of the sweater can be displayed in real time.5.The research in sweater force simulation based on the distance domain.In order to simulate the physical effect of a sweater being dressed,the paper proposes the clothing mesh force analysis based on the distance domain.The distance between the human body and the sweater are regarded as the parameters in determining the partss of the clothing mesh.The proportion of a certain parts can be increased or decreased by adjusting the parameters in each level.In each parts,the force analysis is conducted,including the gravity and other forces.The force models are applied to derive the componentof force along the axis in the parts mesh.Therefore,the deformation of the sweater can be modelled in the corresponding parts.Together with the areal force model,the parameters between the sweater and the human body can be adjusted to achieve a desirable balance between the simulation speed and effectiveness.6.The realisation of the sweater virtual display system.This paper applies Microsoft Visual Studio 2010 and OpenGL to verify the effectiveness and feasibility of the algorithm.These tools provide a user-friendly operating interfaces.The display system achieves the 3D style surface building,the projection between 3D sweater style model and 2D pettern,forming pattern building,parts division and the parts force simulation.It is able to set the style,sample and forming texture pattern,and develop the 3D dressing effect of the sweater rapidly.The effectiveness of the system and algorithm have been verified by testing various styles of sweaters.In conclusion,the paper conducts the research in the aspects above.It solves the practical problems related to the sweater style design,the development of parameter-based sample plates and the simulation of wrinkles.It develops the virtual display system to illustrate the features of styles and patterns.The system assists the sweater designers to complete the designing tasks in efficiently.At the same time,it provides a feasible approach to realise the dynamic clothing display and personalized clothing design service.