Clothing simulation apparatus, clothing simulation program, and clothing simulation method
A clothing simulation apparatus precisely determines clothing pressure for bringing a clothing into tight contact with a human body. A fitting part 22 divides a paper pattern model into a plurality of elements, imparts dynamic characteristics shown by a fabric model to each element, deforms the paper pattern model by solving the motion equation of each element using a finite element method, and then fits the clothing virtually to a human body model. The fitting part 22 sets a temporary model to cover a predetermined section of the human body model, deforms the paper pattern model to bring the paper pattern model into contact with the temporary model, and thereafter deforms the paper pattern model to bring the paper pattern model into contact with the human body model.
1. A clothing simulation apparatus, comprising:
human body model acquisition part for acquiring a human body model showing a three-dimensional shape of a human body;
paper pattern model acquisition part for acquiring a paper pattern model showing a two-dimensional shape of a pattern paper of a clothing that is fitted virtually to the human body model;
fabric model acquisition part for acquiring a fabric model showing dynamic characteristics of a fabric configuring the clothing;
fitting part for dividing the paper pattern model into a plurality of elements, imparting the dynamic characteristics shown by the fabric model to each element, deforming the paper pattern model by solving a motion equation of each element using a finite element method, and then fitting the clothing virtually to the human body model; and
clothing pressure calculation part for calculating a clothing pressure that is virtually applied to the human body model by the clothing fitted by the fitting part,
wherein the fitting part sets a temporary model that is formed so as to cover a predetermined section of the human body model, deforms the paper pattern model to bring the paper pattern model into contact with the temporary model, and thereafter deforms the paper pattern model to bring the paper pattern model into contact with the human body model.
2. The clothing simulation apparatus according to claim 1 , wherein
the fabric model simulates a shell river structure configured by a base material, a longitude river arrayed in a longitudinal direction within the base material to reinforce the base material, and a latitude river arrayed in a latitudinal direction within the base material to reinforce the base material,
the fabric model expresses the rigidity of the fabric using a base material rigid component showing the rigidity of the base material, a longitude river rigid component showing the rigidity of the longitude river, and a latitude rigid component showing the rigidity of the latitude river,
the base material rigid component is calculated based on the rigidity in a bias direction of an true fabric,
the longitude river rigid component is applied with a difference between the rigidity in a longitudinal direction of the true fabric and the base material rigid component, and
the latitude river rigid component is applied with a difference between the rigidity in a latitudinal direction of the true fabric and the base material rigid component.
3. The clothing simulation apparatus according to claim 2 , wherein the base material rigid component is calculated based on a function of strain energy generated by superelasticity.
4. The clothing simulation apparatus according to claim 1 , wherein the temporary model has a smoothly-curved surface.
5. The clothing simulation apparatus according to claim 4 , wherein the temporary model is in the shape of a cylinder, an ellipsoidal body, a saddle, a polygonal pyramid or a circular cone.
6. The clothing simulation apparatus according to claim 1 , wherein
the clothing is an upper-body clothing,
the paper pattern model includes paper pattern models for a front body part, back body part, left sleeve and right sleeve, and
the fitting part sets a cylindrical temporary model on a left arm and right arm of the human body and sets the cylindrical temporary model such that an axial direction thereof follows a straight line connecting both shoulders of the human body.
7. The clothing simulation apparatus according to claim 1 , wherein
the clothing is an upper-body clothing,
the paper pattern model includes paper pattern models for a front body part and back body part, and
the fitting part sets a cylindrical temporary model such that an axial direction thereof follows a straight line connecting both shoulders of the human body model.
8. The clothing simulation apparatus according to claim 1 , wherein
the clothing is a lower-body clothing,
the paper pattern model includes paper pattern models for a left leg and right leg, and
the fitting part sets a cylindrical temporary model on the left leg and the right leg of the human body model and sets a saddle-shaped temporary model on a hip of the human body model such that a ridge line thereof is laid in parallel to a horizontal direction of the human body model and faces the legs.
9. A non-transitory computer-readable recording medium which stores clothing simulation program, the program causing a computer to function as at least:
human body model acquisition means for acquiring a human body model showing a three-dimensional shape of a human body;
paper pattern model acquisition means for acquiring a paper pattern model showing a two-dimensional shape of a pattern paper of a clothing that is fitted virtually to the human body model;
fabric model acquisition means for acquiring a fabric model showing dynamic characteristics of a fabric configuring the clothing;
fitting means for dividing the paper pattern model into a plurality of elements, imparting the dynamic characteristics shown by the fabric model to each element, deforming the paper pattern model by solving a motion equation of each element using a finite element method, and then fitting the clothing virtually to the human body model; and
clothing pressure calculation means for calculating a clothing pressure that is virtually applied to the human body model by the paper pattern model fitted by the fitting means,
wherein the fitting means sets a temporary model that is formed so as to cover a predetermined section of the human body model, deforms the paper pattern model to bring the paper pattern model into contact with the temporary model, and thereafter deforms the paper pattern model to bring the paper pattern model into contact with the human body model.
10. A clothing simulation method, comprising:
a human body model acquisition step in which a computer acquires a human body model showing a three-dimensional shape of a human body;
a paper pattern model acquisition step in which the computer acquires a paper pattern model showing a two-dimensional shape of a pattern paper of a clothing that is fitted virtually to the human body model;
a fabric model acquisition step in which the computer acquires a fabric model showing dynamic characteristics of a fabric configuring the clothing;
a fitting step in which the computer divides the paper pattern model into a plurality of elements, imparts the dynamic characteristics shown by the fabric model to each element, deforms the paper pattern model by solving a motion equation of each element using a finite element method, and then fits the clothing virtually to the human body model; and
a clothing pressure calculation step in which the computer calculates a clothing pressure that is virtually applied to the human body model by the paper pattern model fitted by the fitting step, wherein
in the fitting step, the fitting step sets a temporary model that is formed so as to cover a predetermined section of the human body model, deforms the paper pattern model to bring the paper pattern model into contact with the temporary model, and thereafter deforms the paper pattern model to bring the paper pattern model into contact with the human body model.