Semi-interactive morphogenesis

This paper presents a method to simulate growth phenomena, and its application to the modeling of complex organic shapes (e.g., plants organs) and folded surfaces. Our main contribution is the interactive and stable resolution of the mechanical problem of growth-induced deformations, based on the minimization of the energy due to the various constraints in the shell. >From this, we propose a new modeling approach based on a set of growing tools: The user can apply 'hot spots', 'hot curves', or paint growing parameters on the surface to grow. Growth can be simulated either simultaneously to the user interaction, or once all parameters have been settled on the surface (which allows the use of textures of parameters and procedural operations). The main parameters are the intensity and anisotropy of growth, as well as their variations over time. Geometric constraints and plasticity can also be considered. As our results show shapes can fold, bend, and curl as in nature, which deforming tools such as displacement map could not achieve. We demonstrate our tool with an interactive session and a gallery of shapes easily produced

A Developmental System for Organic Form Synthesis

Abstract. Modelling the geometry of organic forms using traditional CAD or animation tools is often difficult and tedious. Different models of morphogenesis have been successfully applied to this problem; however many kinds of organic shape still pose difficulty. This paper introduces a novel system, the Simplicial Developmental System (SDS), which simulates morphogenetic and physical processes in order to generate specific organic forms. SDS models a system of cells as a dynamic simplicial complex in two or three dimensions that is governed by physical rules. Through growth, division, and movement, the cells transform the geometric and physical representations of the form. The actions of the cells are governed by conditional rules and communication between cells is supported with a continuous morphogen model. Results are presented in which simple organic forms are grown using a model inspired by limb bud development in chick embryos. These results are discussed in the context of using SDS as a creative system.

Semi-interactive morphogenesis

This paper presents a method to simulate growth phenomena, and its application to the modeling of complex organic shapes (e.g., plants organs) and folded surfaces. Our main contribution is the interactive and stable resolution of the mechanical problem of growth-induced deformations, based on the minimization of the energy due to the various constraints in the shell. >From this, we propose a new modeling approach based on a set of growing tools: The user can apply 'hot spots', 'hot curves', or paint growing parameters on the surface to grow. Growth can be simulated either simultaneously to the user interaction, or once all parameters have been settled on the surface (which allows the use of textures of parameters and procedural operations). The main parameters are the intensity and anisotropy of growth, as well as their variations over time. Geometric constraints and plasticity can also be considered. As our results show shapes can fold, bend, and curl as in nature, which deforming tools such as displacement map could not achieve. We demonstrate our tool with an interactive session and a gallery of shapes easily produced

Semi-Interactive Morphogenesis

International audienceThis poster (for the paper, see SMI'06) presents a method to simulate growth phenomena, and its application to the modeling of complex organic shapes (e.g., plants organs) and folded surfaces. Our main contribution is the interactive and stable resolution of the mechanical problem of growth-induced deformations, based on the minimization of the energy due to the various constraints in the shell. From this, we propose a new modeling approach based on a set of growing tools: The user can apply 'hot spots', 'hot curves', or paint growing parameters on the surface to grow. Growth can be simulated either simultaneously to the user interaction, or once all parameters have been settled on the surface (which allows the use of textures of parameters and procedural operations). The main parameters are the intensity and anisotropy of growth, as well as their variations over time. Geometric constraints and plasticity can also be considered. As our results show shapes can fold, bend, and curl as in nature, which deforming tools such as displacement map could not achieve. We demonstrate our tool with an interactive session and a gallery of shapes easily produced.Ce poster (pour le papier, voir SMI'06) presente une methode permettant de simuler des phenomenes de croissance, ainsi que ses applications pour la modelisation de formes organiques complexes ou des surface plissees. Notre principale contribution est la resolution stable et en temps interactif du probleme mecanique des deformations induites par la croissance, grace a la minimisation de l'energie des contraintes qui s'appliquent a une coque. Nous proposons une nouvelle approche de la modelisation basee sur un ensemble d'outils de croissance: l'utilisateur peut appliquer des 'points chauds', des 'contrours de croissance' ou peindre directement les parametres de croissance sur la surface. La croissance peut etre simulee soit simultanement aux interactions de l'utilisateur, soit une fois que tous les parametres aient ete fixes sur la surface (ce qui autorise l'utilisation d'une texture de ces parametres ainsi que les operations procedurales). Les principaux parametres sont l'intensite et l'anisotropie de la croissance, ainsi que leurs variations au cours de temps. On peut egalement tenir compte de la plasticite ainsi que de contraintes geometriques. Comme le montre nos resultats, les formes peuvent se plisser, plier ou se tordre (comme dans la nature), ce que des outils de deformations bases sur des cartes de deplacements ne peuvent reussir de maniere simple

Semi-interactive morphogenesis

International audienceThis paper presents a method to simulate growth phenomena, and its application to the modeling of complex organic shapes (e.g., plants organs) and folded surfaces. Our main contribution is the interactive and stable resolution of the mechanical problem of growth-induced deformations, based on the minimization of the energy due to the various constraints in the shell. From this, we propose a new modeling approach based on a set of growing tools: The user can apply 'hot spots', 'hot curves', or paint growing parameters on the surface to grow. Growth can be simulated either simultaneously to the user interaction, or once all parameters have been settled on the surface (which allows the use of textures of parameters and procedural operations). The main parameters are the intensity and anisotropy of growth, as well as their variations over time. Geometric constraints and plasticity can also be considered. As our results show shapes can fold, bend, and curl as in nature, which deforming tools such as displacement map could not achieve. We demonstrate our tool with an interactive session and a gallery of shapes easily produced.Cet article presente une methode permettant de simuler des phenomenes de croissance, ainsi que ses applications pour la modelisation de formes organiques complexes ou des surface plissees. Notre principale contribution est la resolution stable et en temps interactif du probleme mecanique des deformations induites par la croissance, grace a la minimisation de l'energie des contraintes qui s'appliquent a une coque. Nous proposons une nouvelle approche de la modelisation basee sur un ensemble d'outils de croissance: l'utilisateur peut appliquer des 'points chauds', des 'contrours de croissance' ou peindre directement les parametres de croissance sur la surface. La croissance peut etre simulee soit simultanement aux interactions de l'utilisateur, soit une fois que tous les parametres aient ete fixes sur la surface (ce qui autorise l'utilisation d'une texture de ces parametres ainsi que les operations procedurales). Les principaux parametres sont l'intensite et l'anisotropie de la croissance, ainsi que leurs variations au cours de temps. On peut egalement tenir compte de la plasticite ainsi que de contraintes geometriques. Comme le montre nos resultats, les formes peuvent se plisser, plier ou se tordre (comme dans la nature), ce que des outils de deformations bases sur des cartes de deplacements ne peuvent reussir de maniere simple

Semi-interactive morphogenesis

International audienceThis paper presents a method to simulate growth phenomena, and its application to the modeling of complex organic shapes (e.g., plants organs) and folded surfaces. Our main contribution is the interactive and stable resolution of the mechanical problem of growth-induced deformations, based on the minimization of the energy due to the various constraints in the shell. From this, we propose a new modeling approach based on a set of growing tools: The user can apply 'hot spots', 'hot curves', or paint growing parameters on the surface to grow. Growth can be simulated either simultaneously to the user interaction, or once all parameters have been settled on the surface (which allows the use of textures of parameters and procedural operations). The main parameters are the intensity and anisotropy of growth, as well as their variations over time. Geometric constraints and plasticity can also be considered. As our results show shapes can fold, bend, and curl as in nature, which deforming tools such as displacement map could not achieve. We demonstrate our tool with an interactive session and a gallery of shapes easily produced.Cet article presente une methode permettant de simuler des phenomenes de croissance, ainsi que ses applications pour la modelisation de formes organiques complexes ou des surface plissees. Notre principale contribution est la resolution stable et en temps interactif du probleme mecanique des deformations induites par la croissance, grace a la minimisation de l'energie des contraintes qui s'appliquent a une coque. Nous proposons une nouvelle approche de la modelisation basee sur un ensemble d'outils de croissance: l'utilisateur peut appliquer des 'points chauds', des 'contrours de croissance' ou peindre directement les parametres de croissance sur la surface. La croissance peut etre simulee soit simultanement aux interactions de l'utilisateur, soit une fois que tous les parametres aient ete fixes sur la surface (ce qui autorise l'utilisation d'une texture de ces parametres ainsi que les operations procedurales). Les principaux parametres sont l'intensite et l'anisotropie de la croissance, ainsi que leurs variations au cours de temps. On peut egalement tenir compte de la plasticite ainsi que de contraintes geometriques. Comme le montre nos resultats, les formes peuvent se plisser, plier ou se tordre (comme dans la nature), ce que des outils de deformations bases sur des cartes de deplacements ne peuvent reussir de maniere simple