Detecting and resolving the collision of organs between different plants or the collision of different organs of a single plant are key issues in the realistic construction of a virtual plant population.A suitable col...Detecting and resolving the collision of organs between different plants or the collision of different organs of a single plant are key issues in the realistic construction of a virtual plant population.A suitable collision detection scheme is necessary to prevent a reduction in realism caused by organ penetration.A mixed bounding volume tree construction scheme based on the growth characteristics of tomato plants is proposed in this paper,and the construction mode of the bounding at all levels is simplified by using a digital tomato model.Using a parallel GPU approach,we designed a tomato plant population collision detection program with CUDA acceleration.The proposed method reduces the total collision detection time by 92%-96%.展开更多
The reflection of a bright light source on a dynamic surface such as water with waves can be difficult to render well in real time due to reflection aliasing and flickering.In this paper,we propose a solution to this ...The reflection of a bright light source on a dynamic surface such as water with waves can be difficult to render well in real time due to reflection aliasing and flickering.In this paper,we propose a solution to this problem by approximating the reflection direction distribution for the water surface as an elliptical Gaussian distribution.Then we analytically integrate the reflection contribution throughout the rendering interval time.Our method can render in real time an animation of the time integrated reflection of a spherical light source on highly dynamic waves with reduced aliasing and flickering.展开更多
Considering the time-consuming and tedious work of the current methods to control plant layout,which is mostly based on expert experience or field trials,we propose an algorithm to optimize and simulate a planting lay...Considering the time-consuming and tedious work of the current methods to control plant layout,which is mostly based on expert experience or field trials,we propose an algorithm to optimize and simulate a planting layout based on a virtual plant model and an optimization algorithm.A functional-structural plant model,which combines the structure and physiological function of plants,is used to construct a planting scene.The planting and row spacing are set as the genetic factors and the chromosomes of the genetic algorithm are encoded with a binary method.The photosynthetic yield of the unit planting area is denoted as the fitness value.By using this method,the intercropping of maize and soybean plants and the sole cropping of rice plants are studied.Experimental results show that the proposed method can obtain a high yield planting plan.展开更多
基金This work was supported by the National Natural Science Foundations of China(61571400,31471416)Natural Science Foundations of Zhejiang Province(LY18C130012).
文摘Detecting and resolving the collision of organs between different plants or the collision of different organs of a single plant are key issues in the realistic construction of a virtual plant population.A suitable collision detection scheme is necessary to prevent a reduction in realism caused by organ penetration.A mixed bounding volume tree construction scheme based on the growth characteristics of tomato plants is proposed in this paper,and the construction mode of the bounding at all levels is simplified by using a digital tomato model.Using a parallel GPU approach,we designed a tomato plant population collision detection program with CUDA acceleration.The proposed method reduces the total collision detection time by 92%-96%.
基金supported by JSPS KAKENHI Grant Nos.JP15H05924,JP18H03348,and JP20H05954.
文摘The reflection of a bright light source on a dynamic surface such as water with waves can be difficult to render well in real time due to reflection aliasing and flickering.In this paper,we propose a solution to this problem by approximating the reflection direction distribution for the water surface as an elliptical Gaussian distribution.Then we analytically integrate the reflection contribution throughout the rendering interval time.Our method can render in real time an animation of the time integrated reflection of a spherical light source on highly dynamic waves with reduced aliasing and flickering.
基金This work was supported by the Natural Science Foundations of Zhejiang Province(LY18C130012)and the National Natural Science Foundations of China(31471416)The authors are grateful to the anonymous reviewers whose comments helped to improve this paper.
文摘Considering the time-consuming and tedious work of the current methods to control plant layout,which is mostly based on expert experience or field trials,we propose an algorithm to optimize and simulate a planting layout based on a virtual plant model and an optimization algorithm.A functional-structural plant model,which combines the structure and physiological function of plants,is used to construct a planting scene.The planting and row spacing are set as the genetic factors and the chromosomes of the genetic algorithm are encoded with a binary method.The photosynthetic yield of the unit planting area is denoted as the fitness value.By using this method,the intercropping of maize and soybean plants and the sole cropping of rice plants are studied.Experimental results show that the proposed method can obtain a high yield planting plan.
