Abstract

Vegetation plays a major role in the realistic display of outdoor scenes. However, manual plant placement can be tedious. For this reason this paper presents a new proposal in the field of procedural modeling of natural scenes. This method creates plant ecosystems that maximizes the covered space by optimizing an objective function subject to a series of constraints defined by a system of inequalities. This system includes the constraints of the environment taking into account characteristics of the terrain and the plant species involved. Once the inequality system has been defined, a solution will be obtained that tries to maximize the radius of the projected area of the trees and therefore the extension of the vegetation cover on the ground. The technique eliminates the trees that do not achieve a minimum growth radius, simulating the typical competitive process of nature. Results show the good performance and the high visual quality of the ecosystems obtained by the proposed technique. The use of this kind of optimization techniques could be used to solve other procedural modeling problems in other fields of application.

Highlights

  • The representation of outdoor scenes is currently a very popular field of research due to the huge number of applications that require them, such as ecosystem simulation [20, 26], video games [27], or geographic information systems [6, 39]

  • In order to avoid the problems of local-to-global techniques [29], this work presents a method for the distribution of trees and plants in natural environments through the use of linear programming techniques

  • The main contribution of this work is the design of inequality systems adapted to each seed in order to compute the size of the plant representation

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Summary

Introduction

The representation of outdoor scenes is currently a very popular field of research due to the huge number of applications that require them, such as ecosystem simulation [20, 26], video games [27], or geographic information systems [6, 39]. The procedural methods classified as local-to-global treat plants as individual entities to which rules are applied in order to simulate factors such as reproduction, growth, competition, interaction, variation or adaptation to the environment [15] This biological model of plants predicts patterns of vegetation distribution in an ecosystem where plants grow, adapt to the environment, reproduce and compete for space. In order to avoid the problems of local-to-global techniques [29], this work presents a method for the distribution of trees and plants in natural environments through the use of linear programming techniques In this case, the objective function to be maximized is the projected area of the set of plant species.

Previous work
Plant covering method
Seed dissemination process
Seed labeling process
Influence of the abiotic characteristics
Influence of the grouping of the vegetation species
Labeling process
Computing neighboring information
Inequality systems to maximize plant representations
Results
Validation of the method
Computational time analysis
Visual results
Conclusions
Full Text
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