Terrain Modelling from Feature Primitives

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Date
2015
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Copyright © 2015 The Eurographics Association and John Wiley & Sons Ltd.
Abstract
We introduce a compact hierarchical procedural model that combines feature‐based primitives to describe complex terrains with varying level of detail. Our model is inspired by skeletal implicit surfaces and defines the terrain elevation function by using a construction tree. Leaves represent terrain features and they are generic parametrized skeletal primitives, such as mountains, ridges, valleys, rivers, lakes or roads. Inner nodes combine the leaves and subtrees by carving, blending or warping operators. The elevation of the terrain at a given point is evaluated by traversing the tree and by combining the contributions of the primitives. The definition of the tree leaves and operators guarantees that the resulting elevation function is Lipschitz, which speeds up the sphere tracing used to render the terrain. Our model is compact and allows for the creation of large terrains with a high level o detail using a reduced set of primitives. We show the creation of different kinds of landscapes and demonstrate that our model allows to efficiently control the shape and distribution of landform features.We introduce a compact hierarchical procedural model that combines feature‐based primitives to describe complex terrains with varying level of detail. Our model is inspired by skeletal implicit surfaces and defines the terrain elevation function by using a construction tree. Leaves represent terrain features and they are generic parametrized skeletal primitives, such as mountains, ridges, valleys, rivers, lakes or roads. Inner nodes combine the leaves and subtrees by carving, blending or warping operators. The elevation of the terrain at a given point is evaluated by traversing the tree and by combining the contributions of the primitives. The definition of the tree leaves and operators guarantees that the resulting elevation function is Lipschitz, which speeds up the sphere tracing used to render the terrain. Our model is compact and allows for the creation of large terrains with a high level o detail using a reduced set of primitives.
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@article{
10.1111:cgf.12530
, journal = {Computer Graphics Forum}, title = {{
Terrain Modelling from Feature Primitives
}}, author = {
Génevaux, Jean‐David
and
Galin, Eric
and
Peytavie, Adrien
and
Guérin, Eric
and
Briquet, Cyril
and
Grosbellet, François
and
Benes, Bedrich
}, year = {
2015
}, publisher = {
Copyright © 2015 The Eurographics Association and John Wiley & Sons Ltd.
}, DOI = {
10.1111/cgf.12530
} }
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