Fast Rendering of Leaves
نویسنده
چکیده
One of the main problems of rendering outdoor scenes in real time is the representation of trees and plants. The modeling tools for vegetal species generate polygonal models with such a great geometric complexity that they need efficient techniques for achieving an interactive visualization. In this article we present a LOD model based on the geometric representation of leaves that eliminates bus traffic when changing the level of detail and enables instancing as many trees as desired. This model allows for a highly realistic visualization, skeletal animations for wind effects and also the use of traditional illumination techniques for polygonal models. The proposed representation permits to adapt automatically and in a continuous manner the level of detail, obtaining view-dependent resolutions. The basic idea consists in initially uploading to the GPU the vertices of the high resolution model and obtaining the desired approximation by rendering the appropriate vertices. This model improves the spatial cost and the rendering speed of any previous model based on the geometric representation of leaves. With respect to the models based on images, our solution offers a higher visual quality and also the possibility of including animations.
منابع مشابه
Physically Based Real-Time Translucency for Leaves
This paper presents a new shading model for real-time rendering of plant leaves that reproduces all important attributes of a leaf and allows for a large number of leaves to be shaded. In particular, we use a physically based model for accurate subsurface scattering on the translucent side of directly lit leaves. For real-time rendering of this model, we formulate it as an image convolution pro...
متن کاملFast Rendering of Large Crowds Using GPU
This paper proposes a fast rendering algorithm for real-time animation of large crowds, which is essential for video games with a large number of non-player characters. The proposed approach leaves the minimal work of rendering to CPU, and makes GPU take all the major work, including LOD assignment and view frustum culling, which have been the typical tasks of CPU. By offloading the rendering o...
متن کاملResearch on Fast Reconstruction of Virtual Plant Leaves
Based on the original image of plants leaves, the edge detection method will be used to extract the geometrical morphology of leaves. The characteristic points of the contour can be calculated by Harris method. The characteristic points will be used to construct the cubic Bezier curve fitting of contours of leaves, the leaf vein is generated by L system. Finally, the simulation drawing of plant...
متن کاملFast Photo-Realistic Rendering of Trees in Daylight
We propose a fast approach for photo-realistic rendering of trees under various kinds of daylight, which is particularly useful for the environmental assessment of landscapes. In our approach the 3D tree models are transformed to a quasi-3D tree database registering geometrical and shading information of tree surfaces, i.e. their normal vectors, relative depth, and shadowing of direct sunlight ...
متن کاملRendering Realistic Trees and Forests in Real Time
Real-Time rendering of realistic trees on common graphics hardware represents a big challenge due to their inherent geometric complexity. In most cases, trees are composed of hundreds of thousands of leaves and branches with complex lighting interrelations. We present novel techniques to render and animate photorealistic trees in real-time. The described techniques are easily implemented with c...
متن کامل