CHIBA,N.,OHKAWA,S.,MURAOKA,K.,AND MIURA, M. Visual simulation of botanical trees based on virtual heliotropism and dormancy break. The Journal of Visualization and Computer Animation 5 (1994), 3--15.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....sky is found. This place corresponds to the direction of further growth of the growing element. Apparently number of the casted rays depends on the number of nodes and the precision of the simulation. An alternative method of the light direction estimation is presented in the work of Chiba et al. [8]. They assume that the amount of light is constant for every point on the celestial sphere. They introduce a leaf ball which is an approximation of a cluster of leaves. This object is translucent with transparency according to number of included leaves. The light estimation is determined by ....

....of leaves, where i = 1; n and n is the number of buds. All leaves in cluster L i important for i th bud have assigned unique color denoted C i . All the others objects in the scene have the same color as the background, so they are rendered and therefore they cast shadows. In contradiction to [8] and [12] every object casts shadows in our simulation. When the colors are assigned to the clusters of leaves, the plant is rendered using Z buffer algorithm, constant shading, and parallel projection [5] The camera is placed into the middle of the face F k and its viewing vector is set to the ....

N. Chiba, S. Okawa, K. Muroaka, and M. Muira. Visual simulation of botanical trees based on virtual heliotropism and dormancy break. The Journal of Visualization and Computer Animation, 5:3--15, 1994.

....lengthening the blade of grass. According to biology, every plant grows in such a way that the light reaching a leaf produces photosynthates which are then transported to the adjacent bud which gives a proper response; i.e. it grows or it produces a blossom. This fact was captured by Chiba et al. [6, 7] who introduced an algorithm for the precise estimation of the incoming light. The algorithm is de facto a kind of a clustering technique which uses either ray casting or Z buffer sampling from every cluster to the light. The ray casting version of this approach was also used by Mech and ....

N. Chiba, S. Okawa, K. Muroaka, and M. Muira. Visual Simulation of Botanical Trees Based on Virtual Heliotropism and Dormancy Break. The Journal of Visualization and Computer Animation, 5:3--15, 1994.

.... root tips for nutrients and water transported in soil [12, 37] this mechanism is related to competition between growing branches of corals and sponges for nutrients diffusing in water [34] competition for light between three dimensional shoots of herbaceous plants [25] and branches of trees [9, 10, 11, 15, 33, 35, 52]. Models of exogenous phenomena require a comprehensive representation of both the developing plant and the environment. Consequently, they are the most difficult to formulate, implement, and document. Programs addressed to the biological audience are often limited to narrow groups of plants (for ....

....which biased the direction of growth towards the vector of the highest intensity of incoming light. Subsequently, Chiba et al. extended the models by Kanamaru et al. using more involved tree models that included a mechanism simulating the flow of hypothetical endogenous information within the tree [10, 11]. A biologically better justified model, formulated in terms of production and use of photosynthates by a tree, was proposed by Takenaka [52] The amount of light reaching leaf clusters was calculated by sampling a sky hemisphere, as in the work by Greene. Below we reproduce the main features of ....

CHIBA, N., OHKAWA, S., MURAOKA, K., AND MIURA, M. Visual simulation of botanical trees based on virtual heliotropism and dormancy break. The Journal of Visualization and Computer Animation 5 (1994), 3--15.

....it is likely to be somewhat similar to the original skeleton because of the following considerations. Trees sustain themselves by converting the sunlight that reaches their leaves into photosynthates, which then propagate from higher order to lower order branches, eventually reaching the trunk ([CHIBA94]) Since each branch costs the tree energy to maintain, most trees branching structures are such that their branches reach the largest possible space in the most economical way. These observations suggest that the structure of the tree skeleton is similar to the medial axis of the shape of the ....

....than the currently pruned branch by a constant factor defined in the L system. The second environmental process computes the amount of sunlight reaching each leaf in the tree. The process augments the mechanism for modeling competition for sunlight and the flow of photosynthates inside the tree ([CHIBA94]) that is implemented in the L system. The amount of sunlight reaching each leaf is converted into a quantity of photosynthates, which then make their way up from the thinner branches to thicker branches and, eventually, the trunk. On the way, each branch collects a toll, corresponding to the ....

N. Chiba, S. Ohkawa, K. Muraoka, and M. Miura, Visual simulation of botanical trees based on virtual heliotropism and dormancy break. The Journal of Visualization and Computer Animation 5 (1994), 3-15.

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CHIBA,N.,OHKAWA,S.,MURAOKA,K.,AND MIURA, M. Visual simulation of botanical trees based on virtual heliotropism and dormancy break. The Journal of Visualization and Computer Animation 5 (1994), 3--15.

No context found.

Chiba, N. -- Ohkawa, S. -- Muraoka, K. -- Miura, M., 1994a. Visual simulation of botanical trees based on virtual heliotropism and dormancy break. The Journal of Visualization and Computer Animation, 5: 3--15.

No context found.

CHIBA, N., OHKAWA, S., MURAOKA, K., AND MIURA, M. Visual simulation of botanical trees based on virtual heliotropism and dormancy break. The Journal of Visualization and Computer Animation 5 (1994), 3--15.

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