Podcharid Krungkarnchana

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A recent proposed model for triangular DP surfaces provided in [3] has been found that there is an inappropriate property in its recurrence formulae. It is lack of convexity, i.e., the summation of blending functions is not equal to one. This paper presents a new triangular DP surfaces that possesses the convexity property and quadratic evaluation(More)
A proposed model for triangular DP surfaces provided in [4] has been found that there is an inappropriate property in its recurrence formulae. That is, it is lack of convexity, i.e., summation of all blending functions for each degree is not equal to one. Although, Later in 2009, A new model of triangular DP surfaces [18] has been proposed, however, this(More)
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