Shading Curves: Vector‐Based Drawing With Explicit Gradient Control
Shading Curves: Vector‐Based Drawing With Explicit Gradient Control
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DOI：
10.1111/cgf.12532
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发表时间：
2015-09
影响因子：
2.5
通讯作者：
H. Lieng;F. Tasse;J. Kosinka;N. Dodgson
中科院分区：
文献类型：
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作者：
H. Lieng;F. Tasse;J. Kosinka;N. Dodgson
矢量图形中的一个挑战是定义提供灵活的颜色梯度操作的图元。我们提出了一个新的原语，称为阴影曲线，支持显式和局部梯度控制。这是通过将着色轮廓与曲线的每一侧相关联来实现的。这些可以手动操作的阴影轮廓表示从其相关曲线出来的颜色梯度。通过2008年引入的扩散曲线过程实现这种显式和局部梯度控制是具有挑战性的，因为它只提供颜色梯度的隐式控制。我们解决这个问题，通过使用细分曲面构造的阴影曲线和他们的阴影配置文件。
A challenge in vector graphics is to define primitives that offer flexible manipulation of colour gradients. We propose a new primitive, called a shading curve, that supports explicit and local gradient control. This is achieved by associating shading profiles to each side of the curve. These shading profiles, which can be manually manipulated, represent the colour gradient out from their associated curves. Such explicit and local gradient control is challenging to achieve via the diffusion curve process, introduced in 2008, because it offers only implicit control of the colour gradient. We resolve this problem by using subdivision surfaces that are constructed from shading curves and their shading profiles.