| TexMap LIC leverages texture mapping (GL_TEXTURE_2D) and buffer accumulation (GL_ACCUM_BUFFER_BIT), two OpenGL-compliant hardware capabilities, to accelerate LIC image generation. A Cartesian mesh is initially established with the same resolution as that of the flow field. As the mesh is successively warped in the flow direction, the noise texture is advected through texture mapping to produce a sequence of intermediate textures, which are sent to the accumulation buffer (glAccum(GL_ACCUM, fWeight)) where the LIC image is finally obtained via texture convolution ( glAccum(GL_RETURN, 1.0f), Figure 1 ). Either white noise (Figure 2) or sparse noise (Figure 3) can be employed as the input texture. |
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Figure 1. The pipeline of TexMap
LIC (©
Zhanping Liu).
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Figure 2. TexMap LIC images generated
using white noise as the input texture.
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Figure 3. TexMap LIC images generated
using sparse noise as the input texture.
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