TY  - JOUR
T1  - Crack Map Synthesis Using Primitives and a Guidance Vector Field
AU  - Jung, Hyojin 
AU  - Jeong, Yuna 
AU  - Lee, Sungkil 
JO  - Journal of KIISE, JOK
PY  - 2018
DA  - 2018/1/14
DO  - 10.5626/JOK.2018.45.10.996
KW  - crack
KW  - crack map
KW  - height map
KW  - primitive
KW  - synthesis
AB  - Cracks effectively show surface changes caused by weather or impacts. In general, crack rendering uses physically-based simulations. However, these approaches require huge computational cost, and it is hard to intuitively obtain non-physical effects. This paper presents a crack-map synthesis technique based on crack-map primitives and a guidance vector field. Diverse crack patterns are pre-defined as height maps. Their placements are determined by the Perlin noise-based guidance vector field. The output crack map is defined as a composite of primitives. When multiple primitives exist in the same area, the lowest of their heights is selected. Unlike other physically-based rendering approaches that have previously been used, our primitive-based approach allows us to easily obtain intuitive crack effects as desired.