The Fracture radial rollout contains parameters for the “fracture radial” fracture mode. In this mode, a radial fracture pattern is generated and applied to fracture planes scattered over fracture points on the input mesh.
Radial fracture patterns consist of two elements: radial lines and concentric lines. Radial lines extend outwards from the center of the fracture pattern, and concentric lines trace around the center of the fracture pattern, connecting the radial lines.
Count: the number of radial lines to generate outward from the center of the fracture pattern.
Resolution: the number of sub-segments each radial line will be composed of.
Probability %: the probability that a given radial line will not be culled. Decreasing this value will increase the chances that a given radial line will be removed from the fracture pattern, thereby increasing its randomness.
Size %: the overall size of radial lines, relative to the size of the underlying fracture plane.
Crop center: crops radial lines, from the center outwards, by removing sub-segments. Increasing this value decreases the density of radial lines closer to the center of the fracture pattern.
Crop border: crops radial lines, from the outward edges inward, by removing sub-segments. Increasing this value decreases the length of radial lines.
Enable random walk: when enabled, radial lines will be affected by random walk noise as they expand outwards, causing them to expand outward in more random patterns.
Prevent intersections: when enabled, radial lines will be prevented from intersecting each other, during their random walk outwards.
Resolution: the number of sub-segments a concentric line will be composed of. Note: the actual number of sub-segments a given concentric line will be composed of is relative to its coverage of the fracture pattern, in degrees, multiplied by this value. If resolution is set to 100 and a given concentric line only has 180 degrees of pattern coverage, it will be composed of only 50 sub-segments.
Every nth: controls how many concentric lines will be generated, relative to the resolution of the radial lines. For example, if radial lines is set to 100 and “every nth” is set to 5, then 20 concentric lines will be generated (1 for every 5 radial line sub-segments).
Ring %: controls the probability that a given ring of concentric lines will not be culled. Increasing this value decreases the density of concentric lines.
Segment %: controls the probablity that a concentric line segment (a concentric line spanning two radial lines) will not be culled. Incrasing this value breaks up concetric lines which would otherwise travel all the way around the fracture pattern.
Jagged %: controls the probability that a given concetric line segment will undergo “jagged” transformation (that it will connect to mis-aligned sub-segments along its corresponding start and end radial lines, based on the “jagged max” parameter).
Jagged max: controls the maximum amount of mis-alignment that a concentric line segment may undergo.
Normally, concentric lines will connect at the same sub-segment index located on its start and end radial lines. For example, if two radial lines have a resolution of 100, the concetric line that connects them at their center will start at sub-segment 50 on the first radial line, and connect to sub-segment 50 on the second radial line. However, by increasing the jagged parameters, the sub-segment indices that the concetric line connects at will be more random. If the “jagged max” parameter is set to 5, the start sub-segment index might be 45, and the end sub-segment index might be 55. This would tilt the concetric line relative to its start/end radial lines, giving the interior fracture a more jagged appearance.
Density curve: this curve allows you to control the density of concetric lines within the fracture pattern, relative to their distance from the center of the fracture pattern.
Noise influence: allows you to control how much influence fracture noise A/B will have on the pattern, relative to the center of the pattern.