2.8.10.8 Pattern Modifiers

Modify the evaluation of a pattern function:

PATTERN_MODIFIERS:

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[TURBULENCE] & [WARP...] & [TRANSFORMATION...] & [noise_generator NG_TYPE]

NG_TYPE:

1 | 2 | 3

TURBULENCE:

turbulence VECTOR & [octaves INT] & [omega FLOAT] & [lambda FLOAT]

WARP:

warp { WARP_ITEM }

WARP_ITEM:

REPEAT_WARP | BLACK_HOLE_WARP | TURBULENCE | CYLINDRICAL_WARP | SPHERICAL_WARP | TOROIDAL_WARP | PLANAR_WARP

REPEAT_WARP:

repeat VECTOR [offset VECTOR] [flip VECTOR]

BLACK_HOLE_WARP:

black_hole V_LOCATION, F_RADIUS [BLACK_HOLE_ITEMS]

BLACK_HOLE_ITEMS:

[strength FLOAT] & [falloff FLOAT] & [inverse] & [repeat VECTOR [turbulence VECTOR]]

CYLINDRICAL_WARP:

cylindrical [orientation VECTOR] [dist_exp FLOAT]

SPHERICAL_WARP:

spherical [orientation VECTOR] [dist_exp FLOAT]

TOROIDAL_WARP:

toroidal [orientation VECTOR] [dist_exp FLOAT] [major_radius FLOAT]

PLANAR_WARP:

planar [V_NORMAL, F_DISTANCE]

Modify the usage of a blend map:

BLEND_MAP_MODIFIERS:

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[frequency FLOAT] & [phase FLOAT] & [WAVEFORM]

WAVEFORM:

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ramp_wave | triangle_wave | sine_wave | scallop_wave | cubic_wave | poly_wave [F_EXPONENT]

Specify a two-dimensional bitmap image for a pattern:

BITMAP_IMAGE:

FUNCTION_IMAGE | BITMAP_TYPE FILE_NAME

FUNCTION_IMAGE:

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function I_WIDTH, I_HEIGHT { FUNCTION_IMAGE_BODY }

FUNCTION_IMAGE_BODY:

PIGMENT | FN_FLOAT | pattern { PATTERN [PATTERN_MODIFIERS] }

PATTERN:

MAP_PATTERN | brick [BRICK_ITEMS] | checker | hexagon | object { LIST_OBJECT }

BITMAP_TYPE:

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gif | tga | iff | ppm | pgm | png | jpeg | tiff | sys

Modify how a 2-D bitmap is to be applied to a 3-D surface:

BITMAP_MODIFIERS:

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[once] & [map_type MAP_TYPE] & [interpolate INTERPOLATE_TYPE]

MAP_TYPE:

0 | 1 | 2 | 5

INTERPOLATE_TYPE:

2 | 4

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