f8d579d153
On its own, the main functionality of the Radial Tiling node is the ability to divide a 2D Cartesian coordinate system into as many radial segments as specified by the "Segments" input. Each segment has its own affinely transformed coordinate system, provided through the "Segment Coordinates" output, which can be used to tile textures in a radially symmetric manner. Additionally, a unique index is provided for every segment through the "Segment ID" output, the width of each segment at Y-coordinate of the "Segment Coordinates" output without normalization = 0 is provided through the "Segment Width" output and the rotation value of the affine transformation of the coordinate system of each segment is provided through the "Segment Rotation" output. The roundness of the coordinate lines of the "Segment Coordinates" output can be controlled through the "Roundness" inputs. This can be used to make the coordinate systems of the segments a mix of Cartesian and polar coordinates. Lastly, the lines of points of the "Segment Coordinates" output with constant Y-coordinates have the shape of polygon with rounded corners, which can be used to procedurally create rounded polygons. Pull Request: https://projects.blender.org/blender/blender/pulls/127711
78 lines
2.0 KiB
C
78 lines
2.0 KiB
C
/* SPDX-FileCopyrightText: 2001-2002 NaN Holding BV. All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#pragma once
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/** \file
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* \ingroup bli
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*/
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/* On Windows we have to include math.h before defining our own constants, to
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* avoid warnings about redefinition. This can likely be simplified later when
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* code is fully converted to C++, not defining our own constants at all. */
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#if defined(_MSC_VER) && !defined(_USE_MATH_DEFINES)
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# define _USE_MATH_DEFINES
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#endif
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#include <math.h> /* IWYU pragma: export */
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#ifndef M_PI
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# define M_PI 3.14159265358979323846 /* `pi` */
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#endif
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#ifndef M_TAU
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# define M_TAU 6.28318530717958647692 /* `tau = 2*pi` */
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#endif
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#ifndef M_PI_2
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# define M_PI_2 1.57079632679489661923 /* `pi/2` */
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#endif
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#ifndef M_PI_4
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# define M_PI_4 0.78539816339744830962 /* `pi/4` */
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#endif
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#ifndef M_SQRT2
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# define M_SQRT2 1.41421356237309504880 /* `sqrt(2)` */
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#endif
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#ifndef M_SQRT1_2
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# define M_SQRT1_2 0.70710678118654752440 /* `1/sqrt(2)` */
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#endif
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#ifndef M_SQRT3
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# define M_SQRT3 1.73205080756887729352 /* `sqrt(3)` */
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#endif
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#ifndef M_SQRT1_3
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# define M_SQRT1_3 0.57735026918962576450 /* `1/sqrt(3)` */
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#endif
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#ifndef M_1_PI
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# define M_1_PI 0.318309886183790671538 /* `1/pi` */
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#endif
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#ifndef M_E
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# define M_E 2.7182818284590452354 /* `e` */
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#endif
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#ifndef M_LOG2E
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# define M_LOG2E 1.4426950408889634074 /* `log_2 e` */
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#endif
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#ifndef M_LOG10E
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# define M_LOG10E 0.43429448190325182765 /* `log_10 e` */
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#endif
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#ifndef M_LN2
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# define M_LN2 0.69314718055994530942 /* `log_e 2` */
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#endif
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#ifndef M_LN10
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# define M_LN10 2.30258509299404568402 /* `log_e 10` */
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#endif
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#if defined(_MSC_VER) && !defined(_MATH_DEFINES_DEFINED)
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# define _MATH_DEFINES_DEFINED
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#endif
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/* -------------------------------------------------------------------- */
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/** \name Conversion Defines
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* \{ */
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#define RAD2DEG(_rad) ((_rad) * (180.0 / M_PI))
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#define DEG2RAD(_deg) ((_deg) * (M_PI / 180.0))
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#define RAD2DEGF(_rad) ((_rad) * (float)(180.0 / M_PI))
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#define DEG2RADF(_deg) ((_deg) * (float)(M_PI / 180.0))
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/** \} */
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