831 lines
32 KiB
C
831 lines
32 KiB
C
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Contributor(s): Campbell Barton
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file blender/blenkernel/intern/unit.c
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* \ingroup bke
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#include <assert.h>
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#include "BLI_sys_types.h"
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#include "BLI_math.h"
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#include "BLI_string.h"
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#include "BLI_string_utf8.h"
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#include "BKE_unit.h" /* own include */
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#ifdef WIN32
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# include "BLI_winstuff.h"
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#endif
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/* no BKE or DNA includes! */
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#define TEMP_STR_SIZE 256
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#define SEP_CHR '#'
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#define SEP_STR "#"
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#define EPS 0.001
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#define UN_SC_KM 1000.0f
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#define UN_SC_HM 100.0f
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#define UN_SC_DAM 10.0f
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#define UN_SC_M 1.0f
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#define UN_SC_DM 0.1f
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#define UN_SC_CM 0.01f
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#define UN_SC_MM 0.001f
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#define UN_SC_UM 0.000001f
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#define UN_SC_MI 1609.344f
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#define UN_SC_FUR 201.168f
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#define UN_SC_CH 20.1168f
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#define UN_SC_YD 0.9144f
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#define UN_SC_FT 0.3048f
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#define UN_SC_IN 0.0254f
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#define UN_SC_MIL 0.0000254f
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#define UN_SC_MTON 1000.0f /* metric ton */
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#define UN_SC_QL 100.0f
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#define UN_SC_KG 1.0f
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#define UN_SC_HG 0.1f
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#define UN_SC_DAG 0.01f
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#define UN_SC_G 0.001f
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#define UN_SC_MG 0.000001f
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#define UN_SC_ITON 907.18474f /* imperial ton */
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#define UN_SC_CWT 45.359237f
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#define UN_SC_ST 6.35029318f
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#define UN_SC_LB 0.45359237f
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#define UN_SC_OZ 0.028349523125f
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/* define a single unit */
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typedef struct bUnitDef {
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const char *name;
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const char *name_plural; /* abused a bit for the display name */
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const char *name_short; /* this is used for display*/
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const char *name_alt; /* keyboard-friendly ASCII-only version of name_short, can be NULL */
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/* if name_short has non-ASCII chars, name_alt should be present */
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const char *name_display; /* can be NULL */
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double scalar;
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double bias; /* not used yet, needed for converting temperature */
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int flag;
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} bUnitDef;
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#define B_UNIT_DEF_NONE 0
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#define B_UNIT_DEF_SUPPRESS 1 /* Use for units that are not used enough to be translated into for common use */
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#define B_UNIT_DEF_TENTH 2 /* Display a unit even if its value is 0.1, eg 0.1mm instead of 100um */
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/* define a single unit */
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typedef struct bUnitCollection {
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const struct bUnitDef *units;
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int base_unit; /* basic unit index (when user doesn't specify unit explicitly) */
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int flag; /* options for this system */
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int length; /* to quickly find the last item */
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} bUnitCollection;
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/* Dummy */
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static struct bUnitDef buDummyDef[] = { {"", NULL, "", NULL, NULL, 1.0, 0.0}, {NULL, NULL, NULL, NULL, NULL, 0.0, 0.0}};
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static struct bUnitCollection buDummyCollection = {buDummyDef, 0, 0, sizeof(buDummyDef)};
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/* Lengths */
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static const struct bUnitDef buMetricLenDef[] = {
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{"kilometer", "kilometers", "km", NULL, "Kilometers", UN_SC_KM, 0.0, B_UNIT_DEF_NONE},
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{"hectometer", "hectometers", "hm", NULL, "100 Meters", UN_SC_HM, 0.0, B_UNIT_DEF_SUPPRESS},
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{"dekameter", "dekameters", "dam", NULL, "10 Meters", UN_SC_DAM, 0.0, B_UNIT_DEF_SUPPRESS},
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{"meter", "meters", "m", NULL, "Meters", UN_SC_M, 0.0, B_UNIT_DEF_NONE}, /* base unit */
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{"decimeter", "decimeters", "dm", NULL, "10 Centimeters", UN_SC_DM, 0.0, B_UNIT_DEF_SUPPRESS},
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{"centimeter", "centimeters", "cm", NULL, "Centimeters", UN_SC_CM, 0.0, B_UNIT_DEF_NONE},
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{"millimeter", "millimeters", "mm", NULL, "Millimeters", UN_SC_MM, 0.0, B_UNIT_DEF_NONE | B_UNIT_DEF_TENTH},
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{"micrometer", "micrometers", "µm", "um", "Micrometers", UN_SC_UM, 0.0, B_UNIT_DEF_NONE},
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/* These get displayed because of float precision problems in the transform header,
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* could work around, but for now probably people wont use these */
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#if 0
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{"nanometer", "Nanometers", "nm", NULL, 0.000000001, 0.0, B_UNIT_DEF_NONE},
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{"picometer", "Picometers", "pm", NULL, 0.000000000001, 0.0, B_UNIT_DEF_NONE},
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#endif
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{NULL, NULL, NULL, NULL, NULL, 0.0, 0.0}
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};
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static const struct bUnitCollection buMetricLenCollection = {buMetricLenDef, 3, 0, sizeof(buMetricLenDef) / sizeof(bUnitDef)};
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static struct bUnitDef buImperialLenDef[] = {
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{"mile", "miles", "mi", "m", "Miles", UN_SC_MI, 0.0, B_UNIT_DEF_NONE},
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{"furlong", "furlongs", "fur", NULL, "Furlongs", UN_SC_FUR, 0.0, B_UNIT_DEF_SUPPRESS},
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{"chain", "chains", "ch", NULL, "Chains", UN_SC_CH, 0.0, B_UNIT_DEF_SUPPRESS},
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{"yard", "yards", "yd", NULL, "Yards", UN_SC_YD, 0.0, B_UNIT_DEF_SUPPRESS},
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{"foot", "feet", "'", "ft", "Feet", UN_SC_FT, 0.0, B_UNIT_DEF_NONE}, /* base unit */
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{"inch", "inches", "\"", "in", "Inches", UN_SC_IN, 0.0, B_UNIT_DEF_NONE},
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{"thou", "thou", "thou", "mil", "Thou", UN_SC_MIL, 0.0, B_UNIT_DEF_NONE}, /* plural for thou has no 's' */
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{NULL, NULL, NULL, NULL, NULL, 0.0, 0.0}
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};
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static struct bUnitCollection buImperialLenCollection = {buImperialLenDef, 4, 0, sizeof(buImperialLenDef) / sizeof(bUnitDef)};
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/* Areas */
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static struct bUnitDef buMetricAreaDef[] = {
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{"square kilometer", "square kilometers", "km²", "km2", "Square Kilometers", UN_SC_KM * UN_SC_KM, 0.0, B_UNIT_DEF_NONE},
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{"square hectometer", "square hectometers", "hm²", "hm2", "Square Hectometers", UN_SC_HM * UN_SC_HM, 0.0, B_UNIT_DEF_SUPPRESS}, /* hectare */
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{"square dekameter", "square dekameters", "dam²", "dam2", "Square Dekameters", UN_SC_DAM * UN_SC_DAM, 0.0, B_UNIT_DEF_SUPPRESS}, /* are */
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{"square meter", "square meters", "m²", "m2", "Square Meters", UN_SC_M * UN_SC_M, 0.0, B_UNIT_DEF_NONE}, /* base unit */
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{"square decimeter", "square decimetees", "dm²", "dm2", "Square Decimeters", UN_SC_DM * UN_SC_DM, 0.0, B_UNIT_DEF_SUPPRESS},
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{"square centimeter", "square centimeters", "cm²", "cm2", "Square Centimeters", UN_SC_CM * UN_SC_CM, 0.0, B_UNIT_DEF_NONE},
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{"square millimeter", "square millimeters", "mm²", "mm2", "Square Millimeters", UN_SC_MM * UN_SC_MM, 0.0, B_UNIT_DEF_NONE | B_UNIT_DEF_TENTH},
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{"square micrometer", "square micrometers", "µm²", "um2", "Square Micrometers", UN_SC_UM * UN_SC_UM, 0.0, B_UNIT_DEF_NONE},
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{NULL, NULL, NULL, NULL, NULL, 0.0, 0.0}
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};
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static struct bUnitCollection buMetricAreaCollection = {buMetricAreaDef, 3, 0, sizeof(buMetricAreaDef) / sizeof(bUnitDef)};
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static struct bUnitDef buImperialAreaDef[] = {
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{"square mile", "square miles", "sq mi", "sq m", "Square Miles", UN_SC_MI * UN_SC_MI, 0.0, B_UNIT_DEF_NONE},
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{"square furlong", "square furlongs", "sq fur", NULL, "Square Furlongs", UN_SC_FUR * UN_SC_FUR, 0.0, B_UNIT_DEF_SUPPRESS},
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{"square chain", "square chains", "sq ch", NULL, "Square Chains", UN_SC_CH * UN_SC_CH, 0.0, B_UNIT_DEF_SUPPRESS},
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{"square yard", "square yards", "sq yd", NULL, "Square Yards", UN_SC_YD * UN_SC_YD, 0.0, B_UNIT_DEF_NONE},
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{"square foot", "square feet", "sq ft", NULL, "Square Feet", UN_SC_FT * UN_SC_FT, 0.0, B_UNIT_DEF_NONE}, /* base unit */
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{"square inch", "square inches", "sq in", NULL, "Square Inches", UN_SC_IN * UN_SC_IN, 0.0, B_UNIT_DEF_NONE},
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{"square thou", "square thous", "sq mil", NULL, "Square Thous", UN_SC_MIL * UN_SC_MIL, 0.0, B_UNIT_DEF_NONE},
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{NULL, NULL, NULL, NULL, NULL, 0.0, 0.0}
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};
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static struct bUnitCollection buImperialAreaCollection = {buImperialAreaDef, 4, 0, sizeof(buImperialAreaDef) / sizeof(bUnitDef)};
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/* Volumes */
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static struct bUnitDef buMetricVolDef[] = {
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{"cubic kilometer", "cubic kilometers", "km³", "km3", "Cubic Kilometers", UN_SC_KM * UN_SC_KM * UN_SC_KM, 0.0, B_UNIT_DEF_NONE},
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{"cubic hectometer", "cubic hectometers", "hm³", "hm3", "Cubic Hectometers", UN_SC_HM * UN_SC_HM * UN_SC_HM, 0.0, B_UNIT_DEF_SUPPRESS},
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{"cubic dekameter", "cubic dekameters", "dam³", "dam3", "Cubic Dekameters", UN_SC_DAM * UN_SC_DAM * UN_SC_DAM, 0.0, B_UNIT_DEF_SUPPRESS},
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{"cubic meter", "cubic meters", "m³", "m3", "Cubic Meters", UN_SC_M * UN_SC_M * UN_SC_M, 0.0, B_UNIT_DEF_NONE}, /* base unit */
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{"cubic decimeter", "cubic decimeters", "dm³", "dm3", "Cubic Decimeters", UN_SC_DM * UN_SC_DM * UN_SC_DM, 0.0, B_UNIT_DEF_SUPPRESS},
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{"cubic centimeter", "cubic centimeters", "cm³", "cm3", "Cubic Centimeters", UN_SC_CM * UN_SC_CM * UN_SC_CM, 0.0, B_UNIT_DEF_NONE},
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{"cubic millimeter", "cubic millimeters", "mm³", "mm3", "Cubic Millimeters", UN_SC_MM * UN_SC_MM * UN_SC_MM, 0.0, B_UNIT_DEF_NONE | B_UNIT_DEF_TENTH},
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{"cubic micrometer", "cubic micrometers", "µm³", "um3", "Cubic Micrometers", UN_SC_UM * UN_SC_UM * UN_SC_UM, 0.0, B_UNIT_DEF_NONE},
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{NULL, NULL, NULL, NULL, NULL, 0.0, 0.0}
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};
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static struct bUnitCollection buMetricVolCollection = {buMetricVolDef, 3, 0, sizeof(buMetricVolDef) / sizeof(bUnitDef)};
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static struct bUnitDef buImperialVolDef[] = {
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{"cubic mile", "cubic miles", "cu mi", "cu m", "Cubic Miles", UN_SC_MI * UN_SC_MI * UN_SC_MI, 0.0, B_UNIT_DEF_NONE},
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{"cubic furlong", "cubic furlongs", "cu fur", NULL, "Cubic Furlongs", UN_SC_FUR * UN_SC_FUR * UN_SC_FUR, 0.0, B_UNIT_DEF_SUPPRESS},
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{"cubic chain", "cubic chains", "cu ch", NULL, "Cubic Chains", UN_SC_CH * UN_SC_CH * UN_SC_CH, 0.0, B_UNIT_DEF_SUPPRESS},
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{"cubic yard", "cubic yards", "cu yd", NULL, "Cubic Yards", UN_SC_YD * UN_SC_YD * UN_SC_YD, 0.0, B_UNIT_DEF_NONE},
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{"cubic foot", "cubic feet", "cu ft", NULL, "Cubic Feet", UN_SC_FT * UN_SC_FT * UN_SC_FT, 0.0, B_UNIT_DEF_NONE}, /* base unit */
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{"cubic inch", "cubic inches", "cu in", NULL, "Cubic Inches", UN_SC_IN * UN_SC_IN * UN_SC_IN, 0.0, B_UNIT_DEF_NONE},
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{"cubic thou", "cubic thous", "cu mil", NULL, "Cubic Thous", UN_SC_MIL * UN_SC_MIL * UN_SC_MIL, 0.0, B_UNIT_DEF_NONE},
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{NULL, NULL, NULL, NULL, NULL, 0.0, 0.0}
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};
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static struct bUnitCollection buImperialVolCollection = {buImperialVolDef, 4, 0, sizeof(buImperialVolDef) / sizeof(bUnitDef)};
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/* Mass */
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static struct bUnitDef buMetricMassDef[] = {
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{"ton", "tonnes", "ton", "t", "1000 Kilograms", UN_SC_MTON, 0.0, B_UNIT_DEF_NONE},
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{"quintal", "quintals", "ql", "q", "100 Kilograms", UN_SC_QL, 0.0, B_UNIT_DEF_SUPPRESS},
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{"kilogram", "kilograms", "kg", NULL, "Kilograms", UN_SC_KG, 0.0, B_UNIT_DEF_NONE}, /* base unit */
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{"hectogram", "hectograms", "hg", NULL, "Hectograms", UN_SC_HG, 0.0, B_UNIT_DEF_SUPPRESS},
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{"dekagram", "dekagrams", "dag", NULL, "10 Grams", UN_SC_DAG, 0.0, B_UNIT_DEF_SUPPRESS},
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{"gram", "grams", "g", NULL, "Grams", UN_SC_G, 0.0, B_UNIT_DEF_NONE},
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{"milligram", "milligrams", "mg", NULL, "Milligrams", UN_SC_MG, 0.0, B_UNIT_DEF_NONE},
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{NULL, NULL, NULL, NULL, NULL, 0.0, 0.0}
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};
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static struct bUnitCollection buMetricMassCollection = {buMetricMassDef, 2, 0, sizeof(buMetricMassDef) / sizeof(bUnitDef)};
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static struct bUnitDef buImperialMassDef[] = {
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{"ton", "tonnes", "ton", "t", "Tonnes", UN_SC_ITON, 0.0, B_UNIT_DEF_NONE},
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{"centum weight", "centum weights", "cwt", NULL, "Centum weights", UN_SC_CWT, 0.0, B_UNIT_DEF_NONE},
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{"stone", "stones", "st", NULL, "Stones", UN_SC_ST, 0.0, B_UNIT_DEF_NONE},
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{"pound", "pounds", "lb", NULL, "Pounds", UN_SC_LB, 0.0, B_UNIT_DEF_NONE}, /* base unit */
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{"ounce", "ounces", "oz", NULL, "Ounces", UN_SC_OZ, 0.0, B_UNIT_DEF_NONE},
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{NULL, NULL, NULL, NULL, NULL, 0.0, 0.0}
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};
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static struct bUnitCollection buImperialMassCollection = {buImperialMassDef, 3, 0, sizeof(buImperialMassDef) / sizeof(bUnitDef)};
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/* Even if user scales the system to a point where km^3 is used, velocity and
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* acceleration aren't scaled: that's why we have so few units for them */
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/* Velocity */
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static struct bUnitDef buMetricVelDef[] = {
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{"meter per second", "meters per second", "m/s", NULL, "Meters per second", UN_SC_M, 0.0, B_UNIT_DEF_NONE}, /* base unit */
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{"kilometer per hour", "kilometers per hour", "km/h", NULL, "Kilometers per hour", UN_SC_KM / 3600.0f, 0.0, B_UNIT_DEF_SUPPRESS},
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{NULL, NULL, NULL, NULL, NULL, 0.0, 0.0}
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};
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static struct bUnitCollection buMetricVelCollection = {buMetricVelDef, 0, 0, sizeof(buMetricVelDef) / sizeof(bUnitDef)};
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static struct bUnitDef buImperialVelDef[] = {
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{"foot per second", "feet per second", "ft/s", "fps", "Feet per second", UN_SC_FT, 0.0, B_UNIT_DEF_NONE}, /* base unit */
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{"mile per hour", "miles per hour", "mph", NULL, "Miles per hour", UN_SC_MI / 3600.0f, 0.0, B_UNIT_DEF_SUPPRESS},
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{NULL, NULL, NULL, NULL, NULL, 0.0, 0.0}
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};
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static struct bUnitCollection buImperialVelCollection = {buImperialVelDef, 0, 0, sizeof(buImperialVelDef) / sizeof(bUnitDef)};
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/* Acceleration */
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static struct bUnitDef buMetricAclDef[] = {
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{"meter per second squared", "meters per second squared", "m/s²", "m/s2", "Meters per second squared", UN_SC_M, 0.0, B_UNIT_DEF_NONE}, /* base unit */
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{NULL, NULL, NULL, NULL, NULL, 0.0, 0.0}
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};
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static struct bUnitCollection buMetricAclCollection = {buMetricAclDef, 0, 0, sizeof(buMetricAclDef) / sizeof(bUnitDef)};
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static struct bUnitDef buImperialAclDef[] = {
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{"foot per second squared", "feet per second squared", "ft/s²", "ft/s2", "Feet per second squared", UN_SC_FT, 0.0, B_UNIT_DEF_NONE}, /* base unit */
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{NULL, NULL, NULL, NULL, NULL, 0.0, 0.0}
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};
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static struct bUnitCollection buImperialAclCollection = {buImperialAclDef, 0, 0, sizeof(buImperialAclDef) / sizeof(bUnitDef)};
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/* Time */
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static struct bUnitDef buNaturalTimeDef[] = {
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/* weeks? - probably not needed for blender */
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{"day", "days", "d", NULL, "Days", 90000.0, 0.0, B_UNIT_DEF_NONE},
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{"hour", "hours", "hr", "h", "Hours", 3600.0, 0.0, B_UNIT_DEF_NONE},
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{"minute", "minutes", "min", "m", "Minutes", 60.0, 0.0, B_UNIT_DEF_NONE},
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{"second", "seconds", "sec", "s", "Seconds", 1.0, 0.0, B_UNIT_DEF_NONE}, /* base unit */
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{"millisecond", "milliseconds", "ms", NULL, "Milliseconds", 0.001, 0.0, B_UNIT_DEF_NONE},
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{"microsecond", "microseconds", "µs", "us", "Microseconds", 0.000001, 0.0, B_UNIT_DEF_NONE},
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{NULL, NULL, NULL, NULL, NULL, 0.0, 0.0}
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};
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static struct bUnitCollection buNaturalTimeCollection = {buNaturalTimeDef, 3, 0, sizeof(buNaturalTimeDef) / sizeof(bUnitDef)};
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static struct bUnitDef buNaturalRotDef[] = {
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{"degree", "degrees", "°", "d", "Degrees", M_PI / 180.0, 0.0, B_UNIT_DEF_NONE},
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/* arcminutes/arcseconds are used in Astronomy/Navigation areas... */
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{"arcminute", "arcminutes", "'", NULL, "Arcminutes", (M_PI / 180.0) / 60.0, 0.0, B_UNIT_DEF_SUPPRESS},
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{"arcsecond", "arcseconds", "\"", NULL, "Arcseconds", (M_PI / 180.0) / 3600.0, 0.0, B_UNIT_DEF_SUPPRESS},
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{"radian", "radians", "r", NULL, "Radians", 1.0, 0.0, B_UNIT_DEF_NONE},
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// {"turn", "turns", "t", NULL, "Turns", 1.0 / (M_PI * 2.0), 0.0, B_UNIT_DEF_NONE},
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{NULL, NULL, NULL, NULL, NULL, 0.0, 0.0}
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};
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static struct bUnitCollection buNaturalRotCollection = {buNaturalRotDef, 0, 0, sizeof(buNaturalRotDef) / sizeof(bUnitDef)};
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/* Camera Lengths */
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static struct bUnitDef buCameraLenDef[] = {
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{"meter", "meters", "m", NULL, "Meters", UN_SC_KM, 0.0, B_UNIT_DEF_NONE}, /* base unit */
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{"decimeter", "decimeters", "dm", NULL, "10 Centimeters", UN_SC_HM, 0.0, B_UNIT_DEF_SUPPRESS},
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{"centimeter", "centimeters", "cm", NULL, "Centimeters", UN_SC_DAM, 0.0, B_UNIT_DEF_SUPPRESS},
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{"millimeter", "millimeters", "mm", NULL, "Millimeters", UN_SC_M, 0.0, B_UNIT_DEF_NONE},
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{"micrometer", "micrometers", "µm", "um", "Micrometers", UN_SC_MM, 0.0, B_UNIT_DEF_SUPPRESS},
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{NULL, NULL, NULL, NULL, NULL, 0.0, 0.0}
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};
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static struct bUnitCollection buCameraLenCollection = {buCameraLenDef, 3, 0, sizeof(buCameraLenDef) / sizeof(bUnitDef)};
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#define UNIT_SYSTEM_TOT (((sizeof(bUnitSystems) / B_UNIT_TYPE_TOT) / sizeof(void *)) - 1)
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static const struct bUnitCollection *bUnitSystems[][B_UNIT_TYPE_TOT] = {
|
|
{NULL, NULL, NULL, NULL, NULL, &buNaturalRotCollection, &buNaturalTimeCollection, NULL, NULL, NULL},
|
|
{NULL, &buMetricLenCollection, &buMetricAreaCollection, &buMetricVolCollection, &buMetricMassCollection, &buNaturalRotCollection, &buNaturalTimeCollection, &buMetricVelCollection, &buMetricAclCollection, &buCameraLenCollection}, /* metric */
|
|
{NULL, &buImperialLenCollection, &buImperialAreaCollection, &buImperialVolCollection, &buImperialMassCollection, &buNaturalRotCollection, &buNaturalTimeCollection, &buImperialVelCollection, &buImperialAclCollection, &buCameraLenCollection}, /* imperial */
|
|
{NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL}
|
|
};
|
|
|
|
|
|
|
|
/* internal, has some option not exposed */
|
|
static const bUnitCollection *unit_get_system(int system, int type)
|
|
{
|
|
assert((system > -1) && (system < UNIT_SYSTEM_TOT) && (type > -1) && (type < B_UNIT_TYPE_TOT));
|
|
return bUnitSystems[system][type]; /* select system to use, metric/imperial/other? */
|
|
}
|
|
|
|
static const bUnitDef *unit_default(const bUnitCollection *usys)
|
|
{
|
|
return &usys->units[usys->base_unit];
|
|
}
|
|
|
|
static const bUnitDef *unit_best_fit(
|
|
double value, const bUnitCollection *usys, const bUnitDef *unit_start, int suppress)
|
|
{
|
|
const bUnitDef *unit;
|
|
double value_abs = value > 0.0 ? value : -value;
|
|
|
|
for (unit = unit_start ? unit_start : usys->units; unit->name; unit++) {
|
|
|
|
if (suppress && (unit->flag & B_UNIT_DEF_SUPPRESS))
|
|
continue;
|
|
|
|
/* scale down scalar so 1cm doesnt convert to 10mm because of float error */
|
|
if (UNLIKELY(unit->flag & B_UNIT_DEF_TENTH)) {
|
|
if (value_abs >= unit->scalar * (0.1 - EPS)) {
|
|
return unit;
|
|
}
|
|
}
|
|
else {
|
|
if (value_abs >= unit->scalar * (1.0 - EPS)) {
|
|
return unit;
|
|
}
|
|
}
|
|
}
|
|
|
|
return unit_default(usys);
|
|
}
|
|
|
|
/* convert into 2 units and 2 values for "2ft, 3inch" syntax */
|
|
static void unit_dual_convert(
|
|
double value, const bUnitCollection *usys,
|
|
bUnitDef const **r_unit_a, bUnitDef const **r_unit_b,
|
|
double *r_value_a, double *r_value_b)
|
|
{
|
|
const bUnitDef *unit = unit_best_fit(value, usys, NULL, 1);
|
|
|
|
*r_value_a = (value < 0.0 ? ceil : floor)(value / unit->scalar) * unit->scalar;
|
|
*r_value_b = value - (*r_value_a);
|
|
|
|
*r_unit_a = unit;
|
|
*r_unit_b = unit_best_fit(*r_value_b, usys, *r_unit_a, 1);
|
|
}
|
|
|
|
static size_t unit_as_string(char *str, int len_max, double value, int prec, const bUnitCollection *usys,
|
|
/* non exposed options */
|
|
const bUnitDef *unit, char pad)
|
|
{
|
|
double value_conv;
|
|
size_t len, i;
|
|
|
|
if (unit) {
|
|
/* use unit without finding the best one */
|
|
}
|
|
else if (value == 0.0) {
|
|
/* use the default units since there is no way to convert */
|
|
unit = unit_default(usys);
|
|
}
|
|
else {
|
|
unit = unit_best_fit(value, usys, NULL, 1);
|
|
}
|
|
|
|
value_conv = value / unit->scalar;
|
|
|
|
/* Convert to a string */
|
|
len = BLI_snprintf_rlen(str, len_max, "%.*f", prec, value_conv);
|
|
|
|
/* Add unit prefix and strip zeros */
|
|
|
|
/* replace trailing zero's with spaces
|
|
* so the number is less complicated but alignment in a button wont
|
|
* jump about while dragging */
|
|
i = len - 1;
|
|
|
|
if (prec > 0) {
|
|
while (i > 0 && str[i] == '0') { /* 4.300 -> 4.3 */
|
|
str[i--] = pad;
|
|
}
|
|
|
|
if (i > 0 && str[i] == '.') { /* 10. -> 10 */
|
|
str[i--] = pad;
|
|
}
|
|
}
|
|
|
|
/* Now add the suffix */
|
|
if (i < len_max) {
|
|
int j = 0;
|
|
i++;
|
|
while (unit->name_short[j] && (i < len_max)) {
|
|
str[i++] = unit->name_short[j++];
|
|
}
|
|
#if 0
|
|
if (pad) {
|
|
/* this loop only runs if so many zeros were removed that
|
|
* the unit name only used padded chars,
|
|
* In that case add padding for the name. */
|
|
|
|
while (i <= len + j && (i < len_max)) {
|
|
str[i++] = pad;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* terminate no matter whats done with padding above */
|
|
if (i >= len_max)
|
|
i = len_max - 1;
|
|
|
|
str[i] = '\0';
|
|
return i;
|
|
}
|
|
|
|
/* Used for drawing number buttons, try keep fast.
|
|
* Return the length of the generated string.
|
|
*/
|
|
size_t bUnit_AsString(char *str, int len_max, double value, int prec, int system, int type, bool split, bool pad)
|
|
{
|
|
const bUnitCollection *usys = unit_get_system(system, type);
|
|
|
|
if (usys == NULL || usys->units[0].name == NULL)
|
|
usys = &buDummyCollection;
|
|
|
|
/* split output makes sense only for length, mass and time */
|
|
if (split && (type == B_UNIT_LENGTH || type == B_UNIT_MASS || type == B_UNIT_TIME || type == B_UNIT_CAMERA)) {
|
|
const bUnitDef *unit_a, *unit_b;
|
|
double value_a, value_b;
|
|
|
|
unit_dual_convert(value, usys, &unit_a, &unit_b, &value_a, &value_b);
|
|
|
|
/* check the 2 is a smaller unit */
|
|
if (unit_b > unit_a) {
|
|
size_t i;
|
|
i = unit_as_string(str, len_max, value_a, prec, usys, unit_a, '\0');
|
|
|
|
/* is there enough space for at least 1 char of the next unit? */
|
|
if (i + 2 < len_max) {
|
|
str[i++] = ' ';
|
|
|
|
/* use low precision since this is a smaller unit */
|
|
i += unit_as_string(str + i, len_max - i, value_b, prec ? 1 : 0, usys, unit_b, '\0');
|
|
}
|
|
return i;
|
|
}
|
|
}
|
|
|
|
return unit_as_string(str, len_max, value, prec, usys, NULL, pad ? ' ' : '\0');
|
|
}
|
|
|
|
BLI_INLINE bool isalpha_or_utf8(const int ch)
|
|
{
|
|
return (ch >= 128 || isalpha(ch));
|
|
}
|
|
|
|
static const char *unit_find_str(const char *str, const char *substr)
|
|
{
|
|
if (substr && substr[0] != '\0') {
|
|
while (true) {
|
|
const char *str_found = strstr(str, substr);
|
|
|
|
if (str_found) {
|
|
/* Previous char cannot be a letter. */
|
|
if (str_found == str ||
|
|
/* weak unicode support!, so "µm" won't match up be replaced by "m"
|
|
* since non ascii utf8 values will NEVER return true */
|
|
isalpha_or_utf8(*BLI_str_prev_char_utf8(str_found)) == 0)
|
|
{
|
|
/* next char cannot be alphanum */
|
|
int len_name = strlen(substr);
|
|
|
|
if (!isalpha_or_utf8(*(str_found + len_name))) {
|
|
return str_found;
|
|
}
|
|
}
|
|
/* If str_found is not a valid unit, we have to check further in the string... */
|
|
for (str_found++; isalpha_or_utf8(*str_found); str_found++);
|
|
str = str_found;
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* Note that numbers are added within brackets
|
|
* ") " - is used to detect numbers we added so we can detect if commas need to be added
|
|
*
|
|
* "1m1cm+2mm" - Original value
|
|
* "1*1#1*0.01#+2*0.001#" - Replace numbers
|
|
* "1*1+1*0.01 +2*0.001 " - Add add signs if ( + - * / | & ~ < > ^ ! = % ) not found in between
|
|
*
|
|
*/
|
|
|
|
/* not too strict, (+ - * /) are most common */
|
|
static bool ch_is_op(char op)
|
|
{
|
|
switch (op) {
|
|
case '+':
|
|
case '-':
|
|
case '*':
|
|
case '/':
|
|
case '|':
|
|
case '&':
|
|
case '~':
|
|
case '<':
|
|
case '>':
|
|
case '^':
|
|
case '!':
|
|
case '=':
|
|
case '%':
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static int unit_scale_str(char *str, int len_max, char *str_tmp, double scale_pref, const bUnitDef *unit,
|
|
const char *replace_str)
|
|
{
|
|
char *str_found;
|
|
|
|
if ((len_max > 0) && (str_found = (char *)unit_find_str(str, replace_str))) {
|
|
/* XXX - investigate, does not respect len_max properly */
|
|
|
|
int len, len_num, len_name, len_move, found_ofs;
|
|
|
|
found_ofs = (int)(str_found - str);
|
|
|
|
len = strlen(str);
|
|
|
|
len_name = strlen(replace_str);
|
|
len_move = (len - (found_ofs + len_name)) + 1; /* 1+ to copy the string terminator */
|
|
len_num = BLI_snprintf(str_tmp, TEMP_STR_SIZE, "*%.9g"SEP_STR, unit->scalar / scale_pref); /* # removed later */
|
|
|
|
if (len_num > len_max)
|
|
len_num = len_max;
|
|
|
|
if (found_ofs + len_num + len_move > len_max) {
|
|
/* can't move the whole string, move just as much as will fit */
|
|
len_move -= (found_ofs + len_num + len_move) - len_max;
|
|
}
|
|
|
|
if (len_move > 0) {
|
|
/* resize the last part of the string */
|
|
memmove(str_found + len_num, str_found + len_name, len_move); /* may grow or shrink the string */
|
|
}
|
|
|
|
if (found_ofs + len_num > len_max) {
|
|
/* not even the number will fit into the string, only copy part of it */
|
|
len_num -= (found_ofs + len_num) - len_max;
|
|
}
|
|
|
|
if (len_num > 0) {
|
|
/* its possible none of the number could be copied in */
|
|
memcpy(str_found, str_tmp, len_num); /* without the string terminator */
|
|
}
|
|
|
|
/* since the null terminator wont be moved if the stringlen_max
|
|
* was not long enough to fit everything in it */
|
|
str[len_max - 1] = '\0';
|
|
return found_ofs + len_num;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int unit_replace(char *str, int len_max, char *str_tmp, double scale_pref, const bUnitDef *unit)
|
|
{
|
|
int ofs = 0;
|
|
ofs += unit_scale_str(str + ofs, len_max - ofs, str_tmp, scale_pref, unit, unit->name_short);
|
|
ofs += unit_scale_str(str + ofs, len_max - ofs, str_tmp, scale_pref, unit, unit->name_plural);
|
|
ofs += unit_scale_str(str + ofs, len_max - ofs, str_tmp, scale_pref, unit, unit->name_alt);
|
|
ofs += unit_scale_str(str + ofs, len_max - ofs, str_tmp, scale_pref, unit, unit->name);
|
|
return ofs;
|
|
}
|
|
|
|
static bool unit_find(const char *str, const bUnitDef *unit)
|
|
{
|
|
if (unit_find_str(str, unit->name_short)) return true;
|
|
if (unit_find_str(str, unit->name_plural)) return true;
|
|
if (unit_find_str(str, unit->name_alt)) return true;
|
|
if (unit_find_str(str, unit->name)) return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static const bUnitDef *unit_detect_from_str(const bUnitCollection *usys, const char *str, const char *str_prev)
|
|
{
|
|
/* Try to find a default unit from current or previous string.
|
|
* This allows us to handle cases like 2 + 2mm, people would expect to get 4mm, not 2.002m!
|
|
* Note this does not handle corner cases like 2 + 2cm + 1 + 2.5mm... We can't support everything. */
|
|
const bUnitDef *unit = NULL;
|
|
|
|
/* see which units the new value has */
|
|
for (unit = usys->units; unit->name; unit++) {
|
|
if (unit_find(str, unit))
|
|
break;
|
|
}
|
|
/* Else, try to infer the default unit from the previous string. */
|
|
if (str_prev && (unit == NULL || unit->name == NULL)) {
|
|
/* see which units the original value had */
|
|
for (unit = usys->units; unit->name; unit++) {
|
|
if (unit_find(str_prev, unit))
|
|
break;
|
|
}
|
|
}
|
|
/* Else, fall back to default unit. */
|
|
if (unit == NULL || unit->name == NULL) {
|
|
unit = unit_default(usys);
|
|
}
|
|
|
|
return unit;
|
|
}
|
|
|
|
/* make a copy of the string that replaces the units with numbers
|
|
* this is used before parsing
|
|
* This is only used when evaluating user input and can afford to be a bit slower
|
|
*
|
|
* This is to be used before python evaluation so..
|
|
* 10.1km -> 10.1*1000.0
|
|
* ...will be resolved by python.
|
|
*
|
|
* values will be split by an add sign
|
|
* 5'2" -> 5*0.3048 + 2*0.0254
|
|
*
|
|
* str_prev is optional, when valid it is used to get a base unit when none is set.
|
|
*
|
|
* return true of a change was made.
|
|
*/
|
|
bool bUnit_ReplaceString(char *str, int len_max, const char *str_prev, double scale_pref, int system, int type)
|
|
{
|
|
const bUnitCollection *usys = unit_get_system(system, type);
|
|
|
|
const bUnitDef *unit = NULL, *default_unit;
|
|
double scale_pref_base = scale_pref;
|
|
char str_tmp[TEMP_STR_SIZE];
|
|
bool changed = false;
|
|
|
|
if (usys == NULL || usys->units[0].name == NULL) {
|
|
return changed;
|
|
}
|
|
|
|
/* make lowercase */
|
|
BLI_str_tolower_ascii(str, len_max);
|
|
|
|
/* Try to find a default unit from current or previous string. */
|
|
default_unit = unit_detect_from_str(usys, str, str_prev);
|
|
|
|
/* We apply the default unit to the whole expression (default unit is now the reference '1.0' one). */
|
|
scale_pref_base *= default_unit->scalar;
|
|
|
|
/* Apply the default unit on the whole expression, this allows to handle nasty cases like '2+2in'. */
|
|
if (BLI_snprintf(str_tmp, sizeof(str_tmp), "(%s)*%.9g", str, default_unit->scalar) < sizeof(str_tmp)) {
|
|
strncpy(str, str_tmp, len_max);
|
|
}
|
|
else {
|
|
/* BLI_snprintf would not fit into str_tmp, cant do much in this case
|
|
* check for this because otherwise bUnit_ReplaceString could call its self forever */
|
|
return changed;
|
|
}
|
|
|
|
for (unit = usys->units; unit->name; unit++) {
|
|
/* in case there are multiple instances */
|
|
while (unit_replace(str, len_max, str_tmp, scale_pref_base, unit))
|
|
changed = true;
|
|
}
|
|
unit = NULL;
|
|
|
|
{
|
|
/* try other unit systems now, so we can evaluate imperial when metric is set for eg. */
|
|
/* Note that checking other systems at that point means we do not support their units as 'default' one.
|
|
* In other words, when in metrics, typing '2+2in' will give 2 meters 2 inches, not 4 inches.
|
|
* I do think this is the desired behavior!
|
|
*/
|
|
const bUnitCollection *usys_iter;
|
|
int system_iter;
|
|
|
|
for (system_iter = 0; system_iter < UNIT_SYSTEM_TOT; system_iter++) {
|
|
if (system_iter != system) {
|
|
usys_iter = unit_get_system(system_iter, type);
|
|
if (usys_iter) {
|
|
for (unit = usys_iter->units; unit->name; unit++) {
|
|
int ofs = 0;
|
|
/* in case there are multiple instances */
|
|
while ((ofs = unit_replace(str + ofs, len_max - ofs, str_tmp, scale_pref_base, unit)))
|
|
changed = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
unit = NULL;
|
|
|
|
/* replace # with add sign when there is no operator between it and the next number
|
|
*
|
|
* "1*1# 3*100# * 3" -> "1*1+ 3*100 * 3"
|
|
*
|
|
* */
|
|
{
|
|
char *str_found = str;
|
|
const char *ch = str;
|
|
|
|
while ((str_found = strchr(str_found, SEP_CHR))) {
|
|
bool op_found = false;
|
|
|
|
/* any operators after this? */
|
|
for (ch = str_found + 1; *ch != '\0'; ch++) {
|
|
if (*ch == ' ' || *ch == '\t') {
|
|
continue;
|
|
}
|
|
op_found = (ch_is_op(*ch) || ELEM(*ch, ',', ')'));
|
|
break;
|
|
}
|
|
|
|
/* If found an op, comma or closing parenthesis, no need to insert a '+', else we need it. */
|
|
*str_found++ = op_found ? ' ' : '+';
|
|
}
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
/* 45µm --> 45um */
|
|
void bUnit_ToUnitAltName(char *str, int len_max, const char *orig_str, int system, int type)
|
|
{
|
|
const bUnitCollection *usys = unit_get_system(system, type);
|
|
|
|
const bUnitDef *unit;
|
|
|
|
/* find and substitute all units */
|
|
for (unit = usys->units; unit->name; unit++) {
|
|
if (len_max > 0 && unit->name_alt) {
|
|
const char *found = unit_find_str(orig_str, unit->name_short);
|
|
if (found) {
|
|
int offset = (int)(found - orig_str);
|
|
int len_name = 0;
|
|
|
|
/* copy everything before the unit */
|
|
offset = (offset < len_max ? offset : len_max);
|
|
strncpy(str, orig_str, offset);
|
|
|
|
str += offset;
|
|
orig_str += offset + strlen(unit->name_short);
|
|
len_max -= offset;
|
|
|
|
/* print the alt_name */
|
|
if (unit->name_alt)
|
|
len_name = BLI_strncpy_rlen(str, unit->name_alt, len_max);
|
|
else
|
|
len_name = 0;
|
|
|
|
len_name = (len_name < len_max ? len_name : len_max);
|
|
str += len_name;
|
|
len_max -= len_name;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* finally copy the rest of the string */
|
|
strncpy(str, orig_str, len_max);
|
|
}
|
|
|
|
double bUnit_ClosestScalar(double value, int system, int type)
|
|
{
|
|
const bUnitCollection *usys = unit_get_system(system, type);
|
|
const bUnitDef *unit;
|
|
|
|
if (usys == NULL)
|
|
return -1;
|
|
|
|
unit = unit_best_fit(value, usys, NULL, 1);
|
|
if (unit == NULL)
|
|
return -1;
|
|
|
|
return unit->scalar;
|
|
}
|
|
|
|
double bUnit_BaseScalar(int system, int type)
|
|
{
|
|
const bUnitCollection *usys = unit_get_system(system, type);
|
|
return unit_default(usys)->scalar;
|
|
}
|
|
|
|
/* external access */
|
|
bool bUnit_IsValid(int system, int type)
|
|
{
|
|
return !(system < 0 || system > UNIT_SYSTEM_TOT || type < 0 || type > B_UNIT_TYPE_TOT);
|
|
}
|
|
|
|
void bUnit_GetSystem(int system, int type, void const **r_usys_pt, int *r_len)
|
|
{
|
|
const bUnitCollection *usys = unit_get_system(system, type);
|
|
*r_usys_pt = usys;
|
|
|
|
if (usys == NULL) {
|
|
*r_len = 0;
|
|
return;
|
|
}
|
|
|
|
*r_len = usys->length;
|
|
}
|
|
|
|
int bUnit_GetBaseUnit(const void *usys_pt)
|
|
{
|
|
return ((bUnitCollection *)usys_pt)->base_unit;
|
|
}
|
|
|
|
const char *bUnit_GetName(const void *usys_pt, int index)
|
|
{
|
|
return ((bUnitCollection *)usys_pt)->units[index].name;
|
|
}
|
|
const char *bUnit_GetNameDisplay(const void *usys_pt, int index)
|
|
{
|
|
return ((bUnitCollection *)usys_pt)->units[index].name_display;
|
|
}
|
|
|
|
double bUnit_GetScaler(const void *usys_pt, int index)
|
|
{
|
|
return ((bUnitCollection *)usys_pt)->units[index].scalar;
|
|
}
|