GRASS Programmer's Manual 6.4.1(2011)
color_range.c
Go to the documentation of this file.
00001 #include <math.h>
00002 #include <grass/gis.h>
00003 
00004 int G_set_color_range(CELL min, CELL max, struct Colors *colors)
00005 {
00006     if (min < max) {
00007         colors->cmin = (DCELL) min;
00008         colors->cmax = (DCELL) max;
00009     }
00010     else {
00011         colors->cmin = (DCELL) max;
00012         colors->cmax = (DCELL) min;
00013     }
00014 
00015     return 0;
00016 }
00017 
00018 int G_set_d_color_range(DCELL min, DCELL max, struct Colors *colors)
00019 {
00020     if (min < max) {
00021         colors->cmin = min;
00022         colors->cmax = max;
00023     }
00024     else {
00025         colors->cmin = max;
00026         colors->cmax = min;
00027     }
00028 
00029     return 0;
00030 }
00031 
00032 /* returns min and max category in the range or huge numbers
00033    if the co,lor table is defined on floating cell values and
00034    not on categories */
00035 
00036 
00044 int G_get_color_range(CELL * min, CELL * max, const struct Colors *colors)
00045 {
00046     if (!colors->is_float) {
00047         *min = (CELL) floor(colors->cmin);
00048         *max = (CELL) ceil(colors->cmax);
00049     }
00050     else {
00051         *min = -255 * 255 * 255;
00052         *max = 255 * 255 * 255;
00053     }
00054 
00055     return 0;
00056 }
00057 
00058 /* returns min and max values in the range */
00059 int G_get_d_color_range(DCELL * min, DCELL * max, const struct Colors *colors)
00060 {
00061     *min = colors->cmin;
00062     *max = colors->cmax;
00063 
00064     return 0;
00065 }
 All Data Structures Files Functions Variables Typedefs Enumerations Enumerator Defines