OK, I found why I got lost in all that... there is no file appearing in colr/ with the rules made in the code.
On 7 December 2014 at 06:51, Yann Chemin <[email protected]> wrote: > Thanks, > Will try again today. > On Dec 7, 2014 3:36 AM, "Vaclav Petras" <[email protected]> wrote: > >> >> >> On Sat, Dec 6, 2014 at 3:59 PM, Markus Metz < >> [email protected]> wrote: >> >>> Yann Chemin wrote: >>> > Hi, >>> > >>> > I am working on beautifying the output of i.theilsen, a new addon. >>> > >>> > For some reason, I cannot apply a grayscale palette. >>> > --------------- >>> > Rast_init_colors(&colors); >>> > DCELL val1 = ts_min; >>> > DCELL val2 = ceil(ts_max); >>> > Rast_add_d_color_rule(&val1, 0, 0, 0, &val2, 255, 255, 255, &colors); >>> > --------------- >>> > >>> > ts_min, ts_max are known from the data processed, >>> > val1 and val2 are declared as DCELL instead of const DCELL as required, >>> > but if I declare const DCELL val1, then I cannot write stats to it for >>> > palette definition... >>> > >>> > What I am doing wrong? >>> >>> If you declare const DCELL val1, you can not pass a pointer to val1 to >>> another function, because this other function could then easily modify >>> to contents of that pointer. >> >> >> This is of course true. >> >> >>> Rast_add_d_color_rule() requires const >>> DCELL *, not const DCELL. >>> >> >> Strange, (generated) documentation says const DCELL * [1] which fits with >> the source code [2, 3]. >> >> I haven't tried compile anything now but isn't `const DCELL` constant >> (value) and `const DCELL *` pointer to constant value. While `const DCELL * >> const` would be constant pointer to constant value. >> >> Also >> >> const DCELL val; >> const DCELL * pval = &val; >> >> should work and carry on the constness which is exactly what should be >> happening when calling the Rast_add_d_color_rule() function. >> >> So, I don't understand. >> >> Vaclav >> >> [1] >> http://grass.osgeo.org/programming7/color__rule_8c.html#a160535a46694589674f68c60eac23a05 >> [2] lib/raster/color_rule.c:35:void Rast_add_d_color_rule(const DCELL * >> val1, int r1, int g1, int b1, ... >> [3] include/defs/raster.h:198:void Rast_add_d_color_rule(const DCELL *, >> int, int, int, ... >> >> >>> Markus M >>> _______________________________________________ >>> grass-dev mailing list >>> [email protected] >>> http://lists.osgeo.org/mailman/listinfo/grass-dev >>> >> >> -- ----
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