test_raster_get_pixel_bilinear()

static void test_raster_get_pixel_bilinear ( )

static

Definition at line 579 of file cu_raster_geometry.c.

                                             {
        uint32_t width = 2;
        uint32_t height = 2;
        double ul_x = 0.0;
        double ul_y = 0.0;
        double scale_x = 1;
        double scale_y = 1;
        int err;
 
        double xr, yr;
        double igt[6];
 
        rt_raster rast = rt_raster_new(width, height);
        rt_raster_set_offsets(rast, ul_x, ul_y);
        rt_raster_set_scale(rast, scale_x, scale_y);
 
        double xw = 1.5, yw = 0.5;
 
        rt_raster_generate_new_band(
                rast,    // rt_raster raster,
                PT_64BF, // rt_pixtype pixtype,
                1.0,    // double initialvalue,
                1,       // uint32_t hasnodata,
                -99.0,   // double nodatavalue,
                0        // int index
        );
 
        rt_raster_geopoint_to_rasterpoint(
                rast,
                xw, yw,
                &xr, &yr, igt);
 
        printf("xw = %g, yw = %g, xr = %g, yr = %g\n", xw, yw, xr, yr);
 
        // err = rt_raster_cell_to_geopoint(
        //      rast,
        //      xr, yr,
        //      &xw, &yw, igt);
 
        // printf("xw = %g, yw = %g, xr = %g, yr = %g\n", xw, yw, xr, yr);
 
        rt_band band = rt_raster_get_band(rast, 0);
        rt_band_set_pixel(band, 0, 0, 10.0, NULL);
        rt_band_set_pixel(band, 0, 1, 10.0, NULL);
        rt_band_set_pixel(band, 1, 0, 20.0, NULL);
        rt_band_set_pixel(band, 1, 1, 40.0, NULL);
 
 
        double value = 0.0;
        int nodata = 0;
        err = rt_band_get_pixel_bilinear(
                band,
                xw, yw, // double xw, double yw,
                &value, &nodata // double *r_value, int *r_nodata)
                );
 
        CU_ASSERT_EQUAL(err, ES_NONE);
        printf("xw = %g, yw = %g, value = %g, nodata = %d\n", xr, yr, value, nodata);
 
 
}

References ovdump::band, ES_NONE, PT_64BF, rtpixdump::rast, rt_band_get_pixel_bilinear(), rt_band_set_pixel(), rt_raster_generate_new_band(), rt_raster_geopoint_to_rasterpoint(), rt_raster_get_band(), rt_raster_new(), rt_raster_set_offsets(), rt_raster_set_scale(), and genraster::value.

Referenced by raster_geometry_suite_setup().

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