encode_coords()

static int64_t* encode_coords ( struct geobuf_agg_context *  ctx, POINTARRAY *  pa, int64_t *  coords, int  len, int  offset  )

static

Definition at line 168 of file geobuf.c.

References geobuf_agg_context::dimensions, geobuf_agg_context::e, getPoint4d_p(), POINT4D::m, POINT4D::x, POINT4D::y, and POINT4D::z.

Referenced by encode_line(), encode_mline(), encode_mpoint(), encode_mpoly(), encode_point(), and encode_poly().

{
        int i, c;
        POINT4D pt;
        int64_t sum[] = { 0, 0, 0, 0 };

        if (offset == 0)
                coords = palloc(sizeof (int64_t) * len * ctx->dimensions);
        else
                coords = repalloc(coords, sizeof (int64_t) *
                        ((len * ctx->dimensions) + offset));

        c = offset;
        for (i = 0; i < len; i++) {
                getPoint4d_p(pa, i, &pt);
                sum[0] += coords[c++] = (int64_t) (ceil(pt.x * ctx->e) - sum[0]);
                sum[1] += coords[c++] = (int64_t) (ceil(pt.y * ctx->e) - sum[1]);
                if (ctx->dimensions == 3)
                        sum[2] += coords[c++] = (int64_t) (ceil(pt.z * ctx->e) - sum[2]);
                else if (ctx->dimensions == 4)
                        sum[3] += coords[c++] = (int64_t) (ceil(pt.m * ctx->e) - sum[3]);
        }
        return coords;
}

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