+static void SetGlobalAnimPartTileXY(struct GlobalAnimPartControlInfo *part)
+{
+ // calculate playfield position (with scrolling) for related CE tile
+ // (do not use FX/FY, which are incorrect during envelope requests)
+ int FX0 = 2 * TILEX_VAR; // same as FX during DRAW_TO_FIELDBUFFER
+ int FY0 = 2 * TILEY_VAR; // same as FY during DRAW_TO_FIELDBUFFER
+ int fx = getFieldbufferOffsetX_RND(ScreenMovDir, ScreenGfxPos);
+ int fy = getFieldbufferOffsetY_RND(ScreenMovDir, ScreenGfxPos);
+ int sx = FX0 + SCREENX(part->tile_x) * TILEX_VAR;
+ int sy = FY0 + SCREENY(part->tile_y) * TILEY_VAR;
+ int cx = SX - REAL_SX;
+ int cy = SY - REAL_SY;
+ int x = sx - fx + cx;
+ int y = sy - fy + cy;
+
+ part->tile_xoffset += part->step_xoffset;
+ part->tile_yoffset += part->step_yoffset;
+
+ part->x = x + part->tile_xoffset;
+ part->y = y + part->tile_yoffset;
+}
+