+inline static int get_effective_element_EM(int tile, int frame_em)
+{
+ int element = object_mapping[tile].element_rnd;
+ int action = object_mapping[tile].action;
+ boolean is_backside = object_mapping[tile].is_backside;
+ boolean action_removing = (action == ACTION_DIGGING ||
+ action == ACTION_SNAPPING ||
+ action == ACTION_COLLECTING);
+
+ if (frame_em < 7)
+ {
+ switch (tile)
+ {
+ case Yacid_splash_eB:
+ case Yacid_splash_wB:
+ return (frame_em > 5 ? EL_EMPTY : element);
+
+ default:
+ return element;
+ }
+ }
+ else /* frame_em == 7 */
+ {
+ switch (tile)
+ {
+ case Yacid_splash_eB:
+ case Yacid_splash_wB:
+ return EL_EMPTY;
+
+ case Yemerald_stone:
+ return EL_EMERALD;
+
+ case Ydiamond_stone:
+ return EL_ROCK;
+
+ case Xdrip_stretch:
+ case Xdrip_stretchB:
+ case Ydrip_s1:
+ case Ydrip_s1B:
+ case Xball_1B:
+ case Xball_2:
+ case Xball_2B:
+ case Yball_eat:
+ case Ykey_1_eat:
+ case Ykey_2_eat:
+ case Ykey_3_eat:
+ case Ykey_4_eat:
+ case Ykey_5_eat:
+ case Ykey_6_eat:
+ case Ykey_7_eat:
+ case Ykey_8_eat:
+ case Ylenses_eat:
+ case Ymagnify_eat:
+ case Ygrass_eat:
+ case Ydirt_eat:
+ case Xsand_stonein_1:
+ case Xsand_stonein_2:
+ case Xsand_stonein_3:
+ case Xsand_stonein_4:
+ return element;
+
+ default:
+ return (is_backside || action_removing ? EL_EMPTY : element);
+ }
+ }
+}
+
+inline static boolean check_linear_animation_EM(int tile)
+{
+ switch (tile)
+ {
+ case Xsand_stonesand_1:
+ case Xsand_stonesand_quickout_1:
+ case Xsand_sandstone_1:
+ case Xsand_stonein_1:
+ case Xsand_stoneout_1:
+ case Xboom_1:
+ case Xdynamite_1:
+ case Ybug_w_n:
+ case Ybug_n_e:
+ case Ybug_e_s:
+ case Ybug_s_w:
+ case Ybug_e_n:
+ case Ybug_s_e:
+ case Ybug_w_s:
+ case Ybug_n_w:
+ case Ytank_w_n:
+ case Ytank_n_e:
+ case Ytank_e_s:
+ case Ytank_s_w:
+ case Ytank_e_n:
+ case Ytank_s_e:
+ case Ytank_w_s:
+ case Ytank_n_w:
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+inline static void set_crumbled_graphics_EM(struct GraphicInfo_EM *g_em,
+ boolean has_crumbled_graphics,
+ int crumbled, int sync_frame)
+{
+ /* if element can be crumbled, but certain action graphics are just empty
+ space (like instantly snapping sand to empty space in 1 frame), do not
+ treat these empty space graphics as crumbled graphics in EMC engine */
+ if (crumbled == IMG_EMPTY_SPACE)
+ has_crumbled_graphics = FALSE;
+
+ if (has_crumbled_graphics)
+ {
+ struct GraphicInfo *g_crumbled = &graphic_info[crumbled];
+ int frame_crumbled = getAnimationFrame(g_crumbled->anim_frames,
+ g_crumbled->anim_delay,
+ g_crumbled->anim_mode,
+ g_crumbled->anim_start_frame,
+ sync_frame);
+
+ getGraphicSource(crumbled, frame_crumbled, &g_em->crumbled_bitmap,
+ &g_em->crumbled_src_x, &g_em->crumbled_src_y);
+
+ g_em->crumbled_border_size = graphic_info[crumbled].border_size;
+
+ g_em->has_crumbled_graphics = TRUE;
+ }
+ else
+ {
+ g_em->crumbled_bitmap = NULL;
+ g_em->crumbled_src_x = 0;
+ g_em->crumbled_src_y = 0;
+ g_em->crumbled_border_size = 0;
+
+ g_em->has_crumbled_graphics = FALSE;
+ }
+}
+