+#define FLAG_TRIGGERED 0x200
+#define FLAG_FLIP_ROTATING 0x400
+#define FLAG_TARGETED 0x800
+
+/*
+ 0000 0 | 0001 1 | 0010 2 | 0011 3
+ | | | | |
+ X | X= | X | X=
+ | | |
+ 0100 4 | 0101 5 | 0110 6 | 0111 7
+ | | | | |
+ =X | =X= | =X | =X=
+ | | |
+ 1000 8 | 1001 9 | 1010 10 | 1011 11
+ | | | | |
+ X | X= | X | X=
+ | | | | | | |
+ 1100 12 | 1101 13 | 1110 14 | 1111 15
+ | | | | |
+ =X | =X= | =X | =X=
+ | | | | | | |
+*/
+
+struct cell_description
+{
+ v2i start;
+ v2i end;
+
+ int is_special;
+ int is_linear;
+}
+cell_descriptions[] =
+{
+ // 0-3
+ {},
+ { .start = { 1, 0 }, .end = { -1, 0 } },
+ { .start = { 0, 1 }, .end = { 0, -1 } },
+ { .start = { 0, 1 }, .end = { 1, 0 } },
+ // 4-7
+ { .start = { -1, 0 }, .end = { 1, 0 } },
+ { .start = { -1, 0 }, .end = { 1, 0 }, .is_linear = 1 },
+ { .start = { 0, 1 }, .end = { -1, 0 } },
+ { .start = { 0, 1 }, .is_special = 1 },
+ // 8-11
+ { .start = { 0, -1 }, .end = { 0, 1 } },
+ { .start = { 1, 0 }, .end = { 0, -1 } },
+ { .start = { 0, 1 }, .end = { 0, -1 }, .is_linear = 1 },
+ { },
+ // 12-15
+ { .start = { -1, 0 }, .end = { 0, -1 } },
+ { .end = { 0, -1 }, .is_special = 1 },
+ { },
+ { }
+};
+
+enum cell_type
+{
+ k_cell_type_stub = 0,
+ k_cell_type_ramp_right = 3,
+ k_cell_type_ramp_left = 6,
+ k_cell_type_split = 7,
+ k_cell_type_merge = 13,
+ k_cell_type_con_r = 1,
+ k_cell_type_con_u = 2,
+ k_cell_type_con_l = 4,
+ k_cell_type_con_d = 8
+};
+
+v2f const curve_3[] = {{0.5f,1.0f},{0.5f,0.625f},{0.625f,0.5f},{1.0f,0.5f}};
+v2f const curve_6[] = {{0.5f,1.0f},{0.5f,0.625f},{0.375f,0.5f},{0.0f,0.5f}};
+v2f const curve_9[] = {{1.0f,0.5f},{0.625f,0.5f},{0.5f,0.375f},{0.5f,0.0f}};
+v2f const curve_12[]= {{0.0f,0.5f},{0.375f,0.5f},{0.5f,0.375f},{0.5f,0.0f}};
+
+v2f const curve_1[] = {{1.0f,0.5f},{0.8f,0.5f},{0.3f,0.5f},{0.2f,0.5f}};
+v2f const curve_4[] = {{0.0f,0.5f},{0.3f,0.5f},{0.5f,0.5f},{0.8f,0.5f}};
+v2f const curve_2[] = {{0.5f,1.0f},{0.5f,0.8f},{0.5f,0.3f},{0.5f,0.2f}};
+v2f const curve_8[] = {{0.5f,0.0f},{0.5f,0.3f},{0.5f,0.5f},{0.5f,0.8f}};
+
+v2f const curve_7[] = {{0.5f,0.8438f},{0.875f,0.8438f},{0.625f,0.5f},{1.0f,0.5f}};
+v2f const curve_7_1[] = {{0.5f,0.8438f},{1.0f-0.875f,0.8438f},{1.0-0.625f,0.5f},{0.0f,0.5f}};
+
+float const curve_7_linear_section = 0.1562f;