Function Structure_IsValidBuildLocation

src/structure.c:734–815

* Checks if the given position is a valid location for the given structure type. * * @param position The (packed) tile to check. * @param type The structure type to check the position for. * @return 0 if the position is not valid, 1 if the position is valid and have enough slabs, <0 if the position is valid but miss some slabs. */

 * @return 0 if the position is not valid, 1 if the position is valid and have enough slabs, <0 if the position is valid but miss some slabs.
 */
int16 Structure_IsValidBuildLocation(uint16 position, StructureType type)
{
	const StructureInfo *si;
	const uint16 *layoutTile;
	uint8 i;
	uint16 neededSlabs;
	bool isValid;
	uint16 curPos;

	si = &g_table_structureInfo[type];
	layoutTile = g_table_structure_layoutTiles[si->layout];

	isValid = true;
	neededSlabs = 0;
	for (i = 0; i < g_table_structure_layoutTileCount[si->layout]; i++) {
		uint16 lst;

		curPos = position + layoutTile[i];

		lst = Map_GetLandscapeType(curPos);

		if (g_debugScenario) {
			if (!g_table_landscapeInfo[lst].isValidForStructure2) {
				isValid = false;
				break;
			}
		} else {
			if (!Map_IsValidPosition(curPos)) {
				isValid = false;
				break;
			}

			if (si->o.flags.notOnConcrete) {
				if (!g_table_landscapeInfo[lst].isValidForStructure2 && g_validateStrictIfZero == 0) {
					isValid = false;
					break;
				}
			} else {
				if (!g_table_landscapeInfo[lst].isValidForStructure && g_validateStrictIfZero == 0) {
					isValid = false;
					break;
				}
				if (lst != LST_CONCRETE_SLAB) neededSlabs++;
			}
		}

		if (Object_GetByPackedTile(curPos) != NULL) {
			isValid = false;
			break;
		}
	}

	if (g_validateStrictIfZero == 0 && isValid && type != STRUCTURE_CONSTRUCTION_YARD && !g_debugScenario) {
		isValid = false;
		for (i = 0; i < 16; i++) {
			uint16 offset, lst;
			Structure *s;