Island mesh

gistfile1.cpp

	for(uint z = 0; z < mapSize; ++z)
	{
		for(uint x = 0; x < mapSize; ++x)
		{
			int index = z * mapSize + x;

			if(mapData[index] == 0)
				continue;

			positionsMap[index] = Vector3(x, mapData[index] * 0.05, z);
			indexesMap[index] = indexesCount;
			indexesCount += 1;
			manualObject->position(positionsMap[index]);

			if(z == 0 || x == 0)
				continue;

			//Has quad?
			// 3     2
 			//  * - *
			//  | \ |
			//  * - *
			// 1     0

			bool hasPoint1 = mapData[index - 1] != 0;
			bool hasPoint2 = mapData[(z - 1) * mapSize + x] != 0;
			bool hasPoint3 = mapData[(z - 1) * mapSize + x - 1] != 0;

			if(hasPoint1 && hasPoint2 && hasPoint3)
			{
				uint32 index0 = indexesCount - 1;
				uint32 index1 = indexesMap[index - 1];
				uint32 index2 = indexesMap[(z - 1) * mapSize + x];
				uint32 index3 = indexesMap[(z - 1) * mapSize + x - 1];

				manualObject->quad(index0, index2, index3, index1);
			}
			// 3
			//  * 
			//  | \
			//  * - * 
			// 1     0
			else if(hasPoint1 && !hasPoint2 && hasPoint3)
			{
				uint32 index0 = indexesCount - 1;
				uint32 index1 = indexesMap[index - 1];
				uint32 index3 = indexesMap[(z - 1) * mapSize + x - 1];

				manualObject->triangle(index0, index3, index1);
			}
			//      2
			//      * 
			//    / |
			//  * - *
			// 1     0
			else if(hasPoint1 && hasPoint2 && !hasPoint3)
			{
				uint32 index0 = indexesCount - 1;
				uint32 index1 = indexesMap[index - 1];
				uint32 index2 = indexesMap[(z - 1) * mapSize + x];

				manualObject->triangle(index0, index2, index1);
			}
			// 3    2
			// * -  * 
			//    \ |
			//      *
			//      0
			else if(!hasPoint1 && hasPoint2 && hasPoint3)
			{
				uint32 index0 = indexesCount - 1;
				uint32 index2 = indexesMap[(z - 1) * mapSize + x];
				uint32 index3 = indexesMap[(z - 1) * mapSize + x - 1];

				manualObject->triangle(index0, index2, index3);
			}
		}
	}

	manualObject->end();