public void Generate(Map map)
{
int w = map.Width;
int h = map.Height;
int faces = 0; // face count needed
int vCount = 0; // total vertices
int index = 0;
int[, ,] indexMap = new int[w + 1, h + 1, 2];
for (int x = 0; x < w + 1; ++x)
{
for (int y = 0; y < h + 1; ++y)
{
if (map.IsSquareOnLevel(x, y, 1))
{
++vCount;
if (map.IsSquareOnLevel(x, y, 0))
{
++vCount;
}
}
}
}
vertices = new Vector3[vCount];
index = 0;
for (int x = 0; x < w + 1; ++x)
{
for (int y = 0; y < h + 1; ++y)
{
if (map.IsSquareOnLevel(x, y, 1))
{
vertices[index] = new Vector3(x, 1, y);
indexMap[x, y, 1] = index;
++index;
if (map.IsSquareOnLevel(x, y, 0))
{
vertices[index] = new Vector3(x, 0, y);
indexMap[x, y, 0] = index;
++index;
}
}
}
}
for (int x = 0; x < w; ++x)
{
for (int y = 0; y < h; ++y)
{
int t = map.GetHeight(x, y);
if (t > 0)
{
if (map.GetHeight(x + 1, y) < 1)
{
++faces;
}
if (map.GetHeight(x - 1, y) < 1)
{
++faces;
}
if (map.GetHeight(x, y + 1) < 1)
{
++faces;
}
if (map.GetHeight(x, y - 1) < 1)
{
++faces;
}
++faces;
}
}
}
triangles = new int[faces * 3 * 2];
index = 0;
for (int x = 0; x < w; ++x)
{
for (int y = 0; y < h; ++y)
{
if (map.IsLevel(x, y, 1))
{
// top
triangles[index++] = indexMap[x, y, 1];
triangles[index++] = indexMap[x, y + 1, 1];
triangles[index++] = indexMap[x + 1, y + 1, 1];
triangles[index++] = indexMap[x, y, 1];
triangles[index++] = indexMap[x + 1, y + 1, 1];
triangles[index++] = indexMap[x + 1, y, 1];
if (map.GetHeight(x + 1, y) < 1)
{
// East
triangles[index++] = indexMap[x + 1, y + 1, 1];
triangles[index++] = indexMap[x + 1, y, 0];
triangles[index++] = indexMap[x + 1, y, 1];
triangles[index++] = indexMap[x + 1, y, 0];
triangles[index++] = indexMap[x + 1, y + 1, 1];
triangles[index++] = indexMap[x + 1, y + 1, 0];
}
if (map.GetHeight(x - 1, y) < 1)
{
// West
triangles[index++] = indexMap[x, y, 1];
triangles[index++] = indexMap[x, y + 1, 0];
triangles[index++] = indexMap[x, y + 1, 1];
triangles[index++] = indexMap[x, y, 0];
triangles[index++] = indexMap[x, y + 1, 0];
triangles[index++] = indexMap[x, y, 1];
}
if (map.GetHeight(x, y + 1) < 1)
{
// North
triangles[index++] = indexMap[x + 1, y + 1, 1];
triangles[index++] = indexMap[x, y + 1, 1];
triangles[index++] = indexMap[x + 1, y + 1, 0];
triangles[index++] = indexMap[x + 1, y + 1, 0];
triangles[index++] = indexMap[x, y + 1, 1];
triangles[index++] = indexMap[x, y + 1, 0];
}
if (map.GetHeight(x, y - 1) < 1)
{
// South
triangles[index++] = indexMap[x + 1, y, 1];
triangles[index++] = indexMap[x, y, 0];
triangles[index++] = indexMap[x, y, 1];
triangles[index++] = indexMap[x + 1, y, 0];
triangles[index++] = indexMap[x, y, 0];
triangles[index++] = indexMap[x + 1, y, 1];
}
}
}
}
}
