private void DrawWalls(TriGrid grid)
{
float halfSideSize = sideSize / 2;
int halfSideSizeInt = (int)halfSideSize;
float height = TriangleHeight;
float halfHeight = height / 2.0f;
for (int i = 0; i < grid.height; ++i)
{
int centerY = tex.height - ((int)(halfHeight + i * height));
int north = (int)(centerY + halfHeight);
int south = north - (int)height;
// upright
for (int j = (i % 2); j < grid.width; j += 2)
{
int centerX = halfSideSizeInt + j * halfSideSizeInt;
int west = Mathf.Max(0, centerX - halfSideSizeInt);
int east = centerX + halfSideSizeInt;
int currentVertex = grid.PositionToVertex(i, j);
if (!grid.Graph.AreLinked(currentVertex, grid.EastOf(currentVertex)))
{
tex.Line(new Vector2Int(east, south), new Vector2Int(centerX, north), wallColor);
}
if (!grid.Graph.AreLinked(currentVertex, grid.SouthOf(currentVertex)))
{
tex.HorizontalLine(west, east, south, wallColor);
}
}
// !upright
for (int j = ((i + 1) % 2); j < grid.width; j += 2)
{
int centerX = (int)(halfSideSize + j * halfSideSize);
int west = centerX - halfSideSizeInt;
int east = centerX + halfSideSizeInt;
int currentVertex = grid.PositionToVertex(i, j);
if (!grid.Graph.AreLinked(currentVertex, grid.EastOf(currentVertex)))
{
tex.Line(new Vector2Int(east, north), new Vector2Int(centerX, south), wallColor);
}
if (!grid.Graph.AreLinked(currentVertex, grid.NorthOf(currentVertex)))
{
tex.HorizontalLine(west, east, north, wallColor);
}
}
}
}