private static void AddBar(FlatMeshBuilder meshBuilder, BarInput input)
{
var barRotationY = Quaternion.AngleAxis(input.angleY, Vector3.up);
var v0 = -input.spike + input.offset;
var v5 = input.height + input.spike + input.offset;
var vertices = Squares.Vertices();
for (int i1 = 0, i0 = vertices.Length - 1; i1 < vertices.Length; i0 = i1++)
{
var vertex0 = vertices[i0].X_Y();
var vertex1 = vertices[i1].X_Y();
var v1 = barRotationY * vertex0 * input.radius + input.offset;
var v2 = barRotationY * vertex1 * input.radius + input.offset;
var v3 = v1 + input.height;
var v4 = v2 + input.height;
meshBuilder.AddTriangle(v0, v2, v1);
meshBuilder.AddTriangle(v1, v2, v4);
meshBuilder.AddTriangle(v1, v4, v3);
meshBuilder.AddTriangle(v3, v4, v5);
}
}
private MeshBuilder Generate(bool[,] map)
{
var builder = new FlatMeshBuilder()
{
Options = EMeshBuildingOptions.NONE
};
var width = map.GetWidth();
var height = map.GetHeight();
var wallOffset = new Vector3(0.0f, 0.0f, wallHeight);
var vertices = MarchingSquares.Vertices();
for (int y = 0; y < height - 1; y++)
{
for (int x = 0; x < width - 1; x++)
{
var active0 = !map[x, y];
var active1 = !map[x, y + 1];
var active2 = !map[x + 1, y + 1];
var active3 = !map[x + 1, y];
var configuration = MarchingSquares.GetConfiguration(active0, active1, active2, active3);
var triangles = MarchingSquares.Triangles[configuration];
var offset = new Vector3(x, y) - wallOffset;
int i = 0;
for (; i < triangles.Length && triangles[i] != -1; i += 3)
{
var t0 = triangles[i + 0];
var t1 = triangles[i + 1];
var t2 = triangles[i + 2];
var v0 = (Vector3)vertices[t0] + offset;
var v1 = (Vector3)vertices[t1] + offset;
var v2 = (Vector3)vertices[t2] + offset;
builder.AddTriangle(v0, v1, v2);
}
if (configuration > 0 && configuration < MarchingSquares.Triangles.Length - 1)
{
var wt0 = triangles[i - 1];
var wt1 = triangles[i - 2];
var wv0 = (Vector3)vertices[wt0] + offset;
var wv1 = (Vector3)vertices[wt1] + offset;
var wv2 = wv1 + wallOffset;
var wv3 = wv0 + wallOffset;
builder.AddTriangle(wv0, wv1, wv2);
builder.AddTriangle(wv0, wv2, wv3);
}
}
}
return(builder);
}
private static void AddBoards(FlatMeshBuilder meshBuilder, BoardsInput input)
{
var vertices = Squares.Vertices();
var boardVertices = new Vector3[vertices.Length];
for (int i = 0; i < boardVertices.Length; ++i)
{
boardVertices[i] = Mathx.Multiply(vertices[i].X_Y(), input.extents) + input.offset;
}
var boardHeight = input.height / input.count;
for (int i = 0; i < input.count; ++i)
{
var boardTop = input.top - boardHeight * i;
var v0 = boardVertices[0] + boardTop;
var v1 = boardVertices[1] + boardTop;
var v2 = boardVertices[2] + boardTop;
var v3 = boardVertices[3] + boardTop;
var v4 = (v0 + v1) * 0.5f - boardHeight;
var v5 = (v2 + v3) * 0.5f - boardHeight;
meshBuilder.AddTriangle(v0, v1, v2);
meshBuilder.AddTriangle(v0, v2, v3);
meshBuilder.AddTriangle(v1, v4, v5);
meshBuilder.AddTriangle(v1, v5, v2);
meshBuilder.AddTriangle(v4, v0, v3);
meshBuilder.AddTriangle(v4, v3, v5);
}
}
