private static OutlineItem CreateOutlineItem(Mesh mesh)
{
var item = new OutlineItem
{
Text = $"Mesh \"{mesh.Name}\"",
Icon = MultiColorGlyphs.Mesh,
Children = new OutlineItemCollection(),
ToolTip = ToolTipSceneNode,
UserData = mesh,
};
foreach (var submesh in mesh.Submeshes)
item.Children.Add(CreateOutlineItem(submesh));
foreach (var material in mesh.Materials)
item.Children.Add(CreateOutlineItem(material));
if (mesh.Skeleton != null)
item.Children.Add(CreateOutlineItem(mesh.Skeleton));
if (mesh.Animations != null)
foreach (var animation in mesh.Animations)
item.Children.Add(CreateOutlineItem(animation));
if (mesh.Occluder != null)
item.Children.Add(CreateOutlineItem(mesh.Occluder));
return item;
}
private static OutlineItem CreateOutlineItem(Mesh mesh)
{
var item = new OutlineItem
{
Text = $"Mesh \"{mesh.Name}\"",
Icon = MultiColorGlyphs.Mesh,
Children = new OutlineItemCollection(),
ToolTip = ToolTipSceneNode,
UserData = mesh,
};
foreach (var submesh in mesh.Submeshes)
{
item.Children.Add(CreateOutlineItem(submesh));
}
foreach (var material in mesh.Materials)
{
item.Children.Add(CreateOutlineItem(material));
}
if (mesh.Skeleton != null)
{
item.Children.Add(CreateOutlineItem(mesh.Skeleton));
}
if (mesh.Animations != null)
{
foreach (var animation in mesh.Animations)
{
item.Children.Add(CreateOutlineItem(animation));
}
}
if (mesh.Occluder != null)
{
item.Children.Add(CreateOutlineItem(mesh.Occluder));
}
return(item);
}
/// <summary>
/// Initializes a new instance of the <see cref="VegetationObject"/> class.
/// </summary>
/// <param name="services">The service provider.</param>
/// <param name="mesh">The vegetation mesh.</param>
/// <param name="numberOfInstancesPerCell">The number of instances per cell.</param>
/// <param name="cellSize">The size of a cell.</param>
/// <param name="numberOfCellsX">The number of cells in x direction.</param>
/// <param name="numberOfCellsZ">The number of cells in z direction.</param>
/// <param name="randomSeed">A random seed.</param>
public VegetationObject(IServiceLocator services, Mesh mesh, int numberOfInstancesPerCell,
float cellSize, int numberOfCellsX, int numberOfCellsZ, int randomSeed)
{
if (services == null)
throw new ArgumentNullException("services");
if (mesh == null)
throw new ArgumentNullException("mesh");
_services = services;
_mesh = mesh;
_numberOfInstancesPerCell = numberOfInstancesPerCell;
_cellSize = cellSize;
_numberOfCellsX = numberOfCellsX;
_numberOfCellsZ = numberOfCellsZ;
_randomSeed = randomSeed;
_minDistance = 0;
_maxDistance = 50;
}
public static Mesh CreateMesh(IGraphicsService graphicsService, Texture2D texture)
{
if (graphicsService == null)
throw new ArgumentNullException("graphicsService");
if (texture == null)
throw new ArgumentNullException("texture");
List<Vector3> positions = new List<Vector3>();
List<ushort> indices = new List<ushort>();
// Create two rings of vertices around the top and bottom of the cylinder.
for (int i = 0; i < CylinderSegments; i++)
{
float angle = ConstantsF.TwoPi * i / CylinderSegments;
float x = (float)Math.Cos(angle) * CylinderSize;
float z = (float)Math.Sin(angle) * CylinderSize;
positions.Add(new Vector3(x, CylinderSize * 5 / 12, z));
positions.Add(new Vector3(x, -CylinderSize * 5 / 12, z));
}
// Create two center vertices, used for closing the top and bottom.
positions.Add(new Vector3(0, CylinderSize, 0));
positions.Add(new Vector3(0, -CylinderSize, 0));
// Create the individual triangles that make up our skydome.
List<VertexPositionTexture> vertices = new List<VertexPositionTexture>();
ushort index = 0;
for (int i = 0; i < CylinderSegments; i++)
{
int j = (i + 1) % CylinderSegments;
// Calculate texture coordinates for this segment of the cylinder.
float u1 = (float)i / (float)CylinderSegments;
float u2 = (float)(i + 1) / (float)CylinderSegments;
// Two triangles form a quad, one side segment of the cylinder.
vertices.Add(new VertexPositionTexture(positions[i * 2], new Vector2(u1, TexCoordTop)));
indices.Add(index++);
vertices.Add(new VertexPositionTexture(positions[j * 2], new Vector2(u2, TexCoordTop)));
indices.Add(index++);
vertices.Add(new VertexPositionTexture(positions[i * 2 + 1], new Vector2(u1, TexCoordBottom)));
indices.Add(index++);
vertices.Add(new VertexPositionTexture(positions[j * 2], new Vector2(u2, TexCoordTop)));
indices.Add(index++);
vertices.Add(new VertexPositionTexture(positions[j * 2 + 1], new Vector2(u2, TexCoordBottom)));
indices.Add(index++);
vertices.Add(new VertexPositionTexture(positions[i * 2 + 1], new Vector2(u1, TexCoordBottom)));
indices.Add(index++);
// Triangle fanning inward to fill the top above this segment.
vertices.Add(new VertexPositionTexture(positions[CylinderSegments * 2], new Vector2(u1, 0)));
indices.Add(index++);
vertices.Add(new VertexPositionTexture(positions[j * 2], new Vector2(u2, TexCoordTop)));
indices.Add(index++);
vertices.Add(new VertexPositionTexture(positions[i * 2], new Vector2(u1, TexCoordTop)));
indices.Add(index++);
// Triangle fanning inward to fill the bottom below this segment.
vertices.Add(new VertexPositionTexture(positions[CylinderSegments * 2 + 1], new Vector2(u1, 1)));
indices.Add(index++);
vertices.Add(new VertexPositionTexture(positions[i * 2 + 1], new Vector2(u1, TexCoordBottom)));
indices.Add(index++);
vertices.Add(new VertexPositionTexture(positions[j * 2 + 1], new Vector2(u2, TexCoordBottom)));
indices.Add(index++);
}
// Create the vertex buffer.
VertexBuffer vertexBuffer = new VertexBuffer(
graphicsService.GraphicsDevice,
VertexPositionTexture.VertexDeclaration,
vertices.Count, BufferUsage.
None);
vertexBuffer.SetData(vertices.ToArray());
// Create the index buffer.
IndexBuffer indexBuffer = new IndexBuffer(
graphicsService.GraphicsDevice,
IndexElementSize.SixteenBits,
indices.Count,
BufferUsage.None);
indexBuffer.SetData(indices.ToArray());
// Create a submesh, which is a set of primitives which can be rendered in
// one draw call.
Submesh submesh = new Submesh
{
PrimitiveCount = indices.Count / 3,
PrimitiveType = PrimitiveType.TriangleList,
StartIndex = 0,
StartVertex = 0,
VertexCount = vertices.Count,
VertexBuffer = vertexBuffer,
IndexBuffer = indexBuffer,
};
// Create a mesh (which is collection of submeshes and materials).
Mesh mesh = new Mesh
{
Name = "Sky",
BoundingShape = new CylinderShape(CylinderSize, 2 * CylinderSize),
};
mesh.Submeshes.Add(submesh);
// Create a BasicEffectBinding which wraps the XNA BasicEffect.
// An EffectBinding connects an effect with effect parameter values ("effect
// parameter binding"). Some of these parameter values are defined here. Others,
// like World matrices, light parameters, etc. are automatically updated by
// the graphics engine in each frame.
BasicEffectBinding effectBinding = new BasicEffectBinding(graphicsService, null)
{
LightingEnabled = false,
TextureEnabled = true,
VertexColorEnabled = false
};
effectBinding.Set("Texture", texture);
effectBinding.Set("SpecularColor", new Vector3(0, 0, 0));
// Create a material, which is a collection of effect bindings - one effect
// binding for each "render pass". The sky mesh should be rendered in the
// "Sky" render pass. This render pass name is an arbitrary string that is
// used in SampleGraphicsScreen.cs.
Material material = new Material();
material.Add("Sky", effectBinding);
// Assign the material to the submesh.
submesh.SetMaterial(material);
return mesh;
}
private MeshNode CreateMeshNode(IEnumerable<Submesh> submeshes, Color color)
{
var mesh = new Mesh();
mesh.Submeshes.AddRange(submeshes);
var material = new Material();
BasicEffectBinding defaultEffectBinding = new BasicEffectBinding(GraphicsService, null)
{
LightingEnabled = true,
TextureEnabled = false,
VertexColorEnabled = false
};
defaultEffectBinding.Set("DiffuseColor", color.ToVector4());
defaultEffectBinding.Set("SpecularColor", new Vector3(1, 1, 1));
defaultEffectBinding.Set("SpecularPower", 100f);
material.Add("Default", defaultEffectBinding);
var triangleMesh = mesh.ToTriangleMesh();
var shape = new TriangleMeshShape(triangleMesh);
var aabb = shape.GetAabb();
mesh.BoundingShape = new TransformedShape(
new GeometricObject(
new BoxShape(aabb.Extent),
new Pose(aabb.Center)));
mesh.Materials.Add(material);
foreach (var submesh in mesh.Submeshes)
submesh.MaterialIndex = 0;
return new MeshNode(mesh);
}
