/// <summary>
/// Creates a model with VertexBuffer and IndexBuffer.
/// </summary>
/// <param name="customMesh">A mesh defined with VertexBuffer and IndexBuffer</param>
public PrimitiveModel(CustomMesh customMesh)
{
offsetTransform = Matrix.Identity;
offsetToOrigin = false;
vertices = new List <Vector3>();
indices = new List <int>();
this.customMesh = customMesh;
shader = new SimpleEffectShader();
afterEffectShaders = new List <IShader>();
customShapeParameters = "";
#if !WINDOWS_PHONE
shaderName = TypeDescriptor.GetClassName(shader);
#endif
useLighting = true;
shadowAttribute = ShadowAttribute.None;
showBoundingBox = false;
useVertexColor = false;
technique = "";
if (customMesh != null)
{
CalculateMinimumBoundingBox();
triangleCount = customMesh.NumberOfPrimitives;
}
}
/// <summary>
/// Actually builds the text
/// </summary>
/// <returns> The custom mesh that has all of the geometry information</returns>
private void CreateText()
{
customMesh = new CustomMesh();
CreateShape();
foreach (VertexPositionNormalTexture aVertex in basicTextIn3D.Vertices)
{
vertices.Add(aVertex.Position);
}
if (styleToUse == UI3DRenderer.Text3DStyle.Fill)
{
for (int i = 0; i < basicTextIn3D.Vertices.Length; ++i)
{
basicTextIn3D.Vertices[i].Normal = -basicTextIn3D.Vertices[i].Normal;
}
}
foreach (short index in basicTextIn3D.Indices)
{
indices.Add((int)index);
}
customMesh.VertexDeclaration = VertexPositionNormalTexture.VertexDeclaration;
customMesh.VertexBuffer = new VertexBuffer(State.Device, typeof(VertexPositionNormalTexture),
basicTextIn3D.Vertices.Length, BufferUsage.None);
customMesh.VertexBuffer.SetData(basicTextIn3D.Vertices);
customMesh.IndexBuffer = new IndexBuffer(State.Device, typeof(short), basicTextIn3D.Indices.Length,
BufferUsage.None);
customMesh.IndexBuffer.SetData(basicTextIn3D.Indices);
customMesh.NumberOfVertices = basicTextIn3D.Vertices.Length;
customMesh.NumberOfPrimitives = basicTextIn3D.Indices.Length / 3;
customMesh.PrimitiveType = basicTextIn3D.PrimitiveType;
if (vertices.Count == 0)
{
throw new GoblinException("Corrupted model vertices. Failed to calculate MBB.");
}
else
{
boundingBox = BoundingBox.CreateFromPoints(vertices);
boundingSphere = BoundingSphere.CreateFromPoints(vertices);
if (offsetTransform.Equals(Matrix.Identity))
{
offsetTransform.Translation = (boundingBox.Min + boundingBox.Max) / 2;
}
}
triangleCount = indices.Count / 3;
}
private static CustomMesh CreateLayer(Vector2 dimension)
{
CustomMesh mesh = new CustomMesh();
VertexPositionNormalTexture[] vertices = new VertexPositionNormalTexture[4];
Vector2 halfExtent = dimension / 2;
Vector3 v0 = Vector3Helper.Get(-halfExtent.X, 0, -halfExtent.Y);
Vector3 v1 = Vector3Helper.Get(-halfExtent.X, 0, halfExtent.Y);
Vector3 v2 = Vector3Helper.Get(halfExtent.X, 0, halfExtent.Y);
Vector3 v3 = Vector3Helper.Get(halfExtent.X, 0, -halfExtent.Y);
vertices[0].Position = v0;
vertices[1].Position = v1;
vertices[2].Position = v2;
vertices[3].Position = v3;
for (int i = 0; i < vertices.Length; i++)
vertices[i].Normal = Vector3.UnitY;
vertices[1].TextureCoordinate = new Vector2(0, 1);
vertices[0].TextureCoordinate = new Vector2(0, 0);
vertices[2].TextureCoordinate = new Vector2(1, 1);
vertices[3].TextureCoordinate = new Vector2(1, 0);
mesh.VertexDeclaration = new VertexDeclaration(State.Device,
VertexPositionNormalTexture.VertexElements);
mesh.VertexBuffer = new VertexBuffer(State.Device,
VertexPositionNormalTexture.SizeInBytes * vertices.Length, BufferUsage.None);
mesh.VertexBuffer.SetData(vertices);
short[] indices = new short[6];
indices[0] = 0; indices[1] = 2; indices[2] = 1;
indices[3] = 2; indices[4] = 0; indices[5] = 3;
mesh.IndexBuffer = new IndexBuffer(State.Device, typeof(short), 6,
BufferUsage.None);
mesh.IndexBuffer.SetData(indices);
mesh.SizeInBytes = VertexPositionNormalTexture.SizeInBytes;
mesh.NumberOfVertices = 4;
mesh.NumberOfPrimitives = 2;
return mesh;
}
/// <summary>
/// Copies only the geometry (Mesh, customMesh, AnimatedMesh,
/// MinimumBoundingBox, MinimumBoundingSphere, TriangleCount and Transforms)
/// </summary>
/// <param name="model">A source model from which to copy</param>
public virtual void CopyGeometry(IModel model)
{
if (!(model is PrimitiveModel))
{
return;
}
PrimitiveModel srcModel = (PrimitiveModel)model;
vertices.AddRange(((IPhysicsMeshProvider)model).Vertices);
indices.AddRange(((IPhysicsMeshProvider)model).Indices);
customMesh = srcModel.customMesh;
triangleCount = srcModel.TriangleCount;
boundingBox = srcModel.MinimumBoundingBox;
boundingSphere = srcModel.MinimumBoundingSphere;
}
private static CustomMesh CreateShape(float xDim, float yDim, float zDim)
{
// Create a primitive mesh for creating our custom pyramid shape
CustomMesh pyramid = new CustomMesh();
// Even though we really need 5 vertices to create a pyramid shape, since
// we want to assign different normals for points with same position to have
// more accurate lighting effect, we will use 16 vertices.
VertexPositionNormal[] verts = new VertexPositionNormal[16];
Vector3 vBase0 = new Vector3(-xDim / 2, 0, zDim / 2);
Vector3 vBase1 = new Vector3(xDim / 2, 0, zDim / 2);
Vector3 vBase2 = new Vector3(xDim / 2, 0, -zDim / 2);
Vector3 vBase3 = new Vector3(-xDim / 2, 0, -zDim / 2);
Vector3 vTop = new Vector3(0, yDim, 0);
verts[0].Position = vTop;
verts[1].Position = vBase1;
verts[2].Position = vBase0;
verts[3].Position = vTop;
verts[4].Position = vBase2;
verts[5].Position = vBase1;
verts[6].Position = vTop;
verts[7].Position = vBase3;
verts[8].Position = vBase2;
verts[9].Position = vTop;
verts[10].Position = vBase0;
verts[11].Position = vBase3;
verts[12].Position = vBase0;
verts[13].Position = vBase1;
verts[14].Position = vBase2;
verts[15].Position = vBase3;
verts[0].Normal = verts[1].Normal = verts[2].Normal = CalcNormal(vTop, vBase1, vBase0);
verts[3].Normal = verts[4].Normal = verts[5].Normal = CalcNormal(vTop, vBase2, vBase1);
verts[6].Normal = verts[7].Normal = verts[8].Normal = CalcNormal(vTop, vBase3, vBase2);
verts[9].Normal = verts[10].Normal = verts[11].Normal = CalcNormal(vTop, vBase0, vBase3);
verts[12].Normal = verts[13].Normal = verts[14].Normal = verts[15].Normal = CalcNormal(vBase0,
vBase1, vBase3);
pyramid.VertexBuffer = new VertexBuffer(State.Device,
typeof(VertexPositionNormal), 16, BufferUsage.None);
pyramid.VertexDeclaration = VertexPositionNormal.VertexDeclaration;
pyramid.VertexBuffer.SetData(verts);
pyramid.NumberOfVertices = 16;
short[] indices = new short[18];
indices[0] = 0;
indices[1] = 1;
indices[2] = 2;
indices[3] = 3;
indices[4] = 4;
indices[5] = 5;
indices[6] = 6;
indices[7] = 7;
indices[8] = 8;
indices[9] = 9;
indices[10] = 10;
indices[11] = 11;
indices[12] = 12;
indices[13] = 13;
indices[14] = 15;
indices[15] = 13;
indices[16] = 14;
indices[17] = 15;
pyramid.IndexBuffer = new IndexBuffer(State.Device, typeof(short), 18,
BufferUsage.WriteOnly);
pyramid.IndexBuffer.SetData(indices);
pyramid.PrimitiveType = PrimitiveType.TriangleList;
pyramid.NumberOfPrimitives = 6;
return pyramid;
}
private void CreateObject()
{
// Create a primitive mesh for creating our custom pyramid shape
CustomMesh pyramid = new CustomMesh();
// Even though we really need 5 vertices to create a pyramid shape, since
// we want to assign different normals for points with same position to have
// more accurate lighting effect, we will use 16 vertices.
// Also, we want to have position, normal, and texture information in our
// vertices, we'll use VertexPositionNormalTexture format. There are other
// types of Vertex format as well depending on your needs.
VertexPositionNormalTexture[] verts = new VertexPositionNormalTexture[16];
// Create a pyramid with 8x8 base and height of 6
Vector3 vBase0 = new Vector3(-4, 0, 4);
Vector3 vBase1 = new Vector3(4, 0, 4);
Vector3 vBase2 = new Vector3(4, 0, -4);
Vector3 vBase3 = new Vector3(-4, 0, -4);
Vector3 vTop = new Vector3(0, 6, 0);
verts[0].Position = vTop;
verts[1].Position = vBase1;
verts[2].Position = vBase0;
verts[3].Position = vTop;
verts[4].Position = vBase2;
verts[5].Position = vBase1;
verts[6].Position = vTop;
verts[7].Position = vBase3;
verts[8].Position = vBase2;
verts[9].Position = vTop;
verts[10].Position = vBase0;
verts[11].Position = vBase3;
verts[12].Position = vBase0;
verts[13].Position = vBase1;
verts[14].Position = vBase2;
verts[15].Position = vBase3;
verts[0].Normal = verts[1].Normal = verts[2].Normal = CalcNormal(vTop, vBase1, vBase0);
verts[3].Normal = verts[4].Normal = verts[5].Normal = CalcNormal(vTop, vBase2, vBase1);
verts[6].Normal = verts[7].Normal = verts[8].Normal = CalcNormal(vTop, vBase3, vBase2);
verts[9].Normal = verts[10].Normal = verts[11].Normal = CalcNormal(vTop, vBase0, vBase3);
verts[12].Normal = verts[13].Normal = verts[14].Normal = verts[15].Normal = CalcNormal(vBase0,
vBase1, vBase3);
Vector2 texCoordTop = new Vector2(0.5f, 0);
Vector2 texCoordLeftBase = new Vector2(0, 1);
Vector2 texCoordRightBase = new Vector2(1, 1);
verts[0].TextureCoordinate = texCoordTop;
verts[1].TextureCoordinate = texCoordLeftBase;
verts[2].TextureCoordinate = texCoordRightBase;
verts[3].TextureCoordinate = texCoordTop;
verts[4].TextureCoordinate = texCoordLeftBase;
verts[5].TextureCoordinate = texCoordRightBase;
verts[6].TextureCoordinate = texCoordTop;
verts[7].TextureCoordinate = texCoordLeftBase;
verts[8].TextureCoordinate = texCoordRightBase;
verts[9].TextureCoordinate = texCoordTop;
verts[10].TextureCoordinate = texCoordLeftBase;
verts[11].TextureCoordinate = texCoordRightBase;
verts[12].TextureCoordinate = new Vector2(1, 1);
verts[13].TextureCoordinate = new Vector2(1, 0);
verts[14].TextureCoordinate = new Vector2(0, 0);
verts[15].TextureCoordinate = new Vector2(0, 1);
pyramid.VertexBuffer = new VertexBuffer(graphics.GraphicsDevice,
typeof(VertexPositionNormalTexture), 16, BufferUsage.None);
pyramid.VertexDeclaration = VertexPositionNormalTexture.VertexDeclaration;
pyramid.VertexBuffer.SetData(verts);
pyramid.NumberOfVertices = 16;
short[] indices = new short[18];
indices[0] = 0;
indices[1] = 1;
indices[2] = 2;
indices[3] = 3;
indices[4] = 4;
indices[5] = 5;
indices[6] = 6;
indices[7] = 7;
indices[8] = 8;
indices[9] = 9;
indices[10] = 10;
indices[11] = 11;
indices[12] = 12;
indices[13] = 13;
indices[14] = 15;
indices[15] = 13;
indices[16] = 14;
indices[17] = 15;
pyramid.IndexBuffer = new IndexBuffer(graphics.GraphicsDevice, typeof(short), 18,
BufferUsage.WriteOnly);
pyramid.IndexBuffer.SetData(indices);
pyramid.PrimitiveType = PrimitiveType.TriangleList;
pyramid.NumberOfPrimitives = 6;
PrimitiveModel pyramidModel = new PrimitiveModel(pyramid);
GeometryNode pyramidNode = new GeometryNode();
pyramidNode.Model = pyramidModel;
Material pyramidMaterial = new Material();
pyramidMaterial.Diffuse = Color.White.ToVector4();
pyramidMaterial.Specular = Color.White.ToVector4();
pyramidMaterial.SpecularPower = 10;
pyramidMaterial.Texture = Content.Load<Texture2D>("brick_wall_14");
pyramidNode.Material = pyramidMaterial;
scene.RootNode.AddChild(pyramidNode);
}
/// <summary>
/// Creates a model with VertexBuffer and IndexBuffer.
/// </summary>
/// <param name="customMesh">A mesh defined with VertexBuffer and IndexBuffer</param>
public PrimitiveModel(CustomMesh customMesh)
{
offsetTransform = Matrix.Identity;
offsetToOrigin = false;
vertices = new List<Vector3>();
indices = new List<int>();
this.customMesh = customMesh;
shader = new SimpleEffectShader();
afterEffectShaders = new List<IShader>();
customShapeParameters = "";
#if !WINDOWS_PHONE
shaderName = TypeDescriptor.GetClassName(shader);
#endif
useLighting = true;
shadowAttribute = ShadowAttribute.None;
showBoundingBox = false;
useVertexColor = false;
technique = "";
if (customMesh != null)
{
CalculateMinimumBoundingBox();
triangleCount = customMesh.NumberOfPrimitives;
}
}
/// <summary>
/// Copies only the geometry (Mesh, customMesh, AnimatedMesh,
/// MinimumBoundingBox, MinimumBoundingSphere, TriangleCount and Transforms)
/// </summary>
/// <param name="model">A source model from which to copy</param>
public virtual void CopyGeometry(IModel model)
{
if (!(model is PrimitiveModel))
return;
PrimitiveModel srcModel = (PrimitiveModel)model;
vertices.AddRange(((IPhysicsMeshProvider)model).Vertices);
indices.AddRange(((IPhysicsMeshProvider)model).Indices);
customMesh = srcModel.customMesh;
triangleCount = srcModel.TriangleCount;
boundingBox = srcModel.MinimumBoundingBox;
boundingSphere = srcModel.MinimumBoundingSphere;
}
/// <summary>
/// Actually builds the text
/// </summary>
/// <returns> The custom mesh that has all of the geometry information</returns>
private void CreateText()
{
customMesh = new CustomMesh();
CreateShape();
foreach (VertexPositionNormalTexture aVertex in basicTextIn3D.Vertices)
{
vertices.Add(aVertex.Position);
}
if(styleToUse == UI3DRenderer.Text3DStyle.Fill)
for (int i = 0; i < basicTextIn3D.Vertices.Length; ++i)
basicTextIn3D.Vertices[i].Normal = -basicTextIn3D.Vertices[i].Normal;
foreach (short index in basicTextIn3D.Indices)
{
indices.Add((int)index);
}
customMesh.VertexDeclaration = VertexPositionNormalTexture.VertexDeclaration;
customMesh.VertexBuffer = new VertexBuffer(State.Device, typeof(VertexPositionNormalTexture),
basicTextIn3D.Vertices.Length, BufferUsage.None);
customMesh.VertexBuffer.SetData(basicTextIn3D.Vertices);
customMesh.IndexBuffer = new IndexBuffer(State.Device, typeof(short), basicTextIn3D.Indices.Length,
BufferUsage.None);
customMesh.IndexBuffer.SetData(basicTextIn3D.Indices);
customMesh.NumberOfVertices = basicTextIn3D.Vertices.Length;
customMesh.NumberOfPrimitives = basicTextIn3D.Indices.Length / 3;
customMesh.PrimitiveType = basicTextIn3D.PrimitiveType;
if (vertices.Count == 0)
{
throw new GoblinException("Corrupted model vertices. Failed to calculate MBB.");
}
else
{
boundingBox = BoundingBox.CreateFromPoints(vertices);
boundingSphere = BoundingSphere.CreateFromPoints(vertices);
if(offsetTransform.Equals(Matrix.Identity))
offsetTransform.Translation = (boundingBox.Min + boundingBox.Max) / 2;
}
triangleCount = indices.Count / 3;
}
private static CustomMesh CreateBox(Vector3 dimension, Vector2 textCoord)
{
CustomMesh mesh = new CustomMesh();
// Even though we only need 8 vertices to create a cube/box geometry, because
// XNA uses vertex normals instead of face normals, we need 3 duplicate vertices
// on each of the 8 corners of the cube/box geometry, so that each of them
// can have different normals depending on the face the vertex belongs to.
// Also, because we want to texture map as well as illuminate the model with
// lights, we use a vertex structure that contains position, normal, and texture
// coornidate information.
VertexPositionNormalTexture[] vertices = new VertexPositionNormalTexture[24];
Vector3 halfExtent = dimension / 2;
// Create 8 vertex positions that will be assigned to those 24 vertices
Vector3 v0 = new Vector3(-halfExtent.X, -halfExtent.Y, -halfExtent.Z);
Vector3 v1 = new Vector3(halfExtent.X, -halfExtent.Y, -halfExtent.Z);
Vector3 v2 = new Vector3(-halfExtent.X, halfExtent.Y, -halfExtent.Z);
Vector3 v3 = new Vector3(halfExtent.X, halfExtent.Y, -halfExtent.Z);
Vector3 v4 = new Vector3(halfExtent.X, halfExtent.Y, halfExtent.Z);
Vector3 v5 = new Vector3(-halfExtent.X, halfExtent.Y, halfExtent.Z);
Vector3 v6 = new Vector3(halfExtent.X, -halfExtent.Y, halfExtent.Z);
Vector3 v7 = new Vector3(-halfExtent.X, -halfExtent.Y, halfExtent.Z);
// Since there are 6 different face directions for a cube/box geometry,
// we create 6 normal vectors to assign to the faces
Vector3 nZ = new Vector3(0, 0, -1);
Vector3 pZ = new Vector3(0, 0, 1);
Vector3 nX = new Vector3(-1, 0, 0);
Vector3 pX = new Vector3(1, 0, 0);
Vector3 nY = new Vector3(0, -1, 0);
Vector3 pY = new Vector3(0, 1, 0);
Vector2 t0 = new Vector2(0, 0);
Vector2 t1 = new Vector2(textCoord.X, 0);
Vector2 t2 = new Vector2(0, textCoord.Y);
Vector2 t3 = new Vector2(textCoord.X, textCoord.Y);
// Assign the 8 positions to the 24 vertices
vertices[0].Position = v0; vertices[1].Position = v1;
vertices[2].Position = v2; vertices[3].Position = v3;
vertices[4].Position = v0; vertices[5].Position = v7;
vertices[6].Position = v2; vertices[7].Position = v5;
vertices[8].Position = v4; vertices[9].Position = v5;
vertices[10].Position = v7; vertices[11].Position = v6;
vertices[12].Position = v4; vertices[13].Position = v3;
vertices[14].Position = v1; vertices[15].Position = v6;
vertices[16].Position = v2; vertices[17].Position = v4;
vertices[18].Position = v5; vertices[19].Position = v3;
vertices[20].Position = v0; vertices[21].Position = v1;
vertices[22].Position = v6; vertices[23].Position = v7;
// Assign the texture coordinates to only those faces we care about texture mapping
vertices[4].TextureCoordinate = t3; vertices[5].TextureCoordinate = t1;
vertices[6].TextureCoordinate = t2; vertices[7].TextureCoordinate = t0;
vertices[12].TextureCoordinate = t1; vertices[13].TextureCoordinate = t3;
vertices[14].TextureCoordinate = t2; vertices[15].TextureCoordinate = t0;
// Assign the appropriate normal vectors to each of the triangle faces
for (int i = 0; i < 4; i++)
vertices[i].Normal = nZ;
for (int i = 4; i < 8; i++)
vertices[i].Normal = nX;
for (int i = 8; i < 12; i++)
vertices[i].Normal = pZ;
for (int i = 12; i < 16; i++)
vertices[i].Normal = pX;
for (int i = 16; i < 20; i++)
vertices[i].Normal = pY;
for (int i = 20; i < 24; i++)
vertices[i].Normal = nY;
mesh.VertexDeclaration = VertexPositionNormalTexture.VertexDeclaration;
mesh.VertexBuffer = new VertexBuffer(State.Device,
typeof(VertexPositionNormalTexture), 24, BufferUsage.None);
mesh.VertexBuffer.SetData(vertices);
// Since there are 12 triangle faces (6 rectangle faces, and each rectangle face contains
// 2 triangle faces), we need 36 indices (12 triangles * 3 vertices/triangle)
short[] indices = new short[36];
indices[0] = 0; indices[1] = 1; indices[2] = 2;
indices[3] = 2; indices[4] = 1; indices[5] = 3;
indices[6] = 4; indices[7] = 6; indices[8] = 5;
indices[9] = 6; indices[10] = 7; indices[11] = 5;
indices[12] = 11; indices[13] = 10; indices[14] = 9;
indices[15] = 11; indices[16] = 9; indices[17] = 8;
indices[18] = 14; indices[19] = 15; indices[20] = 13;
indices[21] = 15; indices[22] = 12; indices[23] = 13;
indices[24] = 19; indices[25] = 17; indices[26] = 18;
indices[27] = 19; indices[28] = 18; indices[29] = 16;
indices[30] = 21; indices[31] = 20; indices[32] = 23;
indices[33] = 21; indices[34] = 23; indices[35] = 22;
mesh.IndexBuffer = new IndexBuffer(State.Device, typeof(short), 36,
BufferUsage.None);
mesh.IndexBuffer.SetData(indices);
mesh.NumberOfVertices = 24;
mesh.NumberOfPrimitives = 12;
return mesh;
}
