/// <summary>
/// Radio del BoundingBox
/// </summary>
public float calculateBoxRadius()
{
float rsq = calculateBoxRadiusSquare();
return(FastMath.Sqrt(rsq));
}
/// <summary>
/// Construye el mesh del BoundingSphere
/// </summary>
private void updateValues()
{
if (vertices == null)
{
int verticesCount = (SPHERE_MESH_RESOLUTION * 2 + 2) * 3;
this.vertices = new CustomVertex.PositionColored[verticesCount];
}
int index = 0;
float step = FastMath.TWO_PI / (float)SPHERE_MESH_RESOLUTION;
// Plano XY
for (float a = 0f; a <= FastMath.TWO_PI; a += step)
{
vertices[index++] = new CustomVertex.PositionColored(new Vector3(FastMath.Cos(a) * radius, FastMath.Sin(a) * radius, 0f) + center, renderColor);
vertices[index++] = new CustomVertex.PositionColored(new Vector3(FastMath.Cos(a + step) * radius, FastMath.Sin(a + step) * radius, 0f) + center, renderColor);
}
// Plano XZ
for (float a = 0f; a <= FastMath.TWO_PI; a += step)
{
vertices[index++] = new CustomVertex.PositionColored(new Vector3(FastMath.Cos(a) * radius, 0f, FastMath.Sin(a) * radius) + center, renderColor);
vertices[index++] = new CustomVertex.PositionColored(new Vector3(FastMath.Cos(a + step) * radius, 0f, FastMath.Sin(a + step) * radius) + center, renderColor);
}
// Plano YZ
for (float a = 0f; a <= FastMath.TWO_PI; a += step)
{
vertices[index++] = new CustomVertex.PositionColored(new Vector3(0f, FastMath.Cos(a) * radius, FastMath.Sin(a) * radius) + center, renderColor);
vertices[index++] = new CustomVertex.PositionColored(new Vector3(0f, FastMath.Cos(a + step) * radius, FastMath.Sin(a + step) * radius) + center, renderColor);
}
}
/// <summary>
/// Devuelve el menor valor de los 3 componentes del vector
/// </summary>
/// <param name="v">Vector</param>
/// <returns>Menor valor de los tres</returns>
public static float min(Vector3 v)
{
return(FastMath.Min(FastMath.Min(v.X, v.Y), v.Z));
}
/// <summary>
/// Aplica el valor absoluto a todos los componentes del vector
/// </summary>
/// <param name="v">Vector</param>
/// <returns>Vector resultante</returns>
public static Vector3 abs(Vector3 v)
{
return(new Vector3(FastMath.Abs(v.X), FastMath.Abs(v.Y), FastMath.Abs(v.Z)));
}
/// <summary>
/// Duplica los vertices que deben tener coordenadas de textura diferentes para diferentes triangulos
/// </summary>
/// <param name="vertices"></param>
/// <param name="indices"></param>
/// <param name="iverticesU1"></param>
/// <param name="polos"></param>
protected virtual void fixTexcoords(List <Vertex.PositionColoredTexturedNormal> vertices, List <int> indices, List <int> iverticesU1, int[] polos)
{
Dictionary <int, int> duplicados = new Dictionary <int, int>();
float U0p5 = 0.5f * UVTiling.X + UVOffset.X;
float U1 = UVTiling.X + UVOffset.X;
//Fix compartidos
foreach (int idx in iverticesU1)
{
for (int i = 0; i < indices.Count; i += 3)
{
//Triangulo que tiene ese vertice.
if (indices[i] == idx || indices[i + 1] == idx || indices[i + 2] == idx)
{
int i1 = indices[i];
int i2 = indices[i + 1];
int i3 = indices[i + 2];
//Solo me importan los que tienen un vertice con u=1(fin de la textura) y otro menor a 0.5 (comienzo de la textura)
if ((!esPolo(vertices[i1]) && vertices[i1].Tu < U0p5) || (!esPolo(vertices[i2]) && vertices[i2].Tu < U0p5) || (!esPolo(vertices[i3]) && vertices[i3].Tu < U0p5))
{
List <int> u1 = new List <int>();
List <int> um = new List <int>();
//Clasifico cada vertice segun su Tu1
for (int j = 0; j < 3; j++)
{
if (vertices[indices[i + j]].Tu == U1 || esPolo(vertices[indices[i + j]]))
{
u1.Add(i + j);
}
else if (vertices[indices[i + j]].Tu < U0p5)
{
um.Add(i + j);
}
}
if (um.Count == 1 && !(esPolo(vertices[indices[u1[0]]]) && vertices[indices[um[0]]].X >= 0))
{
//Casos:
//2 vertices con u=1 o uno con u=1 y otro con u>0.5
//1 vertice es el polo, y uno de los vertices esta al final de la textura y otro al principio
//La coordenada textura del de u >0.5 pasa a ser 1+u
indices[um[0]] = dupWithU(vertices, indices, duplicados, um[0], vertices[indices[um[0]]].Tu + UVTiling.X);
}
else if (!esPolo(vertices[indices[u1[0]]]))
{
// Caso:
// 1 vertice con u=1 y dos con u<0.5
// El u del vertice con u=1 pasa a ser 0
indices[u1[0]] = dupWithU(vertices, indices, duplicados, u1[0], UVOffset.X);
}
}
}
}
}
//Fix polos
for (int p = 0; p < 2; p++)
{
bool first = true;
for (int i = 0; i < indices.Count; i += 3)//Por cada triangulo
{
int iipolo = i;
for (; iipolo < i + 3 && indices[iipolo] != polos[p]; iipolo++)
{
;
}
//Si un vertice es el polo
if (iipolo < i + 3)
{
Vertex.PositionColoredTexturedNormal[] u = new Vertex.PositionColoredTexturedNormal[2];
int n = 0;
//Guardo los vertices que no son polos.
for (int j = 0; j < 3; j++)
{
if (i + j != iipolo)
{
u[n++] = vertices[indices[i + j]];
}
}
float minU = FastMath.Min(u[0].Tu, u[1].Tu);
Vertex.PositionColoredTexturedNormal pole = vertices[polos[p]];
//Chequea que no sea un triangulo rectangulo
Vertex.PositionColoredTexturedNormal zeroXZ = u[0];
bool noRectangulo = false;
if (u[0].X != 0 && u[0].Z != 0)
{
zeroXZ = u[0];
}
else if (u[1].X != 0 && u[1].Z != 0)
{
zeroXZ = u[1];
}
else
{
noRectangulo = true;
}
//Interpolo Tu1
if (basePoly.Equals(eBasePoly.ICOSAHEDRON) || noRectangulo)
{
pole.Tu = minU + FastMath.Abs(u[0].Tu - u[1].Tu) / 2;
}
else
{
pole.Tu = zeroXZ.Tu;
}
if (first) //Si es la primera vez que lo hago, modifico el vertice.
{
vertices[polos[p]] = pole;
first = false;
}
else //Sino lo duplico.
{
indices[iipolo] = vertices.Count;
vertices.Add(pole);
}
}
}
}
}
/// <summary>
/// Vuelve a crear la esfera si hubo cambio en el nivel de detalle, color o coordenadas de textura o si ForceUpdate esta en true.
/// </summary>
public virtual void updateValues()
{
if (!mustUpdate && !ForceUpdate)
{
return;
}
if (indexBuffer != null && !indexBuffer.Disposed)
{
indexBuffer.Dispose();
}
if (vertexBuffer != null && !vertexBuffer.Disposed)
{
vertexBuffer.Dispose();
}
//Obtengo las posiciones de los vertices e indices de la esfera
List <Vector3> positions;
createSphereSubdividingAPolyhedron(out positions, out indices);
///////
vertices = new List <Vertex.PositionColoredTexturedNormal>();
List <int> iverticesU1 = new List <int>();
int[] polos = new int[2];
int p = 0;
int c = color.ToArgb();
float twoPi = FastMath.TWO_PI;
//Creo la lista de vertices
for (int i = 0; i < positions.Count; i++)
{
Vector3 pos = positions[i];
float u = 0.5f + FastMath.Atan2(pos.Z, pos.X) / twoPi;
float v = 0.5f - 2 * FastMath.Asin(pos.Y) / twoPi;
vertices.Add(new Vertex.PositionColoredTexturedNormal(pos, c, UVTiling.X * u + UVOffset.X, UVTiling.Y * v + UVOffset.Y, pos));
if (u == 1 || esPolo(vertices[i]))
{
iverticesU1.Add(i);
if (u != 1)
{
polos[p++] = i;
}
}
}
//Corrijo los triangulos que tienen mal las coordenadas debido a vertices compartidos
fixTexcoords(vertices, indices, iverticesU1, polos);
verticesCount = vertices.Count;
triangleCount = indices.Count / 3;
Device d3dDevice = GuiController.Instance.D3dDevice;
vertexBuffer = new VertexBuffer(typeof(Vertex.PositionColoredTexturedNormal), verticesCount, d3dDevice,
Usage.Dynamic | Usage.WriteOnly, Vertex.PositionColoredTexturedNormal.Format, Pool.Default);
vertexBuffer.SetData(vertices.ToArray(), 0, LockFlags.None);
indexBuffer = new IndexBuffer(typeof(int), indices.Count, d3dDevice, Usage.Dynamic | Usage.WriteOnly, Pool.Default);
indexBuffer.SetData(indices.ToArray(), 0, LockFlags.None);
mustUpdate = false;
}
