public short AddVertice(VertexPositionNormalColor vertex)
{
short index = fNumberOfVertices;
fVertices[fNumberOfVertices++] = vertex;
return(index);
}
private int AddSphereVertex(Vector3 position, Vector3 origo, Color color)
{
VertexPositionNormalColor vertex = new VertexPositionNormalColor();
vertex.Position = position + origo;
vertex.Normal = Vector3.Zero;
vertex.Color = color;
int index = AddVertice(vertex);
return(index);
}
private short GetIndexYZ(short[,] matrix, int y, int z,
int segments,
float minY, float minZ, float x, float deltaY, float deltaZ, Color color)
{
short index = matrix[y, z];
if (index < 0)
{
float factorY = (float)y / segments;
float factorZ = (float)z / segments;
VertexPositionNormalColor vertex = new VertexPositionNormalColor();
vertex.Position = new Vector3(x, minY + factorY * deltaY, minZ + factorZ * deltaZ);
vertex.Normal = Vector3.Zero;
vertex.Color = color;
index = AddVertice(vertex);
matrix[y, z] = index;
}
return(index);
}
private short GetIndexXY(short[,] matrix, int x, int y,
int segments,
float minX, float minY, float z, float deltaX, float deltaY, Color color)
{
short index = matrix[x, y];
if (index < 0)
{
float factorX = (float)x / segments;
float factorY = (float)y / segments;
VertexPositionNormalColor vertex = new VertexPositionNormalColor();
vertex.Position = new Vector3(minX + factorX * deltaX, minY + factorY * deltaY, z);
vertex.Normal = Vector3.Zero;
vertex.Color = color;
index = AddVertice(vertex);
matrix[x, y] = index;
}
return(index);
}
private short GetIndexXZ(short[,] matrix, int x, int z,
int segments,
float minX, float minZ, float y, float deltaX, float deltaZ, Color color)
{
short index = matrix[x, z];
if (index < 0)
{
float factorX = (float)x / segments;
float factorZ = (float)z / segments;
VertexPositionNormalColor vertex = new VertexPositionNormalColor();
vertex.Position = new Vector3(minX + factorX * deltaX, y, minZ + factorZ * deltaZ);
vertex.Normal = Vector3.Zero;
vertex.Color = color;
index = AddVertice(vertex);
matrix[x, z] = index;
}
return(index);
}
public short AddVertice(VertexPositionNormalColor vertex)
{
PrimitiveTriangles primitive = fTriangles[fTriangles.Count - 1];
return(primitive.AddVertice(vertex));
}
/// <summary>
/// Init the plane
/// </summary>
private void InitPlane(
int segments,
float minX, float maxX, float minZ, float maxZ, float defaultY,
Color color)
{
if (segments > 180)
{
throw new Exception("To many segments");
}
fNumberOfSegments = segments;
fNumberOfPointsOnLine = segments + 1;
fNumberOfVertices = fNumberOfPointsOnLine * fNumberOfPointsOnLine;
fNumberOfLines = 2 * fNumberOfSegments * fNumberOfPointsOnLine;
fNumberOfTriangles = 2 * fNumberOfSegments * fNumberOfSegments;
int index;
// Init points
fVertices = new VertexPositionNormalColor[fNumberOfVertices];
Vector3 position = new Vector3();
position.Y = defaultY;
float deltaZ = maxZ - minZ;
float deltaX = maxX - minX;
for (int z = 0; z <= fNumberOfSegments; z++)
{
float factorZ = (float)z / fNumberOfSegments;
position.Z = minZ + factorZ * deltaZ;
for (int x = 0; x <= fNumberOfSegments; x++)
{
float factorX = (float)x / fNumberOfSegments;
position.X = minX + factorX * deltaX;
index = GetIndex(x, z);
fVertices[index] = new VertexPositionNormalColor(position, color);
}
}
// Init indices for lines
fIndicesForLines = new short[2 * fNumberOfLines];
index = 0;
for (int z = 0; z < fNumberOfPointsOnLine; z++)
{
for (int x = 0; x < fNumberOfSegments; x++)
{
fIndicesForLines[index++] = GetIndex(x, z);
fIndicesForLines[index++] = GetIndex(x + 1, z);
}
}
for (int z = 0; z < fNumberOfSegments; z++)
{
for (int x = 0; x < fNumberOfPointsOnLine; x++)
{
fIndicesForLines[index++] = GetIndex(x, z);
fIndicesForLines[index++] = GetIndex(x, z + 1);
}
}
// Init indices for triangles
fIndicesForTriangles = new short[3 * fNumberOfTriangles];
index = 0;
for (int z = 0; z < fNumberOfSegments; z++)
{
for (int x = 0; x < fNumberOfSegments; x++)
{
short i00 = GetIndex(x, z);
short i10 = GetIndex(x + 1, z);
short i01 = GetIndex(x, z + 1);
short i11 = GetIndex(x + 1, z + 1);
fIndicesForTriangles[index++] = i00;
fIndicesForTriangles[index++] = i10;
fIndicesForTriangles[index++] = i01;
fIndicesForTriangles[index++] = i10;
fIndicesForTriangles[index++] = i11;
fIndicesForTriangles[index++] = i01;
}
}
}
/// <summary>
/// Set a point on the plane
/// </summary>
/// <param name="x"></param>
/// <param name="z"></param>
/// <param name="point"></param>
public void SetPoint(int x, int z, VertexPositionNormalColor point)
{
fVertices[GetIndex(x, z)] = point;
}