internal static void Build(PointModel model, int nx, int ny, int nz, float radius, float minValue, float maxValue)
{
Random positionRandom = new Random();
Random colorRandom = new Random();
Vertex min = new Vertex(), max = new Vertex();
bool isInit = false;
unsafe
{
for (long i = 0; i < model.PointCount; i++)
{
float x = minValue + ((float)positionRandom.NextDouble()) * (maxValue - minValue);
float y = minValue + ((float)positionRandom.NextDouble()) * (maxValue - minValue);
float z = minValue + ((float)positionRandom.NextDouble()) * (maxValue - minValue);
if (!isInit)
{
min = new Vertex(x, y, z);
max = new Vertex(x, y, z);
isInit = true;
}
if (x < min.X)
{
min.X = x;
}
if (x > max.X)
{
max.X = x;
}
if (y < min.Y)
{
min.Y = y;
}
if (y > max.Y)
{
max.Y = y;
}
if (z < min.Z)
{
min.Z = z;
}
if (z > max.Z)
{
max.Z = z;
}
Vertex *positions = model.Positions;
positions[i].X = x;
positions[i].Y = y;
positions[i].Z = z;
ByteColor *colors = model.Colors;
colors[i].red = (byte)colorRandom.Next(0, 256 / 2);// 256 / 2 is max color in byte.
colors[i].green = (byte)colorRandom.Next(0, 256 / 2);
colors[i].blue = (byte)colorRandom.Next(0, 256 / 2);
}
model.BoundingBox.MaxPosition = max;
model.BoundingBox.MinPosition = min;
}
}