/// <summary>
/// Gives a float array of specified attribute of particles in a specified rectangular area.
/// </summary>
/// <param name="rectX">Together with `rectY`: origin for a rectangular area which contains particles.</param>
/// <param name="rectY"></param>
/// <param name="rectWidth">Width of that area</param>
/// <param name="rectHeight">Height of that area</param>
/// <param name="partatt">Attribute whose array will be given. Only one attribute can be specified and "All" cannot be specified.</param>
public float[] GetParticles(int rectX, int rectY, int rectWidth, int rectHeight, ParticleAttribute partatt)
{
float[] result = new float[1];
bool xh = false, xv = false, xa = false, xs = false, xf = false;
if ((int)partatt == 1 || (int)partatt == 2 || (int)partatt == 4 || (int)partatt == 8 || (int)partatt == 16)
{
if (rectX < 0)
{
rectX = 0;
}
if (rectY < 0)
{
rectY = 0;
}
if (rectWidth + rectX > size)
{
rectWidth -= (int)(rectX + rectWidth) - size;
}
if (rectHeight + rectY > size)
{
rectHeight -= (int)(rectY + rectHeight) - size;
}
result = new float[rectWidth * rectHeight];
if (partatt == ParticleAttribute.Height)
{
xh = true;
}
if (partatt == ParticleAttribute.Velocity)
{
xv = true;
}
if (partatt == ParticleAttribute.Acceleration)
{
xa = true;
}
if (partatt == ParticleAttribute.Sustainability)
{
xs = true;
}
if (partatt == ParticleAttribute.Fixity)
{
xf = true;
}
int r = 0;
for (int y = rectY * size; y < rectY * size + rectHeight * size; y += size)
{
for (int x = rectX; x < rectX + rectWidth; x++)
{
if (xh)
{
result[r] = vd[x + y];
}
if (xv)
{
result[r] = vdv[x + y];
}
if (xa)
{
result[r] = vda[x + y];
}
if (xs)
{
result[r] = vds[x + y];
}
if (xf)
{
result[r] = Convert.ToSingle(vd_static[x + y]);
}
r += 1;
}
}
}
return(result);
}
/// <summary>
/// Sets particles' specified attribute(s) to a specified value in a specified rectangular area.
/// </summary>
/// <param name="rectX">Together with `rectY`: origin for a rectangular area which contains particles.</param>
/// <param name="rectY"></param>
/// <param name="rectWidth">Width of that area</param>
/// <param name="rectHeight">Height of that area</param>
/// <param name="value">Value to set the particles to.</param>
/// <param name="partatt">Attribute(s) that will be set.</param>
public void SetParticles(int rectX, int rectY, int rectWidth, int rectHeight, float value, ParticleAttribute partatt)
{
if (rectX < 0)
{
rectX = 0;
}
if (rectY < 0)
{
rectY = 0;
}
if (rectWidth + rectX > size)
{
rectWidth -= (rectX + rectWidth) - size;
}
if (rectHeight + rectY > size)
{
rectHeight -= (rectY + rectHeight) - size;
}
bool xh = false, xv = false, xa = false, xs = false, xf = false;
// Let's see which attributes we are gonna deal with.
if ((ParticleAttribute.All & partatt) == ParticleAttribute.All)
{
xh = true; xv = true; xa = true; xs = true; xf = true;
}
else
{
if ((ParticleAttribute.Height & partatt) == ParticleAttribute.Height)
{
xh = true;
}
if ((ParticleAttribute.Velocity & partatt) == ParticleAttribute.Velocity)
{
xv = true;
}
if ((ParticleAttribute.Acceleration & partatt) == ParticleAttribute.Acceleration)
{
xa = true;
}
if ((ParticleAttribute.Sustainability & partatt) == ParticleAttribute.Sustainability)
{
xs = true;
}
if ((ParticleAttribute.Fixity & partatt) == ParticleAttribute.Fixity)
{
xf = true;
}
}
for (int y = rectY * size; y < rectY * size + rectHeight * size; y += size)
{
for (int x = rectX; x < rectX + rectWidth; x++)
{
if (xh)
{
vd[x + y] = value;
}
if (xv)
{
vdv[x + y] = value;
}
if (xa)
{
vda[x + y] = value;
}
if (xs)
{
vds[x + y] = value;
}
if (xf)
{
vd_static[x + y] = Convert.ToBoolean(value);
}
}
}
}
