static void Diamond(Context ctx, IntPoint2 middle, int radius)
{
double v1, v2, v3, v4;
IntPoint2 p1, p2, p3, p4;
p1 = middle.Offset(0, -radius);
v1 = GetGridValue(ctx, p1);
p2 = middle.Offset(-radius, 0);
v2 = GetGridValue(ctx, p2);
p3 = middle.Offset(0, radius);
v3 = GetGridValue(ctx, p3);
p4 = middle.Offset(radius, 0);
v4 = GetGridValue(ctx, p4);
var avg = (v1 + v2 + v3 + v4) / 4;
var val = avg + GetRandom(ctx, ctx.Range);
ctx.Grid[middle] = val;
if (val < ctx.Min)
ctx.Min = val;
if (val > ctx.Max)
ctx.Max = val;
}
static void Rectangle(Context ctx, IntPoint2 middle, int radius)
{
var grid = ctx.Grid;
double v1, v2, v3, v4;
IntPoint2 p1, p2, p3, p4;
p1 = middle.Offset(radius, radius);
v1 = grid[p1];
p2 = middle.Offset(-radius, radius);
v2 = grid[p2];
p3 = middle.Offset(radius, -radius);
v3 = grid[p3];
p4 = middle.Offset(-radius, -radius);
v4 = grid[p4];
var avg = (v1 + v2 + v3 + v4) / 4;
var val = avg + GetRandom(ctx, ctx.Range);
grid[middle] = val;
if (val < ctx.Min)
ctx.Min = val;
if (val > ctx.Max)
ctx.Max = val;
}