private void UpdateVision(VisionPosition mp, float visionRange, int player, short groundLevel)
{
// clear local cache
if (raycastEnabled && _cacheVisible)
{
temporaryVisibleData.Clear();
}
if (!updateMethod)
{
UpdateVision1(mp, visionRange, player, groundLevel);
}
else
{
UpdateVision2(mp, visionRange, player, groundLevel);
}
}
private void UpdateVision2(VisionPosition mp, float visionRange, int player, short groundLevel)
{
int radius = Mathf.FloorToInt(visionRange / _localScale.x) - 1;
if (radius <= 0)
{
return;
}
int x0 = mp.x;
int y0 = mp.y;
int x = radius;
int y = 0;
int xChange = 1 - (radius << 1);
int yChange = 0;
int radiusError = 0;
while (x >= y)
{
for (var i = x0 - x; i <= x0 + x; i++)
{
DrawPixel(player, x0, y0, i, y0 + y, groundLevel);
DrawPixel(player, x0, y0, i, y0 - y, groundLevel);
}
for (var i = x0 - y; i <= x0 + y; i++)
{
DrawPixel(player, x0, y0, i, y0 + x, groundLevel);
DrawPixel(player, x0, y0, i, y0 - x, groundLevel);
}
y++;
radiusError += yChange;
yChange += 2;
if (((radiusError << 1) + xChange) > 0)
{
x--;
radiusError += xChange;
xChange += 2;
}
}
}
private void UpdateVision1(VisionPosition mp, float visionRange, int player, short groundLevel)
{
var visionPosition = GetWorldPosition(mp.x, mp.y);
var currentRowSize = 0;
var currentColSize = 0;
var rangeSqr = visionRange * visionRange;
var visionWidth = Mathf.RoundToInt(visionRange / _localScale.x);
var visionHeight = Mathf.RoundToInt(visionRange / _localScale.y);
var maxColSize = visionWidth;
var maxRowSize = visionHeight;
while (currentRowSize != maxRowSize && currentColSize != maxColSize)
{
var x = -currentColSize;
var y = -currentRowSize;
var dx = 1;
var dy = 0;
while (true)
{
// check current
var mx = mp.x + x;
var my = mp.y + y;
var p = GetWorldPosition(mx, my);
var diff = p - visionPosition;
if (mx >= 0 && mx < width && my >= 0 && my < height)
{
if (diff.sqrMagnitude < rangeSqr)
{
var blocked = raycastEnabled && IsBlocked(groundLevel, mx, my, mp.x, mp.y);
if (!blocked)
{
visionData.StoreFlagValue(player, mx, my);
previousVisionData.StoreFlagValue(player, mx, my);
}
}
}
if (x + dx > currentColSize)
{
dx = 0;
dy = 1;
}
if (y + dy > currentRowSize)
{
dx = -1;
dy = 0;
}
if (x + dx < -currentColSize)
{
dx = 0;
dy = -1;
}
if (y + dy < -currentRowSize)
{
// completed the cycle
break;
}
x += dx;
y += dy;
}
if (currentRowSize < maxRowSize)
{
currentRowSize++;
}
if (currentColSize < maxColSize)
{
currentColSize++;
}
}
}