/// <summary>
/// Determines if there is overlap in the non-transparent pixels between two Color arrays.
/// </summary>
/// <param name="dataA">The first Color array.</param>
/// <param name="destA">The destination rectangle for Color array A.</param>
/// <param name="srcA">The source rectangle for Color array A.</param>
/// <param name="srcA">The width of each line in Color array A.</param>
/// <param name="dataB">The second Color array.</param>
/// <param name="destB">The destination rectangle for Color array B.</param>
/// <param name="srcB">The source rectangle for Color array B.</param>
/// <param name="srcB">The width of each line in Color array B.</param>
public static bool PerPixelIntersect(Color[] dataA, Rectangle destA, Rectangle srcA, int dataAWidth,
Color[] dataB, Rectangle destB, Rectangle srcB, int dataBWidth)
{
if (destA.Intersects(destB))
{
int top = Math.Max(destA.Top, destB.Top);
int bottom = Math.Min(destA.Bottom, destB.Bottom);
int left = Math.Max(destA.Left, destB.Left);
int right = Math.Min(destA.Right, destB.Right);
for (int y = top; y < bottom; y++)
{
for (int x = left; x < right; x++)
{
int xA = srcA.Left + (x - destA.Left);
int yA = srcA.Top + (y - destA.Top);
Color colorA = dataA[xA + (yA * dataAWidth)];
int xB = srcB.Left + (x - destB.Left);
int yB = srcB.Top + (y - destB.Top);
Color colorB = dataB[xB + (yB * dataBWidth)];
if (colorA.A != 0 && colorB.A != 0)
return true;
}
}
}
return false;
}
/// <summary>
/// Determines if there is overlap in the non-transparent pixels between two Color arrays.
/// </summary>
/// <param name="dataA">The first Color array.</param>
/// <param name="destA">The destination rectangle for Color array A.</param>
/// <param name="dataB">The second Color array.</param>
/// <param name="destB">The destination rectangle for Color array B.</param>
public static bool PerPixelIntersect(Color[] dataA, Rectangle destA, Color[] dataB, Rectangle destB)
{
if (destA.Intersects(destB))
{
int top = Math.Max(destA.Top, destB.Top);
int bottom = Math.Min(destA.Bottom, destB.Bottom);
int left = Math.Max(destA.Left, destB.Left);
int right = Math.Min(destA.Right, destB.Right);
for (int y = top; y < bottom; y++)
{
for (int x = left; x < right; x++)
{
Color colorA = dataA[x - destA.Left + ((y - destA.Top) * destA.Width)];
Color colorB = dataB[x - destB.Left + ((y - destB.Top) * destB.Width)];
if (colorA.A != 0 && colorB.A != 0)
return true;
}
}
}
return false;
}
