private void UpdateTextureColor(Texture2D original, Texture2D modified, int offsetX, int offsetY, int realWidth, int realHeight, int alphaOffsetX, int alphaOffsetY, float offsetMultiplier)
{
if (original == null || modified == null)
{
return;
}
Color[] pixels = original.GetPixels();
Color[] newPixels = modified.GetPixels();
int width = (int)Vector2.Distance(new Vector2(alphaOffsetX, alphaOffsetY), new Vector2(alphaOffsetX + realHeight, alphaOffsetY + realHeight));
int center = width / 2;
float angle = 0.0F;
if (styleProperties.colorType == ColorType.AxialGradient)
{
angle = styleProperties.angle;
}
float xStep = Mathf.Cos(Mathf.Deg2Rad * angle);
float yStep = Mathf.Sin(Mathf.Deg2Rad * angle);
Vector2 start = new Vector2(-xStep * realWidth, -yStep * realHeight);
Vector2 end = new Vector2(xStep * realWidth, yStep * realHeight);
Vector2 dir = end - start;
Vector2Int offset = Vector2Int.zero;
if (styleProperties.colorType != ColorType.SolidColor)
{
offset = styleProperties.offset;
}
for (int i = 0; i < pixels.Length; i++)
{
Color col = styleColor;
if (styleProperties.colorType != ColorType.SolidColor)
{
int x = i % original.width + offsetX;
int y = i / original.width + offsetY;
float gradientPercent;
if (styleProperties.colorType == ColorType.RadialGradient)
{
x -= (int)(offset.x * offsetMultiplier);
y -= (int)(offset.y * offsetMultiplier);
int distance = (x - center) * (x - center) + (y - center) * (y - center);
gradientPercent = Mathf.Sqrt(distance) / (float)center;
}
else // Gradient interface
{
x -= (int)(offset.x * offsetMultiplier);
y -= (int)(offset.y * offsetMultiplier);
Vector2 pix = new Vector2(x - center, y - center) * 2 - start;
float dot = Vector2.Dot(pix, dir);
dot *= 1 / dir.sqrMagnitude;
gradientPercent = dot;
}
col = styleProperties.gradient.Evaluate(Mathf.PingPong(gradientPercent, 1.0F));
}
newPixels[i].r = ColorUtils.OverlayBlend(pixels[i].r, col.r);
newPixels[i].g = ColorUtils.OverlayBlend(pixels[i].g, col.g);
newPixels[i].b = ColorUtils.OverlayBlend(pixels[i].b, col.b);
}
modified.SetPixels(newPixels);
modified.Apply();
}