| public static GaussFalloff ( float distance, float inRadius ) : float | ||
| distance | float | |
| inRadius | float | |
| return | float | |
public static Texture2D PaintLine(Vector2 from, Vector2 to, float rad, Color col, float hardness, Texture2D tex)
{
float width = rad * 2;
float extent = rad;
float stY = Mathf.Clamp(Mathf.Min(from.y, to.y) - extent, 0, tex.height);
float stX = Mathf.Clamp(Mathf.Min(from.x, to.x) - extent, 0, tex.width);
float endY = Mathf.Clamp(Mathf.Max(from.y, to.y) + extent, 0, tex.height);
float endX = Mathf.Clamp(Mathf.Max(from.x, to.x) + extent, 0, tex.width);
float lengthX = endX - stX;
float lengthY = endY - stY;
float sqrRad = rad * rad;
float sqrRad2 = (rad + 1) * (rad + 1);
Color[] pixels = tex.GetPixels((int)stX, (int)stY, (int)lengthX, (int)lengthY, 0);
Vector2 start = new Vector2(stX, stY);
//Debug.Log (widthX + " "+ widthY + " "+ widthX*widthY);
for (int y = 0; y < lengthY; y++)
{
for (int x = 0; x < lengthX; x++)
{
Vector2 p = new Vector2(x, y) + start;
Vector2 center = p + new Vector2(0.5f, 0.5f);
float dist = (center - Mathfx.NearestPointStrict(from, to, center)).sqrMagnitude;
if (dist > sqrRad2)
{
continue;
}
dist = Mathfx.GaussFalloff(Mathf.Sqrt(dist), rad) * hardness;
//dist = (samples[i]-pos).sqrMagnitude;
Color c = Color.white;
int index = (int)(y * lengthX + x);
//不能超过限度
index = Mathf.Min(pixels.Length - 1, index);
if (dist > 0)
{
c = Color.Lerp(pixels[index], col, dist);
}
else
{
c = pixels[index];
}
pixels[index] = c;
}
}
tex.SetPixels((int)start.x, (int)start.y, (int)lengthX, (int)lengthY, pixels, 0);
return(tex);
}
public static Texture2D Paint(Vector2 pos, float rad, Color col, float hardness, Texture2D tex)
{
var start = new Vector2(Mathf.Clamp(pos.x - rad, 0, tex.width), Mathf.Clamp(pos.y - rad, 0, tex.height));
var width = rad * 2;
var end = new Vector2(Mathf.Clamp(pos.x + rad, 0, tex.width), Mathf.Clamp(pos.y + rad, 0, tex.height));
var widthX = Mathf.Round(end.x - start.x);
var widthY = Mathf.Round(end.y - start.y);
var sqrRad = rad * rad;
var sqrRad2 = (rad + 1) * (rad + 1);
Color[] pixels = tex.GetPixels((int)start.x, (int)start.y, (int)widthX, (int)widthY, 0);
for (var y = 0; y < widthY; y++)
{
for (var x = 0; x < widthX; x++)
{
var p = new Vector2(x, y) + start;
var center = p + new Vector2(0.5f, 0.5f);
float dist = (center - pos).sqrMagnitude;
if (dist > sqrRad2)
{
continue;
}
var samples = Sample(p);
var c = Color.black;
for (var i = 0; i < samples.Length; i++)
{
dist = Mathfx.GaussFalloff(Vector2.Distance(samples[i], pos), rad) * hardness;
if (dist > 0)
{
c += Color.Lerp(pixels[y * (int)widthX + x], col, dist);
}
else
{
c += pixels[y * (int)widthX + x];
}
}
c /= samples.Length;
pixels[y * (int)widthX + x] = c;
}
}
tex.SetPixels((int)start.x, (int)start.y, (int)widthX, (int)widthY, pixels, 0);
return(tex);
}
public static Texture2D PaintLine(Vector2 from, Vector2 to, float rad, Color col, float hardness, Texture2D tex)
{
float num2 = rad;
float y = Mathf.Clamp(Mathf.Min(from.y, to.y) - num2, 0, tex.height);
float x = Mathf.Clamp(Mathf.Min(from.x, to.x) - num2, 0, tex.width);
float num5 = Mathf.Clamp(Mathf.Max(from.y, to.y) + num2, 0, tex.height);
float num7 = Mathf.Clamp(Mathf.Max(from.x, to.x) + num2, 0, tex.width) - x;
float num8 = num5 - y;
float num10 = (rad + 1) * (rad + 1);
Color[] colors = tex.GetPixels((int)x, (int)y, (int)num7, (int)num8, 0);
Vector2 vector = new Vector2(x, y);
for (int i = 0; i < num8; i++)
{
for (int j = 0; j < num7; j++)
{
Vector2 vector2 = new Vector2(j, i) + vector;
Vector2 point = vector2 + new Vector2(0.5f, 0.5f);
Vector2 vector4 = point - Mathfx.NearestPointStrict(from, to, point);
float sqrMagnitude = vector4.sqrMagnitude;
if (sqrMagnitude <= num10)
{
Color color;
sqrMagnitude = Mathfx.GaussFalloff(Mathf.Sqrt(sqrMagnitude), rad) * hardness;
var index0 = ((int)(i * num7)) + j;
//print(index0);
//print(colors.Length);
if (sqrMagnitude > 0)
{
color = Color.Lerp(colors[index0], col, sqrMagnitude);
}
else
{
color = colors[index0];
}
colors[index0] = color;
}
}
}
tex.SetPixels((int)vector.x, (int)vector.y, (int)num7, (int)num8, colors, 0);
return(tex);
}
