Texture2D CreateHueTexture(int width, int height)
{
var tex = new Texture2D(width, height);
for (int y = 0; y < height; y++)
{
var h = 1f * y / height;
var color = IMColorUtil.HSVToRGB(h, 1f, 1f);
for (int x = 0; x < width; x++)
{
tex.SetPixel(x, y, color);
}
}
tex.Apply();
return(tex);
}
void DrawSVHandler(Rect rect, ref Color c)
{
const float size = 10f;
const float offset = 5f;
GUI.DrawTexture(new Rect(rect.x + s * rect.width - offset, rect.y + (1f - v) * rect.height - offset, size, size), circle);
var e = Event.current;
var p = e.mousePosition;
if (e.button == 0 && (e.type == EventType.MouseDown || e.type == EventType.MouseDrag) && rect.Contains(p))
{
s = (p.x - rect.x) / rect.width;
v = 1f - (p.y - rect.y) / rect.height;
c = IMColorUtil.HSVToRGB(h, s, v);
e.Use();
ClearPresetSelection();
}
}
void UpdateSVTexture(Color c, Texture2D tex)
{
float h, _s, _v;
IMColorUtil.RGBToHSV(c, out h, out _s, out _v);
var size = tex.width;
for (int y = 0; y < size; y++)
{
var v = 1f * y / size;
for (int x = 0; x < size; x++)
{
var s = 1f * x / size;
var color = IMColorUtil.HSVToRGB(h, s, v);
tex.SetPixel(x, y, color);
}
}
tex.Apply();
}
void DrawHueHandler(Rect rect, ref Color c)
{
const float size = 15f;
GUI.DrawTexture(new Rect(rect.x - size * 0.75f, rect.y + (1f - h) * rect.height - size * 0.5f, size, size), rightArrow);
GUI.DrawTexture(new Rect(rect.x + rect.width - size * 0.25f, rect.y + (1f - h) * rect.height - size * 0.5f, size, size), leftArrow);
var e = Event.current;
var p = e.mousePosition;
if (e.button == 0 && (e.type == EventType.MouseDown || e.type == EventType.MouseDrag) && rect.Contains(p))
{
h = 1f - (p.y - rect.y) / rect.height;
c = IMColorUtil.HSVToRGB(h, s, v);
UpdateSVTexture(c, svTexture);
e.Use();
ClearPresetSelection();
}
}
