public Color Evaluate(float time)
{
SortKeys();
GradientKey lastKey = keys[keys.Count - 1];
//If the time is over the time of the last key we return the last key color.
if (time > lastKey.time)
{
return(lastKey.color);
}
for (int i = 0; i < keys.Count - 1; i++)
{
GradientKey actualKey = keys[i];
GradientKey nextKey = keys[i + 1];
if (time >= actualKey.time && time <= keys[i + 1].time)
{
return(Color.Lerp(actualKey.color, nextKey.color, (time - actualKey.time) / (nextKey.time - actualKey.time)));
}
}
return(keys[0].color);
}
public void Initialize(Gradient gradient, Action <Gradient> onAffirmatedCallback)
{
foreach (GradientAlphaKey gradientAlphaKey in gradient.alphaKeys)
{
Vector2 parentSize = _alphaKeysParent.rect.size;
Vector2 localPos = Vector2.zero;
localPos.x = (gradientAlphaKey.time - _alphaKeysParent.pivot.x) * parentSize.x + (parentSize.x / 2);
GradientKey alphaKey = InstantiateGradientKey(localPos, _alphaKeysParent, true, gradientAlphaKey.time);
alphaKey.SetAlpha(gradientAlphaKey.alpha);
_alphasKeys.Add(alphaKey);
}
foreach (GradientColorKey gradientColorKey in gradient.colorKeys)
{
Vector2 parentSize = _colorKeysParent.rect.size;
Vector2 localPos = Vector2.zero;
localPos.x = (gradientColorKey.time - _colorKeysParent.pivot.x) * parentSize.x + (parentSize.x / 2);
GradientKey colorKey = InstantiateGradientKey(localPos, _colorKeysParent, false, gradientColorKey.time);
colorKey.SetColor(gradientColorKey.color);
_colorsKeys.Add(colorKey);
}
_onAffirmativeCallback = onAffirmatedCallback;
_gradient = gradient;
CreateTexture();
}
private GradientKey InstantiateGradientKey(Vector2 position, RectTransform parent, bool isAlpha, float time)
{
GradientKey gradientKey = (Instantiate(_gradientKeyItem, Vector3.zero, Quaternion.identity, parent));
RectTransform rt = gradientKey.GetComponent <RectTransform>();
rt.anchoredPosition = position;
rt.SetParent(parent);
gradientKey.Initialize(Guid.NewGuid().ToString("N"), isAlpha, time, _flexibleColorPicker, OnKeySelected, OnKeyDeleted, UpdateGradient);
return(gradientKey);
}
public void CreateColorKey(BaseEventData e)
{
if (_colorsKeys.Count < 8)
{
Vector2 v = FlexibleColorPicker.GetNormalizedPointerPosition(_colorKeysParent, e);
Vector2 parentSize = _colorKeysParent.rect.size;
Vector2 localPos = Vector2.zero;
localPos.x = (v.x - _colorKeysParent.pivot.x) * parentSize.x + (parentSize.x / 2);
GradientKey gradientKey = InstantiateGradientKey(localPos, _colorKeysParent, false, v.x);
_colorsKeys.Add(gradientKey);
UpdateGradient();
}
}
private void OnKeySelected(GradientKey selectedKey)
{
_alphasKeys.ForEach(t =>
{
if (t.Guid != selectedKey.Guid)
{
t.Deselect();
}
});
_colorsKeys.ForEach(t =>
{
if (t.Guid != selectedKey.Guid)
{
t.Deselect();
}
});
}
public Gradient(float[] positions, T[] values)
{
if (LerpFunc == null)
{
throw new NotSupportedException($"Gradient<{typeof(T).Name}>.lerpFunc is not defined.");
}
if (positions.Length != values.Length || positions.Length == 0)
{
throw new ArgumentException("Array lengths must be equal and not be zero.");
}
keys = new GradientKey[positions.Length];
for (int i = 0; i < keys.Length; i++)
{
keys[i] = new GradientKey(positions[i], values[i]);
}
}
private void UpdateGradient()
{
Texture2D tex = (Texture2D)_rawImage.texture;
int width = tex.width;
int height = tex.height;
Color[] pixels = new Color[width * height];
GradientAlphaKey[] gradientAlphaKeys = new GradientAlphaKey[_alphasKeys.Count];
GradientColorKey[] gradientColorKeys = new GradientColorKey[_colorsKeys.Count];
for (int i = 0; i < _alphasKeys.Count; i++)
{
GradientKey alphaKey = _alphasKeys[i];
gradientAlphaKeys[i].alpha = alphaKey.Alpha;
gradientAlphaKeys[i].time = alphaKey.Time;
}
for (int i = 0; i < _colorsKeys.Count; i++)
{
GradientKey colorKey = _colorsKeys[i];
gradientColorKeys[i].color = colorKey.Color;
gradientColorKeys[i].time = colorKey.Time;
}
_gradient.alphaKeys = gradientAlphaKeys;
_gradient.colorKeys = gradientColorKeys;
for (int x = 0; x < width; x++)
{
float normX = (float)x / (width - 1);
for (int y = 0; y < height; y++)
{
Color color = _gradient.Evaluate(normX);
int pixelIndex = x + y * width;
pixels[pixelIndex] = color;
}
}
tex.SetPixels(pixels);
tex.Apply();
}
private void OnKeyDeleted(GradientKey deletedKey)
{
if (deletedKey.IsAlpha)
{
if (_alphasKeys.Count > 1)
{
_alphasKeys.RemoveAll(t => t.Guid == deletedKey.Guid);
Destroy(deletedKey.gameObject);
UpdateGradient();
}
}
else
{
if (_colorsKeys.Count > 1)
{
_colorsKeys.RemoveAll(t => t.Guid == deletedKey.Guid);
Destroy(deletedKey.gameObject);
UpdateGradient();
}
}
}
public T GetValue(float time)
{
GradientKey left = null;
GradientKey right = null;
for (int i = 0; i < keys.Length; i++)
{
if (left == null || keys[i].time > left.time && keys[i].time <= time)
{
left = keys[i];
}
}
for (int i = keys.Length - 1; i >= 0; i--)
{
if (right == null || keys[i].time < right.time && keys[i].time >= time)
{
right = keys[i];
}
}
return(left.time == right.time ? left.value : LerpFunc(left.value, right.value, (time - left.time) / (right.time - left.time)));
}