void DrawGradientVariable(Rect position, SerializedProperty property, GUIContent label)
{
EditorGUI.BeginProperty(position, label, property);
//Draw the label of the variable and set the position
position = EditorGUI.PrefixLabel(position, GUIUtility.GetControlID(FocusType.Passive), label);
//Set the box position
Rect boxRect = new Rect(position.x, position.y, position.width, 16);
//Draw a Box behind the Gradient
GUI.Box(boxRect, "");
//Set the gradient position
Rect gradientRect = new Rect(boxRect.position.x + 1, boxRect.position.y + 1, boxRect.width - 2, boxRect.height - 2);
//Draw gradient texture with a workaround method
PropertyDrawerMethods.DrawTexture(gradientRect, previewTexture);
//Set the Color of the Editor GUI to transparent
GUI.color = Color.clear;
//Draw the button of the Gradient Editor
if (GUI.Button(gradientRect, ""))
{
GradientEditor.Init(instance);
}
//Revert the Color of the Editor GUI
GUI.color = Color.white;
EditorGUI.EndProperty();
}
void DrawGradientTexture(SerializedProperty property)
{
if (instance == null)
{
instance = PropertyDrawerMethods.GetActualObjectForSerializedProperty <Jai.Graphics.Gradient>(fieldInfo, property);
}
if (previewTexture == null)
{
previewTexture = new Texture2D(256, 8);
}
int width = previewTexture.width;
int height = previewTexture.height;
Color[] colors = new Color[width * height];
Color bgColor = Color.clear;
for (int i = 0; i < width; i++)
{
float t = Mathf.Clamp01(((float)i) / ((float)width));
Color color = instance.Evaluate(t);
colors[i] = color * (color.a) + bgColor * (1f - color.a);
colors[i + width * 4] = color * (color.a) + bgColor * (1f - color.a);
}
for (int L = 0; L < height; L += 4)
{
for (int l = 0; l < 4; l++)
{
if ((L % height / 2) < 4)
{
System.Array.Copy(colors, 0, colors, L * width + l * width, width);
}
else
{
System.Array.Copy(colors, width * 4, colors, L * width + l * width, width);
}
}
}
previewTexture.SetPixels(0, 0, width, height, colors);
previewTexture.Apply();
}
