public void CreateColorGradient(Texture2D tex, MBParticleColorBase p)
{
Color col;
for (int x = 0; x < tex.width; x++) {
col = p.GetGradientColor(x / (float)tex.width,false);
for (int y=0;y<tex.height;y++)
tex.SetPixel(x,y,col);
}
tex.Apply();
}
public void DoGradientGUI(MBParticleColorBase P)
{
bool lmbd = Event.current.type == EventType.MouseDown && Event.current.button == 0;
bool lmbu = Event.current.type == EventType.MouseUp && Event.current.button == 0;
bool drg = Event.current.type==EventType.MouseDrag;
bool dbl = lmbd && Event.current.clickCount > 1;
bool rmb = Event.current.type == EventType.MouseDown && Event.current.button == 1;
Vector2 mp= Event.current.mousePosition;
EditorGUILayout.BeginHorizontal();
GUILayout.Box("", new GUILayoutOption[] { GUILayout.MinHeight(24), GUILayout.ExpandWidth(true) });
Rect r = GUILayoutUtility.GetLastRect();
r = new Rect(r.x + 2, r.y + 2, r.width - 4, r.height - 4);
if (!mGradient && Event.current.type == EventType.Repaint){
mGradient=new Texture2D((int)r.width,(int)r.height, TextureFormat.RGB24, false);
CreateColorGradient(mGradient, P);
}
if (mGradient) {
EditorGUI.DrawPreviewTexture(r, mGradient);
for (int k = 0; k < P.Colors.Count; k++) {
Rect HandleRect = new Rect(r.x + P.Colors[k].t * r.width, r.y, 40, r.height);
// Delete Key?
if (rmb && HandleRect.Contains(mp) && P.Colors.Count>2 && k>0 && k<P.Colors.Count-1) {
P.Colors.Remove(P.Colors[k]);
CreateColorGradient(mGradient, P);
Event.current.Use();
}
// Begin Drag?
if (drg && !mDragging && k>0 && k<P.Colors.Count-1 && HandleRect.Contains(mp)) {
mDragging = true;
mDragKey = P.Colors[k];
mDragOffset = mp.x - HandleRect.x;
Event.current.Use();
}
// Drag?
if (Event.current.type==EventType.Repaint && mDragging && mDragKey==P.Colors[k]) {
mDragKey.t = (mp.x - r.x-mDragOffset) / r.width;
HandleRect = new Rect(r.x + mDragKey.t * r.width, r.y, 40, r.height);
NeedRepaint = true;
}
// Eat Down-Event to allow drag without opening Color Dialog
if (lmbd && HandleRect.Contains(mp))
Event.current.Use();
// End Drag or turn Up-Event into Down to trigger Color Dialog
if (lmbu) {
if (mDragging && mDragKey==P.Colors[k]) {
mDragging = false;
mDragKey = null;
CreateColorGradient(mGradient, P);
Event.current.Use();
}
else if (HandleRect.Contains(mp)) {
Event.current.type = EventType.MouseDown;
}
}
Color c = P.Colors[k].Color;
P.Colors[k].Color = EditorGUI.ColorField(HandleRect, P.Colors[k].Color);
if (c != P.Colors[k].Color)
CreateColorGradient(mGradient, P);
}
// New Key?
if (dbl && r.Contains(mp)) {
P.AddColorKey((mp.x-r.x)/r.width,mGradient.GetPixel((int)(mp.x-r.x), 4));
CreateColorGradient(mGradient,P);
NeedRepaint = true;
Event.current.Use();
}
}
GUILayout.Box("", GUIStyle.none, new GUILayoutOption[] { GUILayout.MinWidth(40), GUILayout.ExpandWidth(false) });
EditorGUILayout.EndHorizontal();
}
