void DrawGraph(MidiEnvelope env, float width, float height, int controlID)
{
const float scale = 2;
// Time parameters
var t1 = scale * env.AttackTime;
var t2 = t1 + scale * env.DecayTime;
var t3 = t2 + scale * 0.2f;
var t4 = t3 + scale * env.ReleaseTime;
// Position parameters
var x1 = 1 + width * t1;
var x2 = 1 + width * t2;
var x3 = 1 + width * t3;
var x4 = 1 + width * t4;
var sus_y = (1 - env.SustainLevel) * (height - 2) + 1;
// ADSR graph vertices
_graphVerts[0] = new Vector3(1, height);
_graphVerts[1] = new Vector3(x1, 1);
_graphVerts[2] = new Vector3(x2, sus_y);
_graphVerts[3] = new Vector3(x3, sus_y);
_graphVerts[4] = new Vector3(x4, height - 1);
_graphVerts[5] = new Vector3(width, height - 1);
// Background
EditorGUI.DrawRect(new Rect(0, 0, width, height), backgroundColor);
// Guide elements
var focus = GUIUtility.keyboardControl;
if (focus == controlID)
{
EditorGUI.DrawRect(new Rect(0, 0, x1, height), highlightColor);
}
else if (focus == controlID + 1)
{
EditorGUI.DrawRect(new Rect(x1, 0, x2 - x1, height), highlightColor);
}
else if (focus == controlID + 2)
{
EditorGUI.DrawRect(new Rect(0, sus_y, width, height), highlightColor);
}
else if (focus == controlID + 3)
{
EditorGUI.DrawRect(new Rect(x3, 0, x4 - x3, height), highlightColor);
}
Handles.color = guideColor;
DrawAALine(x1, 0, x1, height);
DrawAALine(x2, 0, x2, height);
DrawAALine(x3, 0, x3, height);
DrawAALine(x4, 0, x4, height);
DrawAALine(0, sus_y, width, sus_y);
// ADSR graph
Handles.color = LineColor;
Handles.DrawAAPolyLine(_graphVerts);
}
public void OnNoteOn(int channeIndex, byte rawKey, byte rawVel)
{
if (channeIndex != _channelIndex)
{
return;
}
// Try to find an inactive envelope.
MidiEnvelope env = System.Array.Find(_envelopePlayerPool, e => !e.isActive);
if (env == null)
{
return;
}
// Try to find an inactive visualisation object.
Transform noteViz = System.Array.Find(_noteVizPool, n => !n.gameObject.activeSelf);
if (!noteViz)
{
return;
}
// Copy envelope settings.
env.CopyFrom(_envelopeSetting);
// Start the envelope.
env.NoteOn();
// Use the channel info object to normalize and map incoming midi values.
float x = Mathf.InverseLerp(_channelInfo.noteKeyMin, _channelInfo.noteKeyMax, rawKey) * 2 - 1;
// Apply to visualisation object and activate.
noteViz.position = Vector3.right * x * 3;
noteViz.gameObject.SetActive(true);
// Store in active list.
_noteVizEnvPlaPairs.Add(new KeyValuePair <Transform, MidiEnvelope>(noteViz, env));
_envelopPlayerLookup.Add(rawKey, env);
}
