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lua/entities/ent_musical_keyboard/cl_init.lua

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+--[[
+| This file was obtained through the combined efforts
+| of Madbluntz & Plymouth Antiquarian Society.
+|
+| Credits: lifestorm, Gregory Wayne Rossel JR.,
+| 	Maloy, DrPepper10 @ RIP, Atle!
+|
+| Visit for more: https://plymouth.thetwilightzone.ru/
+--]]
+
+include( "shared.lua" )
+
+local blackKeys = {
+    [1] = true, [3] = true, [6] = true, [8] = true, [10] = true
+}
+
+local keyColors = {
+    default = Color( 255, 148, 77 ),
+    automated = Color( 171, 0, 197 )
+}
+
+local keyOffsets = {
+    [2] = 0.2,
+    [4] = 0.4,
+    [5] = -0.1,
+    [7] = 0.1,
+    [9] = 0.4,
+    [11] = 0.6
+}
+
+local Remap = math.Remap
+local RealTime = RealTime
+
+function ENT:Initialize()
+    self.drawNotes = {}
+end
+
+function ENT:EmitNote( note, velocity, instrument, automated )
+    local data = MKeyboard.instruments[instrument]
+
+    if not data then return end
+    if note < data.noteMin or note > data.noteMax then return end
+
+    sound.Play( string.format( data.path, note ), self:GetPos(), 80, 100, velocity / 127 )
+
+    local idx = note % 12
+    local len = 8
+    local height = -0.2
+    local width = 1.6
+    local x = -1.1
+
+    if blackKeys[idx] then
+        len = 5
+        height = 0.1
+        width = 1
+        x = -0.6
+    end
+
+    if keyOffsets[idx] then
+        x = x + keyOffsets[idx]
+    end
+
+    self.drawNotes[note] = {
+        x = Remap( note, 21, 108, -37, 36.7 ),
+        t = RealTime() + 0.2,
+        min = Vector( x, -1.5, -1 ),
+        max = Vector( x + width, len, height ),
+        color = keyColors[automated and "automated" or "default"]
+    }
+end
+
+function ENT:Draw()
+    self:DrawModel()
+
+    local t = RealTime()
+    local ang = self:GetAngles()
+
+    render.SetColorMaterial()
+
+    for note, p in pairs( self.drawNotes ) do
+        if t > p.t then
+            self.drawNotes[note] = nil
+        else
+            local color = p.color
+            local alpha = 255 * ( ( p.t - t ) / 0.2 )
+
+            render.DrawBox(
+                self:LocalToWorld( Vector( -p.x, 0, 0 ) ),
+                ang, p.min, p.max,
+                Color( color.r, color.g, color.b, alpha )
+            )
+        end
+    end
+end