o3de/Assets/Engine/Scripts/Entities/Others/Comment.lua

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--
-- Copyright (c) Contributors to the Open 3D Engine Project.
-- For complete copyright and license terms please see the LICENSE at the root of this distribution.
--
-- SPDX-License-Identifier: Apache-2.0 OR MIT
--
--
--  Description: Comment system.
--
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--  $Id$
--  $DateTime$
--  Description: Comment system.
--
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Comment =
{
    Properties =
    {
        Text = "This is a comment",
        fSize = 1.2,    --[0.0, 100.0 , 0.1, ""]
        bHidden = 0,
        fMaxDist = 100,    --[0.0 ,255.0 , 0.1, ""]
        nCharsPerLine = 30,    --[1, 255, 1, ""]
        bFixed = 0,
        clrDiffuse = { x=1,y=0.5,z=0 },
    },

    Editor={
        Model="Editor/Objects/comment.cgf",
        Icon="Comment.bmp",
    },
    
    hidden = 0,
    lines = {},
    lineCount = 0,
    fMaxDistSquared = 0,
    bNoUpdateInGame = 1,
}


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function Comment:OnLoad(table)
  self.hidden = table.hidden;  
end

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function Comment:OnSave(table)
  table.hidden = self.hidden;
end

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function Comment:OnInit()    
    -- Delete when not in dev-mode.
    if (not System.IsDevModeEnable() ) then
        self:DeleteThis();
        return;
    end

    self:OnReset();
end

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function Comment:OnSpawn()
end

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function Comment:OnPropertyChange()
    self:OnReset();
end

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function Comment:OnReset()
    -- Comment is only Active(OnUpdate() will be called) when in Editor or when cl_comment > 0
    local cl_comment = System.GetCVar("cl_comment")
    if (System.IsEditor() or cl_comment > 0) then
        self:SetUpdatePolicy( ENTITY_UPDATE_VISIBLE );
        self:Activate(1)
    else
        self:Activate(0);
    end

    -- bNoUpdateInGame is checked in OnUpdate() to account for in-editor game mode.
    if (cl_comment == 0) then
        self.bNoUpdateInGame = 1;
    else
        self.bNoUpdateInGame = 0;
    end

    self.fMaxDistSquared = self.Properties.fMaxDist * self.Properties.fMaxDist;

    self.hidden = self.Properties.bHidden;
    self.lines = {};
    
    -- process the text and line-break it
    local maxLength = self.Properties.nCharsPerLine;
    local curLength = 0;
    local curText = "";
    local curLine = 1;
    
    for char in string.gfind(self.Properties.Text, ".") do
        if (char == " ") then
            -- word finished ... see if we are over the limit
            if (curLength > maxLength) then
                -- commit line
                self.lines[curLine] = curText;
                curLine = curLine + 1;
                curText = "";
                curLength = 0;
                -- "consume" the whitespace
                char = "";
            end
        end
        if (char ~= "") then
            -- append char
            curText = curText..char;
            curLength = curLength + 1;
        end
    end
    
    self.lines[curLine] = curText;
    self.lineCount = curLine;

    self:OnUpdate(0);
end

-------------------------------------------------------
function Comment:OnUpdate(delta)
    if (self.hidden ~= 0 or self:IsHidden() or self.Properties.Text =="" or (self.bNoUpdateInGame == 1 and not System.IsEditing())) then
        return;
    end

    -- calculate alpha
    local alpha = 0;
    local factor = 0;

    if (self.fMaxDistSquared>0) then
        local mypos = g_Vectors.temp_v1;

        self:GetWorldPos(mypos);
        SubVectors(mypos, mypos, System.GetViewCameraPos());

        local distSquared = LengthSqVector(mypos);
        factor = distSquared;

        if (self.Properties.fMaxDist >= 255.0) then
            alpha = 1.0;
        elseif (distSquared<self.fMaxDistSquared) then
            alpha = distSquared/self.fMaxDistSquared;
            alpha = 1.0 - alpha*alpha;
        end
    end
    
    -- draw text
    local increment = System.GetViewCameraUpDir();
    
    if (alpha>0.001) then
        local pos = self:GetWorldPos( g_Vectors.temp_v1 );
        
        factor = math.sqrt(factor);
        factor = (self.Properties.fSize/60) * factor * System.GetViewCameraFov();    
        
        local incrementAll = g_Vectors.temp_v4;
        FastScaleVector(increment, increment, factor);
        FastScaleVector(incrementAll, increment, (self.lineCount / 2 + 1));
        
        -- start all the way at the top
        FastSumVectors(pos, pos, incrementAll);
        
        local textColor = { x=0, y=1, z=0 };    -- default color is for (bFixed == 1)
        if (self.Properties.bFixed ~= 1) then
            textColor = {x=self.Properties.clrDiffuse.x, y=self.Properties.clrDiffuse.y, z=self.Properties.clrDiffuse.z};
        end
        
        for i,val in ipairs(self.lines) do
            System.DrawLabel( pos, self.Properties.fSize, val, textColor.x, textColor.y, textColor.z, alpha );
            -- decrement the increment
            FastDifferenceVectors(pos, pos, increment);
        end
    end
end

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function Comment:Event_UnHide(sender)    
    BroadcastEvent(self, "UnHide");
    self.hidden = 0;
end

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function Comment:Event_Hide(sender)    
    BroadcastEvent(self, "Hide");
    self.hidden = 1;
end

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Comment.FlowEvents =
{
    Inputs =
    {
        Hide = { Comment.Event_Hide, "bool" },
        UnHide = { Comment.Event_UnHide, "bool" },
    },
    Outputs =
    {
        Hide = "bool",
        UnHide = "bool",
    },
}