How to Trans a color from Texure

[hnhhzy]

like this pic.how to trans the color(255,0,255)?

and how to get a source x,y to the texture2d?

make the pic is 5*5

[Wormbo]

Split it up if you want animations or do it by code. Translucency should really be done with alpha channels, not mask colors.

[hnhhzy]

thank you,i get it.

[KazeoHin]

You can really set up a material that adds the Red, Blue channels, Subtracts the green. Then set up an If statement that says if this end-result color = 2 (or 510 in the case of 0-255, unreal uses 0-1) then blend transparent, else blend normal.

[Wormbo]

Sure, you could do it, but an alpha channel is way more efficient.

[hnhhzy]

class AnimTexBase extends Actor;
var Texture            AnimTexture;          //AnimTexture
var float           AnimWidth;            //a animation width
var float           AnimHeight;           //a animation height
var float           AnimDrawIndex;        //play which group
var int             AnimIndex;            //play which animation
var float           PlayDelay;            //play delay time
var float           MaxIndex;             //max animation numbers;

//Start
simulated event PostBeginPlay()
{
    super.PostBeginPlay();
}

//draw Anim
simulated function DrawAnimTex(vector2D Pos,Canvas c)
{
    local float sourceX,sourceY;
    c.SetDrawColor(255, 255, 255);

    //set pos
    c.SetPos(Pos.X, Pos.Y);

    //get Texture source
    sourceX = AnimIndex * AnimWidth;
    sourceY = AnimDrawIndex * AnimHeight;

    //draw it.
    c.DrawTile(AnimTexture, AnimWidth, AnimHeight, sourceX, sourceY, AnimWidth, AnimHeight);

    return;
}

//change play AnimIndex
simulated function ChangeDrawIndex(float mouseIndex)
{
    AnimDrawIndex = mouseIndex;   //set play which group
    AnimIndex = 0;                //again head.
}

//start timer to change AnimIndex
simulated function StartDraw()
{
    if(!IsTimerActive(nameof(ChangeAnimImage)))
    {
        SetTimer(PlayDelay, true, nameof(ChangeAnimImage));
    }
}

//stop timer to change AnimIndex
simulated function StopDraw()
{
    if(IsTimerActive(nameof(ChangeAnimImage)))
    {
        ClearTimer(nameof(ChangeAnimImage));
    }
}

//Timer
function ChangeAnimImage()
{
    AnimIndex++;    
    if(AnimIndex == MaxIndex)  AnimIndex = 0;
}

DefaultProperties
{
    AnimWidth = 26
    AnimHeight = 26
    AnimDrawIndex = 1
    AnimIndex = 0
    PlayDelay = 0.1
    MaxIndex = 5
    AnimTexture=Texture2D'Effect.UI.Mouse0001tex'
} 

i was complete.so i share it.

in the HUD PostBeginPlay()
to StartDraw()
and in the HUD PostRender
to DrawAnimTex(Pos,Canvas);