Draw3D image disappears at distance

Randy · 09-21-2011 07:48 PM

I am using Image.Draw3D for drawing player names.

Close to camera it looks ok -

[Image: 3dtext1.png]

But on big distances image becomes invisible -

[Image: 3dtext2.png]

Image was created manually:

Code:

(*tmp_image).create2D(256, 256, IMAGE_B8G8R8A8);

and letters drawing by tmp_image->color() method

Imported images works fine at every distance, so I think problem in manually created image.

How can I fix this problem?

**Esenthel** · 09-21-2011 08:56 PM

Use D.text

Zervox · 09-21-2011 09:06 PM

also remember color might need setting alpha.
image.draw3D(color,size,angle,position,ALPHA_NONE); ?

Randy · 09-21-2011 09:16 PM

(09-21-2011 08:56 PM)Esenthel Wrote: Use D.text

In this case player names will be visible through objects and terrain.
I think billboards is the best solution.

The question is - what property of Image class responsible for rendering distance?

**Esenthel** · 09-21-2011 09:37 PM

there is D.textDepth or similar

Rofar · 09-21-2011 10:44 PM

You can do some ray casting and check for collisions with objects from the camera to the player to determine whether or not to display the text. That's what I do.

Randy · 09-21-2011 10:49 PM

(09-21-2011 09:37 PM)Esenthel Wrote: there is D.textDepth or similar

Thanks!
I found PosToScreen() + D.textDepth() + D.text() is very useful combination for player names/chat clouds drawing, but how about setting image distance draw parameter? Is it a secret? )

llynx · 09-21-2011 11:22 PM

(09-21-2011 10:49 PM)Randy Wrote: Thanks!
I found PosToScreen() + D.textDepth() + D.text() is very useful combination for player names/chat clouds drawing, but how about setting image distance draw parameter? Is it a secret? )

It's a function you should create that would fit your aesthetic requirements.

Randy · 09-21-2011 11:43 PM

(09-21-2011 11:22 PM)llynx Wrote:
(09-21-2011 10:49 PM)Randy Wrote: how about setting image distance draw parameter? Is it a secret? )

It's a function you should create that would fit your aesthetic requirements.

Engine automatically manages visibility of image (see screenshots), i just want to know how to configure it's parameters.

Driklyn · 09-22-2011 12:12 AM

(09-21-2011 09:37 PM)Esenthel Wrote: there is D.textDepth or similar

Wow, never knew...

Zervox · 09-22-2011 07:35 AM

(09-21-2011 11:43 PM)Randy Wrote:
(09-21-2011 11:22 PM)llynx Wrote:
(09-21-2011 10:49 PM)Randy Wrote: how about setting image distance draw parameter? Is it a secret? )

It's a function you should create that would fit your aesthetic requirements.

Engine automatically manages visibility of image (see screenshots), i just want to know how to configure it's parameters.

Did you try the alpha tip?

**Esenthel** · 09-22-2011 08:54 AM

Maybe you haven't called image.updateMipMaps

Randy · 09-22-2011 04:31 PM

(09-22-2011 08:54 AM)Esenthel Wrote: Maybe you haven't called image.updateMipMaps

Yes, now it's works!
(Previously I called .updateMipMaps() before .unlock() and it makes nothing without error)

But another question - Draw3D() automatically stretch image height equally to width, is it configurable?

Here a testing example of my code, based on '03 - World with Character.cpp' tutorial

replace

Code:

STRUCT(Player , Game::Chr)    

.....

};

with

Code:

STRUCT(Player , Game::Chr) // extend character structure by defining a player class based on the character

//{

   Memx<Game::Item> items;

   virtual Memx<Game::Obj>* itemContainer() {Memx<Game::Obj> &items=T.items; return &items;} // override default method of character, to return proper item container

           void updateItems(); // update items actions

   virtual Bool update     (); // here we'll update the player

   Player();

   UInt drawPrepare();

   void drawBlend();

   Image * img;

};

Image * CreateImage(Color col)

{    

    Image * tmp_image = new Image;

    (*tmp_image).create2D(256, 32, IMAGE_B8G8R8A8);

    tmp_image->lock();

    for (int x=0; x < tmp_image->x(); x++)

        for (int y=0; y<tmp_image->y(); y++)

        {

            Color c = col;

            tmp_image->color(x, y, c);

        }

    tmp_image->unlock();

    tmp_image->updateMipMaps(); // remove this to make image auto-disappearing at distance

    return tmp_image;

}

// Constructor

Player::Player()

{

    img = CreateImage(RED);

}

UInt Player::drawPrepare()

{

    UInt ret = super::drawPrepare();

    return IndexToFlag(RM_BLEND);

}

void Player::drawBlend()

{    

    SetMatrix();

    img->draw3D(Color(255,255,255,255), 1, 0, pos()+Vec(0,2,0));    

}

As you can see, red picture is always square.

(09-21-2011 09:06 PM)Zervox Wrote: also remember color might need setting alpha.
image.draw3D(color,size,angle,position,ALPHA_NONE); ?

Default mode=ALPHA_BLEND_DEC gives best results (fits my aesthetic requirements ; )

Draw3D image disappears at distance
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