Animated textures?

by thojoh370 on 07/01/2007 14:27, 24 messages, last message: 07/23/2007 22:09, 13473 views, last view: 05/02/2024 00:39

Does Sauerbraten support any filetype that can be animated? I know that GIF can be animated so I tried to source-edit Sauerbraten so that it loads GIF files instead of JPG, but it didn't want to show the GIF images in-game.

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#1: ..

by scyper on 07/02/2007 10:59

As far as i know, Sauerbraten does not support animated textures.

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#2: Re: ..

by thojoh370 on 07/03/2007 11:14, refers to #1

Couldn't that be implemented, then? So that it loads images in sequences, e.g.:
light_1.jpg > 1second > light_2.jpg > 1second > light3.jpg > ...

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#3: Re: ..

by a baby rabbit on 07/03/2007 12:31, refers to #2

In theory shaders support a time parameter, so you could tile images in a single big image and then write a shader to flip between them...

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#4: Caustics?

by thojoh370 on 07/05/2007 21:07

But hey! The caustics are animated, no? Then why shouldn't it be possible to do the same with textures?

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#5: Re: Caustics?

by Eris on 07/10/2007 21:03, refers to #4

I wonder too.

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#6: crude animation shader

by a baby rabbit on 07/11/2007 16:12

Ok, so tile 16 images within a single image in a 4x4 grid. Apply the following shader to the texture (note that depending on where you place the texture, you'll get a different animation order... but hey - proof of concept)

shader 0 "movie" [
@vpstart
TEMP dtc;

DP3 dtc.x, opos, program.env[0];
DP3 dtc.y, opos, program.env[1];

TEMP off;
MUL off, program.env[6], 1; //animation rate

FRC off.x, off.x;
MUL off.x, off.x, 4; // thus 4x4 tiled image
FLR off, off;
ADD dtc, dtc, off;
MUL result.texcoord[0].xy, dtc, 0.25; // 1/4

DP3 result.texcoord[1].x, state.matrix.texture[1].row[0], vertex.texcoord[1];
DP3 result.texcoord[1].y, state.matrix.texture[1].row[1], vertex.texcoord[1];
@fogcoord
END
] [
@fpstart
OPTION ARB_fog_linear;
TEMP diffuse, lm;
TEX diffuse, fragment.texcoord[0], texture[0], 2D;
TEX lm, fragment.texcoord[1], texture[1], 2D;
MUL diffuse, diffuse, 2;
MUL result.color, diffuse, lm;
END
]

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#7: Re: crude animation shader

by thojoh370 on 07/11/2007 17:29, refers to #6

I am unsure I understood what you meant.

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#8: Re: crude animation shader

by MeatROme on 07/11/2007 18:25, refers to #6

nice one,
works like a charm :)

thojoh370: (in reply to #7)
make yourself a texture - 64x64 pixels, transparent background.

Now paste 4 images (e.g. the four frames of your animation) into it.
Start off bottom right for frame #1,
bottom left frame #2,
top right frame #3 ... guess where frame #4 goes ...
... save as png and put it somewhere inside the sauerbraten packages tree (I'm assuming it's gonna end up as packages/base/vid.png).

Then paste the shader script into your autoexec.cfg; modify two lines - because your just using a 2x2 animation grid ... hope this helps you get to grips with what the shader is doing a little better ... instead of just copy-paste w/o understanding :)
You need to modify the lines 12 and 15 - change them to the following (respectively):
MUL off.x, off.x, 2; // thus 2x2 tiled image
MUL result.texcoord[0].xy, dtc, 0.5; // 1/2

then create packages/base/test.cfg and put following two lines into it:
setshader movie
texture 0 base/vid.png

now fire up sauerbraten and go
/newmap
/savemap test
/map test
..raise a piece of wall,
select a single cube
/edittex +1000
/savemap

HTH
and - yeah, that helped : baby-rabbit :)

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#9: ..

by slider on 07/11/2007 19:18

wow !!!! has anybody uploaded a u-tube video of this implemented. I would love to see this in action.

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#10: Re: crude animation shader

by Quin on 07/11/2007 20:14, refers to #6

Nice, thank you for taking the time to write that for everyone and share it. The possibilities for this are endless :)

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#11: Re: viewing pleasure

by MeatROme on 07/11/2007 20:36, refers to #9

Heh, why a movie ... take this demo map:
http://www.quadropolis.us/node/717

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#12: Re: crude animation shader

by Rainforce on 07/11/2007 20:44, refers to #6

realy nice...er...but the order of the picture belongs to the place of the cube... wrong place ends up in number chaos like: #13 #12 #15 #14 #9 #8 #10 #11
confusing, eh?
hope somebody fix this, but for the first time of animated tex it's great

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#13: Re: crude animation shader

by a baby rabbit on 07/12/2007 17:21, refers to #12

Fussy critters.... Okay, now always animates in the same order - also minus the lightmap stuff, since I figure a 'movie screen' probably emits light.

shader 0 "movie" [
@vpstart
DP3 result.texcoord[0].x, opos, program.env[0];
DP3 result.texcoord[0].y, opos, program.env[1];
TEMP off;
MUL off, program.env[6], 1; // animation rate
FRC off.x, off.x;
MUL off.x, off.x, 4; // thus 4x4 tiled image
FLR result.texcoord[2].xy, off;
@fogcoord
END
] [
@fpstart
OPTION ARB_fog_linear;
TEMP dtc;
FRC dtc, fragment.texcoord[0];
ADD dtc, dtc, fragment.texcoord[2];
MUL dtc, dtc, 0.25; // 1/4 - so correct scaling
TEX result.color, dtc, texture[0], 2D;
END
]

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#14: Re: crude animation shader

by Rainforce on 07/12/2007 19:06, refers to #13

hm... I think both versions are important. This one is good if you try to make thinks like a screen were text rushes through.

I hope that there are more posts like this one...

another question: how do you know how to make this?

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#15: ..

by Eris on 07/12/2007 23:32

leet man

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#16: Re: crude animation shader

by Passa on 07/13/2007 01:36, refers to #13

Wow baby rabbit, thats really impressive stuff :)

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#17: ..

by Acord on 07/13/2007 15:13

This is gonna get used. Zer gut.

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#18: Re: crude animation shader

by kurtis84 on 07/13/2007 16:03, refers to #14

he knows how to make this, because the shader language is STANDARD OPENGL stuff, it's NOT sauer-specific people.

We can just "live and learn", but a bit of reading helps that along ;)

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#19: Re: crude animation shader

by kurtis84 on 07/13/2007 16:04, refers to #18

btw baby-rabbit, it's a nice script :)

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#20: heeh

by Eris on 07/15/2007 12:18

thats how you get streetcred n props

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