how to attach a shader to a sprite?

[girng]

i have a shader in godot:

shader_type canvas_item;

uniform float aura_width=2;
uniform vec4 aura_color=vec4(0.4,0.7,0.3,1);
//uniform vec4 aura_color : hint_color;
void fragment() {
vec4 col = texture(TEXTURE,UV);
vec2 ps = TEXTURE_PIXEL_SIZE;
float a;
float maxa=col.a;
float mina=col.a;
a=texture(TEXTURE,UV+vec2(0,-aura_width)*ps).a;
maxa=max(a,maxa);
mina=min(a,mina);

a=texture(TEXTURE,UV+vec2(0,aura_width)*ps).a;

maxa=max(a,maxa);
mina=min(a,mina);
a=texture(TEXTURE,UV+vec2(-aura_width,0)*ps).a;

maxa=max(a,maxa);
mina=min(a,mina);
a=texture(TEXTURE,UV+vec2(aura_width,0)*ps).a;
maxa=max(a,maxa);
mina=min(a,mina);
col.rgb*=col.a;
COLOR=col;//mix(col,aura_color,maxa-mina);


//COLOR.rgb = vec3(aura_color[0],aura_color[1],aura_color[2]);
//COLOR.a = 0.1;
float auraa=(maxa-mina);

COLOR.rgb+=aura_color.rgb*(maxa-mina);
}

but i want to attach it to a sprite, so i can make it glow. i did some googling and searching but with no prevail ty

i got a nice is_overlap function too. so i can do onhover events on world objects. it's gonna be fun.

[zorg]

You set the shader you want to use, then draw the sprite you want to use the shader on.

http://blogs.love2d.org/content/let-it- ... characters
can be relevant, although it's probably for an older version; still some of the techniques may still apply.

[girng]

You set the shader you want to use, then draw the sprite you want to use the shader on.

http://blogs.love2d.org/content/let-it- ... characters
can be relevant, although it's probably for an older version; still some of the techniques may still apply.

ty. just read over it. followed it

got here

Code: Select all

shader_glow:send( "stepSize", {3/sprite2.image:getWidth(), 3/sprite2.image:getHeight()})
        love.graphics.setShader( shader_glow )
        love.graphics.draw(sprite2.image, body_x, body_y)
        love.graphics.setShader()

however. my sprite then disappears lol

but if i comment the setShader line, sprite appears, but with no shader.

hmm. i'm on latest 11.1 btw

gtx 950

[pgimeno]

That shader only draws the outline itself, not the sprite. After drawing it, you need to draw the sprite again.

When you say "glow", I'm not sure if you mean a bloom effect, or an outline. These are different effects.

If you mean bloom effect, this thread talks about it, viewtopic.php?t=82133 and I believe there are shader libraries that incorporate it as a pre-made effect.

If you mean outline, this thread talks about it: viewtopic.php?f=4&t=85284 and there's a post based on it with a shader that also draws the sprite, rather than having to be drawn separately: viewtopic.php?p=221215#p221215

[girng]

That shader only draws the outline itself, not the sprite. After drawing it, you need to draw the sprite again.

When you say "glow", I'm not sure if you mean a bloom effect, or an outline. These are different effects.

If you mean bloom effect, this thread talks about it, viewtopic.php?t=82133 and I believe there are shader libraries that incorporate it as a pre-made effect.

If you mean outline, this thread talks about it: viewtopic.php?f=4&t=85284 and there's a post based on it with a shader that also draws the sprite, rather than having to be drawn separately: viewtopic.php?p=221215#p221215

yes thx. however, i believe something is bugged because some of the shaders just show a white overlay over my sprite or just disappears them.

for example:
viewtopic.php?f=4&t=3733&start=200#p159576

this one is exactly what i want, and it just poofs my sprite (totally disappears).

am i rendering it in the right order?

Code: Select all

love.graphics.setShader( shader_glow )
love.graphics.draw(sprite2.image, body_x, body_y)
love.graphics.setShader()

[girng]

ok i think i got it.

i can't just copy and paste shaders online because the extern thing needs get data from :send?
i did :send and i am starting to see some of the outlines