Can you help me to make a scrolling emissive with a custom shader fragment?

Hitsu San

Hi guys,

I have no idea what i'm doing, let's be honest here. I've been looking for days for a way to make a scroll FX with a static mask in Toolbag3 but it's impossible with the base materials (i know i can use Main > Offset and keyframe it but that will move the transparency mask as well with horrible results).

I know my (visual editor) shaders but i've never learned how to code a simple glsl one so it's like i'm looking at an alien language right now ^^ any help will be extremely appreciated!

Defunct

I messed around a bit with example1.frag and I think I've got what you're looking for working.

//provides FragmentState
#include "../state.frag"

//provides misc params like 'uCustomTime'
#include "../other/customExtras.sh"

uniform vec3 uColor;		//color  name "Color"  default 1.0, 0.35, 0.2
uniform float uSpeed;		//name "Speed"  default 0.25  min 0  max 1
uniform float uBrightness;		//name "Brightness"  default 10  min 0  max 20
USE_TEXTURE2D(tEmissiveMask);		//name "Emissive Mask"
USE_TEXTURE2D(tScrollMask);		//name "Scrolling Mask"

void    ShaderExample1( inout FragmentState s )
{
	float mask = texture2D(tEmissiveMask, s.vertexTexCoord);
	vec2 scrolling_uv = vec2(uCustomTime*uSpeed, 0.0) + s.vertexTexCoord;
	float light = texture2D(tScrollMask, scrolling_uv);
    s.emissiveLight = uColor*light*uBrightness*mask;
}

//Use our function in the emissive slot.
#ifdef Emissive
    #undef Emissive
#endif
#define Emissive    ShaderExample1

change line 16 to "vec2 scrolling_uv = vec2(0.0, uCustomTime*uSpeed) + s.vertexTexCoord;" to scroll in the y axis instead of x

EarthQuake

Cool stuff!

Hitsu San

This is great ! Thank you very much!
here's a little addition

change :
line 7 with "uniform vec2 scroll; //name "Scroll" default 0, 0 min -5 max 5"
and
line 16 with " vec2 scrolling_uv = vec2(uCustomTime*scroll.x, uCustomTime*scroll.y) + s.vertexTexCoord;"

This way you can choose x,y direction and the amount you imput equals the speed