Can anyone fix this shader problem for me? (Answered)

Mentiras

So I found this "portal" shader on youtube and hacked it together as best as I could. What I would like it to do is to keep the animation within the sprite, currently, it does not. I tried to get some help from another youtube shader guy (the original author has been mia for 2 years) but I have not been able to get the results I am looking for =/

    shader_type canvas_item;
    
    uniform float timescale = 0.5;
    
    uniform sampler2D normal;
    
    void fragment(){
    
    	NORMAL = texture(normal,UV).rgb * vec3(2.0,-2.0,1.0) - vec3(1.0,-1.0,0.0);
    	float PI = 3.14159265358979323844;
    	
    	vec2 shifted_UVs = UV - vec2(0.5,0.5);
    
    	vec2 angle_offset = vec2(cos(TIME*timescale)*0.6, sin(TIME*timescale)*0.6);
    	float angle = 0.5*atan(shifted_UVs.x+angle_offset.x, shifted_UVs.y+angle_offset.y)/PI;
    	
    	float wave_amplitude = 0.01;
    	float wave_number = 1.0;
    	float radius = length(shifted_UVs)+cos(TIME*2.1)*cos(angle*wave_number*PI+TIME)*sin(angle*wave_number);
    	
    	vec2 polar_TCs = vec2(radius*2.0, angle + 0.5);
    
    	vec2 screen_radius = vec2(0.02);
    	vec2 screen_angle = vec2(radius*radius*cos(TIME+angle*wave_number*PI*2.0), radius*radius*sin(TIME+angle));
    
    	vec2 screen_polar_SSCs = SCREEN_UV+vec2(screen_angle*screen_radius);
    
    	vec4 screen_texture = texture(SCREEN_TEXTURE, screen_polar_SSCs);
    	vec4 sprite_texture = texture(TEXTURE, polar_TCs);
    	
    	if(radius < 0.5){
    		if (sprite_texture.a < 0.25){
    			COLOR.rgba = screen_texture.rgba;
    		}
    		else{
    			COLOR.rgba = sprite_texture.rgba;
    		}
    	}
    	else{
    		discard;
    	}
    	}

Megalomaniak

You should perhaps link to the youtube videos you are talking about.

Mentiras

That's where I asked for help, and I tried but could not figure it out. and I could not find the original link, but ill keep looking and update if I do.

Megalomaniak

Aha, there we go, finally a comprehensible question(as in, clearly presenting the problem, or perhaps I just misread the first post):

So I found this portal shader on youtube and hacked it together as best as I could. What I'd like it to do is make the animation all contained inside the sprite I use (in this case the godot logo) what it does is animates and cuts off at the edges of the sprite.

change line 12 to:

                vec2 shifted_UVs = (UV - vec2(0.5,0.5)) * 2.0;

Mentiras

here is the original

Mentiras

Thank you very much. That was exactly what I was looking for =)