TouhouGD/render/shader/effect_slash.gdshader

shader_type spatial;
render_mode blend_add,unshaded,depth_test_disabled;

uniform sampler2D tex_main : source_color;
uniform sampler2D tex_noise : source_color;
uniform sampler2D tex_mask : source_color;
uniform sampler2D tex_mask2 : source_color;
uniform sampler2D screenTexture : hint_screen_texture;

void fragment() {
	vec4 col_main = texture(tex_main, UV);
	vec4 col_noise = texture(tex_noise, UV - 0.5 * vec2(mod(TIME, 2.0) - 1.0, 0));
	vec4 col_mask = texture(tex_mask, UV);
	vec4 col = col_mask * COLOR * 1.0 + (col_noise + col_main) * COLOR;
	
	vec4 col_mask2 = texture(tex_mask2, UV);
	float noiseValueX  = col_noise.r;
	float noiseValueY  = col_noise.r;
	vec2 noiseDistort = vec2(noiseValueX, noiseValueY) * 0.1 * col_mask2.r;
	vec3 distortedScreenTexture = vec3(texture(screenTexture, SCREEN_UV + noiseDistort).rgb);
	
	ALBEDO = (distortedScreenTexture *4.0 + col.rgb * col_mask.r) * COLOR.rgb;
	ALPHA = col_mask2.r * COLOR.a;
}