effects: start rework of screen effect

1 files changed, 16 insertions, 0 deletions

diff --git a/Assets/Shaders/Scanlines.gdshader b/Assets/Shaders/Scanlines.gdshader
new file mode 100644
index 0000000..4ed746c
--- /dev/null
+++ b/Assets/Shaders/Scanlines.gdshader
@@ -0,0 +1,16 @@
+shader_type canvas_item;
+
+uniform float count: hint_range(240, 480, 2) = 320;
+uniform float opacity: hint_range(0.0, 1.0, 0.01) = 0.3;
+
+void fragment() {
+	vec3 color = texture(SCREEN_TEXTURE, SCREEN_UV).rgb;
+	vec2 uv = SCREEN_UV;
+
+	vec2 line = vec2(sin(uv.y * count), cos(uv.y * count));
+	vec3 scanlines = vec3(line.y, line.x, line.y);
+
+	color += color * scanlines * opacity;
+
+	COLOR = vec4(color, 1.0);
+}
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