Godot 黑白 shader
shader_type canvas_item;
void vertex() {
// Called for every vertex the material is visible on.
}
void fragment() {
COLOR = texture(TEXTURE,UV);
float a = (COLOR.r + COLOR.g + COLOR.b)/4.0;
float b = step(0.3,a);
COLOR.rgb = vec3(b);
// Called for every pixel the material is visible on.
}