shader_type spatial;

uniform float progress = 0.;
uniform bool bad = false;

void fragment() {
	vec3 color = vec3(0., 1., 0.);
	float alpha_fac = 1.;
	if (bad) {
		color = vec3(1., 0., 0.);
		alpha_fac = sin(TIME * 15.) * .5 + 1.;
	}
	if (UV.x > progress) {
		ALPHA = 0.1;
	}
	ALPHA *= alpha_fac;
	ALBEDO = color;
}

void vertex() {
    mat4 modified_model_view = VIEW_MATRIX * mat4(
        INV_VIEW_MATRIX[0],
        INV_VIEW_MATRIX[1],
        INV_VIEW_MATRIX[2],
        MODEL_MATRIX[3]
    );
    MODELVIEW_MATRIX = modified_model_view;
}