Knife Scratch

#include amxmodx
#include fakemeta

new decal

public plugin_init() {
	register_forward(FM_EmitSound, "forward_emit_sound")
	decal = engfunc(EngFunc_DecalIndex,"{bproof1")
	register_plugin("Knife Scratch", "1.0", "PahanCS")
}

public forward_emit_sound(id, channel, const Sound[]) {
	if(!equali(Sound, "weapons/knife_hitwall1.wav")) 
		return FMRES_IGNORED
	if(!is_user_alive(id)) 
		return FMRES_IGNORED
	static iStart[3], iEnd[3]
	get_user_origin(id, iStart)
	get_user_origin(id, iEnd, 3)
	if((pev(id, pev_button) & IN_ATTACK || pev(id, pev_oldbuttons) & IN_ATTACK) && get_distance(iStart, iEnd) < 66) {
		static ent, body
		get_user_aiming(id, ent, body)
		create_decal(iEnd, decal, true, ent)
	}
	else if((pev(id, pev_button) & IN_ATTACK2 || pev(id, pev_oldbuttons) & IN_ATTACK2) && get_distance(iStart, iEnd) < 51) {
		static ent, body
		get_user_aiming(id, ent, body)
		create_decal(iEnd, decal, true, ent)
	}
	else 
		return FMRES_SUPERCEDE 		// This therefor that was will not begin sound.
	return FMRES_IGNORED
}

stock create_decal(iOrigin[3], decal_index, bool:create_sparks = false, entity = 0) {
	if(decal_index && !entity) {
		message_begin(MSG_ALL, SVC_TEMPENTITY)
		write_byte(TE_WORLDDECAL)
		write_coord(iOrigin[0])
		write_coord(iOrigin[1])
		write_coord(iOrigin[2])
		write_byte(decal_index)
		message_end()
	}
	else if(decal_index && !is_user_alive(entity) && pev_valid(entity)) {
		message_begin(MSG_BROADCAST, SVC_TEMPENTITY)
		write_byte(TE_DECAL)
		write_coord(iOrigin[0])
		write_coord(iOrigin[1])
		write_coord(iOrigin[2])
		write_byte(decal_index)
		write_short(entity)
		message_end()
	}
	if(create_sparks) {
		message_begin(MSG_ALL, SVC_TEMPENTITY)
		write_byte(TE_SPARKS)
		write_coord(iOrigin[0])
		write_coord(iOrigin[1])
		write_coord(iOrigin[2])
		message_end()
	}
	return 1
}