help:
	@echo ""
	@echo "Usage:"
	@echo ""
	@echo "	$(MAKE) view ........... Play the presentation"
	@echo ""
	@echo "	$(MAKE) html ........... Create the HTML output files"
	@echo ""
	@echo "	$(MAKE) ps ............. Create the PostScript output files"
	@echo ""

view:
	cd mgp && mgp rock.mgp

html: mgp/* jpg/*
	rm -rf html && mkdir -p html
	cd mgp && mgp -D ../html -g800x600 rock.mgp

ps: mgp/* jpg/*
	rm -rf ps && mkdir -p ps
	cd mgp && mgp2ps -f ../ps/mono.ps rock.mgp
	cd mgp && mgp2ps -c -f ../ps/color.ps rock.mgp

clean:
	rm -rf html ps