--- Roger Guay <[EMAIL PROTECTED]> wrote: > Sarah, Jim > > What I'm trying to do is trace a line in time as a > ball is moved across > the screen. Near as I can tell, I want the screen > to update but not > redraw (if that makes any sense?) I've done this in > ToolBook on the PC > but I much prefer to stay on my Mac. Here is a > description of my stack: > > Create a vertical line and label it "Yaxis" and an > horizontal line and > Label it "Xaxis" such that they intersect and > define the origin > somewhere near the lower left corner of your stack. > Create a brightly > colored circle graphic and name it "Ball." Create 2 > fields, one for > Theta so labeled which defines the angle from the > horizon that the ball > is being fired, and one for V so labeled which > defines the velocity of > the ball when fired. Create a "Fire" button and > insert the following > script: > > on MouseUp > global V, Xo, Yo, Theta, T, X > --put item 1 of the rect of graphic "Yaxis" into > Xo. Yaxis is a > vertical line and Xo,Yo define the origin of motion > --put item 4 of the rect of graphic "Yaxis" into > Yo. > put field "V" into V ---- try a value of about > 27 in field "V" > Put the value of field "Theta" into Theta > ----try a value of 1.2 in > field "Theta" > set the loc of graphic "mortor" to Xo,Yo ---- > Graphic "mortor" is a > small red round ball. > show graphic "mortor" > put 0 into T > put xo into x > put Yo into y > play "Mortor.aiff" > repeat while Y <= Yo + 1 > add 1 to T > put the value of (Xo+V*cos(Theta)*T ) into > x > put the value of (Yo - V*sin(Theta)*T + .5*T^2 > ) into Y > set the loc of graphic "mortor" to X,Y > wait 1 > end repeat > ---------- the rest of the script results in a > silly explosion at the > last location of the mortor ------- > play "Boom.aiff" > hide graphic "mortor" > set the loc of graphic "Burst" to x,Yo > repeat 35 > show graphic "burst" > wait 1 > hide graphic "burst" > wait 1 > end repeat > end MouseUp > > > > Jim has actually provided a solution for me that > works well if I insert > "wait .01" in his repeat loops. I can only assume > it has something to > do with processing speed of the computer (I'm using > a high end iMac > with OS X.) Without the "wait" command in the > repeat loop, Jim's > scripts are very choppy on my computer. > > Finally, as I say, Jim's solution works well but I > think it would > nevertheless be more "elegant" to do this as I have > in ToolBook where > one is able to stop the screen redraw. > > Thanks very much for joining in the fun, Roger >
Hi Roger, Have you had a look at the 'move' command? It's at the heart of the RunRev Animation Manager, and you should be able to create a smooth movement by setting a series of points and letting the object travel along those points with a 'move' statement. Just a thought, Jan Schenkel. ===== "As we grow older, we grow both wiser and more foolish at the same time." (La Rochefoucauld) __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com _______________________________________________ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
