I have a question about scaling. I'm making a boat game where if you hit a ramp I want the boat to look like it's jumping out of the water. This is a top down view game, so it would only be a scaling thing I would need for this effect. Just a touch of it. How would I control this so that when you hit a ramp the boat scales up a little then back to normal size. What events would be necessary for this and what calculations would I need to pull this off. I tried to do this and failed bad.
You could just use a animation. There is a built-in zoom function for stretching and shrinking a animation frame as a full animation.
Yeah, an animation would be the easiest way to do scaling, provided you only needed to choose from one or a few different heights. If the maximum scale of the boat would need to vary to give the appearance of different heights of jumping, a different technique would be needed.
If you want a much nicer looking effect (although somewhat more complicated), you could use a shadow object that would define the boat's actual position, and have a boat sprite displayed above it. For a jump, the boat could move upwards away from the shadow to give a 3D appearance. This may be a bit too advanced for what you are looking for, however.
+ Boat overlaps Ramp
+ Boat: Jump = 0
-> Boat: Set Jump to 180
+ Boat: Jump > 0
-> Boat: Set scale to: Sin(Jump("Boat")) * 0.5 + 1.0
-> Boat: Set Jump to max( 0, Jump - 3 )
Change "0.5" to adjust how extreme the scaling effect is.
Change "3" to adjust how quickly the boat goes up and down (ie. gravity).
You can also ignore player control while the boat is in the air (while Jump>0).
A slightly more complicated alternative would be to use the same maths as in a custom platform engine, instead of the sin() function. That way you could have the boat jump higher if it's going faster when it hits the ramp.
Shadows are good if the view is more like 3/4 perspective, but might look weird if the view is true top-down (it's worth trying though).
Here is an example of how to do it with scaling:
Also keep in mind that the jump height should be a product of the boat's current speed and ramp "height". That way you don't fly 100 feet in the air when you hit a ramp going 5 mph.
Originally Posted by Jaffob
Also keep in mind that the jump height should be a product of the boat's current speed and ramp "height". That way you don't fly 100 feet in the air when you hit a ramp going 5 mph.This would be funny to see in real life
Thank guys!
King_Cool, perfect as always!!
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