ActionScript 3.0 :: Detect Angle Of A Line Drawn With API?
Jun 26, 2011
I'm drawing a simple line with API and I would like to know how to detect what angle the line has and where a ball hits it.Scenario: the player draws a random line in a random angle, a ball comes in from random points and hits the line, the ball then bounces off the line depending on where it hit the line (and of course depends on the line's angle).I draw the red line with this: (on a 400x400 stage)Actionscript Code:graphics.lineStyle(2, 0xFF0000, 100);graphics.moveTo(150, 150);graphics.lineTo(250, 250);The grey, green and purple lines are just demonstation of the ball movement, comming in from outside the screen, hitting the line and bouncing off in different directions. I just made a guess on the angle they will bounce off in.
I just can't figure out how to detect the line's angle and where the ball hits it. So all I have is a ball flying in from random positions and hitTests the line (not coded yet, but no problem to do ball movement and hitTesting with line), I don't know where to go from there until I know how to detect where it hits the line.I know this is a double post (from the Games section), but I realized this place seems to have more activity and not many seem to visit the Games place anymore.
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At the moment I am using two mini objects within the line to calculate the slope of the line I have.
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I'm trying to work out how to create a simple demo that works as follows: A ball falls from the top of the stage.Player is able to draw a line anywhere on the stage. The ball will bounce/roll along the line such that the player can guide it at will. I don't think the coordinate rotation will be a problem for me but I can't figure out how to transform a line drawn by the player into a hit detectable sprite -- or realkly any way that I can get those line coordinates into my coordinate rotation routine. To keep it simple, I'm just working on the first part of the problem, getting the line to where I can hit test or know its position.Here is my code so far:
package
{
import flash.display.Sprite;
import flash.events.MouseEvent;[code]........
It always traces 0,0 instead of my current line coordinates - and even those I don't think would be sufficient.
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Code:
0
|
[code]....
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Nov 2, 2010
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this is the thing: Using "lineTo" i get a line drawn on stage when dragging a mc. Then i should have four mc (note1, note2, note3, note4) added randomly over this line. I mean, the line is drawn and then over some parts of this line, using x and y of some of the points drawn there, this movie clips should be added randomly. I can make the mc appear randomly, but always in the same point (mouseX, mouseY); i cannot access others x and y of the drawn line. This is my code (noteContainer is a sprite):
Code:
private function drawingAPI(event:MouseEvent):void{
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}
[Code]...
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Mar 7, 2011
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Code:
// establish a new Vector object for the commands parameter
var line_commands:Vector.<int> = new Vector.<int>();
line_commands.push(1,2,2,2);
// establish a new Vector object for the data parameter
var line_coord:Vector.<Number> = new Vector.<Number>();
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[Code]....
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Actionscript Code:
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package
{
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[Code].....
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Code:
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[code]....
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