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1. To demonstrate an object launch to a target point

Descriptions:

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1. To move your object towards a location,provided targeted location and current location, you can suppose your current location origin and then get the relative position of the target location in polar coordinate.
2. This will give you the direction you need to travel.
3. Given the speed you want the object to travel,

4. Stepped example : (Click mouse to step)

   Processing
   Height 600 Width 600
   final int appwidth = 600; final int appheight = 600; final float stepsize = 10; boolean demostep = false; targetedobject myobject; class targetedobject{ // This is the object to move int mcurrentx, mcurrenty; // This will store the current location of the object int mtargetx, mtargety; // This will store the target location of the object float mrotation; // This is the current orientation of this object targetedobject( int x, int y, int r ){ // Initialize with coordinate and orientation mcurrentx = x; mtargetx = x; mcurrenty = y; mtargety = y; mrotation = r; } void updatedraw(){ //Draws the shape pushMatrix(); translate( mcurrentx, mcurrenty ); rotate( mrotation ); fill( 255,0,0 ); ellipse(0, 0, 40, 40); noFill(); stroke(255); strokeWeight(5); line( -10, 0, 10, 0 ); line( 10, 0, 5, -5 ); line( 10, 0, 5, 5 ); popMatrix(); } } void setup(){ size(appwidth , appheight); background(0); myobject = new targetedobject( width / 2, height / 2, 0 ); myobject.updatedraw(); } void draw(){ }