EZ Math Movie, Examples, Bounce a line

Animation

Here is an example that demonstrates the animation capibilities of EZ Math Movie. Basically, this program bounces two points around the bounds of the graph. These two points act as the endpoints for a line segment, and, thus, the line segment looks like it is bouncing off the edges of the graph.

Click the 'Go' button to make the program run. The 'Go' button looks like this:

setLineThickness(2);
setLineColor('black');

x1 = randomX();
y1 = randomY();
x2 = randomX();
y2 = randomY();

dx1 =  0.1;
dy1 =  0.1;
dx2 = -0.1;
dy2 = -0.1;

clearGraph();

x1 = x1 + dx1;

if(x1 > worldXMax)
{
  x1 = (2 * worldXMax) - x1;
	
  dx1 = -dx1;
}
else if(x1 < worldXMin)
{
  x1 = (2 * worldXMin) - x1;
	
  dx1 = -dx1;
}

y1 = y1 + dy1;

if(y1 > worldYMax)
{
  y1 = (2 * worldYMax) - y1;
	
  dy1 = -dy1;
}
else if(y1 < worldYMin)
{
  y1 = (2 * worldYMin) - y1;
	
  dy1 = -dy1;
}

x2 = x2 + dx2;

if(x2 > worldXMax)
{
  x2 = (2 * worldXMax) - x2;
	
  dx2 = -dx2;
}
else if(x2 < worldXMin)
{
  x2 = (2 * worldXMin) - x2;
	
  dx2 = -dx2;
}

y2 = y2 + dy2;

if(y2 > worldYMax)
{
  y2 = (2 * worldYMax) - y2;
	
  dy2 = -dy2;
}
else if(y2 < worldYMin)
{
  y2 = (2 * worldYMin) - y2;
	
  dy2 = -dy2;
}

drawLineSegment(x1, y1, x2, y2);

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EZ Math Movie, Examples, Bounce a line

Animation

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