public static Point GetEndPoint(ClockHand clockHand, int handLength, DateTime dateTime, Point origin, bool is24HourClock = true)
{
var hour = dateTime.Hour;
var minute = dateTime.Minute;
var second = dateTime.Second;
switch (clockHand)
{
case ClockHand.Hour:
var degreesPerHour = is24HourClock ? DEGREES_PER_HOUR_ON_A_24_HOUR_CLOCK : DEGREES_PER_HOUR_ON_A_12_HOUR_CLOCK;
var degreesPerMinute = is24HourClock ? DEGREES_OF_HOUR_HAND_PER_MINUTE_ON_A_24_HOUR_CLOCK : DEGREES_OF_HOUR_HAND_PER_MINUTE_ON_A_12_HOUR_CLOCK;
return(AddXYOffset(origin, GetEndPoint(handLength, HOUR_HAND_ANGLE_AT_MIDNIGHT - (hour * degreesPerHour + minute * degreesPerMinute))));
case ClockHand.Minute:
return(AddXYOffset(origin, GetEndPoint(handLength, HOUR_HAND_ANGLE_AT_MIDNIGHT - minute * DEGREES_PER_MINUTE)));
case ClockHand.Second:
return(AddXYOffset(origin, GetEndPoint(handLength, HOUR_HAND_ANGLE_AT_MIDNIGHT - second * DEGREES_PER_SECOND)));
default:
throw new ArgumentException("Invalid clock hand selection");
}
}
private void runAnimation()
{
Rectangle outerBox = new Rectangle(50, 50, 250, 400);
Rectangle innerBox = new Rectangle(60, 60, 240, 210);
Circle clockFace = new Circle(150, 300, 80);
RectangleF innerBoxBound = new RectangleF(60, pnlMain.Height - 210, 180, 150);
string[] clockNumbers = new string[] {
"12", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11"
};
DrawString[] strs = new DrawString[12];
for (int k = 0; k < 12; k++)
{
strs[k] = new DrawString(clockNumbers[k], clockFace.getCenter().x, clockFace.getCenter().y);
strs[k].translate(0, clockFace.getRadius() - 10.0f);
strs[k].fixedRotate(-(Math.PI * 2.0f * (k / 12.0f)), clockFace.getCenter());
}
ClockHand hourHand = new ClockHand(clockFace.getCenter().x, clockFace.getCenter().y, 50, 10);
ClockHand minuteHand = new ClockHand(clockFace.getCenter().x, clockFace.getCenter().y, 70, 7.5);
ClockHand secondHand = new ClockHand(clockFace.getCenter().x, clockFace.getCenter().y, 70, 5);
double theta = -Math.PI / 10.0f;
const float gravity = 10.0f;
const float pendConst = 70.0f;
Pendulum pendulum = new Pendulum(clockFace.getCenter().x, clockFace.getCenter().y, 200, 10, 20, Color.Black);
pendulum.rotate(theta);
float angularAcceleration = -(gravity / 200.0f) * (float)Math.Sin(theta);
float angularVelocity = 0;
float dT = 1.0f / 10.0f;
int frameRate = (int)(dT * 1000.0f);
float dS = -(float)(2 * Math.PI) / 60;
float dM = -(float)(2 * Math.PI) / (60 * 60);
float dH = -(float)(2 * Math.PI) / (60 * 60 * 12);
float dHH = -(float)(2 * Math.PI) / 12;
int hh = DateTime.Now.Hour;
if (hh > 12)
{
hh -= 12;
}
int mm = DateTime.Now.Minute;
int ss = DateTime.Now.Second;
secondHand.rotate(ss * dS);
minuteHand.rotate(mm * dS + ss * dM);
hourHand.rotate(hh * dHH + (mm * ss) * dH);
bool dir = true;
while (mDrawing)
{
mGraphics.Clear(SystemColors.Control);
drawPolygon(outerBox);
drawPolygon(innerBox);
drawCircle(clockFace);
drawPoint(clockFace.getCenter());
fillPolygon(hourHand);
fillPolygon(minuteHand);
fillPolygon(secondHand);
mGraphics.SetClip(innerBoxBound);
fillPolygon(pendulum);
mGraphics.ResetClip();
for (int k = 0; k < 12; k++)
{
drawString(strs[k]);
}
secondHand.rotate(dS * dT);
minuteHand.rotate(dM * dT);
hourHand.rotate(dH * dT);
angularVelocity += angularAcceleration * dT;
theta += angularVelocity * dT * pendConst;
pendulum.rotate(angularVelocity * dT * pendConst);
angularAcceleration = -(gravity / 200.0f) * (float)Math.Sin(theta);
Console.WriteLine(angularAcceleration + " " + angularVelocity + " " + theta);
Thread.Sleep(frameRate);
}
}
