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Calculator.java
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Calculator.java
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public class Calculator {
static double DrawX = 0, DrawY = 0;
static double CalculatePositionX(double[] ViewFrom, double[] ViewTo, double x, double y, double z)
{
setStuff(ViewFrom, ViewTo, x, y, z);
return DrawX;
}
static double CalculatePositionY(double[] ViewFrom, double[] ViewTo, double x, double y, double z)
{
setStuff(ViewFrom, ViewTo, x, y, z);
return DrawY;
}
static void setStuff(double[] ViewFrom, double[] ViewTo, double x, double y, double z)
{
Vector ViewVector = new Vector(ViewTo[0] - ViewFrom[0], ViewTo[1] - ViewFrom[1], ViewTo[2] - ViewFrom[2]);
Vector DirectionVector = new Vector(1, 1, 1);
Vector PlaneVector1 = ViewVector.CrossProduct(DirectionVector);
Vector PlaneVector2 = ViewVector.CrossProduct(PlaneVector1);
Vector ViewToPoint = new Vector(x - ViewFrom[0], y - ViewFrom[1], z - ViewFrom[2]);
double t = (ViewVector.x * ViewTo[0] + ViewVector.y*ViewTo[1] + ViewVector.z*ViewTo[2]
- (ViewVector.x * ViewFrom[0] + ViewVector.y*ViewFrom[1] + ViewVector.z*ViewFrom[2]))
/ (ViewVector.x * ViewToPoint.x + ViewVector.y*ViewToPoint.y + ViewVector.z*ViewToPoint.z);
x = ViewFrom[0] + ViewToPoint.x * t;
y = ViewFrom[1] + ViewToPoint.y * t;
z = ViewFrom[2] + ViewToPoint.z * t;
if(t > 0)
{
DrawX = PlaneVector2.x * x + PlaneVector2.y * y + PlaneVector2.z * z;
DrawY = PlaneVector1.x * x + PlaneVector1.y * y + PlaneVector1.z * z;
}
}
}