//Converts a pair of screen coordinates to graph coordinates
private void ScreenToGraph(double xScreen, double yScreen, out double xGraph, out double yGraph)
{
double[] rScreen = new double[3];
double[] rGraph = new double[3];
rScreen[0] = xScreen;
rScreen[1] = yScreen;
rScreen[2] = 1.0;
NuGenMath.MatrixMultiply3x1(rGraph, screenToGraph, rScreen);
xGraph = rGraph[0];
yGraph = rGraph[1];
}
//Converts a pair of graph coordinates to screen coordinates
private void GraphToScreen(double xGraph, double yGraph, out double xScreen, out double yScreen)
{
if (!(ValidAxes || ValidScale))
{
throw new InvalidOperationException("No valid axes or scale");
}
double[] rScreen = new double[3];
double[] rGraph = new double[3];
rGraph[0] = xGraph;
rGraph[1] = yGraph;
rGraph[2] = 1.0;
NuGenMath.MatrixMultiply3x1(rScreen, graphToScreen, rGraph);
xScreen = rScreen[0];
yScreen = rScreen[1];
}
public static void Test()
{
double[,] r_screen = new double[3, 3];
double[][] r_graph = { new double[3], new double[3], new double[3] };
r_screen[0, 0] = 69;
r_screen[1, 0] = 68;
r_screen[2, 0] = 626;
r_screen[0, 1] = 577;
r_screen[1, 1] = 84;
r_screen[2, 1] = 576;
r_screen[0, 2] = 1;
r_screen[1, 2] = 1;
r_screen[2, 2] = 1;
r_graph[0][0] = 0;
r_graph[1][0] = 0;
r_graph[2][0] = 30;
r_graph[0][1] = -1;
r_graph[1][1] = 1;
r_graph[2][1] = -1;
r_graph[0][2] = 1;
r_graph[1][2] = 1;
r_graph[2][2] = 1;
double[,] s2g = new double[3, 3];
double[,] g2s = new double[3, 3];
ScreenToGraph(r_graph, r_screen, s2g, g2s);
double[] rScreen = new double[3];
double[] rGraph = new double[3];
rScreen[0] = 300;
rScreen[1] = 300;
rScreen[2] = 1.0;
NuGenMath.MatrixMultiply3x1(rGraph, s2g, rScreen);
double xGraph = rGraph[0];
double yGraph = rGraph[1];
}