//Computes the graph area based on the scale bar definition
public int ComputeScaleTransformation(CoordSettings coordSettings, NuGenPointSet pointSet)
{
double[][] r_graph = { new double[3], new double[3], new double[3] };
double[,] r_screen = new double[3, 3];
List <NuGenPoint> points = pointSet.Points;
scalePointCount = 0;
validScale = false;
foreach (NuGenPoint point in points)
{
if (scalePointCount == 2)
{
throw new InvalidOperationException("Can not define more scale bar points");
}
if (point.GraphCoordsAreDefined())
{
double xGraph, yGraph;
ConvertToCartesian(NuGenMath.mmUnitize(coordSettings), point.XThetaGraph, point.YRGraph,
out xGraph, out yGraph);
r_graph[0][scalePointCount] = xGraph;
r_graph[1][scalePointCount] = yGraph;
r_graph[2][scalePointCount] = 1.0;
r_screen[0, scalePointCount] = point.XScreen;
r_screen[1, scalePointCount] = point.YScreen;
r_screen[2, scalePointCount] = 1.0;
scalePointCount++;
}
}
if (scalePointCount == 2)
{
// create virtual third point along a virtual axis which is just orthogonal to the virtual
// axis between the other two points. assumes all points are in same z-value (which is 1.0) plane
double[] axis1 = new double[3];
double[] axis2 = new double[3];
double[] z = { 0.0, 0.0, 1.0 };
axis1[0] = r_graph[0][1] - r_graph[0][0];
axis1[1] = r_graph[1][1] - r_graph[1][0];
axis1[2] = r_graph[2][1] - r_graph[2][0];
NuGenMath.VectorCrossProduct(z, axis1, axis2);
r_graph[0][2] = r_graph[0][0] + axis2[0];
r_graph[1][2] = r_graph[1][0] + axis2[1];
r_graph[2][2] = 1.0;
axis1[0] = r_screen[0, 1] - r_screen[0, 0];
axis1[1] = r_screen[1, 1] - r_screen[1, 0];
axis1[2] = r_screen[2, 1] - r_screen[2, 0];
NuGenMath.VectorCrossProduct(z, axis1, axis2);
r_screen[0, 2] = r_screen[0, 0] + axis2[0];
r_screen[1, 2] = r_screen[1, 0] + axis2[1];
r_screen[2, 2] = 1.0;
int rtnS2G = NuGenMath.ScreenToGraph(r_graph, r_screen,
screenToGraph, graphToScreen);
// log to linear transformation is not allowed when using scale bar since it would
// be such an extremely rare special case that its benefit would be minimal, especially
// since it would only confuse the majority of users who would not be expecting it
validScale = (rtnS2G == NuGenMath.SUCCESS);
switch (rtnS2G)
{
case NuGenMath.SUCCESS:
return(NuGenMath.SUCCESS);
case NuGenMath.BAD_GRAPH_COORDINATES:
return(NuGenMath.BAD_GRAPH_COORDINATES);
case NuGenMath.BAD_SCREEN_COORDINATES:
return(NuGenMath.BAD_SCREEN_COORDINATES);
}
}
return(NuGenMath.SUCCESS);
}
//Computes the graph area based on the defined axis points, returns a value corresponding
// to the result of the calculation
public int ComputeAxesTransformation(CoordSettings coordSettings, NuGenPointSet pointSet)
{
double[][] r_graph = { new double[3], new double[3], new double[3] };
double[,] r_screen = new double[3, 3];
List <NuGenPoint> points = pointSet.Points;
axisPointCount = 0;
validAxes = false;
foreach (NuGenPoint p in points)
{
if (axisPointCount == 3)
{
throw new InvalidOperationException("We have three axis points, can not compute more");
}
if (p.GraphCoordsAreDefined())
{
double xGraph, yGraph;
ConvertToCartesian(NuGenMath.mmUnitize(coordSettings), p.XThetaGraph, p.YRGraph, out xGraph, out yGraph);
r_graph[0][axisPointCount] = xGraph;
r_graph[1][axisPointCount] = yGraph;
r_graph[2][axisPointCount] = 1.0;
r_screen[0, axisPointCount] = p.XScreen;
r_screen[1, axisPointCount] = p.YScreen;
r_screen[2, axisPointCount] = 1.0;
axisPointCount++;
}
}
if (axisPointCount == 3)
{
AdjustMidValuedLogCoords(coordSettings, r_graph);
int rtnS2G = NuGenMath.ScreenToGraph(r_graph, r_screen, screenToGraph, graphToScreen);
validAxes = false;
if (rtnS2G == NuGenMath.SUCCESS)
{
int rtnL2L = ComputeLogToFromLinear(coordSettings, r_graph);
switch (rtnL2L)
{
case NuGenMath.SUCCESS:
break;
case NuGenMath.NONPOSITIVE_COORDINATE:
return(NuGenMath.NONPOSITIVE_COORDINATE);
case NuGenMath.NO_SPREAD:
return(NuGenMath.NO_SPREAD);
}
}
validAxes = (rtnS2G == NuGenMath.SUCCESS);
switch (rtnS2G)
{
case NuGenMath.SUCCESS:
return(NuGenMath.SUCCESS);
case NuGenMath.BAD_GRAPH_COORDINATES:
return(NuGenMath.BAD_GRAPH_COORDINATES);
case NuGenMath.BAD_SCREEN_COORDINATES:
return(NuGenMath.BAD_SCREEN_COORDINATES);
}
}
return(NuGenMath.SUCCESS);
}