dataplot_set_colormap

Description

Set Colormap for a contour plot or any plot that supports a colormap

Syntax

int dataplot_set_colormap( DataPlot & dp, const vector<double> & vZLevels, const vector<uint> & vnFillColors, uint ncAbove = SYSCOLOR_GRAY, uint ncBelow = SYSCOLOR_BLACK, int nModifyContourLines = -1, int nLogScale = -1, const vector<uint> & vnLineColors = NULL, const vector<uint> & vnLineStyles = NULL, const vector<double> & vLineThickness = NULL )

Parameters

dp

[input] the data plot to set colormap

vZLevels

[input] Z range levels.

vnFillColors

[input] Z level corresponding colors. First color is used between first and second levels, and so on. So must follow vnColors.GetSize() = vLevels.GetSize() - 1.

ncAbove

[input] color to be used above the last level in vzLevels

ncBelow

[input] color to be used below vzLevels

nModifyContourLines

[input] 1 means set contour line, 0 for not, -1 means no change as default

nLogScale

[input] 1 means Logarithmic, 0 for linear, -1 means no change as default

vnLineColors

[input] Z level corresponding contour line colors, the vector size should follow vnLineColors.GetSize() = vLevels.GetSize() - 1

vnLineStyles

[input] Z level corresponding contour line styles, the vector size should follow vnLineStyles.GetSize() = vLevels.GetSize() - 1

vLineThickness

[input] Z level corresponding contour line thickness, the vector size should follow vnLineThickness.GetSize() = vLevels.GetSize() - 1

Return

return 0 for success, otherwise return -1 if dp invalid, or -3 if dp does not support colormap, or -2 if vzLevels and vnColors are not proper size, or -4 if SetColormap call failed for unknown reasons.

Examples

EX1

// set fill color with Z range levels
//For this example to run, an active graph layer with at least one dataplot must exist in the project
void dataplot_set_colormap_ex1()
{
    GraphLayer gl = Project.ActiveLayer();
    DataPlot dp = gl.DataPlots(0);
    
    if(dp)
    {
        vector  vLevels = {-3, 0, 3};
        vector<uint>    vnColors = {SYSCOLOR_GREEN, SYSCOLOR_BLUE};
        if( 0 != dataplot_set_colormap(dp, vLevels, vnColors) )
            out_str("Fail to set colormap");
    }
}

EX2

// set fill color and lines with Z range levels
//For this example to run, an active graph layer with at least one dataplot must exist in the project
void dataplot_set_colormap_ex2()
{
    GraphLayer gl = Project.ActiveLayer();
    DataPlot dp = gl.DataPlots(0);
    if(!dp)
        return;    
    
    vector      vLevels;    
    BOOL   bLogScale = false;
    dp.GetColormap(vLevels, bLogScale);
    
    // change the number of Z levels to 5
    double dMin = vLevels[0];
    double dMax = vLevels[vLevels.GetSize()-1];
    int     nNewSteps = 5;
    vLevels.Data(dMin, dMax, (dMax - dMin)/(nNewSteps-1));    
    
    vector<uint>        vnFillColors = {SYSCOLOR_GREEN, SYSCOLOR_BLUE, SYSCOLOR_CYAN, SYSCOLOR_MAGENTA};    
    vector<uint>        vnLineColors = {SYSCOLOR_YELLOW, SYSCOLOR_DKYELLOW, SYSCOLOR_NAVY, SYSCOLOR_PURPLE};
    
    // line styles
    vector<uint> vnStyles(vnLineColors.GetSize());
    vnStyles = 2; // Dot
    
    // line thickness
    vector vThickness(vnLineColors.GetSize());    
    vThickness = 2.0; 
    
    if( 0 != dataplot_set_colormap(dp, vLevels, vnFillColors, SYSCOLOR_GRAY, SYSCOLOR_BLACK, -1, -1, vnLineColors, vnStyles, vThickness) )
        out_str("Fail to setup colormap");
}

Remark

See Also

set_contour_lines

header to Include

origin.h

Reference