ChartDirector 6.0 (Ruby Edition)
Contour Interpolation
Source Code Listing
require("chartdirector") class ContourinterpolateController < ApplicationController def index() @title = "Contour Interpolation" @ctrl_file = File.expand_path(__FILE__) @noOfCharts = 4 render :template => "templates/chartview" end # # Render and deliver the chart # def getchart() # This script can draw different charts depending on the chartIndex chartIndex = (params["img"]).to_i # The x and y coordinates of the grid dataX = [-4, -3, -2, -1, 0, 1, 2, 3, 4] dataY = [-4, -3, -2, -1, 0, 1, 2, 3, 4] # The values at the grid points. In this example, we will compute the values using the # formula z = Sin(x * pi / 3) * Sin(y * pi / 3). dataZ = Array.new(dataX.length * dataY.length, 0) 0.upto(dataY.length - 1) do |yIndex| y = dataY[yIndex] 0.upto(dataX.length - 1) do |xIndex| x = dataX[xIndex] dataZ[yIndex * dataX.length + xIndex] = Math.sin(x * 3.1416 / 3) * Math.sin( y * 3.1416 / 3) end end # Create a XYChart object of size 360 x 360 pixels c = ChartDirector::XYChart.new(360, 360) # Set the plotarea at (30, 25) and of size 300 x 300 pixels. Use semi-transparent black # (c0000000) for both horizontal and vertical grid lines c.setPlotArea(30, 25, 300, 300, -1, -1, -1, 0xc0000000, -1) # Add a contour layer using the given data layer = c.addContourLayer(dataX, dataY, dataZ) # Set the x-axis and y-axis scale c.xAxis().setLinearScale(-4, 4, 1) c.yAxis().setLinearScale(-4, 4, 1) if chartIndex == 0 # Discrete coloring, spline surface interpolation c.addTitle("Spline Surface - Discrete Coloring", "arialbi.ttf", 12) elsif chartIndex == 1 # Discrete coloring, linear surface interpolation c.addTitle("Linear Surface - Discrete Coloring", "arialbi.ttf", 12) layer.setSmoothInterpolation(false) elsif chartIndex == 2 # Smooth coloring, spline surface interpolation c.addTitle("Spline Surface - Continuous Coloring", "arialbi.ttf", 12) layer.setContourColor(ChartDirector::Transparent) layer.colorAxis().setColorGradient(true) else # Discrete coloring, linear surface interpolation c.addTitle("Linear Surface - Continuous Coloring", "arialbi.ttf", 12) layer.setSmoothInterpolation(false) layer.setContourColor(ChartDirector::Transparent) layer.colorAxis().setColorGradient(true) end # Output the chart send_data(c.makeChart2(ChartDirector::JPG), :type => "image/jpeg", :disposition => "inline") end end |
<html> <body style="margin:5px 0px 0px 5px"> <!-- Title --> <div style="font-size:18pt; font-family:verdana; font-weight:bold"> <%= @title %> </div> <hr style="border:solid 1px #000080" /> <!-- Source Code Listing Link --> <div style="font-size:9pt; font-family:verdana; margin-bottom:1.5em"> <%= link_to "Source Code Listing", :controller => "cddemo", :action => "viewsource", :ctrl_file => @ctrl_file, :view_file => File.expand_path(__FILE__) %> </div> <!-- Create one or more IMG tags to display the demo chart(s) --> <% 0.upto(@noOfCharts - 1) do |i| %> <img src="<%= url_for(:action => "getchart", :img => i) %>"> <% end %> </body> </html> |
#!/usr/bin/env ruby require("chartdirector") def createChart(chartIndex) # The x and y coordinates of the grid dataX = [-4, -3, -2, -1, 0, 1, 2, 3, 4] dataY = [-4, -3, -2, -1, 0, 1, 2, 3, 4] # The values at the grid points. In this example, we will compute the values using the formula z # = Sin(x * pi / 3) * Sin(y * pi / 3). dataZ = Array.new(dataX.length * dataY.length, 0) 0.upto(dataY.length - 1) do |yIndex| y = dataY[yIndex] 0.upto(dataX.length - 1) do |xIndex| x = dataX[xIndex] dataZ[yIndex * dataX.length + xIndex] = Math.sin(x * 3.1416 / 3) * Math.sin( y * 3.1416 / 3) end end # Create a XYChart object of size 360 x 360 pixels c = ChartDirector::XYChart.new(360, 360) # Set the plotarea at (30, 25) and of size 300 x 300 pixels. Use semi-transparent black # (c0000000) for both horizontal and vertical grid lines c.setPlotArea(30, 25, 300, 300, -1, -1, -1, 0xc0000000, -1) # Add a contour layer using the given data layer = c.addContourLayer(dataX, dataY, dataZ) # Set the x-axis and y-axis scale c.xAxis().setLinearScale(-4, 4, 1) c.yAxis().setLinearScale(-4, 4, 1) if chartIndex == 0 # Discrete coloring, spline surface interpolation c.addTitle("Spline Surface - Discrete Coloring", "arialbi.ttf", 12) elsif chartIndex == 1 # Discrete coloring, linear surface interpolation c.addTitle("Linear Surface - Discrete Coloring", "arialbi.ttf", 12) layer.setSmoothInterpolation(false) elsif chartIndex == 2 # Smooth coloring, spline surface interpolation c.addTitle("Spline Surface - Continuous Coloring", "arialbi.ttf", 12) layer.setContourColor(ChartDirector::Transparent) layer.colorAxis().setColorGradient(true) else # Discrete coloring, linear surface interpolation c.addTitle("Linear Surface - Continuous Coloring", "arialbi.ttf", 12) layer.setSmoothInterpolation(false) layer.setContourColor(ChartDirector::Transparent) layer.colorAxis().setColorGradient(true) end # Output the chart c.makeChart("contourinterpolate%s.jpg" % chartIndex) end createChart(0) createChart(1) createChart(2) createChart(3) |