require("chartdirector")
class SurfaceController < ApplicationController
def index()
@title = "Surface Chart (1)"
@ctrl_file = File.expand_path(__FILE__)
@noOfCharts = 1
render :template => "templates/chartview"
end
#
# Render and deliver the chart
#
def getchart()
# The x and y coordinates of the grid
dataX = [-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
dataY = [-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
# The values at the grid points. In this example, we will compute the values using the
# formula z = x * sin(y) + y * sin(x).
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] = x * Math.sin(y) + y * Math.sin(x)
end
end
# Create a SurfaceChart object of size 720 x 600 pixels
c = ChartDirector::SurfaceChart.new(720, 600)
# Add a title to the chart using 20 points Times New Roman Italic font
c.addTitle("Surface Energy Density ", "timesi.ttf", 20)
# Set the center of the plot region at (350, 280), and set width x depth x height to 360 x
# 360 x 270 pixels
c.setPlotRegion(350, 280, 360, 360, 270)
# Set the data to use to plot the chart
c.setData(dataX, dataY, dataZ)
# Spline interpolate data to a 80 x 80 grid for a smooth surface
c.setInterpolation(80, 80)
# Add a color axis (the legend) in which the left center is anchored at (645, 270). Set the
# length to 200 pixels and the labels on the right side.
c.setColorAxis(645, 270, ChartDirector::Left, 200, ChartDirector::Right)
# Set the x, y and z axis titles using 10 points Arial Bold font
c.xAxis().setTitle("X (nm)", "arialbd.ttf", 10)
c.yAxis().setTitle("Y (nm)", "arialbd.ttf", 10)
c.zAxis().setTitle("Energy Density (J/m<*font,super*>2<*/font*>)", "arialbd.ttf", 10)
# Output the chart
send_data(c.makeChart2(ChartDirector::JPG), :type => "image/jpeg", :disposition => "inline")
end
end |