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RoboBlockly for Learning Math and Coding

CSP Unit 3 Lesson 9.7

Piano
Linkbot Image Mindstorm Image
0x36302418126y36302418126
Grid:
Tics Lines:
Width px
Hash Lines:
Width px
Labels:
Font px
Trace Lines:
Robot 1:
Width px
Robot 2:
Width px
Robot 3:
Width px
Robot 4:
Width px
Labels: x-axis y-axis Show Grid
Grid: 12x12 inches 24x24 inches 36x36 inches
72x72 inches 96x96 inches 192x192 inches
Quad: 4 Quadrants 1 Quadrant 1&4 Quadrants
Units: US Customary Metric
Background: Background Image

Robot 1

0
S
M
L
Initial Position:
( in, in)
Initial Angle:
deg
Current Position: (0 in, 0 in)
Current Angle: 90 deg
Wheel Radius:
Track Width:
in

Robot 2

0
S
M
L
Initial Position:
( in, in)
Initial Angle:
deg
Current Position: (6 in, 0 in)
Current Angle: 90 deg
Wheel Radius:
Track Width:
in

Robot 3

0
S
M
L
Initial Position:
( in, in)
Initial Angle:
deg
Current Position: (12 in, 0 in)
Current Angle: 90 deg
Wheel Radius:
Track Width:
in

Robot 4

0
S
M
L
Initial Position:
( in, in)
Initial Angle:
deg
Current Position: (18 in, 0 in)
Current Angle: 90 deg
Wheel Radius:
Track Width:
in
CSP Unit 3 Lesson 9.7
/* Code generated by RoboBlockly v2.5 */
/* Problem Statement: 
    The pre-placed code uses a repeat loop to draw circles of
    random colors at random locations with a random radius of
    1, 2, or 3 units (and opacity = 50%), on a white
    background, and then a second loop to draw white circles
    (opacity = 50%). Experiment with the number of iterations
    to see how many it takes for the white circles to "erase"
    the colored circles. Does it make a difference if you
    change the opacity to 100% for the white circles? Compare
    your answer with your neighbor's. (Because of the
    randomness, it will be a little different each time you run
    the code.)
    */
#include <chplot.h>
CPlot plot;

int count;
int count2;

// Random circles on white background, 50% opacity
plot.backgroundColor("white");
plot.grid(PLOT_OFF);
plot.noStrokeColor();
plot.fillOpacity(0.5);
count = 0;
while(count < 700) {
  // Random color & location, rand. radius = 1, 2, or 3
  plot.fillColor(randcolor());
  plot.circle(randint(0, 36), randint(0, 36), randint(1, 3));
  // Delay slightly after each circle for visual effect
  delaySeconds(0.01);
  count = count + 1;
}
// Switch to drawing white circles at 50% opacity
plot.fillOpacity(0.5);
count2 = 0;
while(count2 < 1000) {
  // Random color & location, rand. radius = 1, 2, or 3
  plot.fillColor("white");
  plot.circle(randint(0, 36), randint(0, 36), randint(1, 3));
  // Delay slightly after each circle for visual effect
  delaySeconds(0.01);
  count2 = count2 + 1;
}

plot.label(PLOT_AXIS_XY, "");
plot.grid(PLOT_OFF);
plot.tics(PLOT_AXIS_XY, PLOT_OFF);
plot.axis(PLOT_AXIS_XY, PLOT_OFF);
plot.axisRange(PLOT_AXIS_XY, 0, 36);
plot.ticsRange(PLOT_AXIS_XY, 6);
plot.sizeRatio(1);
plot.plotting();
Load Blocks
Hardware
LArduino
Workspace Show Ch Save File
Problem Statement:

The pre-placed code uses a repeat loop to draw the random colored circles, as in the previous lesson. It then adds a second loop to draw white circles (opacity = 50%). Experiment with the number of iterations to see how many it takes for the white circles to "erase" the colored circles. Does it make a difference if you change the opacity to 100% for the white circles? Compare your results with your neighbor's.


		
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