...
Create a new program where a simple car follows the mouse on the screen from left to right. The car should be drawn from the side, and include wheels that rotate. You may use the example code to get started.
...
| Code Block | ||
|---|---|---|
| ||
int rotation;
void setup()
{
size(900, 400); // def. window size
}
void draw()
{
rotation++;
}
void car(int x, int y) {
fill(100);
beginShape();
vertex(0, 0);
vertex(5, -50);
vertex(50, -50);
vertex(70, -80);
vertex(150, -80);
vertex(190, -50);
vertex(265, -45);
vertex(270, 0);
vertex(0, 0);
endShape();
wheel(60, 0);
wheel(210, 0);
}
void wheel(int x, int y) {
int radius = 25;
fill(150);
stroke(0);
strokeWeight(7);
ellipse(0, 0, radius*2, radius*2);
strokeWeight(4);
line(0-radius, 0, 0+radius, 0);
line (0, 0-radius, 0, 0+radius);
noStroke();
}
|
Possible Solution:
| Code Block | ||||||
|---|---|---|---|---|---|---|
| ||||||
int rotation; boolean forward = true; int xScale = 1; void setup() { size(900, 400); } void draw() { background(255); int mouseMovement = mouseX-pmouseX; //pmousex gives us our mouse x value from the last frame. Subtracting from the current position give us the distance moved per frame if (mouseMovement<0) { // if the movement is negative, then we flip everthing backwards with a negative xcale xScale = -1; } if (mouseMovement>0) { // if the movement is positive, then our xscale is positive xScale = 1; } rotation+= abs(mouseMovement); car(mouseX, height/2); } void car(int x, int y) { pushMatrix(); translate(x, y); scale(xScale, 1); fill(100); beginShape(); vertex(0, 0); vertex(5, -50); vertex(50, -50); vertex(70, -80); vertex(150, -80); vertex(190, -50); vertex(265, -45); vertex(270, 0); vertex(0, 0); endShape(); wheel(60, 0); wheel(210, 0); popMatrix(); } void wheel(int x, int y) { int radius = 25; fill(0, 100, 0(150); stroke(0); pushMatrix(); translate(x, y); stroke(0rotate(radians(rotation)); strokeWeight(7); ellipse(0, 0, radius*2, radius*2); strokeWeight(4); line(0-radius, 0, 0+radius, 0); line (0, 0-radius, 0, 0+radius); noStroke(); popMatrix(); } |