1124 許君平 上課筆記

11/24

1.互動餐桌Le Petit Chef

*實作:互動餐桌-可移動餐盤

*實作:互動餐桌-移動餐盤.按任意鍵旋轉

程式碼

PVector [] dish=new PVector[4];
float [] r={0,0,0,0};
float [] angle={0,0,0,0};
void setup(){
  size(640,480);
  dish[0]=new PVector(100,100);
  dish[1]=new PVector(540,100);
  dish[2]=new PVector(100,380);
  dish[3]=new PVector(540,380);
}
void draw(){
  background(255);
  ellipse(320,240,400,400);
  ellipse(100,100,100,100);
  ellipse(540,100,100,100);
  ellipse(100,380,100,100);
  ellipse(540,380,100,100);
  for(int i=0;i<4;i++){
    ellipse(dish[i].x, dish[i].y, 90,90);
    line(dish[i].x,dish[i].y,320,240);
  }
  if(keyPressed){
    for(int i=0;i<4;i++){
      angle[i]-=0.01;
      dish[i].x=r[i]*cos(angle[i])+320;
      dish[i].y=r[i]*sin(angle[i])+240;
    }
  }
}
int nowDish=-1;
void mousePressed(){
  for(int i=0;i<4;i++){
    if(dist(dish[i].x,dish[i].y,mouseX,mouseY)<45){
      nowDish=i;
    }
  }
}
void mouseDragged(){
  if(nowDish!=-1){
    dish[nowDish].x=mouseX;
    dish[nowDish].y=mouseY;
    r[nowDish]=sqrt((mouseX-320)*(mouseX-320)+(mouseY-240)*(mouseY-240));
    angle[nowDish]=atan2(mouseY-240,mouseX-320);
  }
}
void mouseReleased(){
  nowDish=-1;
}

2.路邊停車

*實作:上下鍵車子前進後退,左右鍵車子左轉右轉

程式碼
void setup(){
size(640, 480, P3D);
rectMode(CENTER);
}
float carX=640/2, carY=320/2;
float carDir=0.6, carWheel=0;
void drawCar(){
translate(carX, carY);
rotateZ(carDir);
rect(0,0,187,89);
if(keyPressed && keyCode==UP){
carX+= cos(carDir); carY+=sin(carDir);
}else if(keyPressed && keyCode==DOWN){
carX-= cos(carDir); carY-=sin(carDir);
}else if(keyPressed && keyCode==RIGHT){
carDir+=0.01;
}else if(keyPressed && keyCode==LEFT){
carDir-=0.01;
}
}
void draw(){
background(100);
drawCar();
}

*實作:加上車輪,上下鍵車子前進後退,左右鍵前輪左轉右轉

程式碼
void setup(){
size(640, 480, P3D);
rectMode(CENTER);
}
float carX=640/2, carY=320/2;
float carDir=0, carWheel=0;
void drawCar(){
pushMatrix();
translate(carX, carY);
rotateZ(carDir);
rect(0,0,187,89);
drawWheel(127/2, 89/2, 1);
drawWheel(127/2, -89/2, 1);
drawWheel(-127/2, 89/2, 0);
drawWheel(-127/2,-89/2, 0);

if(keyPressed && keyCode==UP){
carX+= cos(carDir+carWheel); carY+=sin(carDir+carWheel);
carDir+=carWheel/50;
}else if(keyPressed && keyCode==DOWN){
carX-= cos(carDir+carWheel); carY-=sin(carDir+carWheel);
carDir-=carWheel/50;
}else if(keyPressed && keyCode==RIGHT){
carWheel+=0.01;
if(carWheel > 0.3) carWheel=0.3;
}else if(keyPressed && keyCode==LEFT){
carWheel-=0.01;
if(carWheel < -0.3) carWheel=-0.3;
}
popMatrix();
}
void drawWheel(float x, float y, int front){
pushMatrix();
translate(x,y);
if(front==1) rotateZ(carWheel);
rect(0,0, 40,20);
popMatrix();
}
void draw(){
background(100);
drawCar();
}

*實作:加上車位,就可以練習停車囉!