12750094_week03

//week03_01_P3D_translate_rotateY_radians
void setup()
{
  size(400,400,P3D);//開啟3D模式
}

void draw()
{
  background(128);//灰色背景
  translate(mouseX,mouseY);
  rotateY(radians(frameCount));//對Y旋轉
  box(200);//大小200的盒子
  
}

//week03_02_2D_point_line_rect_ellipse
size(400,400);//2D座標系統
stroke(255,0,0);//筆觸是紅色
strokeWeight(8);//筆觸權重大小
point(200,200);//預設的點，只有1pixel
line(200,0,400,100);//畫線
rect(50,50,100,100);//四邊形x,y,w,h

fill(255,255,0);
ellipse(300,200,50,80);//橢圓x,y,w,h

week03_03_rect_corner
size(400,400);
rect(50,50,100,100);
rect(50,200,100,100,20);
rect(200,50,100,100,10,20,30,40);

//week03_04_mousePressed_stroke_line
void setup()
{
  size(500,500);
}

void draw()
{
  //background(255);
  fill(255,0,0);//紅色
  rect(0,0,50,50);
  fill(255,255,0);//黃色
  rect(0,50,50,50);
  fill(0,255,0);//綠色
  rect(0,100,50,50);
  fill(0,0,255);//藍色
  rect(0,150,50,50);
  if(mousePressed)line(mouseX,mouseY,pmouseX,pmouseY);
}
void mousePressed()
{
  if(mouseX<50)
  {
    if(mouseY<50) stroke(255,0,0);
    else if(mouseY<100) stroke(255,255,0);
    else if(mouseY<150) stroke(0,255,0);
    else if(mouseY<200) stroke(0,0,255);
  }
}

//week03_04b_mousePressed_stroke_line
void setup()
{
  size(500,500);
}

void draw()
{
  //background(255);
  stroke(0);
  fill(255,0,0);//紅色
  rect(0,0,50,50);
  fill(255,255,0);//黃色
  rect(0,50,50,50);
  fill(0,255,0);//綠色
  rect(0,100,50,50);
  fill(0,0,255);//藍色
  rect(0,150,50,50);
  stroke(myStroke);
  if(mousePressed)line(mouseX,mouseY,pmouseX,pmouseY);
}
color myStroke;
void mousePressed()
{
  if(mouseX<50)
  {
    if(mouseY<50) myStroke=color(255,0,0);
    else if(mouseY<100) myStroke=color(255,255,0);
    else if(mouseY<150) myStroke=color(0,255,0);
    else if(mouseY<200) myStroke=color(0,0,255);
  }
}

//week03_05_mouse_cat_x_y
void setup()
{
  size(400,400);
}
float x,y;//貓的座標
void draw()
{
  background(255);
  ellipse(x,y,40,40);
  ellipse(mouseX,mouseY,40,20);
  x=(x*14+mouseX)/15;
  y=(y*14+mouseY)/15;
}//新的座標是舊的座標*14,目標*1

//week03_06_lerp_frameCount
void setup()
{
  size(400,400);
}
float startX=10,startY=10;
float stopX=390,stopY=290;
void draw()
{

  ellipse(startX,startY,10,10);
  ellipse(stopX,stopY,10,10);
  //lerp()可以做內差,要給他0.0~1.0之間的數
  float midX = lerp(startX,stopX,frameCount/200.0);
  float midY = lerp(startY,stopY,frameCount/200.0);
  //frameCount是第幾個frame 1秒=60frame
  ellipse(midX,midY,10,10);
}
//week03_06b_lerp_frameCount
void setup()
{
  size(400,400);
}
float startX=10,startY=10;
float stopX=390,stopY=290;
void draw()
{
  background(255);//清除殘影
  ellipse(startX,startY,10,10);
  ellipse(stopX,stopY,10,10);
  //lerp()可以做內差,要給他0.0~1.0之間的數
  float midX = lerp(startX,stopX,frameCount/200.0);
  float midY = lerp(startY,stopY,frameCount/200.0);
  //frameCount是第幾個frame 1秒=60frame
  ellipse(midX,midY,10,10);
}

//week03_07_bezier_curve
size(400,400);
int x1=340,x2=40,x3=360,x4=60;
int y1=80,y2=40,y3=360,y4=320;
line(x1,y1,x2,y2);
line(x3,y3,x4,y4);
bezier(x1,y1,x2,y2,x3,y3,x4,y4);//貝氏曲線
//week03_08_bezier_equation
void setup()
{ 
  size(400,400);
}  
int x1=340,x2=40,x3=360,x4=60;
int y1=80,y2=40,y3=360,y4=320;
void draw()
{
  background(255);
  line(x1,y1,x2,y2);
  line(x3,y3,x4,y4);
  bezier(x1,y1,x2,y2,x3,y3,x4,y4);//貝氏曲線
  float t=frameCount/200.0%1;
  float t2 = 1-t;
  float x=x1*t2*t2*t2 +3*x2*t*t2*t2+3*x3*t*t*t2+x4*t*t*t;
  float y=y1*t2*t2*t2 +3*y2*t*t2*t2+3*y3*t*t*t2+y4*t*t*t;
  ellipse(x,y,10,10);
}

//week03_08b_bezier_equation
void setup()
{ 
  size(400,400);
}  
int x1=120,x2=320,x3=320,x4=120;//只改控制點的座標
int y1=80,y2=20,y3=300,y4=300;
void draw()
{
  background(255);
  line(x1,y1,x2,y2);

  line(x3,y3,x4,y4);
  bezier(x1,y1,x2,y2,x3,y3,x4,y4);//貝氏曲線
  float t=frameCount/200.0%1;
  float t2 = 1-t;
  float x=x1*t2*t2*t2 +3*x2*t*t2*t2+3*x3*t*t*t2+x4*t*t*t;
  float y=y1*t2*t2*t2 +3*y2*t*t2*t2+3*y3*t*t*t2+y4*t*t*t;
  ellipse(x,y,10,10);
}

//week03_09_3D_rendom_random_point
float []x=new float[1000];
float []y=new float[1000];
void setup()
{
  size(400,400,P3D);//開啟3D模式
  for(int i=0;i<1000;i++)
  {
    x[i]=random(400);
    y[i]=random(400);
  }
}

void draw()
{
  background(0);//黑色背景
  stroke(255);//白色線條
  for(int i=0;i<1000;i++)
  {
    point(x[i],y[i]);
  }
  
}

//week03_10_3D_rendom_rendom_random_point_translate
float []x=new float[5000];
float []y=new float[5000];
float []z=new float[5000];
void setup()
{
  size(400,400,P3D);//開啟3D模式
  for(int i=0;i<5000;i++)
  {
    x[i]=random(400);
    y[i]=random(400);
    z[i]=random(400);
  }
}

void draw()
{
  background(0);//黑色背景
  stroke(255);//白色線條
  translate(0,0,mouseY);
  for(int i=0;i<5000;i++)
  {
    point(x[i],y[i],z[i]);
  }
  
}

滑鼠拉近星星位置會拉近

//week03_11_3D_sphere_translate_rotateY
void setup()
{
  size(400,400,P3D);
}
void draw()
{
  background(128);//灰色背景
  translate(mouseX,mouseY);
  rotateY(radians(frameCount));//對Y旋轉
  sphere(200);
}
//week03_12_3D_sphere_translate_rotateY_lights
void setup()
{
  size(400,400,P3D);
}
void draw()
{
  background(128);//灰色背景
  lights();//加上打光
  translate(mouseX,mouseY);
  rotateY(radians(frameCount));//對Y旋轉
  sphere(200);
}

//week03_13_3D_pushMatrix_translate_sphere_popMatrix
void setup()
{
  size(600,400,P3D);
}
void draw()
{
  background(128);//灰色背景
  lights();//加上打光
  pushMatrix();//備份矩陣
    translate(300,100);//習慣上要縮排
    sphere(100);
  popMatrix();//還原矩陣
  //備份、還原後就不會出錯
  pushMatrix();
    translate(100,100);
    sphere(100);
  popMatrix();
}