week03

01.Java程式:立方體:

void setup(){

size(400,400,P3D);

}

void draw(){

  background(128);

  translate(mouseX,mouseY);

  rotateY(radians(frameCount));

  box(200);

}

02.Java程式:2D坐標系:

size(400,400);

stroke(255,0,0);

strokeWeight(8);

point(200,200);

line(200,0,400,100);

rect(50,50,100,100);

fill(255,255,0);

ellipse(300,200,50,80);

03.Java程式:各種矩形:

size(400,400);

rect(50,50,100,100);

rect(50,200,100,100,20);

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

04.Java程式:畫筆換顏色:

void setup() {

  size(400, 400);

}

void draw() {

  fill(255,0,0);

  rect(0, 0, 50, 50);

  fill(255,255,0);

  rect(0, 50, 50, 50);

  fill(0,255,0);

  rect(0, 100, 50, 50);

  fill(0,0,255);

  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);

  }

}

04.Java程式:向量移動:

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);

float midX = lerp(startX, stopX,frameCount / 200.0);

float midY = lerp(startY, stopY,frameCount / 200.0);

ellipse(midX,midY,10,10);

}

05.Java程式:費氏函數向量移動:

void setup() {

  size(400, 400);

}

void draw() {

  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);

  float t = frameCount / 200.0;

  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);

}

06.Java程式:立體星空:

float []x=new float[5000];

float []y=new float[5000];

float []z=new float[5000];

void setup() {

  size(400, 400, P3D);

  for (int i=0; i<1000; i++) {

    x[i]=random(400);

    y[i]=random(400);

    z[i]=random(-400,400);

  }

}

void draw(){

background(0);

stroke(255);

translate(0,0,mouseY);

for(int i=0;i<5000;i++){

  point(x[i],y[i],z[i]);

}

}

07.Java程式:立體球:

void setup(){

  size(400,400,P3D);

}

void draw(){

  background(128);

  lights();

  translate(mouseX,mouseY);

  rotateY(radians(frameCount));

  sphere(200);

}

08.Java程式:立體球+矩陣:

void setup() {

  size(400, 400, P3D);

}

void draw() {

  background(128);

  lights();

  pushMatrix();

    translate(100,100);

    rotateY(radians(frameCount));

    sphere(100);

  popMatrix();

  pushMatrix();

    translate(300, 100);

    rotateY(radians(frameCount));

    sphere(100);