課堂練習1
試著練習做出這個(中間的綠圓圈會跟著鼠標動)
試著練習做出這個(中間的綠圓圈會跟著鼠標動)
圖中有三顆眼睛 不過我們先慢慢來 先做出一顆眼睛就好
//week04_01_atan2_dy_dx_cos_sin
void setup(){
size(600,300);
}
void draw(){
background(#C0FFEE); //咖啡粉青色
ellipse(150,150,100,100); //大眼睛
float dx=mouseX-150, dy=mouseY-150;
float a=atan2(dy,dx); //算出角度
ellipse(150+cos(a)*25,150+sin(a)*25,50,50);
}
現在做出一顆眼睛了 而且眼珠會跟著鼠標動
課堂練習2
上一個練習做出一顆眼睛了 現在試著做出第二顆
//week04_02_atan2_for_x_dy_dx_cos_sin
void setup(){
size(600,300);
}
void draw(){
background(#C0FFEE); //咖啡粉青色
for(int x=150; x<=450; x+=300){
ellipse(x,150,100,100); //大眼睛
float dx=mouseX-x, dy=mouseY-150;
float a=atan2(dy,dx); //算出角度
ellipse(x+cos(a)*25,150+sin(a)*25,50,50);
}
}
課堂練習3
稍微做個小小的練習後現在要來做本周的大魔王了
//week04_03_rotateX__radians_mouseY
void setup(){
size(400,400,P3D);
}
void draw(){
background(128);
translate(width/2,height/2);
//rotateY(radians(mouseX)); //上周的左右轉
rotateX(radians(-mouseY)); //本次練習的上下轉
box(200);
}
課堂練習4
上週練習了讓圖對Y軸轉
剛剛練習了對X軸轉
現在來練習對著Z軸轉
//week04_04_rotateZ
void setup(){
size(400,400,P3D);
}
void draw(){
background(128);
translate(width/2,height/2);
rotateZ(radians(mouseX));
ellipse(0,0,100,150);
}
課堂練習5
練習做出一個機械手臂
//week04_05_robot_arm_pushMatrix_T_R_T_box_popMatrix
void setup(){
size(400,400,P3D);
}
void draw(){
background(128);
translate(width/2,height/2);
pushMatrix();
translate(0,100);
box(50); //台座
pushMatrix();
translate(0,-25);
rotateZ(radians(mouseX));
translate(0,-50);
box(10,100,10);
popMatrix();
popMatrix();
}
課堂練習5a
我們來觀察一下旋轉的情況
//week04_05a_rotateZ_translate_box
void setup(){
size(400,400,P3D);
}
void draw(){
background(128);
translate(width/2,height/2); //移到畫面中心
//以下2行 分別註解、排列組合觀察
rotateZ(radians(frameCount)); //對Z軸旋轉
translate(0,-50); //把下端移到中心
box(10,100,10); //可轉動的長條
}
可以觀察到 如果有translate(0,-50); 那麼棒子的下端就會在中心點
如果沒有translate(0,-50); 那麼就會變成棒子的中間在中心點
課堂練習5b
//week04_05b_rotateZ_translate_box
void setup(){
size(400,400,P3D);
}
void draw(){
background(128);
//translate(width/2,height/2); //移到畫面中心
translate(mouseX,mouseY); //加這行
rotateZ(radians(frameCount)); //對Z軸旋轉
translate(0,-50); //把下端移到中心
box(10,100,10); //可轉動的長條
}
現在中圓繞著大圓轉 小圓繞著中圓轉
現在棒子會跟著鼠標移動了
課堂練習6
練習自轉
//week04_06_push_translate_rotate_sphere_pop
void setup(){
size(400,400,P3D);
}
void draw(){
background(128);
pushMatrix();
translate(mouseX,mouseY);
rotateY(radians(frameCount));
sphere(100);
popMatrix();
}
課堂練習7
練習公轉
//week04_07
void setup(){
size(400,400,P3D);
}
void draw(){
background(128);
translate(width/2,height/2);
sphere(50);
rotateY(radians(frameCount));
pushMatrix();
translate(150,0);
rotateY(radians(frameCount));
sphere(30);
popMatrix();
}
課堂練習8
再加一顆球
//week04_08_sun_earth_moon
void setup(){
size(400,400,P3D);
}
void draw(){
background(128);
translate(width/2,height/2);
sphere(50); //太陽(大)
rotateY(radians(frameCount));
pushMatrix();
translate(150,0);
rotateY(radians(frameCount));
sphere(30); //地球(中)
pushMatrix();
translate(50,0);
rotateY(radians(frameCount));
sphere(10); //月球(小)
popMatrix();
popMatrix();
}
現在中圓繞著大圓轉 小圓繞著中圓轉
課堂練習9
讓地球有顏色
//week04_09_earth_texture_image
//googleLearth map texture 下載1張地球的圖片 earth.jpg
//把圖檔拉進程式裡
PImage img =loadImage("earth.jpg");
size(600,300);
image(img,0,0,600,300);
課堂練習10
//week04_10_earth_texture_image
//googleLearth map texture 下載1張地球的圖片 earth.jpg
//把圖檔拉進程式裡
size(400,400,P3D);
PShape earth=createShape(SPHERE,100);
PImage img =loadImage("earth.jpg");
earth.setTexture(img);
shape(earth);
課堂練習11
//week04_11_earth_setTexture_translate_rotate
PShape earth;
void setup(){
size(400,400,P3D);
earth=createShape(SPHERE,100);
PImage img=loadImage("earth.jpg");
earth.setTexture(img);
}
void draw(){
background(0);
translate(width/2,height/2);
rotateY(radians(frameCount));
shape(earth);
}
課堂練習12
換月亮 把所有earth換moon
//week04_12_moon_setTexture_translate_rotate
PShape moon;
void setup(){
size(400,400,P3D);
moon=createShape(SPHERE,100);
PImage img=loadImage("moon.jpg");
moon.setTexture(img);
}
void draw(){
background(0);
translate(width/2,height/2);
rotateY(radians(frameCount));
shape(moon);
}
課堂練習13
換太陽 把所有moon換sun
//week04_13_sun_setTexture_translate_rotate
PShape sun;
void setup(){
size(400,400,P3D);
sun=createShape(SPHERE,100);
PImage img=loadImage("sun.jpg");
sun.setTexture(img);
}
void draw(){
background(0);
translate(width/2,height/2);
rotateY(radians(frameCount));
shape(sun);
}
課堂練習14
現在三顆星球都準備好了 結合課堂練習8讓三顆球都有圖片//week04_14_sun_earth_moon_setTexture
PShape sun,earth,moon;
//樓下 剪貼自week04_08,樓上是 week04_11,12,13
void setup(){
size(400,400,P3D);
sun=createShape(SPHERE,100);
PImage img=loadImage("sun.jpg");
sun.setTexture(img);
earth=createShape(SPHERE,30);
img=loadImage("earth.jpg");
earth.setTexture(img);
moon=createShape(SPHERE,10);
img=loadImage("moon.jpg");
moon.setTexture(img);
}
void draw(){
background(128);
translate(width/2,height/2);
shape(sun); //sphere(50); //太陽
rotateY(radians(frameCount));
pushMatrix();
translate(150,0);
rotateY(radians(frameCount));
shape(earth);//sphere(30); //地球
pushMatrix();
translate(50,0);
rotateY(radians(frameCount));
shape(moon); //sphere(10); //月球
popMatrix();
popMatrix();
}
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