02160111_鄭庭峰,week02

製作簡易小畫家 ；

         滑鼠移動到哪，就畫到哪

當按下滑鼠時，開始畫

void setup(){

  size(800,600);

}

void draw(){

  if(mousePressed)

   line(mouseX, mouseY,pmouseX,pmouseY);

} 

改背景色，左邊能控制線的顏色

void setup(){

  size(800,600);

  background(#00FFEC);

  stroke(#FF0F17);                     ///

}

void draw(){

  fill(255,0,0);  rect(0,0,100,100);

  fill(255,128,0);  rect(0,100,100,100);

  fill(255,255,0);  rect(0,200,100,100);

  fill(0,255,0);  rect(0,300,100,100);

  fill(0,0,255);  rect(0,400,100,100);

} 

void mouseDragged(){

  line(mouseX,mouseY,pmouseX,pmouseY);

}

void mousePressed(){

  if(mouseX<100 && mouseY<100){stroke(255,0,0);}

  else if(mouseX<100 && mouseY<200){stroke(255,128,0);}

  else if(mouseX<100 && mouseY<300){stroke(255,255,0);}

  else if(mouseX<100 && mouseY<400){stroke(0,255,0);}

  else if(mouseX<100 && mouseY<500){stroke(0,0,255);}

}

左邊能控制線的顏色，右邊能改變粗細

void setup(){

  size(800,600);

  background(#00FFEC);

  stroke(#FF0F17);

}

float myTsuTsuDer=1;

color myStroke=color(0);

void draw(){

  stroke(0);  strokeWeight(1);

  fill(255,0,0);  rect(0,0,100,100);

  fill(255,128,0);  rect(0,100,100,100);

  fill(255,255,0);  rect(0,200,100,100);

  fill(0,255,0);  rect(0,300,100,100);

  fill(0,0,255);  rect(0,400,100,100);

  stroke(myStroke);  strokeWeight(myTsuTsuDer);

} 

void mouseDragged(){

  line(mouseX,mouseY,pmouseX,pmouseY);

}

void mousePressed(){

  if(mouseX<100 && mouseY<100){myStroke=color(255,0,0);}

  else if(mouseX<100 && mouseY<200){myStroke=color(255,128,0);}

  else if(mouseX<100 && mouseY<300){myStroke=color(255,255,0);}

  else if(mouseX<100 && mouseY<400){myStroke=color(0,255,0);}

  else if(mouseX<100 && mouseY<500){myStroke=color(0,0,255);}

  if(mouseX>700) myTsuTsuDer=mouseY/30;

}

貌似用細線刮畫@@
PImage imgBG;
PImage imgBlack;
void setup(){
  size(800,600);
  imgBG=loadImage("colorBG.jpg");
  imgBlack=createImage(800,600,ARGB);
  imgBlack.loadPixels();
  for(int i=0;i<imgBlack.pixels.length;i++){
    imgBlack.pixels[i]=color(0,0,0,255);
  }
  imgBlack.updatePixels();
}
void draw(){
  image(imgBG,0,0,width,height);
  image(imgBlack,0,0,width,height);
}
void mouseDragged(){
  imgBlack.loadPixels();
  imgBlack.pixels[mouseX+mouseY*width]=color(0,0,0,0);
  imgBlack.updatePixels();
}

用粗線刮畫
PImage imgBG;
PGraphics pgBlack;
void setup(){
  size(800,600);
  imgBG=loadImage("colorBG.jpg");
  imgBG.resize(800,600);
  pgBlack=createGraphics(800,600);
  pgBlack.beginDraw();
  pgBlack.background(0);
  pgBlack.strokeWeight(50);
  pgBlack.stroke(0,0,0,28);
  pgBlack.endDraw();
}  
void draw(){
  background(0);
  imgBG.mask(pgBlack);
  if(keyPressed) image(pgBlack,0,0);
  else image(imgBG,0,0,width,height);
}
void mouseDragged(){
  pgBlack.beginDraw();
  pgBlack.strokeWeight(45); pgBlack.stroke(255);
  pgBlack.line(mouseX,mouseY,pmouseX,pmouseY);
  pgBlack.endDraw();
}