processing 变形球 X 极光

• Based on Coding Challenge #28

Aurora

1. 发光球球

• # 发光
• index = x + y*width
• for (Blob b : blobs):
•  d = dist(x, y, b.pos.x, b.pos.y)
•  col += 100 * b.r / d
• pixels[index] = color(col)
• # 移动
• pos.add(vel)
• if (pos.x > width || pos.x < 0):
•  vel.x *= -1

2. 背景

• # 彩色
• colorMode(HSB,360,100,100,100)
• pixels[index] = color(constrain(sum, 75, 230), 80, 100, 5)
• # 叠加背景图
• tint(255, 20)
• image(back, 0, 0)

3. 调整

• # 范围
• if ( d<random(110, 140) || (d>random(0, 30) && d<random(40, 100))):
•  ke[index] = true
• # 颜色
• if (ke[index]):
•  pixels[index] = color(constrain(sum, 75, 230), random(60, 100), 100, random(3, 9))