在 Processing 中连续旋转对象矩阵

Question

我有一堆线可以画一个复合圆。我想让这个复合圆连续旋转但无法弄清楚。为了进一步解释我想要什么，它有点像加载微调器。

def setup():
    size(640, 640)
    frameRate(30)

def draw():
    background(0)
    stroke(100, 100, 100)
    strokeWeight(4)
    translate(width/2, height/2)

    # I want to rotate/make this composite circle spin continuously
    make_circle()


def make_circle():
    inner_radius = width / 8
    line_length = width / 3
    rx = sqrt(2) * inner_radius
    ry = rx

    steps = 10
    pushMatrix()
    for dtheta in range(0, 360, steps):
        dtheta = radians(dtheta)
        coss = cos(dtheta)
        sinn = sin(dtheta)
        
        line(inner_radius * coss, inner_radius * sinn, line_length * coss, line_length * sinn)
    popMatrix()

Answer 1

你需要rotate the complete shape. Add an angle variable in global namespace. Increment the angle inn every frame and rotate角度的形状（默认角度的单位是弧度）：

angle = 0

def draw():
    global angle
    
    background(0)
    stroke(100, 100, 100)
    strokeWeight(4)
    translate(width/2, height/2)
    
    rotate(radians(angle))
    angle += 1
    make_circle()

在 Processing 中连续旋转对象矩阵

Continuously spin a matrix of objects in Processing

python

processing