push_matrix()

push_matrix()#

Pushes the current transformation matrix onto the matrix stack.

Examples#

example picture for push_matrix()

def setup():
    py5.fill(255)
    py5.rect(0, 0, 50, 50)  # white rectangle
    
    py5.push_matrix()
    py5.translate(30, 20)
    py5.fill(0)
    py5.rect(0, 0, 50, 50)  # black rectangle
    py5.pop_matrix()
    
    py5.fill(100)
    py5.rect(15, 10, 50, 50)  # gray rectangle

example picture for push_matrix()

def setup():
    py5.ellipse(0, 50, 33, 33)  # left circle
    
    py5.stroke_weight(10)
    py5.fill(204, 153, 0)
    
    with py5.push():
        py5.translate(50, 0)
        py5.ellipse(0, 50, 33, 33)  # middle circle
    
    py5.stroke_weight(1)
    py5.fill(255)
    py5.ellipse(100, 50, 33, 33)  # right circle

Description#

Pushes the current transformation matrix onto the matrix stack. Understanding push_matrix() and pop_matrix() requires understanding the concept of a matrix stack. The push_matrix() function saves the current coordinate system to the stack and pop_matrix() restores the prior coordinate system. push_matrix() and pop_matrix() are used in conjuction with the other transformation functions and may be embedded to control the scope of the transformations.

This method can be used as a context manager to ensure that pop_matrix() always gets called, as shown in the last example.

Underlying Processing method: pushMatrix

Signatures#

push_matrix() -> None

Updated on March 06, 2023 02:49:26am UTC

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