Rotate the Square Around Paddle 1 - Demo 13¶

Objective¶

Rotate the square around paddle1’s center.

Move the Paddles using the Keyboard¶

Keyboard Input	Action
w	Move Left Paddle Up
s	Move Left Paddle Down
k	Move Right Paddle Down
i	Move Right Paddle Up
d	Increase Left Paddle’s Rotation
a	Decrease Left Paddle’s Rotation
l	Increase Right Paddle’s Rotation
j	Decrease Right Paddle’s Rotation
UP	Move the camera up, moving the objects down
DOWN	Move the camera down, moving the objects up
LEFT	Move the camera left, moving the objects right
RIGHT	Move the camera right, moving the objects left
q	Rotate the square around its center
e	Rotate the square around paddle 1’s center

Description¶

Cayley Graph¶

src/modelviewprojection/demo13.py¶

rotation_around_paddle1: float = 0.0

Event Loop¶

src/modelviewprojection/demo13.py¶

while not glfw.window_should_close(window):

...

src/modelviewprojection/demo13.py¶

    GL.glColor3f(0.0, 0.0, 1.0)
    GL.glBegin(GL.GL_QUADS)
    for ms in square:
        ms_to_ndc: mu.InvertibleFunction[mu2d.Vector2D] = mu.compose(
            [
                # camera space to NDC
                mu.uniform_scale(1.0 / 10.0),
                # world space to camera space
                mu.inverse(mu.translate(camera.position_ws)),
                # model space to world space
                mu.compose(
                    [
                        mu.translate(paddle1.position),
                        mu2d.rotate(paddle1.rotation),
                    ]
                ),
                # square space to paddle 1 space
                mu.compose(
                    [
                        mu2d.rotate(rotation_around_paddle1),
                        mu.translate(mu2d.Vector2D(x=2.0, y=0.0)),
                        mu2d.rotate(square_rotation),
                    ]
                ),
            ]
        )
        square_vector_ndc: mu2d.Vector2D = ms_to_ndc(ms)
        GL.glVertex2f(square_vector_ndc.x, square_vector_ndc.y)
    GL.glEnd()