Python Matrix4.new_look_at示例

示例#1

文件： simple-visualization.py 项目： msarch/py

def on_draw():

    a = 1.6
    b = a * sqrt(3) / 3
    r = sqrt(1 - b*b)
    R = Vector3(a, a, a).normalized() * b
    cs = Matrix4.new_translate(R[0], R[1], R[2]) * Matrix4.new_look_at(Vector3(0, 0, 0), R, Vector3(0, 1, 0))

    glDisable(GL_DEPTH_TEST)
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
    glLoadIdentity()
    draw_coords(Matrix4.new_identity(), 2)
    draw_line((0, 0, 0), R, (1, 1, 0))
    draw_coords(cs, r, 3)
    glEnable(GL_DEPTH_TEST)
    draw_triangle((a, 0, 0), (0, a, 0), (0, 0, a), (.5, .5, 1), .2)
    draw_sphere(1, (1, .5, .5), .2)

示例#2

def on_draw():

    a = 1.6
    b = a * sqrt(3) / 3
    r = sqrt(1 - b * b)
    R = Vector3(a, a, a).normalized() * b
    cs = Matrix4.new_translate(R[0], R[1], R[2]) * Matrix4.new_look_at(
        Vector3(0, 0, 0), R, Vector3(0, 1, 0))

    glDisable(GL_DEPTH_TEST)
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
    glLoadIdentity()
    draw_coords(Matrix4.new_identity(), 2)
    draw_line((0, 0, 0), R, (1, 1, 0))
    draw_coords(cs, r, 3)
    glEnable(GL_DEPTH_TEST)
    draw_triangle((a, 0, 0), (0, a, 0), (0, 0, a), (.5, .5, 1), .2)
    draw_sphere(1, (1, .5, .5), .2)