"""
Setup lighting
"""
from OpenGL.raw.GL.VERSION.GL_1_0 import (GL_AMBIENT, GL_COLOR_BUFFER_BIT,
GL_DEPTH_BUFFER_BIT, GL_DIFFUSE,
GL_FOG, GL_FOG_COLOR, GL_FOG_END,
GL_FOG_MODE, GL_FOG_START,
GL_FRONT_AND_BACK, GL_LIGHT0,
GL_LIGHT1, GL_LIGHT2, GL_LIGHT3,
GL_LIGHT4, GL_LIGHTING, GL_LINEAR,
GL_MODELVIEW, GL_POSITION,
GL_SHININESS, GL_SPECULAR,
GL_UNPACK_ALIGNMENT, glClear,
glClearColor, glDisable, glEnable,
glFogf, glFogfv, glFogi, glLightfv,
glLoadIdentity, glMaterialf,
glMatrixMode, glPixelStorei,
glPopMatrix, glPushMatrix)
[docs]
def set_fog_state(
fog_state: bool,
fog_density_value: float,
fog_start_value: float,
fog_end_value: float,
) -> None:
"""
set_fog_state
:param fog_density_value: float
:param fog_end_value: float
:param fog_start_value: float
:param fog_state: bool
:return: None
"""
if fog_start_value >= fog_end_value:
fog_start_value = fog_end_value - 1
fog_density_value = min(0.3, fog_density_value)
if fog_state:
glEnable(GL_FOG)
glFogfv(
GL_FOG_COLOR,
[
fog_density_value,
fog_density_value,
fog_density_value,
fog_density_value,
],
)
glFogi(GL_FOG_MODE, GL_LINEAR)
glFogf(GL_FOG_START, fog_start_value)
glFogf(GL_FOG_END, fog_end_value)
else:
glDisable(GL_FOG)
[docs]
def set_second_light_state(second_light_state: bool) -> None:
"""
set_second_light_state
:param second_light_state: bool Whether the second light is on or off
:return: None
Second light
"""
if second_light_state:
glEnable(GL_LIGHT1)
glLightfv(GL_LIGHT1, GL_POSITION, [-10.0, -10.0, -10.0, 1.0])
glLightfv(GL_LIGHT1, GL_DIFFUSE, [0.5, 0.5, 0.5, 1.0])
glLightfv(GL_LIGHT1, GL_SPECULAR, [0.3, 0.3, 0.3, 1.0])
glEnable(GL_LIGHT2)
glLightfv(GL_LIGHT2, GL_POSITION, [90.0, 90.0, 90.0, 1.0])
glLightfv(GL_LIGHT2, GL_DIFFUSE, [0.5, 0.5, 0.5, 1.0])
glLightfv(GL_LIGHT2, GL_SPECULAR, [0.3, 0.3, 0.3, 1.0])
glEnable(GL_LIGHT3)
glLightfv(GL_LIGHT3, GL_POSITION, [-90.0, -90.0, -90.0, 1.0])
glLightfv(GL_LIGHT3, GL_DIFFUSE, [0.5, 0.5, 0.5, 1.0])
glLightfv(GL_LIGHT3, GL_SPECULAR, [0.3, 0.3, 0.3, 1.0])
glEnable(GL_LIGHT4)
glLightfv(GL_LIGHT4, GL_POSITION, [270.0, 270.0, 270.0, 1.0])
glLightfv(GL_LIGHT4, GL_DIFFUSE, [0.5, 0.5, 0.5, 1.0])
glLightfv(GL_LIGHT4, GL_SPECULAR, [0.3, 0.3, 0.3, 1.0])
else:
glDisable(GL_LIGHT1)
[docs]
def set_background_color(show_white_background: bool) -> None:
"""
set_background_color
:param show_white_background: bool
:return: None
Choose bg color_array
"""
if show_white_background:
glClearColor(1.0, 1.0, 1.0, 1.0) # White background
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) # Black
else:
glClearColor(0.0, 0.0, 0.0, 1.0)
[docs]
def setup_lighting(mode: int = 0) -> None:
"""
setup_lighting
:param mode: int lighting gl_mode
:return: None
"""
current_shininess = 1.0
if mode == 0:
glEnable(GL_LIGHTING)
glEnable(GL_LIGHT0)
# glEnable(GL_COLOR_MATERIAL)
# Set up light position_array (in eye space)
light_pos = [10.0, 10.0, 10.0, 1.0] # positional black light
glLightfv(GL_LIGHT0, GL_POSITION, light_pos)
# Set light color_array
glLightfv(GL_LIGHT0, GL_DIFFUSE, [1.0, 1.0, 1.0, 1.0])
glLightfv(GL_LIGHT0, GL_SPECULAR, [1.0, 1.0, 1.0, 1.0])
glLightfv(GL_LIGHT0, GL_AMBIENT, [0.2, 0.2, 0.2, 1.0])
glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 128.0 * current_shininess)
glPixelStorei(GL_UNPACK_ALIGNMENT, 1)
if mode == 2:
glEnable(GL_LIGHTING)
glEnable(GL_LIGHT0)
# Set up light position_array (in eye space)
light_pos = [0.0, 0.0, 0.0, 1.0] # positional light
glLightfv(GL_LIGHT0, GL_POSITION, light_pos)
# Set light color_array
glLightfv(GL_LIGHT0, GL_DIFFUSE, [1.0, 1.0, 1.0, 1.0])
glLightfv(GL_LIGHT0, GL_SPECULAR, [1.0, 1.0, 1.0, 1.0])
glLightfv(GL_LIGHT0, GL_AMBIENT, [0.2, 0.2, 0.2, 1.0])
elif mode == 1:
glEnable(GL_LIGHTING)
glEnable(GL_LIGHT0)
glMatrixMode(GL_MODELVIEW)
glPushMatrix()
glLoadIdentity() # reset modelview matrix
# Set light position_array (camera-relative)
light_pos = [10.0, 10.0, 10.0, 1.0]
glLightfv(GL_LIGHT0, GL_POSITION, light_pos)
glPopMatrix()
# Set light properties (these are not affected by the matrix)
glLightfv(GL_LIGHT0, GL_DIFFUSE, [1.0, 1.0, 1.0, 1.0])
glLightfv(GL_LIGHT0, GL_SPECULAR, [1.0, 1.0, 1.0, 1.0])
glLightfv(GL_LIGHT0, GL_AMBIENT, [0.2, 0.2, 0.2, 1.0])
elif mode == 3:
glEnable(GL_LIGHTING)
glEnable(GL_LIGHT0)
# Set light properties (independent of matrix)
glLightfv(GL_LIGHT0, GL_DIFFUSE, [1.0, 1.0, 1.0, 1.0])
glLightfv(GL_LIGHT0, GL_SPECULAR, [1.0, 1.0, 1.0, 1.0])
glLightfv(GL_LIGHT0, GL_AMBIENT, [0.2, 0.2, 0.2, 1.0])
# Call this *after* your model_matrix/view transforms (e.g., after gl_update_camera_matrix)
light_pos = [
10.0,
10.0,
10.0,
1.0,
] # Positional light, relative to object/world
glLightfv(GL_LIGHT0, GL_POSITION, light_pos)