import os
import numpy
import moderngl
import moderngl_window
from moderngl_window.conf import settings
from moderngl_window.resources import programs
from moderngl_window.meta import ProgramDescription
settings.PROGRAM_DIRS.append(os.path.join(os.path.dirname(__file__), 'programs'))
[docs]class MeshProgram:
"""
Describes how a mesh is rendered using a specific shader program
"""
[docs] def __init__(self, program: moderngl.Program = None, **kwargs):
"""Initialize.
Args:
program: The moderngl program
"""
self.program = program
@property
def ctx(self):
"""moderngl.Context: The current context"""
return moderngl_window.ctx()
[docs] def draw(self, mesh, projection_matrix: numpy.ndarray = None,
model_matrix: numpy.ndarray = None, camera_matrix: numpy.ndarray = None, time=0.0):
"""Draw code for the mesh
Args:
mesh (Mesh): The mesh to render
Keyword Args:
projection_matrix (numpy.ndarray): projection_matrix (bytes)
model_matrix (numpy.ndarray): view_matrix (bytes)
camera_matrix (numpy.ndarray): camera_matrix (bytes)
time (float): The current time
"""
self.program["m_proj"].write(projection_matrix)
self.program["m_mv"].write(model_matrix)
mesh.vao.render(self.program)
[docs] def apply(self, mesh):
"""
Determine if this ``MeshProgram`` should be applied to the mesh.
Can return self or some ``MeshProgram`` instance to support dynamic ``MeshProgram`` creation
Args:
mesh: The mesh to inspect
"""
raise NotImplementedError("apply is not implemented. Please override the MeshProgram method")
class ColorProgram(MeshProgram):
"""
Simple color program
"""
def __init__(self, program=None, **kwargs):
super().__init__(program=None)
self.program = programs.load(ProgramDescription(path="scene_default/color.glsl"))
def draw(self, mesh, projection_matrix=None, model_matrix=None, camera_matrix=None, time=0):
if mesh.material:
# if mesh.material.double_sided:
# self.ctx.disable(moderngl.CULL_FACE)
# else:
# self.ctx.enable(moderngl.CULL_FACE)
if mesh.material.color:
self.program["color"].value = tuple(mesh.material.color)
else:
self.program["color"].value = (1.0, 1.0, 1.0, 1.0)
self.program["m_proj"].write(projection_matrix)
self.program["m_model"].write(model_matrix)
self.program["m_cam"].write(camera_matrix)
mesh.vao.render(self.program)
def apply(self, mesh):
if not mesh.material:
return None
if not mesh.attributes.get("NORMAL"):
return None
if mesh.material.mat_texture is None:
return self
return None
class TextureProgram(MeshProgram):
"""
Simple texture program
"""
def __init__(self, program=None, **kwargs):
super().__init__(program=None)
self.program = programs.load(ProgramDescription(path="scene_default/texture.glsl"))
def draw(self, mesh, projection_matrix=None, model_matrix=None, camera_matrix=None, time=0):
# if mesh.material.double_sided:
# self.ctx.disable(moderngl.CULL_FACE)
# else:
# self.ctx.enable(moderngl.CULL_FACE)
mesh.material.mat_texture.texture.use()
self.program["texture0"].value = 0
self.program["m_proj"].write(projection_matrix)
self.program["m_model"].write(model_matrix)
self.program["m_cam"].write(camera_matrix)
mesh.vao.render(self.program)
def apply(self, mesh):
if not mesh.material:
return None
if not mesh.attributes.get("NORMAL"):
return None
if mesh.material.mat_texture is not None:
return self
return None
class FallbackProgram(MeshProgram):
"""
Fallback program only rendering positions in white
"""
def __init__(self, program=None, **kwargs):
super().__init__(program=None)
self.program = programs.load(ProgramDescription(path="scene_default/fallback.glsl"))
def draw(self, mesh, projection_matrix=None, model_matrix=None, camera_matrix=None, time=0):
self.program["m_proj"].write(projection_matrix)
self.program["m_model"].write(model_matrix)
self.program["m_cam"].write(camera_matrix)
if mesh.material:
self.program["color"].value = tuple(mesh.material.color[0:3])
else:
self.program["color"].value = (1.0, 1.0, 1.0)
mesh.vao.render(self.program)
def apply(self, mesh):
return self