def draw(self):
'''Draw the mesh on screen (using display list if compiled)'''
if self.list:
glCallList(self.list)
return
glPushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT)
glPushAttrib(GL_CURRENT_BIT | GL_ENABLE_BIT | GL_LIGHTING_BIT)
glEnable(GL_CULL_FACE)
glCullFace(GL_BACK)
for group in self.groups:
if group.material:
group.material.apply()
if group.array is None:
if group.material and group.material.texture:
if group.material.texture.rectangle:
# texture is a rectangle texture
# that's mean we need to adjust the range of texture
# coordinate from original 0-1 to 0-width/0-height
group.vertices[0::8] = map(
lambda x: x * group.material.texture.width,
group.vertices[0::8]
)
group.vertices[1::8] = map(
lambda x: x * group.material.texture.height,
group.vertices[1::8]
)
group.array = (GLfloat * len(group.vertices))(*group.vertices)
group.triangles = len(group.vertices) / 8
glInterleavedArrays(GL_T2F_N3F_V3F, 0, group.array)
glDrawArrays(GL_TRIANGLES, 0, group.triangles)
if group.material:
group.material.unapply()
glPopAttrib()
glPopClientAttrib()
def init_opengl(self):
""" initialize the opengl settings to render the scene """
self.inverseModelView = numpy.identity(4)
self.modelView = numpy.identity(4)
glEnable(GL_CULL_FACE)
glCullFace(GL_BACK)
glEnable(GL_DEPTH_TEST)
glDepthFunc(GL_LESS)
glEnable(GL_LIGHT0)
glLightfv(GL_LIGHT0, GL_POSITION, GLfloat_4(0, 0, 1, 0))
glLightfv(GL_LIGHT0, GL_SPOT_DIRECTION, GLfloat_3(0, 0, -1))
glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE)
glEnable(GL_COLOR_MATERIAL)
glClearColor(0.4, 0.4, 0.4, 0.0)
def init_opengl(self):
""" 初始化opengl的配置 """
#模型视图矩阵
self.inverseModelView = numpy.identity(4)
#模型视图矩阵的逆矩阵
self.modelView = numpy.identity(4)
#开启剔除操作效果
glEnable(GL_CULL_FACE)
#取消对多边形背面进行渲染的计算（看不到的部分不渲染）
glCullFace(GL_BACK)
#开启深度测试
glEnable(GL_DEPTH_TEST)
#测试是否被遮挡，被遮挡的物体不予渲染
glDepthFunc(GL_LESS)
#启用0号光源
glEnable(GL_LIGHT0)
#设置光源的位置
glLightfv(GL_LIGHT0, GL_POSITION, GLfloat_4(0, 0, 1, 0))
#设置光源的照射方向
glLightfv(GL_LIGHT0, GL_SPOT_DIRECTION, GLfloat_3(0, 0, -1))
#设置材质颜色
glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE)
glEnable(GL_COLOR_MATERIAL)
#设置清屏的颜色
glClearColor(0.4, 0.4, 0.4, 0.0)
def draw(self,
camera_matrix: numpy.ndarray,
camera_position: PointCoordinatesAny = None):
"""
Draw the selection box
:param camera_matrix: 4x4 transformation matrix for the camera
:param camera_position: The position of the camera. Used to flip draw direction if camera inside box.
:return:
"""
self._setup()
if self._rebuild:
self._create_geometry()
self._draw_mode = GL_TRIANGLES
transformation_matrix = numpy.matmul(camera_matrix,
self.transformation_matrix)
glPushAttrib(GL_DEPTH_BUFFER_BIT
| GL_POLYGON_BIT) # store opengl state
if camera_position is not None and camera_position in self:
glCullFace(GL_FRONT)
else:
glCullFace(GL_BACK)
self.draw_start = 0
self.draw_count = 36
super()._draw(transformation_matrix)
# draw the lines around the boxes
glDisable(GL_DEPTH_TEST)
self._draw_mode = GL_LINE_STRIP
super()._draw(transformation_matrix)
glPopAttrib() # reset to starting state
def init_opengl(self):
#model view matrix
self.inverseModelView = numpy.identity(4)
#its anti-matrix
self.modelView = numpy.identity(4)
#open tichu effect
glEnable(GL_CULL_FACE)
#to not rend invisible part
glCullFace(GL_BACK)
#open depth test
glEnable(GL_DEPTH_TEST)
#objects being covered ot to rend
glDepthFunc(GL_LESS)
#open light 0
glEnable(GL_LIGHT0)
#to set the position of light
glLightfv(GL_LIGHT0, GL_POSITION, GLfloat_4(0, 0, 1, 0))
#to set the direction that light sheds at
glLightfv(GL_LIGHT0, GL_SPOT_DIRECTION, GLfloat_3(0, 0, -1))
#to set material color
glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE)
glEnable(GL_COLOR_MATERIAL)
#set the color of a clear-screen
glClearColor(0.4, 0.4, 0.4, 0.0)
def draw(self):
'''Draw the mesh on screen (using display list if compiled)'''
if self.list:
glCallList(self.list)
return
glPushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT)
glPushAttrib(GL_CURRENT_BIT | GL_ENABLE_BIT | GL_LIGHTING_BIT)
glEnable(GL_CULL_FACE)
glCullFace(GL_BACK)
for group in self.groups:
if group.material:
group.material.apply()
if group.array is None:
if group.material and group.material.texture:
if group.material.texture.rectangle:
# texture is a rectangle texture
# that's mean we need to adjust the range of texture
# coordinate from original 0-1 to 0-width/0-height
group.vertices[0::8] = map(
lambda x: x * group.material.texture.width,
group.vertices[0::8])
group.vertices[1::8] = map(
lambda x: x * group.material.texture.height,
group.vertices[1::8])
group.array = (GLfloat * len(group.vertices))(*group.vertices)
group.triangles = len(group.vertices) / 8
glInterleavedArrays(GL_T2F_N3F_V3F, 0, group.array)
glDrawArrays(GL_TRIANGLES, 0, group.triangles)
if group.material:
group.material.unapply()
glPopAttrib()
glPopClientAttrib()
def __enable_depth_test(self):
"""Enable depth test and faces culling.
Needed to not render invisible vertices and triangles.
"""
glDepthMask(GL_TRUE)
glDepthFunc(GL_LESS)
glCullFace(GL_FRONT)
glEnable(GL_DEPTH_TEST)
glEnable(GL_STENCIL_TEST)
def __enable_depth_test(self):
"""Enable depth test and faces culling.
Needed to not render invisible vertices and triangles.
"""
glDepthMask(GL_TRUE)
glDepthFunc(GL_LESS)
glCullFace(GL_FRONT)
glEnable(GL_DEPTH_TEST)
glEnable(GL_STENCIL_TEST)
def __generate_model(self):
"""Generate rotated model with shadows."""
glEnable(GL_CULL_FACE)
glCullFace(GL_FRONT)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
self.__sh.change_shader(vertex=0, fragment=0)
self.__prepare_shaders(self.__model_matrix, self.__light_matrix, False)
self.__sh.bind_buffer()
self.__sh.use_shaders()
glDrawElements(GL_TRIANGLES, View.__triangles.size, GL_UNSIGNED_SHORT,
View.__triangles)
self.__sh.clear()
def draw(self, camera_matrix: numpy.ndarray):
"""Draw all of the levels."""
for level, transform, is_mirrored in zip(self._objects,
self._transformation_matrices,
self._is_mirrored):
glPushAttrib(GL_POLYGON_BIT) # store opengl state
if is_mirrored:
glCullFace(GL_FRONT)
else:
glCullFace(GL_BACK)
level.draw(numpy.matmul(camera_matrix, transform))
glPopAttrib() # reset to starting state
def render(self,mode='OPAQUE'):
opaque_pieces = self._style.get('opaque-pieces',())
if opaque_pieces == True or not self._has_transparent:
opaque_pieces = self.pieces
glEnable(GL_CULL_FACE)
if mode == 'OPAQUE':
if self._has_transparent:
return # can't guarantee opaque render
pieces = opaque_pieces
glCullFace(GL_BACK)
self.tnv.prepare()
for piece in pieces:
self.tnv.drawpiece(piece)
elif mode == 'TRANSPARENT':
glEnable(GL_BLEND) # just make sure
pieces = list(set(self.pieces) - set(opaque_pieces))
glCullFace(GL_FRONT) # draw backfaces first
self.tnv.prepare()
for piece in pieces:
self.tnv.drawpiece(piece)
glCullFace(GL_BACK) # draw front faces over back faces
for piece in pieces:
self.tnv.drawpiece(piece)
elif mode == 'PICK': #PICK
glCullFace(GL_BACK)
pieces = self.pieces
self.tnv.prepare()
for piece in pieces:
picking.label((self.__class__.__name__, self._name, piece))
self.tnv.drawpiece(piece)
picking.nolabel()
else:
raise ValueError("render mode %s?" % mode)
def initialize_draw(self):
self.quadric = gluNewQuadric()
gluQuadricNormals(self.quadric, GLU_SMOOTH)
self.set_specular(True)
self.set_bright(False)
glLight(GL_LIGHT0, GL_SPECULAR, [0.7, 0.7, 0.7, 1.0])
glLight(GL_LIGHT0, GL_AMBIENT, [0.1, 0.1, 0.1, 1.0])
glLight(GL_LIGHT0, GL_POSITION, [1.0, 1.0, 3.0, 0.0])
glEnable(GL_LIGHT0)
glEnable(GL_LIGHTING)
glDepthFunc(GL_LESS)
glEnable(GL_DEPTH_TEST)
glCullFace(GL_BACK)
VisBackend.initialize_draw(self)
self.tool.initialize_gl()
def initialize_draw(self):
self.quadric = gluNewQuadric()
gluQuadricNormals(self.quadric, GLU_SMOOTH)
self.set_specular(True)
self.set_bright(False)
glLight(GL_LIGHT0, GL_SPECULAR, [0.7, 0.7, 0.7, 1.0])
glLight(GL_LIGHT0, GL_AMBIENT, [0.1, 0.1, 0.1, 1.0])
glLight(GL_LIGHT0, GL_POSITION, [1.0, 1.0, 3.0, 0.0])
glEnable(GL_LIGHT0)
glEnable(GL_LIGHTING)
glDepthFunc(GL_LESS)
glEnable(GL_DEPTH_TEST)
glCullFace(GL_BACK)
VisBackend.initialize_draw(self)
self.tool.initialize_gl()
def gl_setup(self, width, height):
"""Private."""
# cut out invisible faces
glEnable(GL_CULL_FACE)
glCullFace(GL_BACK)
# enable depth buffer
glEnable(GL_DEPTH_TEST)
# enable alpha-blending
glEnable(GL_BLEND)
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
# clear to black
glClearColor(0.3, 0.3, 0.3, 1)
def init_opengl(self):
""" initialize the opengl settings to render the scene """
self.inverseModelView = numpy.identity(4)
self.modelView = numpy.identity(4)
glEnable(GL_CULL_FACE)
glCullFace(GL_BACK)
glEnable(GL_DEPTH_TEST)
glDepthFunc(GL_LESS)
glEnable(GL_LIGHT0)
glLightfv(GL_LIGHT0, GL_POSITION, GLfloat_4(0, 0, 1, 0))
glLightfv(GL_LIGHT0, GL_SPOT_DIRECTION, GLfloat_3(0, 0, -1))
glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE)
glEnable(GL_COLOR_MATERIAL)
glClearColor(1.0, 1.0, 1.0, 0.0)
def __init__(self,
display_width: int,
display_height: int,
camera: Camera,
pixel_size: float = 0.5,
projection: str = '3d') -> None:
super().__init__()
glEnable(GL_CULL_FACE)
glCullFace(GL_BACK)
# I haven't implemented yet
self.__projection: str = projection
self.__camera: Camera = camera
self.__renderers: Dict[str, AbstractRenderer] = {}
self.__projection_matrix = self.__create_orthographic_projection_matrix(
display_width, display_height, pixel_size)
def render_to_png(filename,
callback,
obb,
model_matrix=(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0,
1)):
from pygame import init, display, quit
from pygame.constants import OPENGL, DOUBLEBUF
from OpenGL.GL import glLightfv, glCullFace, glEnable, glShadeModel, glMatrixMode, glLoadIdentity, glClear, \
glLoadMatrixf, glPolygonMode, glCallList, glReadPixels, GL_LIGHT0, GL_POSITION, GL_AMBIENT, GL_DIFFUSE, \
GL_BACK, GL_LIGHTING, GL_COLOR_MATERIAL, GL_DEPTH_TEST, GL_SMOOTH, GL_PROJECTION, GL_MODELVIEW, \
GL_COLOR_BUFFER_BIT, GL_DEPTH_BUFFER_BIT, GL_FRONT_AND_BACK, GL_FILL, GL_LINE, GL_BGR, GL_UNSIGNED_BYTE
from OpenGL.GLU import gluPerspective
from cv2 import imwrite
from numpy import frombuffer, uint8
init()
viewport = (800, 600)
display.set_mode(viewport, OPENGL | DOUBLEBUF)
glLightfv(GL_LIGHT0, GL_POSITION, (0, -1, 0, 0))
glLightfv(GL_LIGHT0, GL_AMBIENT, (0.2, 0.2, 0.2, 1))
glLightfv(GL_LIGHT0, GL_DIFFUSE, (0.5, 0.5, 0.5, 1))
glCullFace(GL_BACK)
glEnable(GL_LIGHT0)
glEnable(GL_LIGHTING)
glEnable(GL_COLOR_MATERIAL)
glEnable(GL_DEPTH_TEST)
glShadeModel(GL_SMOOTH)
glMatrixMode(GL_PROJECTION)
glLoadIdentity()
width, height = viewport
gluPerspective(90.0, width / float(height), 0.1, 100.0)
glEnable(GL_DEPTH_TEST)
glMatrixMode(GL_MODELVIEW)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
glLoadIdentity()
glLoadMatrixf(model_matrix)
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL)
glCallList(callback())
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE)
glCallList(create_obb_gl_list(obb))
img_data = glReadPixels(0, 0, width, height, GL_BGR, GL_UNSIGNED_BYTE)
img = frombuffer(img_data, dtype=uint8)
img = img.reshape((height, width, 3))
imwrite(filename, img)
quit()
def draw(
self, camera_matrix: numpy.ndarray, camera_position: PointCoordinatesAny = None
):
"""
Draw the selection box
:param camera_matrix: 4x4 transformation matrix for the camera
:param camera_position: The position of the camera. Used to flip draw direction if camera inside box.
:return:
"""
self._setup()
if self._rebuild:
self._create_geometry()
transformation_matrix = numpy.matmul(camera_matrix, self.transformation_matrix)
if camera_position is not None and camera_position in self:
glCullFace(GL_FRONT)
else:
glCullFace(GL_BACK)
self._draw_mode = GL_TRIANGLES
self.draw_start = 0
self.draw_count = 108
super()._draw(transformation_matrix)
glCullFace(GL_BACK)
# draw the lines around the boxes
glDisable(GL_DEPTH_TEST)
self._draw_mode = GL_LINE_STRIP
self.draw_count = 36
for start in range(0, 3 * 36, 36):
# these must be drawn individually otherwise there will be lines connecting them.
self.draw_start = start
super()._draw(transformation_matrix)
glEnable(GL_DEPTH_TEST)
def draw(self,
camera_matrix: numpy.ndarray,
camera_position: PointCoordinatesAny = None):
"""
Draw the selection box
:param camera_matrix: 4x4 transformation matrix for the camera
:param camera_position: The position of the camera. Used to flip draw direction if camera inside box.
:return:
"""
self._setup()
if self._rebuild:
self._create_geometry()
transformation_matrix = numpy.matmul(camera_matrix,
self.transformation_matrix)
# draw the lines around the boxes
self.draw_start = 0
self.draw_count = 36
glDisable(GL_DEPTH_TEST)
self._draw_mode = GL_LINE_STRIP
super()._draw(transformation_matrix)
glEnable(GL_DEPTH_TEST)
if camera_position is not None and camera_position in self:
glCullFace(GL_FRONT)
else:
glCullFace(GL_BACK)
self._draw_mode = GL_TRIANGLES
self.draw_start = 36
# 6 faces, 9 quads/face, 2 triangles/quad, 3 verts/triangle
self.draw_count = 324
super()._draw(transformation_matrix)
glCullFace(GL_BACK)
def draw(self, camera_matrix: numpy.ndarray):
"""Draw all of the levels."""
for level, transform, is_mirrored in zip(
self._objects, self._transformation_matrices, self._is_mirrored
):
cull_state = glGetIntegerv(GL_CULL_FACE_MODE)
if is_mirrored:
glCullFace(GL_FRONT)
else:
glCullFace(GL_BACK)
level.draw(numpy.matmul(camera_matrix, transform))
glCullFace(cull_state)
def draw(self,
camera_matrix: numpy.ndarray,
camera_position: PointCoordinatesAny = None):
"""
Draw the selection box
:param camera_matrix: 4x4 transformation matrix for the camera
:param camera_position: The position of the camera. Used to flip draw direction if camera inside box.
:return:
"""
self._setup()
if self._needs_rebuild:
self._create_geometry()
self._draw_mode = GL_TRIANGLES
transformation_matrix = numpy.matmul(camera_matrix,
self.transformation_matrix)
depth_state = glGetBooleanv(GL_DEPTH_TEST)
cull_state = glGetIntegerv(GL_CULL_FACE_MODE)
if camera_position is not None and camera_position in self:
if cull_state == GL_BACK:
glCullFace(GL_FRONT)
elif cull_state == GL_FRONT:
glCullFace(GL_BACK)
self.draw_start = 0
self.draw_count = 36
super()._draw(transformation_matrix)
# draw the lines around the boxes
if depth_state:
glDisable(GL_DEPTH_TEST)
self._draw_mode = GL_LINE_STRIP
super()._draw(transformation_matrix)
if depth_state:
glEnable(GL_DEPTH_TEST)
glCullFace(cull_state)
def processFrame(self, timePassedSecs):
""" draws a scene """
# update the model view matrix
self.sceneCamera.updateKeys()
self.sceneCamera.update()
# process queued GLObject events
GLObject.signalsEmit()
# enable some default scene states
glEnable(GL_DEPTH_TEST)
######## SHADOW MAP RENDERING START ########
# offset the geometry slightly to prevent z-fighting
# note that this introduces some light-leakage artifacts
glEnable(GL_POLYGON_OFFSET_FILL)
glPolygonOffset(1.1, 4096.0)
# cull front faces for shadow rendering,
# this moves z-fighting to backfaces.
glCullFace(GL_FRONT)
# enable depth rendering shader.
# FIXME: support segment geometry shader!
# geometry shader could change the shadow shape!
self.depthShader.enable()
map(_updateLightShadowMap, self.lights)
glBindFramebuffer(GL_FRAMEBUFFER, 0)
glDisable(GL_POLYGON_OFFSET_FILL)
######## SHADOW MAP RENDERING STOP ########
#### TODO: FOG: integrate FOG ####
glEnable(GL_FOG)
glFogi(GL_FOG_MODE, GL_EXP2)
# approximate the atmosphere's filtering effect as a linear function
sunDir = array([4.0, 4.0, 4.0, 0.0], float32) # TODO: FOG: what is the sun dir ?
skyColor = array([0.8, sunDir[1] * 0.1 + 0.7, sunDir[1] * 0.4 + 0.5, 1.0], float32)
glClearColor(*skyColor)
glFogf(GL_FOG_DENSITY, 0.4)
glFogf(GL_FOG_START, 16.0)
glFogf(GL_FOG_END, self.farClip)
glFogfv(GL_FOG_COLOR, skyColor)
# fill projection matrix
glMatrixMode(GL_PROJECTION)
glLoadMatrixf(self.projectionMatrix)
glMatrixMode(GL_MODELVIEW)
# draw stuff in 3d projection
lastCam = None
glPushAttrib(GL_COLOR_BUFFER_BIT)
for (fbo, draw, cam) in self.sceneFBOS:
# render to fbo
fbo.enable()
if cam != lastCam:
cam.enable()
lastCam = cam
draw()
# disable render to texture
FBO.disable()
glPopAttrib()
glViewport(0, 0, self.winSize[0], self.winSize[1])
#### TODO: FOG: integrate FOG ####
glDisable(GL_FOG)
# change to orthogonal projection
glMatrixMode(GL_PROJECTION)
glLoadMatrixf(self.orthoMatrix)
glMatrixMode(GL_MODELVIEW)
glLoadIdentity()
# no depth test needed in orthogonal rendering
glDisable(GL_DEPTH_TEST)
# draw orthogonal to the screen
self.orthogonalPass()
def draw_box_rc(self):
# decide which face to render (@Todo: ModernGL needs a way to handle this)
glEnable(GL_CULL_FACE)
glCullFace(GL_BACK)
self.vao_rc.render()
glDisable(GL_CULL_FACE)
def _render_volume_obj(self, volume_object, width, height, VMatrix, PMatrix):
glBindFramebuffer(GL_FRAMEBUFFER, self.fbo)
glViewport(0, 0, width, height)
glActiveTexture(GL_TEXTURE0)
glBindTexture(GL_TEXTURE_3D, volume_object.stack_object.stack_texture)
glClear(GL_COLOR_BUFFER_BIT) # Clear back buffer.
glEnable(GL_CULL_FACE)
glCullFace(GL_BACK)
glUseProgram(self.b_shader.program)
glBindVertexArray(volume_object.vao)
volume_object.elVBO.bind()
mv_matrix = np.dot(VMatrix, volume_object.transform)
glUniformMatrix4fv(self.b_shader.get_uniform("mv_matrix"),
1, True, mv_matrix.astype('float32'))
glUniformMatrix4fv(self.b_shader.get_uniform("p_matrix"),
1, True, PMatrix.astype('float32'))
glDrawElements(GL_TRIANGLES, volume_object.elCount,
GL_UNSIGNED_INT, volume_object.elVBO)
volume_object.elVBO.unbind()
glBindVertexArray(0)
glUseProgram(0)
glBindFramebuffer(GL_FRAMEBUFFER, 0)
glActiveTexture(GL_TEXTURE0 + 1)
glBindTexture(GL_TEXTURE_2D, self.bfTex)
glActiveTexture(GL_TEXTURE0)
glBindTexture(GL_TEXTURE_3D, volume_object.stack_object.stack_texture)
glUseProgram(self.f_shader.program)
glUniform1i(self.f_shader.get_uniform("texture3s"), 0)
glUniform1i(self.f_shader.get_uniform("backfaceTex"), 1)
tex_inv_matrix = np.dot(PMatrix,
np.dot(mv_matrix,
la.inv(volume_object.tex_transform)))
glUniformMatrix4fv(self.f_shader.get_uniform('tex_inv_matrix'),
1,
True,
tex_inv_matrix.astype('float32'))
glUniform1f(self.f_shader.get_uniform('isolevel'),
volume_object.threshold/255.0)
glEnable(GL_CULL_FACE)
glCullFace(GL_FRONT)
glBindVertexArray(volume_object.vao)
volume_object.elVBO.bind()
glUniformMatrix4fv(self.f_shader.get_uniform("mv_matrix"),
1, True, mv_matrix.astype('float32'))
glUniformMatrix4fv(self.f_shader.get_uniform("p_matrix"),
1, True, PMatrix.astype('float32'))
glDrawElements(GL_TRIANGLES, volume_object.elCount,
GL_UNSIGNED_INT, volume_object.elVBO)
glActiveTexture(GL_TEXTURE0+1)
glBindTexture(GL_TEXTURE_2D, 0)
glCullFace(GL_BACK)
volume_object.elVBO.unbind()
glBindVertexArray(0)
glUseProgram(0)
def _render_volume_obj(self, volume_object, width, height, VMatrix, PMatrix):
glBindFramebuffer(GL_FRAMEBUFFER, self.fbo)
glViewport(0, 0, width, height)
glActiveTexture(GL_TEXTURE0)
glBindTexture(GL_TEXTURE_3D, volume_object.stack_object.stack_texture)
glClear(GL_COLOR_BUFFER_BIT) # Clear back buffer.
glEnable(GL_CULL_FACE)
glCullFace(GL_FRONT) # NB flipped
# glValidateProgram(self.b_shader.program)
# logging.debug("b_valid ", glGetProgramiv(self.b_shader.program,
# GL_VALIDATE_STATUS))
# logging.debug(glGetProgramInfoLog(self.b_shader.program).decode())
glUseProgram(self.b_shader.program)
glBindVertexArray(volume_object.vao)
volume_object.elVBO.bind()
mv_matrix = np.dot(VMatrix, volume_object.transform)
glUniformMatrix4fv(self.b_shader.get_uniform("mv_matrix"),
1, True, mv_matrix.astype('float32'))
glUniformMatrix4fv(self.b_shader.get_uniform("p_matrix"),
1, True, PMatrix.astype('float32'))
glDrawElements(GL_TRIANGLES, volume_object.elCount,
GL_UNSIGNED_INT, volume_object.elVBO)
volume_object.elVBO.unbind()
glBindVertexArray(0)
glUseProgram(0)
glBindFramebuffer(GL_FRAMEBUFFER, 0)
glActiveTexture(GL_TEXTURE0 + 1)
glBindTexture(GL_TEXTURE_2D, self.bfTex)
glActiveTexture(GL_TEXTURE0)
glBindTexture(GL_TEXTURE_3D, volume_object.stack_object.stack_texture)
glUseProgram(self.f_shader.program)
glUniform1i(self.f_shader.get_uniform("texture3s"), 0)
glUniform1i(self.f_shader.get_uniform("backfaceTex"), 1)
glEnable(GL_CULL_FACE)
glCullFace(GL_BACK)
glBindVertexArray(volume_object.vao)
volume_object.elVBO.bind()
glUniformMatrix4fv(self.f_shader.get_uniform("mv_matrix"),
1, True, mv_matrix.astype('float32'))
glUniformMatrix4fv(self.f_shader.get_uniform("p_matrix"),
1, True, PMatrix.astype('float32'))
glDrawElements(GL_TRIANGLES, volume_object.elCount,
GL_UNSIGNED_INT, volume_object.elVBO)
glActiveTexture(GL_TEXTURE0+1)
glBindTexture(GL_TEXTURE_2D, 0)
glCullFace(GL_BACK)
volume_object.elVBO.unbind()
glBindVertexArray(0)
glUseProgram(0)
