def draw(self):
GLFWViewer.poll_events()
glViewport(0, 0, self.width, self.height)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
with program.use(self.prog) as prog:
program.set_uniform(prog, 'projectionMatrix',
self.window.projection_matrix)
program.set_uniform(prog, 'viewMatrix', self.window.view_matrix)
program.set_uniform(prog, 'modelMatrix', np.eye(4))
glBindTexture(GL_TEXTURE_2D, self.matcap_tex)
program.set_uniform(prog, 'matCap', 0)
imdraw.torusknot(prog)
self.window.swap_buffers()
window = GLFWViewer(width, height, (0.6, 0.7, 0.7, 1.0))
with window:
glEnable(GL_DEPTH_TEST)
glEnable(GL_CULL_FACE)
while not window.should_close():
glViewport(0, 0, window.width, window.height)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
with program.use(skybox_program):
program.set_uniform(skybox_program, 'projection',
window.projection_matrix)
sky_view = glm.mat4(glm.mat3(window.view_matrix))
program.set_uniform(skybox_program, 'view', sky_view)
camera_pos = glm.transpose(
glm.transpose(glm.inverse(window.view_matrix)))[3].xyz
program.set_uniform(skybox_program, 'cameraPos', camera_pos)
program.set_uniform(skybox_program, 'skybox', 0)
program.set_uniform(skybox_program, 'groundProjection', True)
glActiveTexture(GL_TEXTURE0 + 0)
glBindTexture(GL_TEXTURE_CUBE_MAP, env_cubemap)
imdraw.cube(skybox_program, flip=True)
glBindTexture(GL_TEXTURE_CUBE_MAP, 0)
glDepthMask(GL_TRUE)
# draw grid
window.swap_buffers()
GLFWViewer.poll_events()
def render(self):
# Animate
# -------
import math, time
spotlight.position = glm.vec3(math.cos(time.time() * 3) * 4, 0.3, -4)
spotlight.direction = -spotlight.position
pointlight.position = glm.vec3(
math.cos(time.time()) * 4, 4,
math.sin(time.time()) * 4)
self.camera.transform = glm.inverse(self.window.view_matrix)
# Render passes
# -------------
## Geometry
self.geometry_pass.camera = self.camera # window.projection_matrix, window.view_matrix
self.geometry_pass.render()
## Shadowmaps
dirlight.shadowpass.camera = dirlight.camera
dirlight.shadowpass.render()
spotlight.shadowpass.camera = spotlight.camera
spotlight.shadowpass.render()
pointlight.shadowpass.position = pointlight.position
pointlight.shadowpass.render()
## Lighting
self.lighting_pass.cameraPos = self.camera.position
self.lighting_pass.gPosition = self.geometry_pass.gPosition
self.lighting_pass.gNormal = self.geometry_pass.gNormal
self.lighting_pass.gAlbedoSpecular = self.geometry_pass.gAlbedoSpecular
self.lighting_pass.gRoughness = self.geometry_pass.gRoughness
self.lighting_pass.gMetallic = self.geometry_pass.gMetallic
self.lighting_pass.gEmissive = self.geometry_pass.gEmissive
self.lighting_pass.render()
## Forward rendering
# - Copy depth from geometry pass
glBindFramebuffer(GL_READ_FRAMEBUFFER, self.geometry_pass.gBuffer)
glBindFramebuffer(GL_DRAW_FRAMEBUFFER,
self.forward_fbo) # write to default framebuffer
glBlitFramebuffer(0, 0, self.width, self.height, 0, 0, self.width,
self.height, GL_DEPTH_BUFFER_BIT, GL_NEAREST)
glBindFramebuffer(GL_READ_FRAMEBUFFER, self.lighting_pass.fbo)
glBlitFramebuffer(0, 0, self.width, self.height, 0, 0, self.width,
self.height, GL_COLOR_BUFFER_BIT, GL_NEAREST)
glBindFramebuffer(GL_FRAMEBUFFER, 0)
glEnable(GL_DEPTH_TEST)
glDepthFunc(GL_LEQUAL)
glDepthMask(GL_FALSE)
with fbo.bind(self.forward_fbo):
# draw skybox
glViewport(0, 0, self.width, self.height)
with program.use(self.skybox_program) as prog:
program.set_uniform(prog, 'projection', self.camera.projection)
sky_view = glm.mat4(glm.mat3(self.camera.view))
program.set_uniform(prog, 'view', sky_view)
program.set_uniform(prog, 'cameraPos', self.camera.position)
program.set_uniform(prog, 'skybox', 0)
program.set_uniform(prog, 'groundProjection', True)
glActiveTexture(GL_TEXTURE0 + 0)
glBindTexture(GL_TEXTURE_CUBE_MAP,
self.environment_pass.cubemap)
imdraw.cube(prog, flip=True)
glBindTexture(GL_TEXTURE_CUBE_MAP, 0)
glDepthMask(GL_TRUE)
## Tonemapping
self.tonemapping_pass.hdrimage = self.lighting_pass.beauty
self.tonemapping_pass.exposure = 0.0
self.tonemapping_pass.gamma = 2.2
self.tonemapping_pass.render()
# Render to screen
# ----------------
glViewport(0, 0, self.width, self.height)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
glDisable(GL_DEPTH_TEST)
# draw to screen
imdraw.texture(self.tonemapping_pass.ldrimage,
(0, 0, self.width, self.height))
# debug
imdraw.texture(self.geometry_pass.gPosition, (0, 0, 90, 90))
imdraw.texture(self.geometry_pass.gNormal, (100, 0, 90, 90))
imdraw.texture(self.geometry_pass.gAlbedoSpecular, (200, 0, 90, 90),
shuffle=(0, 1, 2, -1))
imdraw.texture(self.geometry_pass.gAlbedoSpecular, (300, 0, 90, 90),
shuffle=(3, 3, 3, -1))
imdraw.texture(self.geometry_pass.gRoughness, (400, 0, 90, 90),
shuffle=(0, 0, 0, -1))
imdraw.texture(self.geometry_pass.gMetallic, (500, 0, 90, 90),
shuffle=(0, 0, 0, -1))
imdraw.texture(dirlight.shadowpass.texture, (0, 100, 90, 90),
shuffle=(0, 0, 0, -1))
imdraw.texture(spotlight.shadowpass.texture, (100, 100, 90, 90),
shuffle=(0, 0, 0, -1))
imdraw.cubemap(pointlight.shadowpass.cubemap, (200, 100, 90, 90),
self.window.projection_matrix, self.window.view_matrix)
imdraw.texture(self.environment_tex, (0, 200, 90, 90))
imdraw.cubemap(self.environment_pass.cubemap, (100, 200, 90, 90),
self.window.projection_matrix, self.window.view_matrix)
imdraw.cubemap(self.irradiance_pass.irradiance, (200, 200, 90, 90),
self.window.projection_matrix, self.window.view_matrix)
imdraw.cubemap(self.prefilter_pass.prefilter, (300, 200, 90, 90),
self.window.projection_matrix, self.window.view_matrix)
imdraw.texture(self.brdf_pass.brdflut, (400, 200, 90, 90))
imdraw.texture(self.lighting_pass.beauty, (0, 300, 90, 90))
# swap buffers
# ------------
self.window.swap_buffers()
GLFWViewer.poll_events()