def grid(projection, view):
size = 10
# create geometry
# ---------------
logging.debug("create grid geometry")
positions = []
offset = int(size)/2
for x in range(0, int(size)+1):
positions.append((x-offset, 0, size/2))
positions.append((x-offset, 0, -size/2))
for y in range(0, int(size)+1):
positions.append((size/2, 0, y-offset))
positions.append((-size/2, 0, y-offset))
positions = np.array(positions, dtype=np.float32)
# create buffers
logging.debug("create grid buffers")
vbo = glGenBuffers(1)
glBindBuffer(GL_ARRAY_BUFFER, vbo)
glBufferData(GL_ARRAY_BUFFER, positions.nbytes, positions, GL_STATIC_DRAW)
glBindBuffer(GL_ARRAY_BUFFER, vbo)
vao = glGenVertexArrays(1)
# create program
logging.debug("create grid program")
prog = program.create(
"""#version 330 core
layout (location=0) in vec3 position;
uniform mat4 projection;
uniform mat4 view;
void main(){
gl_Position = projection * view * vec4(position, 1.0);
}
""",
"""#version 330 core
out vec4 FragColor;
void main(){
FragColor = vec4(0.5,0.5,0.5,1);
}
""")
# draw
with program.use(prog):
program.set_uniform(prog, "projection", projection)
program.set_uniform(prog, "view", view)
glBindVertexArray(vao)
loc = glGetAttribLocation(prog, "position")
glVertexAttribPointer(loc, 3, GL_FLOAT, False, 0, None)
glEnableVertexAttribArray(loc)
glDrawArrays(GL_LINES, 0, positions.size)
glBindVertexArray(0)
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()
def draw_scene_for_shadows(self, prog):
for child in self.scene.children:
# set uniforms
program.set_uniform(prog, 'model', child.transform)
# set attributes
vao, ebo, pos_vbo, uv_vbo, normal_vbo, count = self.get_geometry_buffer(
child)
glBindVertexArray(vao)
position_location = glGetAttribLocation(prog, 'position')
glBindBuffer(GL_ARRAY_BUFFER, pos_vbo)
glVertexAttribPointer(position_location, 3, GL_FLOAT, False, 0,
ctypes.c_void_p(0))
glEnableVertexAttribArray(position_location)
# draw geometry
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo)
glDrawElements(GL_TRIANGLES, count, GL_UNSIGNED_INT, None)
# cleanup bindings
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0)
glBindBuffer(GL_ARRAY_BUFFER, 0)
glBindVertexArray(0)
def draw_scene_for_geometry(self, prog):
import ctypes
for child in self.scene.children:
# set uniforms
program.set_uniform(prog, 'model', child.transform)
program.set_uniform(prog, 'albedo', child.material.albedo)
program.set_uniform(prog, 'roughness', child.material.roughness)
program.set_uniform(prog, 'metallic', child.material.metallic)
# set attributes
vao, ebo, pos_vbo, uv_vbo, normal_vbo, count = self.get_geometry_buffer(
child)
glBindVertexArray(vao)
position_location = glGetAttribLocation(prog, 'position')
glBindBuffer(GL_ARRAY_BUFFER, pos_vbo)
glVertexAttribPointer(position_location, 3, GL_FLOAT, False, 0,
ctypes.c_void_p(0))
glEnableVertexAttribArray(position_location)
uv_location = glGetAttribLocation(prog, 'uv')
if uv_location is not -1:
glBindBuffer(GL_ARRAY_BUFFER, uv_vbo)
glVertexAttribPointer(uv_location, 2, GL_FLOAT, False, 0,
ctypes.c_void_p(0))
glEnableVertexAttribArray(uv_location)
normal_location = glGetAttribLocation(prog, 'normal')
if normal_location is not -1:
glBindBuffer(GL_ARRAY_BUFFER, normal_vbo)
glVertexAttribPointer(normal_location, 3, GL_FLOAT, False, 0,
ctypes.c_void_p(0))
glEnableVertexAttribArray(normal_location)
# draw geometry
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo)
glDrawElements(GL_TRIANGLES, count, GL_UNSIGNED_INT, None)
# cleanup bindings
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0)
glBindBuffer(GL_ARRAY_BUFFER, 0)
glBindVertexArray(0)
level=logging.DEBUG,
format='%(levelname)s:%(module)s.%(funcName)s: %(message)s')
width, height = 1024, 768
model_matrix = np.identity(4)
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
for i in range(64):
sample = glm.vec3(np.random.uniform((-1, -1, 0), (1, 1, 1), (3, )))
sample = glm.normalize(sample)
sample *= np.random.uniform(0, 1)
scale = i / 64
# scale samples s.t. they are more aligned to center of kernel
scale = glm.mix(0.1, 1.0, scale * scale)
sample *= scale
ssaoKernel.append(sample)
with program.use(ssao_program):
for i, sample in enumerate(ssaoKernel):
name = "samples[{}]".format(i)
location = glGetUniformLocation(ssao_program, name)
program.set_uniform(ssao_program, name, sample)
noise_data = np.random.uniform((-1, -1, 0), (1, 1, 0), (4, 4, 3))
noise_texture = glGenTextures(1)
glBindTexture(GL_TEXTURE_2D, noise_texture)
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB32F, 4, 4, 0, GL_RGB, GL_FLOAT,
noise_data)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT)
glBindTexture(GL_TEXTURE_2D, 0)
# create ssao fbo
# ---------------
ssao_fbo = glGenFramebuffers(1)
def texture(tex, rect, shuffle=(0, 1, 2, -1)):
# create shader program
debug_quad_program = program.create(
*glsl.read('debug_quad.vs', 'shuffle.fs'))
# setup program uniforms
with program.use(debug_quad_program):
program.set_uniform(debug_quad_program, 'projectionMatrix', np.eye(4))
program.set_uniform(debug_quad_program, 'viewMatrix', np.eye(4))
program.set_uniform(debug_quad_program, 'modelMatrix', np.eye(4))
program.set_uniform(debug_quad_program, 'tex', 0)
program.set_uniform(debug_quad_program, 'shuffle.red', shuffle[0])
program.set_uniform(debug_quad_program, 'shuffle.green', shuffle[1])
program.set_uniform(debug_quad_program, 'shuffle.blue', shuffle[2])
program.set_uniform(debug_quad_program, 'shuffle.alpha', shuffle[3])
# draw texture quad
glViewport(*rect)
with program.use(debug_quad_program):
glActiveTexture(GL_TEXTURE0 + 0)
glBindTexture(GL_TEXTURE_2D, tex)
quad(debug_quad_program)
glBindTexture(GL_TEXTURE_2D, 0)
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()
def draw_scene(prog, projection_matrix, view_matrix):
"""Draw scen with a shader program"""
program.set_uniform(prog, 'projectionMatrix', projection_matrix)
program.set_uniform(prog, 'viewMatrix', view_matrix)
camera_pos = glm.inverse(view_matrix)[3].xyz
program.set_uniform(prog, 'cameraPos', camera_pos)
model_matrix = glm.translate(glm.mat4(1), (-1, 0.5, 0))
normal_matrix = glm.mat3(glm.transpose(glm.inverse(model_matrix)))
program.set_uniform(prog, 'modelMatrix', model_matrix)
program.set_uniform(prog, 'normalMatrix', normal_matrix)
imdraw.cube(prog)
model_matrix = glm.translate(glm.mat4(1), (1, 0, 0))
normal_matrix = glm.mat3(glm.transpose(glm.inverse(model_matrix)))
program.set_uniform(prog, 'modelMatrix', model_matrix)
program.set_uniform(prog, 'normalMatrix', normal_matrix)
imdraw.sphere(prog)
model_matrix = glm.mat4(1)
normal_matrix = glm.mat3(glm.transpose(glm.inverse(model_matrix)))
program.set_uniform(prog, 'modelMatrix', model_matrix)
program.set_uniform(prog, 'normalMatrix', normal_matrix)
imdraw.plane(prog)
# create rbo
capture_rbo = glGenRenderbuffers(1)
glBindRenderbuffer(GL_RENDERBUFFER, capture_rbo)
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, env_width,
env_height)
glBindRenderbuffer(GL_RENDERBUFFER, 0)
# create fbo
capture_fbo = glGenFramebuffers(1)
# draw environment map to skybox
glViewport(0, 0, env_width, env_height)
glActiveTexture(GL_TEXTURE0)
glBindTexture(GL_TEXTURE_2D, environment_tex)
with program.use(equirectangular_to_cubemap_program):
program.set_uniform(equirectangular_to_cubemap_program,
"equirectangularMap", 0)
program.set_uniform(equirectangular_to_cubemap_program,
"projectionMatrix", capture_projection)
with fbo.bind(capture_fbo):
for i in range(6):
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_CUBE_MAP_POSITIVE_X + i,
env_cubemap, 0)
program.set_uniform(equirectangular_to_cubemap_program,
"viewMatrix", capture_views[i])
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
imdraw.cube(equirectangular_to_cubemap_program, flip=True)
# Image based lighting
# --------------------
env_height)
glBindRenderbuffer(GL_RENDERBUFFER, 0)
# create cubemap fbo
capture_fbo = glGenFramebuffers(1)
# attach depth buffer
with fbo.bind(capture_fbo):
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, capture_rbo)
# draw environment map to each cubemap side
glViewport(0, 0, env_width, env_height)
glActiveTexture(GL_TEXTURE0)
glBindTexture(GL_TEXTURE_2D, environment_tex)
with program.use(equirectangular_to_cubemap_program):
program.set_uniform(equirectangular_to_cubemap_program,
"equirectangularMap", 0)
program.set_uniform(equirectangular_to_cubemap_program,
"projectionMatrix", capture_projection)
with fbo.bind(capture_fbo):
for i in range(6):
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_CUBE_MAP_POSITIVE_X + i,
env_cubemap, 0)
program.set_uniform(equirectangular_to_cubemap_program,
"viewMatrix", capture_views[i])
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
imdraw.cube(equirectangular_to_cubemap_program, flip=True)
## setup skybox drawing
skybox_program = program.create(*glsl.read('skybox'))
def cubemap(tex, rect, projection, view, LOD=None, shuffle=(0, 1, 2, 3)):
prog = create_program()
glViewport(*rect)
with program.use(prog):
glActiveTexture(GL_TEXTURE0 + 0)
glBindTexture(GL_TEXTURE_CUBE_MAP, tex)
program.set_uniform(prog, "projectionMatrix", projection)
program.set_uniform(prog, "viewMatrix", view)
program.set_uniform(prog, "modelMatrix",
glm.scale(glm.mat4(1), (1.1, 1.1, 1.1)))
program.set_uniform(prog, "cubeMap", 0)
program.set_uniform(prog, "useLOD", LOD is not None)
program.set_uniform(prog, "LOD", LOD or 0.0)
program.set_uniform(prog, 'shuffle.red', shuffle[0])
program.set_uniform(prog, 'shuffle.green', shuffle[1])
program.set_uniform(prog, 'shuffle.blue', shuffle[2])
program.set_uniform(prog, 'shuffle.alpha', shuffle[3])
cube(prog)
glBindTexture(GL_TEXTURE_CUBE_MAP, 0)
#version 330 core
uniform mat4 projection;
uniform mat4 view;
uniform mat4 model;
layout (location = 0) in vec3 position;
void main(){
gl_Position = projection * view * model * vec4(position, 1.0);
}
""", """
#version 330 core
out vec4 FragColor;
void main(){
FragColor = vec4(1,1,1,1);
}
""")
while not window.should_close():
glViewport(0, 0, window.width, window.height)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
with program.use(prog):
program.set_uniform(prog, 'projection', window.projection_matrix)
program.set_uniform(prog, 'view', window.view_matrix)
program.set_uniform(prog, 'model', np.eye(4))
imdraw.cube(prog)
# draw grid
window.swap_buffers()
GLFWViewer.poll_events()
shadowTransforms.append(
shadowProj *
glm.lookAt(lightPos, lightPos + glm.vec3(0.0, 0.0, 1.0),
glm.vec3(0.0, -1.0, 0.0)))
shadowTransforms.append(
shadowProj *
glm.lookAt(lightPos, lightPos + glm.vec3(0.0, 0.0, -1.0),
glm.vec3(0.0, -1.0, 0.0)))
shadowTransforms = np.array([np.array(m) for m in shadowTransforms])
glViewport(0, 0, shadow_width, shadow_height)
with fbo.bind(shadow_depth_fbo), program.use(
point_shadow_program) as prog:
glClear(GL_DEPTH_BUFFER_BIT)
for i in range(6):
program.set_uniform(prog, "shadowMatrices[{}]".format(i),
shadowTransforms[i])
program.set_uniform(prog, 'farPlane', far_plane)
program.set_uniform(prog, 'lightPos', lightPos)
# draw scene
program.set_uniform(prog, 'model',
glm.translate(glm.mat4(1), (-1, 0.5, -1)))
imdraw.cube(prog)
program.set_uniform(prog, 'model',
glm.translate(glm.mat4(1), (1, 0.5, -1)))
imdraw.cube(prog)
program.set_uniform(prog, 'model',
glm.translate(glm.mat4(1), (1, 0.5, 1)))
imdraw.sphere(prog)
program.set_uniform(prog, 'model',
glm.translate(glm.mat4(1), (-1, 0.5, 1)))