def main():
global lastFrame, planeVAO, planeVBO
# Init GLFW
glfw.setErrorCallback(error_callback)
glfw.init()
glfw.windowHint(glfw.CONTEXT_VERSION_MAJOR, 3)
glfw.windowHint(glfw.CONTEXT_VERSION_MINOR, 3)
glfw.windowHint(glfw.OPENGL_PROFILE, glfw.OPENGL_CORE_PROFILE)
# glfw.windowHint(glfw.RESIZABLE, gl.FALSE)
glfw.windowHint(glfw.OPENGL_FORWARD_COMPAT, 1)
window = glfw.createWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL")
if window is None:
print('could not open window.')
glfw.terminate()
sys.exit()
inputMap = InputMap()
window.makeContextCurrent()
window.setKeyCallback(inputMap.key_callback)
window.setCursorPosCallback(inputMap.mouse_callback)
#window.setScrollCallback(inputMap.scroll_callback)
window.setInputMode(glfw.CURSOR, glfw.CURSOR_DISABLED)
# some versions of glfw cause an opengl error when creating a window, make sure that's ignored.
gl.init()
err = gl.getError()
if err:
print("WINDOW OPEN ERROR:", err)
# Define the viewport dimensions
VP_WIDTH, VP_HEIGHT = window.getFramebufferSize()
gl.viewport(0, 0, VP_WIDTH, VP_HEIGHT)
# Setup some OpenGL options
gl.enable(gl.DEPTH_TEST);
# Setup and compile our shaders
shaderProgram = Shader(SHADOW_MAPPING_VERT, SHADOW_MAPPING_FRAG);
simpleDepthShader = Shader(SHADOW_MAPPING_DEPTH_VERT, SHADOW_MAPPING_DEPTH_FRAG);
debugDepthQuad = Shader(DEBUG_QUAD_VERT, DEBUG_QUAD_FRAG);
# Set texture samples
shaderProgram.use();
# shaderProgram.uniforms.diffuseTexture = 0
# shaderProgram.uniforms.shadowMap = 1
# print(dir(Vertex))
planeVertices = (Vertex * 6)(
# Positions # Normals # Texture Coords
(( 25.0, -0.5, 25.0), (0.0, 1.0, 0.0), (25.0, 0.0)),
((-25.0, -0.5, -25.0), (0.0, 1.0, 0.0), ( 0.0, 25.0)),
((-25.0, -0.5, 25.0), (0.0, 1.0, 0.0), ( 0.0, 0.0)),
(( 25.0, -0.5, 25.0), (0.0, 1.0, 0.0), (25.0, 0.0)),
(( 25.0, -0.5, -25.0), (0.0, 1.0, 0.0), (25.0, 25.0)),
((-25.0, -0.5, -25.0), (0.0, 1.0, 0.0), ( 0.0, 25.0))
)
# Setup plane VAO
planeVAO = gl.genVertexArrays(1)[0]
planeVBO = gl.genBuffers(1)[0]
gl.bindVertexArray(planeVAO)
gl.bindBuffer(gl.ARRAY_BUFFER, planeVBO)
gl.bufferData(gl.ARRAY_BUFFER, bytes(planeVertices), gl.STATIC_DRAW)
gl.enableVertexAttribArray(0)
gl.vertexAttribPointer(0, 3, gl.FLOAT, gl.FALSE, sizeof(Vertex), Vertex.position.offset)
gl.enableVertexAttribArray(1)
gl.vertexAttribPointer(1, 3, gl.FLOAT, gl.FALSE, sizeof(Vertex), Vertex.normal.offset)
gl.enableVertexAttribArray(2)
gl.vertexAttribPointer(2, 2, gl.FLOAT, gl.FALSE, sizeof(Vertex), Vertex.texcoord.offset)
gl.bindVertexArray(0)
# Light source
lightPos = Vec3(-2.0, 4.0, -1.0)
# Load textures
woodTexture = load_texture("learningopengl/resources/textures/wood.png")
# Configure depth map FBO
SHADOW_WIDTH = SHADOW_HEIGHT = 4096
depthMapFBO = gl.genFramebuffers(1)[0]
# - Create depth texture
depthMap = gl.genTextures(1)[0]
gl.bindTexture(gl.TEXTURE_2D, depthMap)
gl.texImage2D(gl.TEXTURE_2D, 0, gl.DEPTH_COMPONENT, SHADOW_WIDTH, SHADOW_HEIGHT, 0, gl.DEPTH_COMPONENT, gl.FLOAT, None)
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_BORDER)
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_BORDER)
borderColor = Vec4(1.0, 1.0, 1.0, 1.0)
gl.texParameterfv(gl.TEXTURE_2D, gl.TEXTURE_BORDER_COLOR, borderColor)
gl.bindFramebuffer(gl.FRAMEBUFFER, depthMapFBO)
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.TEXTURE_2D, depthMap, 0)
gl.drawBuffer(gl.NONE)
gl.readBuffer(gl.NONE);
gl.bindFramebuffer(gl.FRAMEBUFFER, 0);
gl.clearColor(0.1, 0.1, 0.1, 1.0)
# Game loop
while not window.shouldClose():
# Set frame time
currentFrame = time.perf_counter()
deltaTime = currentFrame - lastFrame;
lastFrame = currentFrame;
# Check and call events
inputMap.begin_frame()
glfw.pollEvents()
input = inputMap.get_input()
camera.processInput(input, 1.0/30.0)
# Change light position over time
lightPos.z = math.cos(time.perf_counter()) * 2.0
# 1. Render depth of scene to texture (from light's perspective)
# - Get light projection/view matrix.
near_plane = 1.0
far_plane = 7.5
lightProjection = Mat4.Ortho(-10.0, 10.0, -10.0, 10.0, near_plane, far_plane)
# lightProjection = glm::perspective(45.0f, (GLfloat)SHADOW_WIDTH / (GLfloat)SHADOW_HEIGHT, near_plane, far_plane); // Note that if you use a perspective projection matrix you'll have to change the light position as the current light position isn't enough to reflect the whole scene.
lightView = Mat4.LookAt(lightPos, Vec3(0.0, 0.0, 0.0), Vec3(1.0, 1.0, 1.0))
lightSpaceMatrix = lightProjection * lightView;
# - now render scene from light's point of view
simpleDepthShader.use()
simpleDepthShader.uniforms.lightSpaceMatrix = lightSpaceMatrix
# glUniformMatrix4fv(glGetUniformLocation(simpleDepthShader.Program, "lightSpaceMatrix"), 1, GL_FALSE, glm::value_ptr(lightSpaceMatrix));
gl.viewport(0, 0, SHADOW_WIDTH, SHADOW_HEIGHT)
gl.bindFramebuffer(gl.FRAMEBUFFER, depthMapFBO)
gl.clear(gl.DEPTH_BUFFER_BIT);
RenderScene(simpleDepthShader);
gl.bindFramebuffer(gl.FRAMEBUFFER, 0)
# 2. Render scene as normal
gl.viewport(0, 0, VP_WIDTH, VP_HEIGHT)
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
shaderProgram.use()
# TODO: use zoon
projection = Mat4.Perspective(45.0, float(SCR_WIDTH) / float(SCR_HEIGHT), 0.1, 100.0)
view = camera.getViewMatrix()
shaderProgram.uniforms.projection = projection
shaderProgram.uniforms.view = view
shaderProgram.uniforms.lightPos = lightPos
shaderProgram.uniforms.viewPos = camera.position
shaderProgram.uniforms.lightSpaceMatrix = lightSpaceMatrix
shaderProgram.uniforms.shadows = 1
shaderProgram.uniforms.diffuseTexture = woodTexture
shaderProgram.uniforms.shadowMap = depthMap
RenderScene(shaderProgram)
# 3. DEBUG: visualize depth map by rendering it to plane
debugDepthQuad.use()
# these are not actually used.
#debugDepthQuad.uniforms.near_plane = near_plane
#debugDepthQuad.uniforms.far_plane = far_plane
debugDepthQuad.uniforms.depthMap = depthMap
# RenderQuad() # uncomment this line to see depth map
# Swap the buffers
window.swapBuffers()
return 0
def main():
glfw.setErrorCallback(error_callback)
glfw.init()
glfw.windowHint(glfw.CONTEXT_VERSION_MAJOR, 3)
glfw.windowHint(glfw.CONTEXT_VERSION_MINOR, 3)
glfw.windowHint(glfw.OPENGL_PROFILE, glfw.OPENGL_CORE_PROFILE)
# glfw.windowHint(glfw.RESIZABLE, gl.FALSE)
glfw.windowHint(glfw.OPENGL_FORWARD_COMPAT, 1)
if ENABLE_MULTISAMPLE:
glfw.windowHint(glfw.SAMPLES, 4)
window = glfw.createWindow(WIDTH, HEIGHT, "LearnOpenGL")
if window is None:
print('could not open window.')
glfw.terminate()
sys.exit()
window.makeContextCurrent()
# window.setInputMode(glfw.CURSOR, glfw.CURSOR_DISABLED)
window.setKeyCallback(key_callback)
gl.init()
err = gl.getError()
if err:
print("WINDOW OPEN ERROR:", err)
framebuffer_width, framebuffer_height = window.getFramebufferSize()
# Framebuffers
framebuffer = gl.genFramebuffers(1)[0]
gl.bindFramebuffer(gl.FRAMEBUFFER, framebuffer);
# Create a color attachment texture
textureColorbuffer = generateAttachmentTexture(gl.RGB, framebuffer_width, framebuffer_height);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, textureColorbuffer, 0)
# set up the position buffer
gPosition = gl.genTextures(1)[0]
gl.bindTexture(gl.TEXTURE_2D, gPosition)
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGB16F, framebuffer_width, framebuffer_height, 0, gl.RGB, gl.FLOAT, None)
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT1, gl.TEXTURE_2D, gPosition, 0)
# set up the normal buffer
gNormal = gl.genTextures(1)[0]
gl.bindTexture(gl.TEXTURE_2D, gNormal)
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGB16F, framebuffer_width, framebuffer_height, 0, gl.RGB, gl.FLOAT, None)
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT2, gl.TEXTURE_2D, gNormal, 0)
gLight = gl.genTextures(1)[0]
gl.bindTexture(gl.TEXTURE_2D, gLight)
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGB16F, framebuffer_width, framebuffer_height, 0, gl.RGB, gl.FLOAT, None)
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT3, gl.TEXTURE_2D, gLight, 0)
# - Tell OpenGL which color attachments we'll use (of this framebuffer) for rendering
attachments = [gl.COLOR_ATTACHMENT0, gl.COLOR_ATTACHMENT1, gl.COLOR_ATTACHMENT2]
gl.drawBuffers(attachments)
gDepth = gl.genTextures(1)[0]
gl.bindTexture(gl.TEXTURE_2D, gDepth)
gl.texImage2D(gl.TEXTURE_2D, 0, gl.DEPTH24_STENCIL8, framebuffer_width, framebuffer_height, 0, gl.DEPTH_STENCIL, gl.UNSIGNED_INT_24_8, None)
# gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGB16F, framebuffer_width, framebuffer_height, 0, gl.RGB, gl.FLOAT, None)
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.DEPTH_STENCIL_ATTACHMENT, gl.TEXTURE_2D, gDepth, 0)
# Create a renderbuffer object for depth and stencil attachment (we won't be sampling these)
# rbo = gl.genRenderbuffers(1)[0]
# gl.bindRenderbuffer(gl.RENDERBUFFER, rbo)
# gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH24_STENCIL8, framebuffer_width, framebuffer_height); # Use a single renderbuffer object for both a depth AND stencil buffer.
# gl.bindRenderbuffer(gl.RENDERBUFFER, 0);
# gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.DEPTH_STENCIL_ATTACHMENT, gl.RENDERBUFFER, rbo) # Now actually attach it
# Now that we actually created the framebuffer and added all attachments we want to check if it is actually complete now
if gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE:
print("ERROR::FRAMEBUFFER:: Framebuffer is not complete!")
gl.bindFramebuffer(gl.FRAMEBUFFER, 0)
deferred_textures = {
'screenTexture': textureColorbuffer,
'normalTexture': gNormal,
'positionTexture': gPosition,
'lightTexture': gLight,
'depthTexture': gDepth
}
scene = Scene()
camera = Camera(scene=scene)
quad_scene = Scene()
quad_camera = Camera(scene=quad_scene)
light_scene = Scene()
light_camera = Camera(scene=light_scene, clear=0)
light_camera.clear = gl.COLOR_BUFFER_BIT
light_camera.clear_color = (0.0, 0.0, 0.0, 0.0)
light_camera.projection_matrix = camera.projection_matrix = Mat4.Perspective(45.0, framebuffer_width/framebuffer_height, 0.1, 100.0)
light_camera.view_matrix = camera.view_matrix = Mat4.LookAt(Vec3(math.cos(time.clock()), 1.0, math.sin(time.clock())) *15.0, Vec3(0.0, 0.0, 0.0), Vec3(0.0, 1.0, 0.0))
# light volume model
light_volume_data = objloader.load_obj(os.path.join("springtangent-model-files", "lightsphere", "lightsphere.obj"), calculate_normals=True)
light_volume_model = Model.FromJSON(light_volume_data, PointLightInstanceData, PlateInstance)
# other models
armored_plate_data = objloader.load_obj(os.path.join("springtangent-model-files", "armored_plate.75.75.decimation_test7.obj"), calculate_normals=True)
armored_plate_model = Model.FromJSON(armored_plate_data, InstanceData, PlateInstance)
plane_plate_data = objloader.load_obj(os.path.join("springtangent-model-files", "plane_plate.75.75.decimation_test.00.obj"), calculate_normals=True)
plane_plate_model = Model.FromJSON(plane_plate_data, InstanceData, PlateInstance)
angled_plate_data = objloader.load_obj(os.path.join("springtangent-model-files", "angled_plate_plane.75.25..25.decimated.obj"), calculate_normals=True)
angled_plate_model = Model.FromJSON(angled_plate_data, InstanceData, PlateInstance)
angled_to_rounded_data = objloader.load_obj(os.path.join("springtangent-model-files", "angled_to_round_adapter.75.25.25", "angled_to_rounded_adapter.75.25.25.decimated.obj"), calculate_normals=True)
angled_to_rounded_model = Model.FromJSON(angled_to_rounded_data, InstanceData, PlateInstance)
models = [armored_plate_model, plane_plate_model, angled_plate_model, angled_to_rounded_model]
deferred_shader = ShaderProgram(GBUFFER_VERT, GBUFFER_FRAG)
deferred_light_shader = ShaderProgram(GBUFFER_LIGHT_VERT, GBUFFER_LIGHT_FRAG)
for mesh in light_volume_model.meshes:
mesh.shader = deferred_light_shader
mesh.material = deferred_textures
# replace the shader with the deferred shader in all meshes
for model in models:
for mesh in model.meshes:
mesh.shader = deferred_shader
# set up the data for the instances.
# 30 x 30 array of tiles, which are randomly selected among the above models
n = 30
instances = {}
for i in range(n):
for j in range(n):
r = random.choice(range(4))
transform = Mat4.Translation(Vec3((i-n//2) * 2, 0.0, (j-n//2) * 2)) * Mat4.Rotation(math.pi/2.0 * r, Vec3(0.0, 1.0, 0.0))
instance = scene.add(random.choice(models), InstanceData(transform))
instance.r = r
instances[i,j] = instance
nlights = 400
for i in range(nlights):
transform = Mat4.Translation(Vec3(random.uniform(-n/2, n/2), random.uniform(-1.0, 1.0), random.uniform(-n/2,n/2))) * Mat4.Scale(random.uniform(2.0, 10.0))
instance = light_scene.add(light_volume_model, PointLightInstanceData(transform, diffuse=Vec3(1.0, 1.0, 1.0), linear_attenuation=0.1, quadratic_attenutation=0.01))
# full screen rectangle
class QuadVert(Structure):
_fields_ = [
('position', Vec2),
('texcoord', Vec2)
]
quad_points = Vector(QuadVert)
quad_points.append(QuadVert(Vec2(-1.0, 1.0), Vec2(0.0, 1.0)))
quad_points.append(QuadVert(Vec2(-1.0, -1.0), Vec2(0.0, 0.0)))
quad_points.append(QuadVert(Vec2( 1.0, -1.0), Vec2(1.0, 0.0)))
quad_points.append(QuadVert(Vec2( 1.0, 1.0), Vec2(1.0, 1.0)))
quad_indices = Vector(c_ubyte)
quad_indices.append(0)
quad_indices.append(1)
quad_indices.append(2)
quad_indices.append(0)
quad_indices.append(2)
quad_indices.append(3)
quad_attribs = BufferAttribs(sizeof(QuadVert))
quad_attribs.add(BufferAttribs.POSITION_INDEX, 2, gl.FLOAT, gl.FALSE, QuadVert.position.offset)
quad_attribs.add(BufferAttribs.TEXCOORD_INDEX, 2, gl.FLOAT, gl.FALSE, QuadVert.texcoord.offset)
quad_shader = ShaderProgram(FRAMEBUFFER_VERT, FRAMEBUFFER_FRAG)
quad_draw_call = DrawCall(gl.UNSIGNED_BYTE, gl.TRIANGLES, 0, len(quad_indices))
quad_material = deferred_textures
quad_mesh = Mesh(quad_shader, quad_draw_call, quad_material)
quad_model = Model(quad_indices.get_data(), quad_points.get_data(), quad_attribs, [quad_mesh], InstanceData, PlateInstance)
# quad_instances = ModelInstances(quad_model)
quad_instance = quad_scene.add(quad_model, InstanceData(Mat4.Identity()))
gl.enable(gl.MULTISAMPLE)
t0 = time.perf_counter()
frames = 0
while not window.shouldClose():
glfw.pollEvents()
t = time.perf_counter()
# render scene to gbuffer
gl.bindFramebuffer(gl.FRAMEBUFFER, framebuffer)
gl.enable(gl.DEPTH_TEST)
gl.depthFunc(gl.LEQUAL)
gl.enable(gl.CULL_FACE)
gl.cullFace(gl.BACK)
# set up gbuffer for writing
attachments = [gl.COLOR_ATTACHMENT0, gl.COLOR_ATTACHMENT1, gl.COLOR_ATTACHMENT2]
gl.drawBuffers(attachments)
framebuffer_width, framebuffer_height = window.getFramebufferSize()
light_camera.view_matrix = camera.view_matrix = Mat4.LookAt(Vec3(math.cos(time.clock() * 0.1), 1.0, math.sin(time.clock() * 0.1)) *15.0, Vec3(0.0, 0.0, 0.0), Vec3(0.0, 1.0, 0.0))
viewport = (0, 0, framebuffer_width, framebuffer_height)
camera.render_to_viewport(viewport)
# render lights to gbuffer
gl.drawBuffer(gl.COLOR_ATTACHMENT3)
gl.depthFunc(gl.GREATER)
gl.enable(gl.CULL_FACE)
gl.cullFace(gl.FRONT)
gl.enable(gl.BLEND)
gl.blendEquation(gl.FUNC_ADD)
gl.blendFunc(gl.ONE, gl.ONE)
light_camera.render_to_viewport(viewport)
err = gl.getError()
if err:
print("ERROR:", err)
if TEST_ANIMATION:
for i in range(n):
for j in range(n):
instance = instances[i,j]
enabled = True # math.sin(i+j+t*10.0) > -0.8
# instance.set_enabled(enabled)
if enabled:
y = (math.sin(t+i) + math.cos(t+j)) * 0.25
transform = Mat4.Translation(Vec3((i-n//2) * 2, y, (j-n//2) * 2)) * Mat4.Rotation(math.pi/2.0 * instance.r, Vec3(0.0, 1.0, 0.0))
instance.model_matrix = transform
# render quad with texture
gl.bindFramebuffer(gl.FRAMEBUFFER, 0)
gl.disable(gl.BLEND)
gl.disable(gl.CULL_FACE)
gl.disable(gl.DEPTH_TEST) # We don't care about depth information when rendering a single quad
quad_camera.clear_color = (1.0, 1.0, 1.0, 1.0)
quad_camera.clear = gl.COLOR_BUFFER_BIT
quad_camera.render_to_viewport(viewport)
scene.update_instances()
quad_scene.update_instances()
light_scene.update_instances()
window.swapBuffers()
frames += 1
if not frames % 100:
print("FRAME RATE:", float(frames)/(time.perf_counter() - t0))