glDebugMessageCallback(GLDEBUGPROC(debug_message_callback), None)
# set resizing callback function
# glfw.set_framebuffer_size_callback(theWindow, window_resize_callback)
glfw.set_key_callback(theWindow, window_keypress_callback)
# disable cursor
glfw.set_input_mode(theWindow, glfw.CURSOR, glfw.CURSOR_DISABLED)
glfw.set_cursor_pos_callback(theWindow, window_cursor_callback)
# initialize cursor position
cursorPos = glfw.get_cursor_pos(theWindow)
glfw.set_scroll_callback(theWindow, window_scroll_callback)
vbo = VBO(vertices, 'GL_STATIC_DRAW')
vbo.create_buffers()
vao = glGenVertexArrays(1)
glBindVertexArray(vao)
vbo.bind()
vbo.copy_data()
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * ctypes.sizeof(ctypes.c_float), ctypes.c_void_p(0))
glEnableVertexAttribArray(0)
glBindVertexArray(0)
# compile program
renderProgram = GLProgram(rayTracingVertexShaderSource, rayTracingFragmentShaderSource)
renderProgram.compile_and_link()
uniformInfos = [
('backColor', 'vec3f'),
('ambientColor', 'vec3f'),
glDebugMessageCallback(GLDEBUGPROC(debug_message_callback), None)
# set resizing callback function
# glfw.set_framebuffer_size_callback(theWindow, window_resize_callback)
glfw.set_key_callback(theWindow, window_keypress_callback)
# disable cursor
glfw.set_input_mode(theWindow, glfw.CURSOR, glfw.CURSOR_DISABLED)
glfw.set_cursor_pos_callback(theWindow, window_cursor_callback)
# initialize cursor position
cursorPos = glfw.get_cursor_pos(theWindow)
glfw.set_scroll_callback(theWindow, window_scroll_callback)
sphereDataVBO = VBO(sphereData, usage='GL_STATIC_DRAW')
sphereDataVBO.create_buffers()
sphereVAO = glGenVertexArrays(1)
glBindVertexArray(sphereVAO)
sphereDataVBO.bind()
sphereDataVBO.copy_data()
glVertexAttribPointer(0, 3, GL_FLOAT,
GL_FALSE, 6 * ctypes.sizeof(ctypes.c_float),
ctypes.c_void_p(0))
glEnableVertexAttribArray(0)
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE,
6 * ctypes.sizeof(ctypes.c_float),
ctypes.c_void_p(3 * ctypes.sizeof(ctypes.c_float)))
glEnableVertexAttribArray(1)
sphereDataVBO.unbind()
'Hello Triangle', None, None)
# make window the current context
glfw.make_context_current(theWindow)
if platform.system().lower() != 'darwin':
# enable debug output
# doesn't seem to work on macOS
glEnable(GL_DEBUG_OUTPUT)
glDebugMessageCallback(GLDEBUGPROC(debug_message_callback), None)
# set resizing callback function
glfw.set_framebuffer_size_callback(theWindow, window_resize_callback)
# create VBO to store vertices
verticesVBO = VBO(triangleVertices, usage='GL_STATIC_DRAW')
verticesVBO.create_buffers()
# create VAO to describe array information
triangleVAO = glGenVertexArrays(1)
# bind VAO
glBindVertexArray(triangleVAO)
# bind VBO
verticesVBO.bind()
# buffer data into OpenGL
verticesVBO.copy_data()
# configure the fist 3-vector (pos)
# arguments: index, size, type, normalized, stride, pointer
# the stride is 6 * 4 because there are six floats per vertex, and the size of
glDebugMessageCallback(GLDEBUGPROC(debug_message_callback), None)
# set resizing callback function
# glfw.set_framebuffer_size_callback(theWindow, window_resize_callback)
glfw.set_key_callback(theWindow, window_keypress_callback)
# disable cursor
glfw.set_input_mode(theWindow, glfw.CURSOR, glfw.CURSOR_DISABLED)
glfw.set_cursor_pos_callback(theWindow, window_cursor_callback)
# initialize cursor position
cursorPos = glfw.get_cursor_pos(theWindow)
glfw.set_scroll_callback(theWindow, window_scroll_callback)
vertexVBO = VBO(vertices, usage='GL_STATIC_DRAW')
vertexVBO.create_buffers()
textureVBO = VBO(textureVertices, usage='GL_STATIC_DRAW')
textureVBO.create_buffers()
frameVAO = glGenVertexArrays(1)
glBindVertexArray(frameVAO)
vertexVBO.bind()
vertexVBO.copy_data()
glVertexAttribPointer(0, 3, GL_FLOAT,
GL_FALSE, 3 * ctypes.sizeof(ctypes.c_float),
ctypes.c_void_p(0))
glEnableVertexAttribArray(0)
glBindVertexArray(0)
textureVAO = glGenVertexArrays(1)
glBindVertexArray(textureVAO)
# set resizing callback function
# glfw.set_framebuffer_size_callback(theWindow, window_resize_callback)
glfw.set_key_callback(theWindow, window_keypress_callback)
# disable cursor
glfw.set_input_mode(theWindow, glfw.CURSOR, glfw.CURSOR_DISABLED)
glfw.set_cursor_pos_callback(theWindow, window_cursor_callback)
# initialize cursor position
cursorPos = glfw.get_cursor_pos(theWindow)
glfw.set_scroll_callback(theWindow, window_scroll_callback)
# create VBOs to store vertices, normals and elements
cubeDataVBO = VBO(cubeData, usage='GL_STATIC_DRAW')
cubeDataVBO.create_buffers()
sphereDataVBO = VBO(sphereData, usage='GL_STATIC_DRAW')
sphereDataVBO.create_buffers()
# create VAO to describe array information
triangleVAO, sphereVAO = glGenVertexArrays(2)
# bind VAO
glBindVertexArray(triangleVAO)
# bind data VBO
cubeDataVBO.bind()
cubeDataVBO.copy_data()
glVertexAttribPointer(0, 3, GL_FLOAT,
GL_FALSE, 6 * ctypes.sizeof(ctypes.c_float),
ctypes.c_void_p(0))
def image_server(evtQueue, resultQueue):
# resource-taking objects
resObjs = []
# initialize glfw
glfw.init()
# set glfw config
glfw.window_hint(glfw.CONTEXT_VERSION_MINOR, 3)
glfw.window_hint(glfw.CONTEXT_VERSION_MAJOR, 3)
glfw.window_hint(glfw.OPENGL_PROFILE, glfw.OPENGL_CORE_PROFILE)
glfw.window_hint(glfw.RESIZABLE, GL_FALSE)
if pyPlatform.system().lower() == 'darwin':
glfw.window_hint(glfw.OPENGL_FORWARD_COMPAT, GL_TRUE)
# create window
theWindow = glfw.create_window(windowSize[0], windowSize[1], 'Spherical Projection', None, None)
# make window the current context
glfw.make_context_current(theWindow)
# enable z-buffer
glEnable(GL_DEPTH_TEST)
# set resizing callback function
# glfw.set_framebuffer_size_callback(theWindow, window_resize_callback)
#glfw.set_key_callback(theWindow, window_keypress_callback)
# disable cursor
#glfw.set_input_mode(theWindow, glfw.CURSOR, glfw.CURSOR_DISABLED)
#glfw.set_cursor_pos_callback(theWindow, window_cursor_callback)
# initialize cursor position
cursorPos = glfw.get_cursor_pos(theWindow)
# glfw.set_scroll_callback(theWindow, window_scroll_callback)
vbo = VBO(vertices, 'GL_STATIC_DRAW')
vbo.create_buffers()
resObjs.append(vbo)
vao = glGenVertexArrays(1)
glBindVertexArray(vao)
vbo.bind()
vbo.copy_data()
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * ctypes.sizeof(ctypes.c_float), ctypes.c_void_p(0))
glEnableVertexAttribArray(0)
glBindVertexArray(0)
# compile program
renderProgram = GLProgram(rayTracingVertexShaderSource, rayTracingFragmentShaderSource)
renderProgram.compile_and_link()
uniformInfos = [
('backColor', 'vec3f'),
('ambientColor', 'vec3f'),
('o_c', 'vec3f'),
('o_p', 'vec3f'),
('x_c', 'vec3f'),
('y_c', 'vec3f'),
('x_p', 'vec3f'),
('y_p', 'vec3f'),
('c_c', 'vec3f'),
('c_p', 'vec3f'),
('winSize', 'vec2f')
]
uniforms = create_uniform(renderProgram.get_program_id(), uniformInfos)
# keep rendering until the window should be closed
while not glfw.window_should_close(theWindow):
# set background color
glClearColor(*windowBackgroundColor)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
renderProgram.use()
# update uniforms
o_c, c_c, x_c, y_c = get_camera_vectors(camera)
o_p, c_p, x_p, y_p = get_camera_vectors(projector)
uniforms['o_c'].update(o_c)
uniforms['x_c'].update(x_c)
uniforms['y_c'].update(y_c)
uniforms['c_c'].update(c_c)
uniforms['o_p'].update(o_p)
uniforms['x_p'].update(x_p)
uniforms['y_p'].update(y_p)
uniforms['c_p'].update(c_p)
uniforms['backColor'].update(backColor)
uniforms['ambientColor'].update(ambientColor)
uniforms['winSize'].update(windowSize.astype(np.float32))
try:
newImage = evtQueue.get(timeout=0.05)
except Exception as e:
# tell glfw to poll and process window events
glfw.poll_events()
# swap frame buffer
glfw.swap_buffers(theWindow)
continue
texture = create_texture(newImage)
glBindVertexArray(vao)
glActiveTexture(GL_TEXTURE0)
texture.bind()
glDrawArrays(GL_TRIANGLES, 0, 6)
texture.unbind()
glBindVertexArray(0)
texture.delete()
# respond key press
keyboard_respond_func()
# tell glfw to poll and process window events
glfw.poll_events()
# swap frame buffer
glfw.swap_buffers(theWindow)
result = get_screenshot(windowSize)
resultQueue.put(result)
for obj in resObjs:
obj.delete()
# terminate glfw
glfw.terminate()
glDebugMessageCallback(GLDEBUGPROC(debug_message_callback), None)
# set resizing callback function
# glfw.set_framebuffer_size_callback(theWindow, window_resize_callback)
glfw.set_key_callback(theWindow, window_keypress_callback)
# disable cursor
glfw.set_input_mode(theWindow, glfw.CURSOR, glfw.CURSOR_DISABLED)
glfw.set_cursor_pos_callback(theWindow, window_cursor_callback)
# initialize cursor position
cursorPos = glfw.get_cursor_pos(theWindow)
glfw.set_scroll_callback(theWindow, window_scroll_callback)
gridVBO = VBO(gridArray, usage='GL_DYNAMIC_DRAW')
gridVBO.create_buffers()
gridEBO = VBO(elementArray,
usage='GL_STATIC_DRAW',
target='GL_ELEMENT_ARRAY_BUFFER')
gridEBO.create_buffers()
gridVAO = glGenVertexArrays(1)
glBindVertexArray(gridVAO)
gridVBO.bind()
gridVBO.copy_data()
gridEBO.bind()
gridEBO.copy_data()
glVertexAttribPointer(0, 3, GL_FLOAT,
GL_FALSE, 6 * ctypes.sizeof(ctypes.c_float),
ctypes.c_void_p(0))
class TextDrawer:
def __init__(self):
self.face = None
self.textures = dict()
# compile rendering program
self.renderProgram = GLProgram(_textVertexShaderSource,
_textFragmentShaderSource)
self.renderProgram.compile_and_link()
# make projection uniform
self.projectionUniform = GLUniform(self.renderProgram.get_program_id(),
'projection', 'mat4f')
self.textColorUniform = GLUniform(self.renderProgram.get_program_id(),
'textColor', 'vec3f')
self.textureSizeUniform = GLUniform(
self.renderProgram.get_program_id(), 'textureSize', 'vec2f')
# create rendering buffer
self.vbo = VBO(_get_rendering_buffer(0, 0, 0, 0))
self.vbo.create_buffers()
self.vboId = glGenBuffers(1)
# initialize VAO
self.vao = glGenVertexArrays(1)
glBindVertexArray(self.vao)
glBindBuffer(GL_ARRAY_BUFFER, self.vboId)
self.vbo.bind()
self.vbo.copy_data()
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE,
5 * ctypes.sizeof(ctypes.c_float),
ctypes.c_void_p(0))
glEnableVertexAttribArray(0)
glVertexAttribPointer(
1, 2, GL_FLOAT, GL_FALSE, 5 * ctypes.sizeof(ctypes.c_float),
ctypes.c_void_p(3 * ctypes.sizeof(ctypes.c_float)))
glEnableVertexAttribArray(1)
# self.vbo.unbind()
glBindVertexArray(0)
self.zNear = -1.0
self.zFar = 1.0
def delete(self):
self.textures.clear()
self.face = None
self.renderProgram.delete()
self.projectionUniform = None
self.textColorUniform = None
self.textureSizeUniform = None
self.vbo.delete()
glDeleteVertexArrays(1, [self.vao])
def load_font(self, fontFilename, fontSize):
assert os.path.exists(fontFilename)
self.textures.clear()
self.face = ft.Face(fontFilename)
self.face.set_char_size(fontSize)
# load all ASCII characters
for i in range(128):
self.load_character(chr(i))
def load_character(self, character):
assert self.face is not None
assert len(character) == 1
if character not in self.textures:
# load glyph in freetype
self.face.load_char(character)
ftBitmap = self.face.glyph.bitmap
height, width = ftBitmap.rows, ftBitmap.width
bitmap = np.array(ftBitmap.buffer, dtype=np.uint8).reshape(
(height, width))
# create texture
texture = _create_text_texture(bitmap)
# add texture object to the dictionary
characterSlot = CharacterSlot(texture, self.face.glyph)
self.textures[character] = characterSlot
def get_character(self, ch):
if ch not in self.textures:
self.load_character(ch)
return self.textures[ch]
def _draw_text(self, text, textPos, windowSize, scale, linespread,
foreColor):
if len(text) == 0:
return
blendEnabled = glIsEnabled(GL_BLEND)
glEnable(GL_BLEND)
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
self.renderProgram.use()
glBindVertexArray(self.vao)
glActiveTexture(GL_TEXTURE0)
foreColor = np.asarray(foreColor, np.float32)
self.textColorUniform.update(foreColor)
projectionMat = orthographic_projection(0.0, windowSize[0], 0.0,
windowSize[1], self.zNear,
self.zFar)
self.projectionUniform.update(projectionMat)
lineY = textPos[1]
nowX = textPos[0]
# split text into lines
lines = text.split('\n')
for line in lines:
if len(line) > 0:
# analyze this line
bearings = []
for ch in line:
charSlot = self.get_character(ch)
bearings.append(charSlot.bearing[1] * scale[1])
maxBearings = max(bearings)
for ch in line:
charSlot = self.get_character(ch)
xpos = nowX + charSlot.bearing[0] * scale[0]
yLowerd = (maxBearings - charSlot.bearing[1] * scale[1])
ypos = lineY - yLowerd
w = charSlot.textureSize[0] * scale[0]
h = charSlot.textureSize[1] * scale[1]
self.textureSizeUniform.update(np.array((w, h),
np.float32))
charSlot.texture.bind()
self.vbo.bind()
self.vbo.set_array(
_get_rendering_buffer(xpos, ypos, w, h, 0.999))
self.vbo.copy_data()
self.vbo.unbind()
glDrawArrays(GL_TRIANGLES, 0, 6)
charSlot.texture.unbind()
# the advance is number of 1/64 pixels
nowX += (charSlot.advance / 64.0) * scale[0]
nowX = textPos[0]
yOffset = self.get_character(
'X').textureSize[1] * scale[1] * linespread
lineY -= yOffset
glBindVertexArray(0)
if not blendEnabled:
glDisable(GL_BLEND)
def draw_text(self,
text,
textPos,
windowSize,
color=(1.0, 1.0, 1.0),
scale=(1.0, 1.0),
linespread=1.5):
return self._draw_text(text, textPos, windowSize, scale, linespread,
color)
class TextDrawer_Outlined:
def __init__(self):
self.face = None
self.stroker = None
self.foreTextures = dict()
self.backTextures = dict()
# compile rendering program
self.renderProgram = GLProgram(_textVertexShaderSource,
_textFragmentShaderSource)
self.renderProgram.compile_and_link()
# make projection uniform
self.projectionUniform = GLUniform(self.renderProgram.get_program_id(),
'projection', 'mat4f')
self.textColorUniform = GLUniform(self.renderProgram.get_program_id(),
'textColor', 'vec3f')
self.textureSizeUniform = GLUniform(
self.renderProgram.get_program_id(), 'textureSize', 'vec2f')
# create rendering buffer
self.vbo = VBO(_get_rendering_buffer(0, 0, 0, 0))
self.vbo.create_buffers()
self.vboId = glGenBuffers(1)
# initialize VAO
self.vao = glGenVertexArrays(1)
glBindVertexArray(self.vao)
glBindBuffer(GL_ARRAY_BUFFER, self.vboId)
self.vbo.bind()
self.vbo.copy_data()
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE,
5 * ctypes.sizeof(ctypes.c_float),
ctypes.c_void_p(0))
glEnableVertexAttribArray(0)
glVertexAttribPointer(
1, 2, GL_FLOAT, GL_FALSE, 5 * ctypes.sizeof(ctypes.c_float),
ctypes.c_void_p(3 * ctypes.sizeof(ctypes.c_float)))
glEnableVertexAttribArray(1)
# self.vbo.unbind()
glBindVertexArray(0)
self.zNear = -1.0
self.zFar = 1.0
def delete(self):
self.foreTextures.clear()
self.backTextures.clear()
self.face = None
self.stroker = None
self.renderProgram.delete()
self.projectionUniform = None
self.textColorUniform = None
self.textureSizeUniform = None
self.vbo.delete()
glDeleteVertexArrays(1, [self.vao])
def load_font(self, fontFilename, fontSize, outlineSize=2 * 64):
assert os.path.exists(fontFilename)
self.foreTextures.clear()
self.backTextures.clear()
self.face = ft.Face(fontFilename)
self.face.set_char_size(fontSize)
self.outlineSize = outlineSize
self.stroker = ft.Stroker()
self.stroker.set(outlineSize,
ft.FT_STROKER_LINECAPS['FT_STROKER_LINECAP_ROUND'],
ft.FT_STROKER_LINEJOINS['FT_STROKER_LINEJOIN_ROUND'],
0)
# load all ASCII characters
for i in range(128):
self.load_character(chr(i))
def load_character(self, character):
assert self.face is not None
assert len(character) == 1
if character not in self.foreTextures:
# load background glyph
# the render option will lead to an outline glyph (not rendered)
self.face.load_char(character, ft.FT_LOAD_FLAGS['FT_LOAD_DEFAULT'])
backGlyph = ft.FT_Glyph()
ft.FT_Get_Glyph(self.face.glyph._FT_GlyphSlot, ft.byref(backGlyph))
backGlyph = ft.Glyph(backGlyph)
# add border to the glyph
error = ft.FT_Glyph_StrokeBorder(ft.byref(backGlyph._FT_Glyph),
self.stroker._FT_Stroker, False,
False)
if error:
raise ft.FT_Exception(error)
# the render option will lead to a rendered glyph
backBitmapGlyph = backGlyph.to_bitmap(
ft.FT_RENDER_MODES['FT_RENDER_MODE_NORMAL'], 0)
backBitmap = backBitmapGlyph.bitmap
backHeight, backWidth = backBitmap.rows, backBitmap.width
backBitmap = np.array(backBitmap.buffer, dtype=np.uint8).reshape(
(backHeight, backWidth))
backTexture = _create_text_texture(backBitmap)
backSlot = CharacterSlot(backTexture, backBitmapGlyph)
self.backTextures[character] = backSlot
# load foreground glyph
self.face.load_char(character, ft.FT_LOAD_FLAGS['FT_LOAD_RENDER'])
foreBitmap = self.face.glyph.bitmap
foreHeight, foreWidth = foreBitmap.rows, foreBitmap.width
foreBitmap = np.array(foreBitmap.buffer, dtype=np.uint8).reshape(
(foreHeight, foreWidth))
foreTexture = _create_text_texture(foreBitmap)
foreSlot = CharacterSlot(foreTexture, self.face.glyph)
self.foreTextures[character] = foreSlot
def get_character(self, ch):
if ch not in self.foreTextures:
self.load_character(ch)
return (self.foreTextures[ch], self.backTextures[ch])
def _draw_text(self, text, textPos, windowSize, scale, linespread,
foreColor, backColor):
if len(text) == 0:
return
blendEnabled = glIsEnabled(GL_BLEND)
glEnable(GL_BLEND)
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
self.renderProgram.use()
glBindVertexArray(self.vao)
glActiveTexture(GL_TEXTURE0)
foreColor = np.asarray(foreColor, np.float32)
backColor = np.asarray(backColor, np.float32)
projectionMat = orthographic_projection(0.0, windowSize[0], 0.0,
windowSize[1], self.zNear,
self.zFar)
self.projectionUniform.update(projectionMat)
lineY = textPos[1]
nowX = textPos[0]
# split text into lines
lines = text.split('\n')
for line in lines:
if len(line) > 0:
# analyze this line
bearings = []
for ch in line:
_, backSlot = self.get_character(ch)
bearings.append(backSlot.bearing)
minBearings_X = min(zip(*bearings),
key=operator.itemgetter(0))[0] * scale[0]
maxBearings_Y = max(zip(*bearings),
key=operator.itemgetter(1))[1] * scale[1]
nowX = -minBearings_X
for ch in line:
foreSlot, backSlot = self.get_character(ch)
# draw the background
xpos = nowX + backSlot.bearing[0] * scale[0]
yLowerd = (maxBearings_Y - backSlot.bearing[1] * scale[1])
ypos = lineY - yLowerd
w = backSlot.textureSize[0] * scale[0]
h = backSlot.textureSize[1] * scale[1]
self.textureSizeUniform.update(np.array((w, h),
np.float32))
backSlot.texture.bind()
self.textColorUniform.update(backColor)
self.vbo.bind()
self.vbo.set_array(
_get_rendering_buffer(xpos, ypos, w, h, 0.99))
self.vbo.copy_data()
self.vbo.unbind()
glDrawArrays(GL_TRIANGLES, 0, 6)
backSlot.texture.unbind()
# draw the foreground
xpos = nowX + foreSlot.bearing[0] * scale[0]
yLowerd = (maxBearings_Y - foreSlot.bearing[1] * scale[1])
ypos = lineY - yLowerd
w = foreSlot.textureSize[0] * scale[0]
h = foreSlot.textureSize[1] * scale[1]
foreSlot.texture.bind()
self.textColorUniform.update(foreColor)
self.vbo.bind()
# the foreground is set closer to the screen so that it
# is rendered above the background
self.vbo.set_array(
_get_rendering_buffer(xpos, ypos, w, h, 0.999))
self.vbo.copy_data()
self.vbo.unbind()
glDrawArrays(GL_TRIANGLES, 0, 6)
foreSlot.texture.unbind()
# the advance is number of 1/64 pixels
nowX += ((foreSlot.advance + 2.0 * self.outlineSize) /
64.0) * scale[0]
yOffset = self.get_character(
'X')[1].textureSize[1] * scale[1] * linespread
lineY -= yOffset
glBindVertexArray(0)
if not blendEnabled:
glDisable(GL_BLEND)
def draw_text(self,
text,
textPos,
windowSize,
foreColor=(1.0, 1.0, 1.0),
backColor=(0.0, 0.0, 0.0),
scale=(1.0, 1.0),
linespread=1.5):
return self._draw_text(text, textPos, windowSize, scale, linespread,
foreColor, backColor)