def set_uniform(self, name, value):
name = name.encode()
valtype = type(value)
if valtype == bool or valtype == int:
glUniform1i(glGetUniformLocation(self.shader, name), int(value))
elif valtype == float:
glUniform1f(glGetUniformLocation(self.shader, name), value)
# elif valtype == VECTOR2_TYPE:
# glUniform2fv(glGetUniformLocation(self.shader, name), 1, value)
elif valtype == VECTOR3_TYPE:
glUniform3fv(glGetUniformLocation(self.shader, name), 1,
c_float(value[0]), c_float(value[1]),
c_float(value[2]))
elif valtype == VECTOR4_TYPE:
glUniform4fv(glGetUniformLocation(self.shader, name), 1,
c_float(value[0]), c_float(value[1]),
c_float(value[2]), c_float(value[3]))
elif valtype == MATRIX3_TYPE:
glUniformMatrix3fv(
glGetUniformLocation(self.shader, name), 1, GL_FALSE,
c_float(value[0][0])) # Should this be value[0][0]?
elif valtype == MATRIX4_TYPE:
glUniformMatrix4fv(
glGetUniformLocation(self.shader, name), 1, GL_FALSE,
c_float(value[0][0])) # Should this be value[0][0]?
def send(self):
for name, array in iteritems(self):
# Attach a shader location value to the array, for quick memory lookup. (gl calls are expensive, for some reason)
try:
loc = array.loc
except AttributeError:
shader_id = c_int(0)
gl.glGetIntegerv(gl.GL_CURRENT_PROGRAM, byref(shader_id))
if shader_id.value == 0:
raise UnboundLocalError(
"Shader not bound to OpenGL context--uniform cannot be sent."
)
array.loc = gl.glGetUniformLocation(shader_id.value,
name.encode('ascii'))
loc = array.loc
if array.ndim == 2: # Assuming a 4x4 float32 matrix (common for graphics operations)
try:
pointer = array.pointer
except AttributeError:
array.pointer = array.ctypes.data_as(POINTER(c_float *
16)).contents
pointer = array.pointer
gl.glUniformMatrix4fv(loc, 1, True, pointer)
else:
sendfun = self._sendfuns[array.dtype.kind][
len(array) - 1] # Find correct glUniform function
sendfun(loc, *array)
def uniform_matrixf(self, name, mat):
''' Upload uniform matrix, program must be currently bound. '''
loc = self.uniforms.get(name,
gl.glGetUniformLocation(self.handle,name))
self.uniforms[name] = loc
# Upload the 4x4 floating point matrix
gl.glUniformMatrix4fv(loc, 1, False, (ctypes.c_float * 16)(*mat))
def __init__(self, ec, fill_color, line_color, line_width, line_loop):
self._ec = ec
self._line_width = line_width
self._line_loop = line_loop # whether or not lines drawn are looped
# initialize program and shaders
from pyglet import gl
self._program = gl.glCreateProgram()
vertex = gl.glCreateShader(gl.GL_VERTEX_SHADER)
buf = create_string_buffer(tri_vert.encode('ASCII'))
ptr = cast(pointer(pointer(buf)), POINTER(POINTER(c_char)))
gl.glShaderSource(vertex, 1, ptr, None)
gl.glCompileShader(vertex)
_check_log(vertex, gl.glGetShaderInfoLog)
fragment = gl.glCreateShader(gl.GL_FRAGMENT_SHADER)
buf = create_string_buffer(tri_frag.encode('ASCII'))
ptr = cast(pointer(pointer(buf)), POINTER(POINTER(c_char)))
gl.glShaderSource(fragment, 1, ptr, None)
gl.glCompileShader(fragment)
_check_log(fragment, gl.glGetShaderInfoLog)
gl.glAttachShader(self._program, vertex)
gl.glAttachShader(self._program, fragment)
gl.glLinkProgram(self._program)
_check_log(self._program, gl.glGetProgramInfoLog)
gl.glDetachShader(self._program, vertex)
gl.glDetachShader(self._program, fragment)
gl.glUseProgram(self._program)
# Prepare buffers and bind attributes
loc = gl.glGetUniformLocation(self._program, b'u_view')
view = ec.window_size_pix
view = np.diag([2. / view[0], 2. / view[1], 1., 1.])
view[-1, :2] = -1
view = view.astype(np.float32).ravel()
gl.glUniformMatrix4fv(loc, 1, False, (c_float * 16)(*view))
self._counts = dict()
self._colors = dict()
self._buffers = dict()
self._points = dict()
self._tris = dict()
for kind in ('line', 'fill'):
self._counts[kind] = 0
self._colors[kind] = (0., 0., 0., 0.)
self._buffers[kind] = dict(array=gl.GLuint())
gl.glGenBuffers(1, pointer(self._buffers[kind]['array']))
self._buffers['fill']['index'] = gl.GLuint()
gl.glGenBuffers(1, pointer(self._buffers['fill']['index']))
gl.glUseProgram(0)
self.set_fill_color(fill_color)
self.set_line_color(line_color)
def draw(self,
uniforms,
entity,
models,
textures=(),
color=(1.0, 1.0, 1.0),
*args,
**kwargs):
glUseProgram(self)
glDisable(GL_DEPTH_TEST)
# Draw objects once as invisible to set stencil values.
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE,
GL_FALSE) # Don't write any color values to color buffer.
glStencilMask(0xFF) # Enable writing.
model = models[entity.model]
model.positions.enable()
model.indices.enable()
self.uniforms[b'perspective'].load(
uniforms.get(b'perspective').ctypes.data_as(POINTER(GLfloat)))
self.uniforms[b'view'].load(
uniforms.get(b'view').ctypes.data_as(POINTER(GLfloat)))
self.uniforms[b'color'].load(*color)
entity.get_transformation_matrix(
location=self.uniforms[b'transformation'])
model.draw()
# Draw again with larger model.
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE)
glStencilFunc(GL_NOTEQUAL, 1,
0xFF) # Update with 1's where the objects are rendered.
glStencilMask(
0x00
) # Value that AND's the value written to buffer. 0x00 basically disables writing to stencil.
glUniformMatrix4fv(
self.uniforms[b'transformation'], 1, GL_TRUE,
create_transformation_matrix(
*entity._location, *entity.rotation,
*(entity.scale + 0.05)).ctypes.data_as(POINTER(GLfloat)))
model.draw()
glBindBuffer(GL_ARRAY_BUFFER, 0)
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0)
glDisableVertexAttribArray(0)
glEnable(GL_DEPTH_TEST)
glStencilMask(0xFF)
def __init__(self, ec, fill_color, line_color, line_width, line_loop):
self._ec = ec
self._line_width = line_width
self._line_loop = line_loop # whether or not lines drawn are looped
# initialize program and shaders
from pyglet import gl
self._program = gl.glCreateProgram()
vertex = gl.glCreateShader(gl.GL_VERTEX_SHADER)
buf = create_string_buffer(tri_vert.encode('ASCII'))
ptr = cast(pointer(pointer(buf)), POINTER(POINTER(c_char)))
gl.glShaderSource(vertex, 1, ptr, None)
gl.glCompileShader(vertex)
_check_log(vertex, gl.glGetShaderInfoLog)
fragment = gl.glCreateShader(gl.GL_FRAGMENT_SHADER)
buf = create_string_buffer(tri_frag.encode('ASCII'))
ptr = cast(pointer(pointer(buf)), POINTER(POINTER(c_char)))
gl.glShaderSource(fragment, 1, ptr, None)
gl.glCompileShader(fragment)
_check_log(fragment, gl.glGetShaderInfoLog)
gl.glAttachShader(self._program, vertex)
gl.glAttachShader(self._program, fragment)
gl.glLinkProgram(self._program)
_check_log(self._program, gl.glGetProgramInfoLog)
gl.glDetachShader(self._program, vertex)
gl.glDetachShader(self._program, fragment)
gl.glUseProgram(self._program)
# Prepare buffers and bind attributes
loc = gl.glGetUniformLocation(self._program, b'u_view')
view = ec.window_size_pix
view = np.diag([2. / view[0], 2. / view[1], 1., 1.])
view[-1, :2] = -1
view = view.astype(np.float32).ravel()
gl.glUniformMatrix4fv(loc, 1, False, (c_float * 16)(*view))
self._counts = dict()
self._colors = dict()
self._buffers = dict()
self._points = dict()
self._tris = dict()
for kind in ('line', 'fill'):
self._counts[kind] = 0
self._colors[kind] = (0., 0., 0., 0.)
self._buffers[kind] = dict(array=gl.GLuint())
gl.glGenBuffers(1, pointer(self._buffers[kind]['array']))
self._buffers['fill']['index'] = gl.GLuint()
gl.glGenBuffers(1, pointer(self._buffers['fill']['index']))
gl.glUseProgram(0)
self.set_fill_color(fill_color)
self.set_line_color(line_color)
def uniform_matrixf(self, name: str, mat: mat4):
# upload a uniform matrix
# works with matrices stored as lists,
# as well as euclid matrices
# obtain the uniform location
location = glGetUniformLocation(self.handle, bytes(name, "utf-8"))
# upload the 4x4 floating point matrix
mat_values = (c_float * 16)(*mat.to_list())
# noinspection PyCallingNonCallable, PyTypeChecker
glUniformMatrix4fv(location, 1, True, mat_values)
def _draw_mouse_cursor(self):
""" If the mouse is over the image, draw a cursom crosshair. """
if self.mouse_position is None:
return
x, y = self.mouse_position
w, h = self.get_size()
vm = self._make_cursor_view_matrix(x, y)
with self.mouse_texture:
gl.glBlendFunc(gl.GL_ONE, gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glUniformMatrix4fv(0, 1, gl.GL_FALSE, (gl.GLfloat * 16)(*vm))
gl.glDrawArrays(gl.GL_TRIANGLES, 0, 6)
gl.glBlendFunc(gl.GL_ONE, gl.GL_ZERO)
def _draw_mouse_cursor(self):
""" If the mouse is over the image, draw a cursor crosshair. """
if self.mouse_position is None:
return
x, y = self.mouse_position
tw, th = self.mouse_texture.size
gl.glViewport(x - tw, y - th - 1, tw * 2 + 1, th * 2 + 1)
with self.vao, self.copy_program:
with self.mouse_texture:
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_ONE, gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glUniformMatrix4fv(0, 1, gl.GL_FALSE, EYE4)
gl.glDrawArrays(gl.GL_TRIANGLES, 0, 6)
gl.glBlendFunc(gl.GL_ONE, gl.GL_ZERO)
ww, wh = self.get_pixel_aligned_size()
gl.glViewport(0, 0, int(ww), int(wh))
def send(self):
"""
Sends all the key-value pairs to the graphics card.
These uniform variables will be available in the currently-bound shader.
"""
for name, array in iteritems(self):
shader_id = c_int(0)
gl.glGetIntegerv(gl.GL_CURRENT_PROGRAM, byref(shader_id))
if shader_id.value == 0:
raise UnboundLocalError(
"""Shader not bound to OpenGL context--uniform cannot be sent.
------------ Tip -------------
with ratcave.default_shader:
mesh.draw()
------------------------------
""")
# Attach a shader location value to the array, for quick memory lookup. (gl calls are expensive, for some reason)
try:
loc, shader_id_for_array = array.loc
if shader_id.value != shader_id_for_array:
raise Exception(
'Uniform location bound to a different shader')
except (AttributeError, Exception) as e:
array.loc = (gl.glGetUniformLocation(shader_id.value,
name.encode('ascii')),
shader_id.value)
if array.ndim == 2: # Assuming a 4x4 float32 matrix (common for graphics operations)
try:
pointer = array.pointer
except AttributeError:
array.pointer = array.ctypes.data_as(POINTER(c_float *
16)).contents
pointer = array.pointer
gl.glUniformMatrix4fv(array.loc[0], 1, True, pointer)
else:
sendfun = self._sendfuns[array.dtype.kind][
len(array) - 1] # Find correct glUniform function
sendfun(array.loc[0], *array)
def draw(self, uniforms, entities, models, textures=(), lights=(), *args, **kwargs):
glUseProgram(self)
# PREPARE SHADER
glUniformMatrix4fv( # ctypes.data_as must be here and not at initialization.
self.uniforms[b'perspective'], 1, GL_TRUE, uniforms.get(b'perspective').ctypes.data_as(POINTER(GLfloat))
)
glUniformMatrix4fv(
self.uniforms[b'view'], 1, GL_TRUE, uniforms.get(b'view').ctypes.data_as(POINTER(GLfloat))
)
for i, entity in enumerate(lights):
glUniform3f(self.uniforms[b'light[' + bytes(str(i), 'utf-8') + b'].position'], *entity.location)
glUniform3f(self.uniforms[b'light[' + bytes(str(i), 'utf-8') + b'].color'], *entity.color)
glUniform1f(self.uniforms[b'light[' + bytes(str(i), 'utf-8') + b'].constant'], entity.attenuation[0])
glUniform1f(self.uniforms[b'light[' + bytes(str(i), 'utf-8') + b'].linear'], entity.attenuation[1])
glUniform1f(self.uniforms[b'light[' + bytes(str(i), 'utf-8') + b'].quadratic'], entity.attenuation[1])
# PREPARE MODELS
for model_index, texture_mapping in self.entities.items():
model = models[model_index]
model.enable()
# PREPARE TEXTURES
glActiveTexture(GL_TEXTURE0)
glActiveTexture(GL_TEXTURE0 + 1)
for texture_list, entity_list in texture_mapping.items():
if hasattr(texture_list, '__iter__'):
glBindTexture(GL_TEXTURE_2D, textures[0])
glUniform1i(self.uniforms[b'diffuse_texture'], 0)
glBindTexture(GL_TEXTURE_2D, textures[1])
glUniform1i(self.uniforms[b'specular_texture'], 1)
# textures[0].enable(slot=0)
# textures[1].enable(slot=1)
else:
textures[texture_list].enable(slot=0)
glUniform1i(self.uniforms[b'diffuse_texture'], 0)
# PREPARE ENTITIES
for entity in entity_list:
glUniformMatrix4fv(
self.uniforms[b'transformation'], 1, GL_TRUE,
entity.get_transformation_matrix().ctypes.data_as(POINTER(GLfloat))
)
model.draw()
glBindBuffer(GL_ARRAY_BUFFER, 0)
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0)
glBindTexture(GL_TEXTURE_2D, 0)
glDisableVertexAttribArray(0)
glDisableVertexAttribArray(1)
glDisableVertexAttribArray(2)
def draw(self, uniforms, entities, models, *args, **kwargs):
glUseProgram(self)
glUniformMatrix4fv(
self.uniforms[b'perspective'], 1, GL_TRUE, uniforms.get(b'perspective').ctypes.data_as(POINTER(GLfloat))
)
glUniformMatrix4fv(
self.uniforms[b'view'], 1, GL_TRUE, uniforms.get(b'view').ctypes.data_as(POINTER(GLfloat))
)
for model_index, entity_list in entities.items():
model = models[model_index]
model.enable()
for entity in entity_list:
glUniformMatrix4fv(
self.uniforms[b'transformation'], 1, GL_TRUE,
entity.get_transformation_matrix().ctypes.data_as(POINTER(GLfloat))
)
glUniform3f(self.uniforms[b'color'], *entity.color)
model.draw()
glBindBuffer(GL_ARRAY_BUFFER, 0)
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0)
glBindTexture(GL_TEXTURE_2D, 0)
glDisableVertexAttribArray(0)
def _render_view(self):
gl.glClearBufferfv(gl.GL_COLOR, 0, (gl.GLfloat * 4)(0.25, 0.25, 0.25,
1))
if not self.view:
return
w, h, d = self.view.shape
size = w, h
window_size = self.get_size()
ob = render_view(self)
vm = make_view_matrix(window_size, size, self.zoom, self.offset)
vm = (gl.GLfloat * 16)(*vm)
gl.glViewport(0, 0, *window_size)
self._update_border(self.view.shape)
with self.border_vao, self.line_program:
gl.glUniformMatrix4fv(0, 1, gl.GL_FALSE, vm)
r, g, b, a = self.drawing.palette.colors[
0] # Color 0 is currently hardcoded background
gl.glUniform3f(1, r / 256, g / 256, b / 256)
gl.glDrawArrays(gl.GL_TRIANGLE_FAN, 0, 4)
with self.vao, self.copy_program:
# Draw the actual drawing
with ob["color"]:
gl.glEnable(gl.GL_BLEND)
gl.glUniformMatrix4fv(0, 1, gl.GL_FALSE,
(gl.GLfloat * 16)(*vm))
gl.glDrawArrays(gl.GL_TRIANGLES, 0, 6)
self._draw_mouse_cursor()
with self.border_vao, self.line_program:
gl.glUniform3f(1, 0., 0., 0.)
gl.glLineWidth(1)
gl.glDrawArrays(gl.GL_LINE_LOOP, 0, 4)
def render(self, position, chunk_meshes):
gl.glViewport(0, 0, *self.size)
gl.glDisable(gl.GL_BLEND)
gl.glDisable(gl.GL_ALPHA_TEST)
gl.glEnable(gl.GL_CULL_FACE)
gl.glEnable(gl.GL_DEPTH_TEST)
gl.glDepthFunc(gl.GL_LEQUAL)
gl.glDepthMask(gl.GL_TRUE)
x, y, z = position
view_matrices = [
Matrix4.new_scale(-1, -1, 1).rotatey(pi / 2).translate(-x, -y,
-z), # +X
Matrix4.new_scale(-1, -1,
1).rotatey(-pi / 2).translate(-x, -y, -z), # -X
Matrix4.new_rotatex(-pi / 2).translate(-x, -y, -z), # +Y
Matrix4.new_rotatex(pi / 2).translate(-x, -y, -z), # -Y
Matrix4.new_scale(-1, -1, 1).rotatey(pi).translate(-x, -y,
-z), # +Z
Matrix4.new_scale(-1, -1, 1).translate(-x, -y, -z) # -Z
]
model_matrix = Matrix4.new_scale(
1, 1, constants.WALL_TEXTURE_HEIGHT /
(constants.WALL_TEXTURE_WIDTH / sqrt(2) * (sqrt(3))))
gl.glUniformMatrix4fv(1, 1, gl.GL_FALSE, gl_matrix(model_matrix))
with self.program, self.name:
view_matrix = make_view_matrix_persp(position)
gl.glUniformMatrix4fv(0, 1, gl.GL_FALSE, gl_matrix(view_matrix))
for chunk, mesh in chunk_meshes.items():
mesh.draw()
def display_update(self):
assert self.player is not None
self.switch_to()
if self.walls is None:
self.build_walls()
# view
if self.cummulative_time >= self.target_time:
pc = self.target_camera
else:
pc = self.target_camera - self.delta_camera * (
max(self.target_time - self.cummulative_time, 0.0) /
self.delta_time)
camera = pyrr.vector3.create(
pc[0] + 0.5,
(self.ground_level + self.wall_level) / 2.0,
-pc[1] - 0.5,
dtype=np.float32,
)
direction = pyrr.vector3.create(-np.sin(pc[2]), 0.0, np.cos(pc[2]))
view = look_at(camera, direction=direction)
transform = view
# then project
projection = pyrr.matrix44.create_perspective_projection_matrix(
90.0, self.width / self.height, 0.1, 1000.0, dtype=np.float32).T
transform = np.dot(projection, transform)
gl.glUniformMatrix4fv(
self.transform_loc, # location
1, # count
gl.GL_TRUE, # Numpy uses Row-Dominant, OpenGL used Column-Dominant
(gl.GLfloat * transform.size)(*transform.flatten()),
) # value
def __set_uniforms(self):
# projection matrix (proj)
proj_loc = gl.glGetUniformLocation(self.__prog.value, "proj")
proj_matrix = self.__proj_matrix()
proj_matrix_ptr = ct.cast( \
ct.pointer(np.ctypeslib.as_ctypes(proj_matrix)),
ct.POINTER(ct.c_float) )
gl.glUniformMatrix4fv(proj_loc, 1, gl.GL_TRUE,
proj_matrix_ptr)
# voxel spacing
voxel_spacing_loc = gl.glGetUniformLocation(self.__prog.value,
"voxel_spacing")
gl.glUniform3f(voxel_spacing_loc,
self.__voxel_spacing[0]*self.__downsample,
self.__voxel_spacing[1]*self.__downsample,
self.__voxel_spacing[2]*self.__downsample)
# voxel size
voxel_size_loc = gl.glGetUniformLocation(self.__prog.value,
"voxel_size")
gl.glUniform3f(voxel_size_loc,
self.__voxel_size[0]*self.__downsample,
self.__voxel_size[1]*self.__downsample,
self.__voxel_size[2]*self.__downsample)
# data; not technically a "uniform" but a texture
data_loc = gl.glGetUniformLocation(self.__prog.value,
"data")
gl.glUniform1i(data_loc, 0)
gl.glActiveTexture(gl.GL_TEXTURE0)
gl.glBindTexture(gl.GL_TEXTURE_BUFFER, self.__data_texture.value)
# dims
dims_loc = gl.glGetUniformLocation(self.__prog.value,
"dims")
gl.glUniform3i(dims_loc,
self.__data.shape[0]/self.__downsample,
self.__data.shape[1]/self.__downsample,
self.__data.shape[2]/self.__downsample)
# global_opacity
global_opacity_loc = gl.glGetUniformLocation(self.__prog.value,
"global_opacity")
gl.glUniform1f(global_opacity_loc, self.__opacity)
# min value
min_value_loc = gl.glGetUniformLocation(self.__prog.value,
"min_value")
gl.glUniform1f(min_value_loc, self.__min_value)
# saturation value
saturation_value_loc = gl.glGetUniformLocation(self.__prog.value,
"saturation_value")
gl.glUniform1f(saturation_value_loc, self.__saturation_value)
# downsample
downsample_loc = gl.glGetUniformLocation(self.__prog.value,
"downsample")
gl.glUniform1i(downsample_loc, self.__downsample)
def uniform_matrix(
self, location,
matrix): # pass a matrix to the specified location in the program
gl.glUniformMatrix4fv(location, 1, gl.GL_FALSE,
(gl.GLfloat * 16)(*sum(matrix.data, [])))
def render_view(window):
""" Render the current view to a texture. """
drawing = window.drawing
view = window.view
changed = False
# Update the overlay with the current stroke
overlay = view.overlay
w, h, d = view.shape
size = w, h
overlay_texture = _get_overlay_texture(size)
if overlay.dirty and overlay.lock.acquire(timeout=0.01):
rect = overlay.dirty
x0, y0, x1, y1 = rect.box()
overlay_data = overlay.data[x0:x1, y0:y1].tobytes("F")
gl.glPixelStorei(gl.GL_UNPACK_ALIGNMENT,
1) # Needed for writing 8bit data
gl.glTextureSubImage2D(overlay_texture.name, 0, *rect.position,
*rect.size, gl.GL_RGBA_INTEGER,
gl.GL_UNSIGNED_BYTE, overlay_data)
gl.glPixelStorei(gl.GL_UNPACK_ALIGNMENT, 4)
overlay.dirty = None
overlay.lock.release()
changed = True
# Update the image texture
data = drawing.data
drawing_texture = _get_3d_texture(data.shape)
if drawing.dirty:
with drawing.lock:
update_data = data[drawing.dirty].tobytes(order="F")
sx, sy, sz = drawing.dirty
drawing.dirty = None
sw = sx.stop - sx.start
sh = sy.stop - sy.start
sd = sz.stop - sz.start
gl.glPixelStorei(gl.GL_UNPACK_ALIGNMENT,
1) # Needed for writing 8bit data
gl.glTextureSubImage3D(drawing_texture.name, 0, sx.start, sy.start,
sz.start, sw, sh, sd, gl.GL_RED_INTEGER,
gl.GL_UNSIGNED_BYTE, update_data)
gl.glPixelStorei(gl.GL_UNPACK_ALIGNMENT, 4)
changed = True
# Render everything to the offscreen buffer
# TODO we actually should not have to redraw the offscreen_buffer unless something has changed
# (e.g. drawing, overlay, palette or cursor)
offscreen_buffer = _get_offscreen_buffer(size)
colors = _get_colors(drawing.palette.colors)
vao = _get_vao()
draw_program = _get_program()
empty_texture = _get_empty_texture(size)
cursor_pos = d - view.index - 1 # TODO why?
other_layer_alpha = 0.3 if view.show_only_current_layer or view.layer_being_switched else 1.0
T = _get_transform(view.rotation)
with vao, offscreen_buffer:
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glViewport(0, 0, w, h)
gl.glClearBufferfv(gl.GL_COLOR, 0, EMPTY_COLOR)
with draw_program, drawing_texture:
gl.glUniformMatrix4fv(0, 1, gl.GL_FALSE, (gl.GLfloat * 16)(*T))
gl.glUniform3f(1, *view.direction)
gl.glUniform4fv(5, 256, colors)
# Draw the layers below the current one
if cursor_pos < d - 1:
with empty_texture:
gl.glUniform1f(2, other_layer_alpha)
gl.glUniform2i(3, cursor_pos + 1, d)
gl.glDrawArrays(gl.GL_TRIANGLES, 0, 6)
# Draw the current layer + overlay
with overlay_texture:
gl.glUniform1f(2, 1)
gl.glUniform2i(3, cursor_pos, cursor_pos + 1)
gl.glDrawArrays(gl.GL_TRIANGLES, 0, 6)
# Draw the layers on top
if cursor_pos > 0:
with empty_texture:
gl.glUniform1f(2, other_layer_alpha)
gl.glUniform2i(3, 0, cursor_pos)
gl.glDrawArrays(gl.GL_TRIANGLES, 0, 6)
return offscreen_buffer
def load_uniform_matrix(self, **uniforms):
self._assert_bound()
for name, data in uniforms.items():
glUniformMatrix4fv(self.uniform[name], 1, GL_TRUE,
data.ctypes.data_as(POINTER(GLfloat)))
def __call__(self, oldpaint, imgui, drawing, brush,
altitude: float=-120, azimuth: float=0, spin: bool=False):
selection = drawing.selection
if selection:
size = selection.size
depth = len(drawing.layers)
colors = drawing.palette.as_tuple()
mesh = self._get_mesh(tuple(drawing.layers), selection, colors)
if not mesh:
# TODO hacky
self.texture and self.texture[0].clear()
return
w, h = size
model_matrix = Matrix4.new_translate(-w/2, -h/2, depth/2).scale(1, 1, 1/math.sin(math.pi/3))
far = w*2
near = 0
frust = Matrix4()
frust[:] = (2/w, 0, 0, 0,
0, 2/h, 0, 0,
0, 0, -2/(far-near), 0,
0, 0, -(far+near)/(far-near), 1)
offscreen_buffer = self._get_buffer(size)
with offscreen_buffer, self.program, \
enabled(gl.GL_DEPTH_TEST), disabled(gl.GL_CULL_FACE):
azimuth = math.degrees(time()) if spin else azimuth
view_matrix = (
Matrix4
# .new_scale(2/w, 2/h, 1/max(w, h))
.new_translate(0, 0, -w)
.rotatex(math.radians(altitude))
.rotatez(math.radians(azimuth)) # Rotate over time
)
gl.glUniformMatrix4fv(0, 1, gl.GL_FALSE,
gl_matrix(frust * view_matrix * model_matrix))
gl.glViewport(0, 0, *size)
gl.glPointSize(1.0)
mesh.draw(mode=gl.GL_POINTS)
shadow_buffer = self._get_shadow_buffer(size)
with shadow_buffer, self.program, \
enabled(gl.GL_DEPTH_TEST), disabled(gl.GL_CULL_FACE):
view_matrix = (
Matrix4
# .new_scale(2/w, 2/h, 1/max(w, h))
.new_translate(0, 0, -5)
.rotatex(math.pi)
.rotatez(azimuth) # Rotate over time
)
gl.glUniformMatrix4fv(0, 1, gl.GL_FALSE,
gl_matrix(frust * view_matrix * model_matrix))
gl.glViewport(0, 0, *size)
gl.glPointSize(1.0)
mesh.draw(mode=gl.GL_POINTS)
final_buffer = self._get_final_buffer(size)
with self._vao, final_buffer, self._copy_program, disabled(gl.GL_CULL_FACE, gl.GL_DEPTH_TEST):
with offscreen_buffer["color"], offscreen_buffer["normal"], offscreen_buffer["position"], shadow_buffer["depth"]:
gl.glDrawArrays(gl.GL_TRIANGLES, 0, 6)
# TODO must be careful here so that the texture is always valid
# (since imgui may read it at any time) Find a way to ensure this.
texture = self._get_texture(size)
gl.glCopyImageSubData(final_buffer["color"].name, gl.GL_TEXTURE_2D, 0, 0, 0, 0,
texture.name, gl.GL_TEXTURE_2D, 0, 0, 0, 0,
w, h, 1)
self.texture = texture, size
def on_draw(self):
# Prevent trying to draw before things have been set up
if not hasattr(self, "offscreen_buffer"):
return
# Model matrix we'll use to position the main model
suzanne_model_matrix = (Matrix4.new_identity().rotatex(
-math.pi / 2).rotatez(time())) # Rotate over time
plane_model_matrix = Matrix4.new_rotatey(math.pi).translate(0, 0, 2)
# Render to an offscreen buffer
with self.offscreen_buffer, self.view_program, \
enabled(gl.GL_DEPTH_TEST), disabled(gl.GL_CULL_FACE):
gl.glDepthMask(gl.GL_TRUE)
w, h = self.size
aspect = h / w
# Calculate a view frustum; this is basically our camera.
near = 5
far = 15
width = 2
height = 2 * aspect
frustum = (Matrix4.new(near / width, 0, 0, 0, 0, near / height, 0,
0, 0, 0, -(far + near) / (far - near), -1,
0, 0, -2 * far * near / (far - near), 0))
# The view matrix positions the camera in the scene
view_matrix = (Matrix4.new_identity().translate(0, 0, -8))
# Send the matrices to GL
gl.glUniformMatrix4fv(0, 1, gl.GL_FALSE,
gl_matrix(frustum * view_matrix))
gl.glUniformMatrix4fv(1, 1, gl.GL_FALSE,
gl_matrix(suzanne_model_matrix))
gl.glUniform4f(2, 0.3, 0.3, 1,
1) # Set the "color" uniform to blue
self.suzanne.draw()
# We'll also draw a simple plane behind the main model
gl.glUniformMatrix4fv(1, 1, gl.GL_FALSE,
gl_matrix(plane_model_matrix))
gl.glUniform4f(2, 0.3, 1, 0.3,
1) # Set the "color" uniform to green
self.plane.draw(mode=gl.GL_TRIANGLE_STRIP)
# Render shadow buffer
# Basically the same scene as above, but to a different buffer and from a different view
with self.shadow_buffer, self.view_program, enabled(
gl.GL_DEPTH_TEST), disabled(gl.GL_CULL_FACE):
gl.glDepthMask(gl.GL_TRUE)
frustum = Matrix4.new_perspective(1, 1, 1, 12)
view_matrix = (Matrix4.new_identity().translate(
0, 0, -4).rotatey(0.5).rotatex(0.3))
light_pos = (view_matrix.inverse() * Point3(0, 0, 0))
light_view_matrix = frustum * view_matrix
gl.glUniformMatrix4fv(0, 1, gl.GL_FALSE,
gl_matrix(light_view_matrix))
gl.glUniformMatrix4fv(1, 1, gl.GL_FALSE,
gl_matrix(suzanne_model_matrix))
gl.glUniform4f(2, 0.9, 0.3, 0.4, 1)
self.suzanne.draw()
gl.glUniformMatrix4fv(1, 1, gl.GL_FALSE,
gl_matrix(plane_model_matrix))
self.plane.draw(mode=gl.GL_TRIANGLE_STRIP)
# Now draw the offscreen buffer to another buffer, combining it with the
# lighting information to get a nice image.
# Note: This step is pretty pointless here, as we might just draw directly to screen.
# Just demonstrates how to do it.
with self.vao, self.offscreen_buffer2, self.lighting_program, disabled(
gl.GL_CULL_FACE, gl.GL_DEPTH_TEST):
gl.glUniform3f(0, *light_pos)
gl.glUniformMatrix4fv(1, 1, gl.GL_FALSE,
gl_matrix(light_view_matrix))
# Bind some of the offscreen buffer's textures so the shader can read them.
with self.offscreen_buffer["color"], self.offscreen_buffer["normal"], \
self.offscreen_buffer["position"], self.shadow_buffer["depth"]:
gl.glDrawArrays(gl.GL_TRIANGLES, 0, 6)
# Now render the finished image to the screen
with self.vao, self.copy_program, disabled(gl.GL_CULL_FACE,
gl.GL_DEPTH_TEST):
with self.offscreen_buffer2["color"]:
gl.glDrawArrays(gl.GL_TRIANGLES, 0, 6)
def on_draw(self):
gl.glClearBufferfv(gl.GL_COLOR, 0, BG_COLOR)
if self.drawing:
window_size = self.get_pixel_aligned_size()
w, h = self.drawing.size
vm = (gl.GLfloat * 16)(*make_view_matrix(
window_size, self.drawing.size, self.zoom, self.offset))
offscreen_buffer = render_drawing(self.drawing,
self.highlighted_layer)
ww, wh = window_size
gl.glViewport(0, 0, int(ww), int(wh))
# Draw a background rectangle
with self.vao, self.copy_program:
gl.glUniformMatrix4fv(0, 1, gl.GL_FALSE,
(gl.GLfloat * 16)(*vm))
if self.drawing and self.drawing.grid:
with self.get_background_texture(
self.drawing.palette.colors[0], 0.9):
gw, gh = self.drawing.grid_size
gl.glUniform2f(1, w / (gw * 2), h / (gh * 2))
gl.glBlendFunc(gl.GL_ONE, gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glDrawArrays(gl.GL_TRIANGLES, 0, 6)
else:
#gl.glDrawArrays(gl.GL_TRIANGLES, 0, 6)
# r, g, b, _ = self.drawing.palette.get_color_as_float(self.drawing.palette.colors[0])
# gl.glClearColor(r, g, b, 1)
# TODO should fill with color 0 here!
# gl.glDrawArrays(gl.GL_TRIANGLES, 0, 6)
with self.get_background_texture(
self.drawing.palette.colors[0], 1):
gw, gh = self.drawing.grid_size
gl.glUniform2f(1, w / (gw * 2), h / (gh * 2))
gl.glBlendFunc(gl.GL_ONE, gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glDrawArrays(gl.GL_TRIANGLES, 0, 6)
with offscreen_buffer["color"]:
gl.glUniform2f(1, 1, 1)
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_ONE, gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glUniformMatrix4fv(0, 1, gl.GL_FALSE, vm)
gl.glDrawArrays(gl.GL_TRIANGLES, 0, 6)
with self.line_program:
with self.border_vao:
self.update_border(self.drawing.current.rect)
gl.glUniformMatrix4fv(0, 1, gl.GL_FALSE, vm)
# r, g, b, _ = self.drawing.palette.get_color_as_float(self.drawing.palette.colors[0])
# gl.glUniform3f(1, r, g, b)
# gl.glDrawArrays(gl.GL_TRIANGLE_FAN, 0, 4)
gl.glUniform3f(1, 0., 0., 0.)
gl.glLineWidth(1)
gl.glDrawArrays(gl.GL_LINE_LOOP, 0, 4)
# Selection rectangle
if self.stroke:
tool = self.stroke.tool
selection = ((tool and tool.show_rect and tool.rect)
or self.selection)
if selection:
self.set_selection(selection)
with self.selection_vao:
gl.glUniformMatrix4fv(0, 1, gl.GL_FALSE, vm)
gl.glUniform3f(1, 1., 1., 0.)
gl.glLineWidth(1)
gl.glDrawArrays(gl.GL_LINE_LOOP, 0, 4)
if not self.tablet.active:
self._draw_mouse_cursor()
ui.draw_ui(self)
gl.glFinish(
) # No double buffering, to minimize latency (does this work?)
def set_uniform_matrix(self, name, mat):
location = gl.glGetUniformLocation(self.program, name.encode('ascii'))
gl.glUniformMatrix4fv(location, 1, False, (ct.c_float * 16)(*mat))
def uniform_matrix(self, location, matrix):
gl.glUniformMatrix4fv(location, 1, gl.GL_FALSE,
(gl.GLfloat * 16)(*sum(matrix.data, [])))
def uniform_matrixf(self, name, mat):
# Obtian the uniform location
loc = gl.glGetUniformLocation(self.handle, name)
# Uplaod the 4x4 floating point matrix
gl.glUniformMatrix4fv(loc, 1, False, (c_float * 16)(*mat))
def __init__(self):
#consider bumping opengl version if apple supports it
#amdgpu-mesa currently supports up to 4.5
super(ControledRender,
self).__init__(512,
512,
fullscreen=False,
config=gl.Config(major_version=4,
minor_version=1),
visible=False)
print(self.context.get_info().get_version())
self.vertex_buffer = gl.GLuint(0)
self.vao = gl.GLuint(0)
#self.prev_program = (gl.GLint * 1)()
self.dimx = args["A"].shape[0]
self.dimy = args["A"].shape[1]
self.dimz = args["A"].shape[2]
A = args["A"].astype(np.float32)
#print("A shape " + str(A.shape))
#print(str(A.dtype))
#print(A)
#self.dp = self.tdata.ctypes.data_as(ctypes.POINTER(ctypes.c_void_p))
self.Ap = A.ctypes.data_as(ctypes.POINTER(ctypes.c_void_p))
T = args["transform"].astype(np.float32)
self.Tp = T.ctypes.data_as(ctypes.POINTER(ctypes.c_float))
self.setupFBOandTextures()
self.setupShaders()
data = [
-1.0, -1.0, 1.0, -1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0,
1.0
]
dataGl = (gl.GLfloat * len(data))(*data)
gl.glGenBuffers(1, ctypes.byref(self.vertex_buffer))
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self.vertex_buffer)
gl.glBufferData(gl.GL_ARRAY_BUFFER,
len(dataGl) * 4, dataGl, gl.GL_STATIC_DRAW)
gl.glGenVertexArrays(1, ctypes.byref(self.vao))
gl.glBindVertexArray(self.vao)
gl.glUseProgram(self.programA)
self.pos_posA = gl.glGetAttribLocation(
self.programA, ctypes.create_string_buffer(b"a_position"))
assert (self.pos_posA >= 0)
gl.glEnableVertexAttribArray(self.pos_posA)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self.vertex_buffer)
gl.glVertexAttribPointer(self.pos_posA, 2, gl.GL_FLOAT, False, 0,
0)
self.tex_pos_A = gl.glGetUniformLocation(self.programA, b"A")
self.transform_pos = gl.glGetUniformLocation(
self.programA, b"transform")
self.step_pos_A = gl.glGetUniformLocation(self.programA, b"step")
self.slice_pos_A = gl.glGetUniformLocation(self.programA, b"slice")
self.checkUniformLocation(self.tex_pos_A)
self.checkUniformLocation(self.transform_pos)
self.checkUniformLocation(self.step_pos_A)
self.checkUniformLocation(self.slice_pos_A)
gl.glUniformMatrix4fv(self.transform_pos, 1, True, self.Tp)
#gl.glUniformMatrix4fv(self.transform_pos, 1, False, self.Tp)
#may need changed for nonsquare textures
gl.glUniform1f(self.step_pos_A, 1 / self.dimx)
gl.glViewport(0, 0, self.dimx, self.dimy)
def uniform_matrixf(self, name, mat):
# obtian the uniform location
loc = GL.glGetUniformLocation(self.Handle, name)
# uplaod the 4x4 floating point matrix
GL.glUniformMatrix4fv(loc, 1, False, (ctypes.c_float * 16)(*mat))
def render(self, draw_data):
# perf: local for faster access
io = self.io
display_width, display_height = io.display_size
fb_width = int(display_width * io.display_fb_scale[0])
fb_height = int(display_height * io.display_fb_scale[1])
if fb_width == 0 or fb_height == 0:
return
draw_data.scale_clip_rects(*io.display_fb_scale)
# backup GL state
# todo: provide cleaner version of this backup-restore code
last_program = gl.GLint()
gl.glGetIntegerv(gl.GL_CURRENT_PROGRAM, byref(last_program))
last_texture = gl.GLint()
gl.glGetIntegerv(gl.GL_TEXTURE_BINDING_2D, byref(last_texture))
last_active_texture = gl.GLint()
gl.glGetIntegerv(gl.GL_ACTIVE_TEXTURE, byref(last_active_texture))
last_array_buffer = gl.GLint()
gl.glGetIntegerv(gl.GL_ARRAY_BUFFER_BINDING, byref(last_array_buffer))
last_element_array_buffer = gl.GLint()
gl.glGetIntegerv(gl.GL_ELEMENT_ARRAY_BUFFER_BINDING, byref(last_element_array_buffer))
last_vertex_array = gl.GLint()
gl.glGetIntegerv(gl.GL_VERTEX_ARRAY_BINDING, byref(last_vertex_array))
last_blend_src = gl.GLint()
gl.glGetIntegerv(gl.GL_BLEND_SRC, byref(last_blend_src))
last_blend_dst = gl.GLint()
gl.glGetIntegerv(gl.GL_BLEND_DST, byref(last_blend_dst))
last_blend_equation_rgb = gl.GLint()
gl.glGetIntegerv(gl.GL_BLEND_EQUATION_RGB, byref(last_blend_equation_rgb))
last_blend_equation_alpha = gl.GLint()
gl.glGetIntegerv(gl.GL_BLEND_EQUATION_ALPHA, byref(last_blend_equation_alpha))
last_viewport = (gl.GLint*4)()
gl.glGetIntegerv(gl.GL_VIEWPORT, last_viewport)
last_scissor_box = (gl.GLint*4)()
gl.glGetIntegerv(gl.GL_SCISSOR_BOX, last_scissor_box)
last_enable_blend = gl.GLint()
gl.glIsEnabled(gl.GL_BLEND, byref(last_enable_blend))
last_enable_cull_face = gl.GLint()
gl.glIsEnabled(gl.GL_CULL_FACE, byref(last_enable_cull_face))
last_enable_depth_test = gl.GLint()
gl.glIsEnabled(gl.GL_DEPTH_TEST, byref(last_enable_depth_test))
last_enable_scissor_test = gl.GLint()
gl.glIsEnabled(gl.GL_SCISSOR_TEST, byref(last_enable_scissor_test))
gl.glEnable(gl.GL_BLEND)
gl.glBlendEquation(gl.GL_FUNC_ADD)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glDisable(gl.GL_CULL_FACE)
gl.glDisable(gl.GL_DEPTH_TEST)
gl.glEnable(gl.GL_SCISSOR_TEST)
gl.glActiveTexture(gl.GL_TEXTURE0)
gl.glViewport(0, 0, int(fb_width), int(fb_height))
ortho_projection = [
2.0/display_width, 0.0, 0.0, 0.0,
0.0, 2.0/-display_height, 0.0, 0.0,
0.0, 0.0, -1.0, 0.0,
-1.0, 1.0, 0.0, 1.0
]
gl.glUseProgram(self._shader_handle)
gl.glUniform1i(self._attrib_location_tex, 0)
gl.glUniformMatrix4fv(self._attrib_proj_mtx, 1, gl.GL_FALSE, (gl.GLfloat * 16)(*ortho_projection))
gl.glBindVertexArray(self._vao_handle)
for commands in draw_data.commands_lists:
idx_buffer_offset = 0
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self._vbo_handle)
# todo: check this (sizes)
gl.glBufferData(gl.GL_ARRAY_BUFFER, commands.vtx_buffer_size * imgui.VERTEX_SIZE, c_void_p(commands.vtx_buffer_data), gl.GL_STREAM_DRAW)
gl.glBindBuffer(gl.GL_ELEMENT_ARRAY_BUFFER, self._elements_handle)
# todo: check this (sizes)
gl.glBufferData(gl.GL_ELEMENT_ARRAY_BUFFER, commands.idx_buffer_size * imgui.INDEX_SIZE, c_void_p(commands.idx_buffer_data), gl.GL_STREAM_DRAW)
# todo: allow to iterate over _CmdList
for command in commands.commands:
gl.glBindTexture(gl.GL_TEXTURE_2D, command.texture_id)
# todo: use named tuple
x, y, z, w = command.clip_rect
gl.glScissor(int(x), int(fb_height - w), int(z - x), int(w - y))
if imgui.INDEX_SIZE == 2:
gltype = gl.GL_UNSIGNED_SHORT
else:
gltype = gl.GL_UNSIGNED_INT
gl.glDrawElements(gl.GL_TRIANGLES, command.elem_count, gltype, c_void_p(idx_buffer_offset))
idx_buffer_offset += command.elem_count * imgui.INDEX_SIZE
# restore modified GL state
gl.glUseProgram(cast((c_int*1)(last_program), POINTER(c_uint)).contents)
gl.glActiveTexture(cast((c_int*1)(last_active_texture), POINTER(c_uint)).contents)
gl.glBindTexture(gl.GL_TEXTURE_2D, cast((c_int*1)(last_texture), POINTER(c_uint)).contents)
gl.glBindVertexArray(cast((c_int*1)(last_vertex_array), POINTER(c_uint)).contents)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, cast((c_int*1)(last_array_buffer), POINTER(c_uint)).contents)
gl.glBindBuffer(gl.GL_ELEMENT_ARRAY_BUFFER, cast((c_int*1)(last_element_array_buffer), POINTER(c_uint)).contents)
gl.glBlendEquationSeparate(cast((c_int*1)(last_blend_equation_rgb), POINTER(c_uint)).contents,
cast((c_int*1)(last_blend_equation_alpha), POINTER(c_uint)).contents)
gl.glBlendFunc(cast((c_int*1)(last_blend_src), POINTER(c_uint)).contents,
cast((c_int*1)(last_blend_dst), POINTER(c_uint)).contents)
if last_enable_blend:
gl.glEnable(gl.GL_BLEND)
else:
gl.glDisable(gl.GL_BLEND)
if last_enable_cull_face:
gl.glEnable(gl.GL_CULL_FACE)
else:
gl.glDisable(gl.GL_CULL_FACE)
if last_enable_depth_test:
gl.glEnable(gl.GL_DEPTH_TEST)
else:
gl.glDisable(gl.GL_DEPTH_TEST)
if last_enable_scissor_test:
gl.glEnable(gl.GL_SCISSOR_TEST)
else:
gl.glDisable(gl.GL_SCISSOR_TEST)
gl.glViewport(last_viewport[0], last_viewport[1], last_viewport[2], last_viewport[3])
gl.glScissor(last_scissor_box[0], last_scissor_box[1], last_scissor_box[2], last_scissor_box[3])
def set_uniform_matrix(self, name, mat):
location = gl.glGetUniformLocation(self.program, name.encode('ascii'))
gl.glUniformMatrix4fv(location, 1, False, (ct.c_float * 16)(*mat))
def __call__(self,
voxpaint,
drawing,
altitude: float = 120,
azimuth: float = 45,
spin: bool = False):
size = drawing.size
depth = drawing.shape[2]
colors = drawing.palette.colors
x = math.sin(math.pi / 3)
altitude = math.radians(altitude)
azimuth = math.radians(azimuth)
mesh = self._get_mesh(drawing, drawing.version,
drawing.hidden_layers_by_axis)
if not mesh:
# TODO hacky
self.texture and self.texture[0].clear()
return
w, h = size
vw = int(w * math.sqrt(2))
vh = int(h + math.sqrt(2) * h // 2)
view_size = (vw, vh)
model_matrix = (Matrix4.new_scale(1, 1, 1 / x).translate(
-w // 2, -h // 2, depth // 2 - 1 / 2))
far = w * 2
near = -w * 2
frust = Matrix4()
frust[:] = (2 / vw, 0, 0, 0, 0, 2 / vh, 0, 0, 0, 0, -2 / (far - near),
0, 0, 0, -(far + near) / (far - near), 1)
offscreen_buffer = self._get_buffer(view_size)
with offscreen_buffer, self.program, \
enabled(gl.GL_DEPTH_TEST), disabled(gl.GL_CULL_FACE):
azimuth = time() if spin else azimuth
view_matrix = (
Matrix4.new_translate(0, 0, -1).rotatex(altitude).rotatez(
azimuth) # Rotate over time
)
colors = self._get_colors(colors)
gl.glUniform4fv(3, 256, colors)
gl.glUniformMatrix4fv(
0, 1, gl.GL_FALSE,
gl_matrix(frust * view_matrix * model_matrix))
gl.glViewport(0, 0, vw, vh)
gl.glPointSize(1)
mesh.draw(mode=gl.GL_POINTS)
final_buffer = self._get_final_buffer(view_size)
with self._vao, final_buffer, self._copy_program, disabled(
gl.GL_CULL_FACE, gl.GL_DEPTH_TEST):
with offscreen_buffer["color"], offscreen_buffer[
"normal"], offscreen_buffer["position"]:
gl.glDrawArrays(gl.GL_TRIANGLES, 0, 6)
# TODO must be careful here so that the texture is always valid
# (since imgui may read it at any time) Find a way to ensure this.
texture = self._get_texture(view_size)
gl.glCopyImageSubData(final_buffer["color"].name, gl.GL_TEXTURE_2D, 0,
0, 0, 0, texture.name, gl.GL_TEXTURE_2D, 0, 0, 0,
0, vw, vh, 1)
self.texture = texture, view_size
def uniform_matrixf(self, name, mat):
# obtian the uniform location
loc = GL.glGetUniformLocation(self.Handle, name)
# uplaod the 4x4 floating point matrix
GL.glUniformMatrix4fv(loc, 1, False, (ctypes.c_float * 16)(*mat))
def uniform_matrixf(self, name, mat, loc=None):
"""Send 4x4 NumPy matrix data as a uniform to the shader, named 'name'. Shader must be already bound."""
# obtain the uniform location
if not loc:
loc = self.get_uniform_location(name)
gl.glUniformMatrix4fv(loc, 1, False, (c_float * 16)(*mat)) # uplaod the 4x4 floating point matrix
def _umat4(uniform, matrix):
data_array = (gl.GLfloat * 16)(*matrix[:])
gl.glUniformMatrix4fv(uniform, 1, gl.GL_FALSE, data_array)
GLint: glGetUniformiv
}
UNIFORMS_DATA = {
# TypeIndentifier: (c_type, buffer_length, setter, [matrix_size])
GL_FLOAT: (GLfloat, 1, glUniform1fv),
GL_FLOAT_VEC2: (GLfloat, 2, glUniform2fv),
GL_FLOAT_VEC3: (GLfloat, 3, glUniform3fv),
GL_FLOAT_VEC4: (GLfloat, 4, glUniform4fv),
GL_INT: (GLint, 1, glUniform1iv),
GL_INT_VEC2: (GLint, 2, glUniform2iv),
GL_INT_VEC3: (GLint, 3, glUniform3iv),
GL_INT_VEC4: (GLint, 4, glUniform4iv),
GL_FLOAT_MAT2: (GLfloat, 4, lambda x,y,z: glUniformMatrix2fv(x,y,TRANSPOSE_MATRIX,z), (2,2)),
GL_FLOAT_MAT3: (GLfloat, 9, lambda x,y,z: glUniformMatrix3fv(x,y,TRANSPOSE_MATRIX,z), (3,3)),
GL_FLOAT_MAT4: (GLfloat, 16, lambda x,y,z: glUniformMatrix4fv(x,y,TRANSPOSE_MATRIX,z), (4,4)),
GL_FLOAT_MAT2x3: (GLfloat, 6, lambda x,y,z: glUniformMatrix2x3fv(x,y,TRANSPOSE_MATRIX,z), (2,3)),
GL_FLOAT_MAT2x4: (GLfloat, 8, lambda x,y,z: glUniformMatrix2x4fv(x,y,TRANSPOSE_MATRIX,z), (2,4)),
GL_FLOAT_MAT3x2: (GLfloat, 6, lambda x,y,z: glUniformMatrix3x2fv(x,y,TRANSPOSE_MATRIX,z), (3,2)),
GL_FLOAT_MAT3x4: (GLfloat, 12, lambda x,y,z: glUniformMatrix3x4fv(x,y,TRANSPOSE_MATRIX,z), (3,4)),
GL_FLOAT_MAT4x2: (GLfloat, 8, lambda x,y,z: glUniformMatrix4x2fv(x,y,TRANSPOSE_MATRIX,z), (4,2)),
GL_FLOAT_MAT4x3: (GLfloat, 12, lambda x,y,z: glUniformMatrix4x3fv(x,y,TRANSPOSE_MATRIX,z), (4,3)),
}
UNPACK_ARRAY = [GL_FLOAT, GL_INT]
to_seq = lambda x: x if isinstance(x, Sequence) else [x]
def as_matrix(values, size):
"Transform a flat list into a matrix"
row, col = size
GL_FLOAT_VEC2: (GLfloat, 2, glUniform2fv), GL_FLOAT_VEC3: (GLfloat, 3, glUniform3fv), GL_FLOAT_VEC4: (GLfloat, 4, glUniform4fv), GL_INT: (GLint, 1, glUniform1iv), GL_INT_VEC2: (GLint, 2, glUniform2iv), GL_INT_VEC3: (GLint, 3, glUniform3iv), GL_INT_VEC4: (GLint, 4, glUniform4iv), GL_FLOAT_MAT2: (GLfloat, 4, lambda x, y, z: glUniformMatrix2fv(x, y, TRANSPOSE_MATRIX, z), (2, 2)), GL_FLOAT_MAT3: (GLfloat, 9, lambda x, y, z: glUniformMatrix3fv(x, y, TRANSPOSE_MATRIX, z), (3, 3)), GL_FLOAT_MAT4: (GLfloat, 16, lambda x, y, z: glUniformMatrix4fv(x, y, TRANSPOSE_MATRIX, z), (4, 4)), GL_FLOAT_MAT2x3: (GLfloat, 6, lambda x, y, z: glUniformMatrix2x3fv(x, y, TRANSPOSE_MATRIX, z), (2, 3)), GL_FLOAT_MAT2x4: (GLfloat, 8, lambda x, y, z: glUniformMatrix2x4fv(x, y, TRANSPOSE_MATRIX, z), (2, 4)), GL_FLOAT_MAT3x2: (GLfloat, 6, lambda x, y, z: glUniformMatrix3x2fv(x, y, TRANSPOSE_MATRIX, z), (3, 2)), GL_FLOAT_MAT3x4: (GLfloat, 12, lambda x, y, z: glUniformMatrix3x4fv(x, y, TRANSPOSE_MATRIX, z), (3, 4)), GL_FLOAT_MAT4x2: (GLfloat, 8, lambda x, y, z: glUniformMatrix4x2fv(x, y, TRANSPOSE_MATRIX, z), (4, 2)),
def uniform_matrix(self, location, matrix):
gl.glUniformMatrix4fv(location, 1, gl.GL_FALSE, glm.value_ptr(matrix))
