def on_initialize(self, event):
gl.glClearColor(1, 1, 1, 1)
gl.glDisable(gl.GL_DEPTH_TEST)
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glEnable(GL.GL_VERTEX_PROGRAM_POINT_SIZE)
gl.glEnable(GL.GL_POINT_SPRITE)
def on_initialize(self, event):
gl.glClearColor(1,1,1,1)
gl.glEnable(gl.GL_DEPTH_TEST)
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc (gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glEnable(GL.GL_VERTEX_PROGRAM_POINT_SIZE)
gl.glEnable(GL.GL_POINT_SPRITE)
def paint():
n = 100
data = np.hstack(
(.2 * np.random.randn(n, 2), np.random.rand(n, 4))).astype(np.float32)
vs = compile_shader(VS, gl.GL_VERTEX_SHADER)
fs = compile_shader(FS, gl.GL_FRAGMENT_SHADER)
shaders_program = link_shader_program(vs, fs)
buffer = gl.glGenBuffers(1)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, buffer)
gl.glBufferData(gl.GL_ARRAY_BUFFER, data, gl.GL_STATIC_DRAW)
l = gl.glGetAttribLocation(shaders_program, "position")
gl.glVertexAttribPointer(l, 2, gl.GL_FLOAT, gl.GL_FALSE, 0, None)
gl.glEnableVertexAttribArray(l)
lc = gl.glGetAttribLocation(shaders_program, "color")
gl.glVertexAttribPointer(lc, 4, gl.GL_FLOAT, gl.GL_FALSE, 2 * 4, None)
gl.glEnableVertexAttribArray(lc)
gl.glUseProgram(shaders_program)
gl.glViewport(0, 0, 500, 500)
gl.glClearColor(0., 0., 0., 1.)
gl.glClear(gl.GL_COLOR_BUFFER_BIT | gl.GL_DEPTH_BUFFER_BIT)
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, buffer)
gl.glDrawArrays(gl.GL_TRIANGLE_STRIP, 0, data.shape[0])
def on_initialize(self, event):
gl.glClearColor(0,0,0,1);
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE)
gl.glEnable(GL.GL_VERTEX_PROGRAM_POINT_SIZE)
gl.glEnable(GL.GL_POINT_SPRITE)
def on_initialize(self, event):
gl.glClearColor(0, 0, 0, 1)
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE)
gl.glEnable(GL.GL_VERTEX_PROGRAM_POINT_SIZE)
gl.glEnable(GL.GL_POINT_SPRITE)
def on_initialize(self, event):
gl.glClearColor(0, 0, 0, 1)
# Enable blending
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE)
# Note: normal GL requires these lines, ES 2.0 does not
from OpenGL import GL
gl.glEnable(GL.GL_VERTEX_PROGRAM_POINT_SIZE)
gl.glEnable(GL.GL_POINT_SPRITE)
# Create shader program
self._prog_handle = gl.glCreateProgram()
# Create vertex shader
shader = gl.glCreateShader(gl.GL_VERTEX_SHADER)
gl.glShaderSource(shader, VERT_CODE)
gl.glCompileShader(shader)
status = gl.glGetShaderiv(shader, gl.GL_COMPILE_STATUS)
if not status:
# We could show more useful info here, but that takes a few lines
raise RuntimeError('Vertex shader did not compile.')
else:
gl.glAttachShader(self._prog_handle, shader)
# Create fragment shader
shader = gl.glCreateShader(gl.GL_FRAGMENT_SHADER)
gl.glShaderSource(shader, FRAG_CODE)
gl.glCompileShader(shader)
status = gl.glGetShaderiv(shader, gl.GL_COMPILE_STATUS)
if not status:
# We could show more useful info here, but that takes a few lines
raise RuntimeError('Fragment shader did not compile.')
else:
gl.glAttachShader(self._prog_handle, shader)
# Link
gl.glLinkProgram(self._prog_handle)
status = gl.glGetProgramiv(self._prog_handle, gl.GL_LINK_STATUS)
if not status:
# We could show more useful info here, but that takes a few lines
raise RuntimeError('Program did not link.')
# Create texture
self._tex_handle = gl.glGenTextures(1)
gl.glPixelStorei(gl.GL_UNPACK_ALIGNMENT, 1)
gl.glBindTexture(gl.GL_TEXTURE_2D, self._tex_handle)
gl.glTexImage2D(gl.GL_TEXTURE_2D, 0, gl.GL_LUMINANCE, im1.shape[1],
im1.shape[0], 0, gl.GL_LUMINANCE, gl.GL_FLOAT,
im1.astype(np.float32))
gl.glTexParameter(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MIN_FILTER,
gl.GL_LINEAR)
gl.glTexParameter(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MAG_FILTER,
gl.GL_LINEAR)
# Create vertex buffer
self._vbo_handle = gl.glGenBuffers(1)
def on_initialize(self, event):
gl.glClearColor(0,0,0,1)
gl.glDisable(gl.GL_DEPTH_TEST)
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc (gl.GL_SRC_ALPHA, gl.GL_ONE) #_MINUS_SRC_ALPHA)
gl.glEnable(GL.GL_VERTEX_PROGRAM_POINT_SIZE)
gl.glEnable(GL.GL_POINT_SPRITE)
# Start the timer upon initialization.
self.timer.start()
def on_initialize(self, event):
gl.glClearColor(0, 0, 0, 1)
gl.glDisable(gl.GL_DEPTH_TEST)
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE) #_MINUS_SRC_ALPHA)
gl.glEnable(GL.GL_VERTEX_PROGRAM_POINT_SIZE)
gl.glEnable(GL.GL_POINT_SPRITE)
# Start the timer upon initialization.
self.timer.start()
def on_initialize(self, event):
gl.glClearColor(0,0,0,1);
# Enable blending
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE)
# Note: normal GL requires these lines, ES 2.0 does not
from OpenGL import GL
gl.glEnable(GL.GL_VERTEX_PROGRAM_POINT_SIZE)
gl.glEnable(GL.GL_POINT_SPRITE)
# Create shader program
self._prog_handle = gl.glCreateProgram()
# Create vertex shader
shader = gl.glCreateShader(gl.GL_VERTEX_SHADER)
gl.glShaderSource(shader, VERT_CODE)
gl.glCompileShader(shader)
status = gl.glGetShaderiv(shader, gl.GL_COMPILE_STATUS)
if not status:
# We could show more useful info here, but that takes a few lines
raise RuntimeError('Vertex shader did not compile.')
else:
gl.glAttachShader(self._prog_handle, shader)
# Create fragment shader
shader = gl.glCreateShader(gl.GL_FRAGMENT_SHADER)
gl.glShaderSource(shader, FRAG_CODE)
gl.glCompileShader(shader)
status = gl.glGetShaderiv(shader, gl.GL_COMPILE_STATUS)
if not status:
# We could show more useful info here, but that takes a few lines
raise RuntimeError('Fragment shader did not compile.')
else:
gl.glAttachShader(self._prog_handle, shader)
# Link
gl.glLinkProgram(self._prog_handle)
status = gl.glGetProgramiv(self._prog_handle, gl.GL_LINK_STATUS)
if not status:
# We could show more useful info here, but that takes a few lines
raise RuntimeError('Program did not link.')
# Create texture
self._tex_handle = gl.glGenTextures(1)
gl.glPixelStorei(gl.GL_UNPACK_ALIGNMENT, 1)
gl.glBindTexture(gl.GL_TEXTURE_2D, self._tex_handle)
gl.glTexImage2D(gl.GL_TEXTURE_2D, 0, gl.GL_LUMINANCE,
im1.shape[1], im1.shape[0], 0, gl.GL_LUMINANCE, gl.GL_FLOAT,
im1.astype(np.float32))
gl.glTexParameter(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MIN_FILTER, gl.GL_LINEAR)
gl.glTexParameter(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MAG_FILTER, gl.GL_LINEAR)
# Create vertex buffer
self._vbo_handle = gl.glGenBuffers(1)
def on_initialize(self, event):
gl.glClearColor(0,0,0,1);
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE)
# todo: normal GL requires these lines, ES 2.0 does not
from OpenGL import GL
gl.glEnable(GL.GL_VERTEX_PROGRAM_POINT_SIZE)
gl.glEnable(GL.GL_POINT_SPRITE)
def on_initialize(self, event):
gl.glClearColor(1,1,1,1)
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc (gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
# Enable point sprites (allow to change the size of the points with
# gl_PointSize in the vertex shader)
# NOTE: this should not be necessary in futere versions of vispy
gl.glEnable(GL.GL_VERTEX_PROGRAM_POINT_SIZE)
gl.glEnable(GL.GL_POINT_SPRITE)
def paint():
n = 100
data = np.hstack((
.2 * np.random.randn(n, 2),
np.random.rand(n, 4)
)).astype(np.float32)
vs = compile_shader(VS, gl.GL_VERTEX_SHADER)
fs = compile_shader(FS, gl.GL_FRAGMENT_SHADER)
shaders_program = link_shader_program(vs, fs)
buffer = gl.glGenBuffers(1)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, buffer)
gl.glBufferData(gl.GL_ARRAY_BUFFER, data, gl.GL_STATIC_DRAW)
l = gl.glGetAttribLocation(shaders_program, "position")
gl.glVertexAttribPointer(l, 2, gl.GL_FLOAT, gl.GL_FALSE, 0, None)
gl.glEnableVertexAttribArray(l);
lc = gl.glGetAttribLocation(shaders_program, "color")
gl.glVertexAttribPointer(lc, 4, gl.GL_FLOAT, gl.GL_FALSE, 2 * 4, None)
gl.glEnableVertexAttribArray(lc);
gl.glUseProgram(shaders_program)
gl.glViewport(0, 0, 500, 500)
gl.glClearColor(0., 0., 0., 1.)
gl.glClear(gl.GL_COLOR_BUFFER_BIT | gl.GL_DEPTH_BUFFER_BIT)
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, buffer)
gl.glDrawArrays(gl.GL_TRIANGLE_STRIP, 0, data.shape[0])
