triangle = [
0.0, 0.8, # A
-0.6, -0.8, # B
0.6, -0.8 # C
]
# We have to pack the floats
packed_triangle = struct.pack('6f', *triangle)
# Now lets create a vertex buffer "containing" our triangle
vbo = GL.NewVertexBuffer(packed_triangle)
# Now we will create a VertexArray and specify what vertex attributes will be used during the rendering
# The first parameter is a program object used for rendering
# The second parameter is a VertexBuffer holding information about the triangle
# The third parameter is the format of a single vertex
# Now we only define the position as 2 float x and y coordinate
# Later we can define color normals or any other data used in the vertex shader.
# The fourth parameter must be a list containing a vertex attribute name in the vertex shader
vao = GL.NewVertexArray(prog, vbo, '2f', ['vert'])
while WND.Update():
GL.Clear(240, 240, 240)
# Render a triangle using 3 vertices (remember we have 6 floats 3 * 2f)
# RenderTriangles will use the program assigned to vao
# By default the specified attribues are enabled (for now we have a single "vert" attribute)
GL.RenderTriangles(vao, 3)
0.0,
0.0,
# B
-0.5,
0.86,
0.0,
1.0,
0.0,
# C
-0.5,
-0.86,
0.0,
0.0,
1.0,
]
packed_triangle = struct.pack('15f', *triangle)
vbo = GL.NewVertexBuffer(packed_triangle)
vao = GL.NewVertexArray(prog, vbo, '2f3f', ['vert', 'vert_color'])
width, height = WND.GetSize()
while WND.Update():
GL.Clear(240, 240, 240)
GL.SetUniform(prog['rotate'], WND.GetTime())
GL.SetUniform(prog['scale'], height / width * 0.75, 0.75)
GL.RenderTriangles(vao, 3, instances=10)
def draw(self, *args):
GL.Clear(240, 240, 240)
GL.RenderTriangles(self.vao, 3)
def on_draw(): GL.Clear(240, 240, 240) GL.SetUniform(prog['rotation'], elapsed) GL.RenderTriangles(vao, 3)
def display():
GL.Clear(240, 240, 240)
GL.RenderTriangles(vao, 3)
glutSwapBuffers()
def paintGL(self):
GL.Clear(240, 240, 240)
GL.EnableOnly(GL.ENABLE_BLEND + GL.ENABLE_MULTISAMPLE)
GL.SetUniform(context['rotation'], time.time() - context['start'])
GL.RenderTriangles(context['vao'], 3, instances=10)
self.update()
def display(): GL.Clear(240, 240, 240) GL.SetUniform(prog['rotation'], time.time() - start) GL.RenderTriangles(vao, 3) glutSwapBuffers()
def paintGL(self):
GL.Clear(240, 240, 240)
GL.SetUniform(context['rotation'], time.time() - context['start'])
GL.RenderTriangles(context['vao'], 3)
self.update()
def on_draw():
GL.Clear(240, 240, 240)
GL.RenderTriangles(vao, 3)
enables = [
GL.ENABLE_BLEND,
GL.ENABLE_CULL_FACE,
GL.ENABLE_DEPTH_TEST,
GL.ENABLE_BLEND + GL.ENABLE_DEPTH_TEST,
GL.ENABLE_CULL_FACE + GL.ENABLE_BLEND,
GL.ENABLE_BLEND + GL.ENABLE_DEPTH_TEST + GL.ENABLE_CULL_FACE,
]
GL.Viewport(0, 0, 256, 256)
for i, (fbo, color, depth) in enumerate(nodes):
GL.UseFramebuffer(fbo)
GL.Clear(*bg[i])
GL.EnableOnly(enables[i])
GL.RenderTriangles(vao, 18)
for i, (fbo, color, depth) in enumerate(nodes):
GL.UpdateTexture(color, i * 8 + 8, 8, 8, 8, b'\x00' * 256)
GL.UpdateTexture(color, i * 8 + 8, 24, 8, 8, b'\xff' * 256)
for i, (fbo, color, depth) in enumerate(nodes):
GL.UseFramebuffer(fbo)
Image.frombytes('RGB', (256, 256), GL.ReadPixels(0, 0, 256, 256, 3)).save('TestResults/c_%d.png' % i)
pixels = b''.join(struct.pack('B', int(c * 255)) for c in struct.unpack('65536f', GL.ReadDepthPixels(0, 0, 256, 256)))
Image.frombytes('L', (256, 256), pixels).save('TestResults/d_%d.png' % i)
exit()
GL.DisableBlend()
GL.DisableCullFace()
def on_draw():
GL.Clear(240, 240, 240)
GL.SetUniform(prog['rotation'], time.time() - start)
GL.RenderTriangles(vao, 3)
def display():
GL.Clear(240, 240, 240)
GL.EnableOnly(GL.ENABLE_BLEND + GL.ENABLE_MULTISAMPLE)
GL.SetUniform(prog['rotation'], time.time() - start)
GL.RenderTriangles(vao, 3, instances=10)
glutSwapBuffers()
def paintGL(self): GL.Clear(240, 240, 240) if 'vao' in context: GL.RenderTriangles(context['vao'], 3)
def on_draw():
GL.Clear(240, 240, 240)
GL.EnableOnly(GL.ENABLE_BLEND + GL.ENABLE_MULTISAMPLE)
GL.SetUniform(prog['rotation'], elapsed)
GL.RenderTriangles(vao, 3, instances=10)