def main():
w = 640
h = 480
gl = OsContext(w, h, typ=GL_FLOAT)
gl.Viewport(0, 0, w, h)
gl.MatrixMode(GL_PROJECTION)
gl.LoadIdentity()
gl.MatrixMode(GL_MODELVIEW)
gl.LoadIdentity()
gl.Enable(GL_DEPTH_TEST)
gl.PolygonMode(GL_FRONT_AND_BACK, GL_FILL)
gl.Disable(GL_LIGHTING)
gl.Disable(GL_CULL_FACE)
gl.PixelStorei(GL_PACK_ALIGNMENT, 1)
gl.PixelStorei(GL_UNPACK_ALIGNMENT, 1)
gl.Clear(GL_COLOR_BUFFER_BIT)
gl.Clear(GL_DEPTH_BUFFER_BIT)
v = np.random.rand(9).reshape((-1, 3))
f = np.arange(v.size, dtype=np.uint32)
gl.EnableClientState(GL_VERTEX_ARRAY)
gl.VertexPointer(v)
if True:
program = gl.CreateProgram()
fs = gl.CreateShader(GL_FRAGMENT_SHADER)
gl.ShaderSource(fs, 1, fs_source, len(fs_source))
vs = gl.CreateShader(GL_VERTEX_SHADER)
gl.ShaderSource(vs, 1, vs_source, len(vs_source))
gl.AttachShader(program, vs)
gl.AttachShader(program, fs)
gl.LinkProgram(program)
gl.UseProgram(program)
print('glValidateProgram: ' + str(gl.ValidateProgram(program)))
print('glGetProgramInfoLog ' + str(gl.GetProgramInfoLog(program)))
print('GL_MAX_VERTEX_ATTRIBS: ' +
str(gl.GetInteger(GL_MAX_VERTEX_ATTRIBS)))
gl.DrawElements(GL_TRIANGLES, f)
im = gl.getImage()
cv2.imshow('a', im)
import pdb
pdb.set_trace()
def main():
w = 640
h = 480
gl = OsContext(w, h, typ=GL_FLOAT)
gl.Viewport(0, 0, w, h)
gl.Enable(GL_DEPTH_TEST)
gl.PolygonMode(GL_FRONT_AND_BACK, GL_FILL)
# gl.Disable(GL_LIGHTING); # causes error
gl.Disable(GL_CULL_FACE)
gl.PixelStorei(GL_PACK_ALIGNMENT, 1)
gl.PixelStorei(GL_UNPACK_ALIGNMENT, 1)
gl.Clear(GL_COLOR_BUFFER_BIT)
gl.Clear(GL_DEPTH_BUFFER_BIT)
vertices = np.random.rand(9).reshape((-1, 3)).ravel()
#vertices = np.ones(9) * .5
#vertices = np.arange(9).astype(np.float64)
colors = np.ones_like(vertices).ravel()
f = np.arange(vertices.size, dtype=np.uint32)
#gl.EnableClientState(GL_VERTEX_ARRAY)
#gl.VertexPointer(v)
############################
# ENABLE SHADER
program = gl.CreateProgram()
fs = gl.CreateShader(GL_FRAGMENT_SHADER)
gl.ShaderSource(fs, 1, fs_source, len(fs_source))
vs = gl.CreateShader(GL_VERTEX_SHADER)
gl.ShaderSource(vs, 1, vs_source, len(vs_source))
gl.AttachShader(program, vs)
gl.AttachShader(program, fs)
gl.BindFragDataLocation(program, 0, "outputF")
gl.LinkProgram(program)
vertexLoc = gl.GetAttribLocation(program, "position")
colorLoc = gl.GetAttribLocation(program, "color")
projMatrixLoc = gl.GetUniformLocation(program, "projMatrix")
viewMatrixLoc = gl.GetUniformLocation(program, "viewMatrix")
gl.UseProgram(program)
#############################
# CREATE VERTEX ARRAY OBJECT
vao = gl.GenVertexArrays(3)
gl.BindVertexArray(vao[0])
buffers = gl.GenBuffers(3)
# VERTICES
gl.BindBuffer(GL_ARRAY_BUFFER, buffers[0])
gl.BufferData(GL_ARRAY_BUFFER, vertices, GL_STATIC_DRAW)
gl.VertexAttribPointer(vertexLoc, 3, GL_DOUBLE, 0, 0)
gl.EnableVertexAttribArray(vertexLoc)
# COLORS
gl.BindBuffer(GL_ARRAY_BUFFER, buffers[1])
gl.BufferData(GL_ARRAY_BUFFER, colors, GL_STATIC_DRAW)
gl.VertexAttribPointer(colorLoc, 3, GL_DOUBLE, 0, 0)
gl.EnableVertexAttribArray(colorLoc)
# TRIANGULATION
gl.BindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffers[2])
gl.BufferData(GL_ELEMENT_ARRAY_BUFFER, f, GL_STATIC_DRAW)
# PROJECTION MATRICES
projMatrix = np.eye(4, dtype=np.float64)
viewMatrix = np.eye(4, dtype=np.float64)
gl.UniformMatrix4fv(projMatrixLoc, 1, 0, projMatrix)
gl.UniformMatrix4fv(viewMatrixLoc, 1, 0, viewMatrix)
###############################
# DRAWING
gl.BindVertexArray(vao[0])
gl.DrawElements2(GL_TRIANGLES, f.size, GL_UNSIGNED_INT)
print('glValidateProgram: ' + str(gl.ValidateProgram(program)))
print('glGetProgramInfoLog ' + str(gl.GetProgramInfoLog(program)))
print('GL_MAX_VERTEX_ATTRIBS: ' +
str(gl.GetInteger(GL_MAX_VERTEX_ATTRIBS)))
im = gl.getImage()
cv2.imshow('a', im)
print(gl.GetError())
import pdb
pdb.set_trace()