def render(self):
GL.glClearColor(0, 0, 0, 1)
GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
# active shader program
GL.glUseProgram(self.shaderProgram)
'''
# Update the uniform color
tval = time.time()
green = (numpy.sin(tval)/2) + 0.5
vertexColorLocation = GL.glGetUniformLocation(shaderProgram, 'ourColor')
GL.glUniform4f(vertexColorLocation, 0.0, green, 0.0, 1.0)
'''
try:
GL.glBindVertexArray(self.VAO)
# Draw a triangle
# GL.glDrawArrays(GL.GL_TRIANGLES, 0, 3)
# draw triangle, starting index of the vertex array, # of vertices (6 = indexData.size),
# EBO indexes remain the same (accounts for stride of extra data
GL.glDrawElements(GL.GL_TRIANGLES, self.index_size, GL.GL_UNSIGNED_INT, None)
finally:
# Unbind when we finish
GL.glBindVertexArray(0)
GL.glUseProgram(0)
def init():
initialize_program()
initialize_vertex_buffer()
n = 1
vao_array = GL.arrays.GLuintArray.zeros((n,))
GL.glBindVertexArray( vao_array )
def render(shader, vao, tex, tex2):
gl.glClearColor(0.2, 0.3, 0.3, 0.4)
gl.glClear(gl.GL_COLOR_BUFFER_BIT|gl.GL_DEPTH_BUFFER_BIT)
gl.glBindTexture(gl.GL_TEXTURE_2D, tex)
gl.glUseProgram(shader)
gl.glActiveTexture(gl.GL_TEXTURE0)
gl.glBindTexture(gl.GL_TEXTURE_2D, tex)
gl.glUniform1i(gl.glGetUniformLocation(shader, "ourTexture1"), 0)
gl.glActiveTexture(gl.GL_TEXTURE1)
gl.glBindTexture(gl.GL_TEXTURE_2D, tex2)
gl.glUniform1i(gl.glGetUniformLocation(shader, "ourTexture2"), 1)
view = gl.glGetUniformLocation(shader, "view")
view_matrix = array([
[0.8, 0, 0, 0],
[0, 0.8, 0, 0],
[0, 0, 0.8, -4],
[0, 0, 0, 1],
])
gl.glUniformMatrix4fv(view, 1, gl.GL_TRUE, view_matrix)
projection = gl.glGetUniformLocation(shader, "projection")
projection_matrix = get_projection_matrix(45, WINDOW_WIDTH/WINDOW_HEIGHT, 0.1, 100)
gl.glUniformMatrix4fv(projection, 1, gl.GL_FALSE, projection_matrix)
gl.glBindVertexArray(vao)
for idx in range(0, len(CUBEPOSITIONS)):
model = gl.glGetUniformLocation(shader, "model")
angel = glfw.get_time()%360
model_matrix = get_model_matrix(idx, angel)
gl.glUniformMatrix4fv(model, 1, gl.GL_TRUE, model_matrix)
gl.glDrawArrays(gl.GL_TRIANGLES, 0, VERTEXS.size)
gl.glBindVertexArray(0)
gl.glUseProgram(0)
def create_object(shader):
# Create a new VAO (Vertex Array Object) and bind it
vertex_array_object = GL.glGenVertexArrays(1)
GL.glBindVertexArray( vertex_array_object )
# Generate buffers to hold our vertices
vertex_buffer = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, vertex_buffer)
# Get the position of the 'position' in parameter of our shader and bind it.
position = GL.glGetAttribLocation(shader, 'position')
GL.glEnableVertexAttribArray(position)
coord = GL.glGetAttribLocation(shader, 'coord')
GL.glEnableVertexAttribArray(coord)
# Describe the 'position' data layout in the buffer
GL.glVertexAttribPointer(position, 2, GL.GL_FLOAT, False, 16, GL.GLvoidp(0))
GL.glVertexAttribPointer(coord, 2, GL.GL_FLOAT, False, 16, GL.GLvoidp(8))
# Send the data over to the buffer
GL.glBufferData(GL.GL_ARRAY_BUFFER, 96, vertices, GL.GL_STATIC_DRAW)
# Unbind the VAO first (Important)
GL.glBindVertexArray(0)
# Unbind other stuff
GL.glDisableVertexAttribArray(position)
GL.glDisableVertexAttribArray(coord)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, 0)
return vertex_array_object
def __init__(self, name, vertices, indices):
self.name = name
assert len(indices) % 3 == 0
self.numTriangles = len(indices) / 3
vertex_data = vertices if isinstance(vertices, numpy.ndarray) else numpy.concatenate(vertices)
index_data = numpy.array(indices, dtype=numpy.uint32)
self.vao = GL.glGenVertexArrays(1)
GL.glBindVertexArray(self.vao)
self.vbo, self.ibo = GL.glGenBuffers(2)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, self.vbo)
GL.glBindBuffer(GL.GL_ELEMENT_ARRAY_BUFFER, self.ibo)
self.program = BlinnWithoutNormalsProgram.get()
GL.glEnableVertexAttribArray(self.program.attrib_position)
GL.glVertexAttribPointer(self.program.attrib_position, 3, GL.GL_FLOAT, False, 3*SIZE_OF_FLOAT32, ctypes.c_void_p(0))
# Send the data over to the buffer
GL.glBufferData(GL.GL_ARRAY_BUFFER, len(vertex_data) * SIZE_OF_FLOAT32, vertex_data.astype(numpy.float32, copy=False), GL.GL_STATIC_DRAW)
GL.glBufferData(GL.GL_ELEMENT_ARRAY_BUFFER, len(index_data) * SIZE_OF_UNSIGNED32, index_data, GL.GL_STATIC_DRAW)
# Unbind the VAO first (Important)
GL.glBindVertexArray(0)
# Unbind other stuff
GL.glDisableVertexAttribArray(self.program.attrib_position)
GL.glBindBuffer(GL.GL_ELEMENT_ARRAY_BUFFER, 0)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, 0)
def init(self):
self.vao = GL.glGenVertexArrays(1)
GL.glBindVertexArray(self.vao)
self.initializeProgram()
self.initializeVertexBuffer()
colorDataOffset = 3*self.float_size*self.numberOfVertices
GL.glBindBuffer(GL.GL_ARRAY_BUFFER,self.vertexBufferObject)
GL.glEnableVertexAttribArray(0)
GL.glEnableVertexAttribArray(1)
GL.glVertexAttribPointer(0, 3, GL.GL_FLOAT, GL.GL_FALSE, 0, None)
GL.glVertexAttribPointer(1, 4, GL.GL_FLOAT, GL.GL_FALSE, 0, GL.GLvoidp(colorDataOffset))
GL.glBindBuffer(GL.GL_ELEMENT_ARRAY_BUFFER,self.indexBufferObject)
GL.glBindVertexArray(0)
GL.glEnable(GL.GL_CULL_FACE)
GL.glCullFace(GL.GL_BACK)
GL.glFrontFace(GL.GL_CW)
GL.glEnable(GL.GL_DEPTH_TEST)
GL.glDepthMask(GL.GL_TRUE)
GL.glDepthFunc(GL.GL_LESS)
GL.glDepthRange(0.0, 1.0)
def render():
global shaderProgram
global VAO
global EBO
global indexData
GL.glClearColor(0, 0, 0, 1)
GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
# active shader program
GL.glUseProgram(shaderProgram)
try:
GL.glBindVertexArray(VAO)
# Draw a triangle
# GL.glDrawArrays(GL.GL_TRIANGLES, 0, 3)
# draw triangle, starting index of the vertex array, # of vertices (6 = indexData.size),
GL.glDrawElements(GL.GL_TRIANGLES, indexData.size, GL.GL_UNSIGNED_INT, None)
finally:
# Unbind when we finish
GL.glBindVertexArray(0)
GL.glUseProgram(0)
def trial(self):
# glfw.make_context_current(self.window)
# self.gui_lock.acquire()
vertexData = np.array([0.0, 0.5, 0.0, 1.0,
0.5, -0.366, 0.0, 1.0,
-0.5, -0.366, 0.0, 1.0,
1.0, 0.0, 0.0, 1.0,
0.0, 1.0, 0.0, 1.0,
0.0, 0.0, 1.0, 1.0, ],
dtype=np.float32)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self._VBO)
# gl.glBufferData(gl.GL_ARRAY_BUFFER, vertexData.nbytes, vertexData, gl.GL_STATIC_DRAW)
# enable array and set up data
gl.glEnableVertexAttribArray(0)
gl.glEnableVertexAttribArray(1)
gl.glVertexAttribPointer(0, 4, gl.GL_FLOAT, gl.GL_FALSE, 0, None)
# the last parameter is a pointer
# python donot have pointer, have to using ctypes
gl.glVertexAttribPointer(1, 4, gl.GL_FLOAT, gl.GL_FALSE, 0, ctypes.c_void_p(48))
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, 0)
gl.glBindVertexArray(0)
def init(self):
super(BasicWindow, self).init()
vert_shader = compileShader(vert_shader_source, GL.GL_VERTEX_SHADER)
frag_shader = compileShader(frag_shader_source, GL.GL_FRAGMENT_SHADER)
self.shader = game_core.ShaderProgram(vert_shader, frag_shader)
self.ndc_vao = GL.glGenVertexArrays(1)
GL.glBindVertexArray(self.ndc_vao)
vertex_buffer = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, vertex_buffer)
data = [
-1.0, -1.0, 0.0,
0.0, 1.0, 0.0,
1.0, -1.0, 0.0,
]
array_type = (GL.GLfloat*len(data))
GL.glBufferData(
GL.GL_ARRAY_BUFFER,
len(data)*game_core.FLOAT_SIZE,
array_type(*data),
GL.GL_STATIC_DRAW
)
GL.glEnableVertexAttribArray(0)
GL.glVertexAttribPointer(0, 3, GL.GL_FLOAT, GL.GL_FALSE, 0, None)
GL.glBindVertexArray(0)
def draw(self):
assert threading.current_thread() is threading.main_thread()
if self.dirty or not self.vao:
self.bind()
assert opengl_current_context() == self.context, "Cannot invoke Renderer from a different OpenGL context"
gl.glBindVertexArray(self.vao)
indexed = (self.indices is not None)
if self.command == "points":
mode = gl.GL_POINTS
elif self.command == "lines":
mode = gl.GL_LINES
elif self.command == "triangles":
mode = gl.GL_TRIANGLES
elif self.command == "triangle_strip":
mode = gl.GL_TRIANGLE_STRIP
elif self.command == "triangle_fan":
mode = gl.GL_TRIANGLE_FAN
else:
raise ValueError(self.command)
if not indexed:
if not self.instanced:
gl.glDrawArrays(mode, 0, self.length)
else:
gl.glDrawArraysInstanced(mode, 0, self.length, self.instances)
else:
if not self.instanced:
gl.glDrawElements(mode, self.indices.length,
self.indices.gl_dtype, ctypes.c_void_p(self.indices.offset))
else:
gl.glDrawElementsInstanced(mode, self.indices.length,
self.indices.gl_dtype, ctypes.c_void_p(self.indices.offset),
self.instances)
def __init__(self, vertices, normals, indices, draw_method):
self.draw_method = draw_method
self.indices = indices
self.vao = GL.glGenVertexArrays(1)
GL.glBindVertexArray(self.vao)
vertexBufferObject = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, vertexBufferObject)
data = vertices + normals
array_type = (GL.GLfloat*len(data))
GL.glBufferData(
GL.GL_ARRAY_BUFFER,
len(data)*FLOAT_SIZE,
array_type(*data),
GL.GL_STATIC_DRAW)
GL.glEnableVertexAttribArray(0)
GL.glEnableVertexAttribArray(1)
GL.glVertexAttribPointer(0, 3, GL.GL_FLOAT, GL.GL_FALSE, 0, None)
GL.glVertexAttribPointer(1, 3, GL.GL_FLOAT, GL.GL_FALSE, 0, GL.GLvoidp(len(vertices)*FLOAT_SIZE))
indexBufferObject = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ELEMENT_ARRAY_BUFFER, indexBufferObject)
array_type = (GL.GLuint*len(self.indices))
GL.glBufferData(
GL.GL_ELEMENT_ARRAY_BUFFER,
len(self.indices)*FLOAT_SIZE,
array_type(*self.indices),
GL.GL_STATIC_DRAW)
GL.glBindVertexArray(0)
def initializeGL(self):
"""
Create the graphic buffers and compile the shaders.
"""
# Create and bind a new VAO (Vertex Array Object).
self.vertex_array_object = gl.glGenVertexArrays(1)
gl.glBindVertexArray(self.vertex_array_object)
# Upload color values (one for each triangle vertex) in RGB format.
colBuf = gl.glGenBuffers(1)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, colBuf)
col = np.array([1,0,0,0,1,0,0,0,1], dtype=np.float32)
gl.glBufferData(gl.GL_ARRAY_BUFFER, col, gl.GL_STATIC_DRAW)
gl.glVertexAttribPointer(0, 3, gl.GL_FLOAT, gl.GL_FALSE, 0, None)
gl.glEnableVertexAttribArray(0)
# Create and bind GPU buffer for vertex data.
self.vertexBuffer = gl.glGenBuffers(1)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self.vertexBuffer)
# Associate the vertex buffer with the "Layout 0" shader variable (look
# for "v_N" variable in vertex shader program).
gl.glVertexAttribPointer(1, 4, gl.GL_FLOAT, gl.GL_FALSE, 0, None)
gl.glEnableVertexAttribArray(1)
# Enable depth-sorting.
gl.glEnable(gl.GL_DEPTH_TEST)
gl.glDepthFunc(gl.GL_LESS)
# Background color.
gl.glClearColor(0, 0, 0, 0)
# Compile- and install shader programs.
self.shaders = self.linkShaders('blog4.vs', 'blog4.fs')
gl.glUseProgram(self.shaders)
def __init__(self, vertices, indices, draw_method):
from . import SHORT_SIZE, FLOAT_SIZE
self.draw_method = draw_method
self.indices = indices
self.vao = GL.glGenVertexArrays(1)
GL.glBindVertexArray(self.vao)
vertexBufferObject = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, vertexBufferObject)
array_type = (GL.GLfloat*len(vertices))
GL.glBufferData(
GL.GL_ARRAY_BUFFER,
len(vertices)*FLOAT_SIZE,
array_type(*vertices),
GL.GL_STATIC_DRAW)
GL.glEnableVertexAttribArray(0)
GL.glVertexAttribPointer(0, 3, GL.GL_FLOAT, GL.GL_FALSE, 0, None)
indexBufferObject = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ELEMENT_ARRAY_BUFFER, indexBufferObject)
array_type = (GL.GLushort*len(self.indices))
GL.glBufferData(
GL.GL_ELEMENT_ARRAY_BUFFER,
len(self.indices)*SHORT_SIZE,
array_type(*self.indices),
GL.GL_STATIC_DRAW)
GL.glBindVertexArray(0)
def setAttributes(self, data):
self.data = data
self.dataLen = data.shape[0]
# Make this buffer the default one
gl.glBindVertexArray(self.VAO)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self.buffer)
# Upload data
gl.glBufferData(gl.GL_ARRAY_BUFFER, data.nbytes, data, gl.GL_DYNAMIC_DRAW)
offset = 0
for i, name in enumerate(data.dtype.names):
# import ipdb; ipdb.set_trace()
stride = data[name].strides[0]
if data[name].ndim == 1:
size = 1
else:
size = data[name].shape[1]
loc = gl.glGetAttribLocation(self.program, name)
# remember these properties for later updating of buffer
self.attribute_layout[name] = {'offset':offset}
gl.glVertexAttribPointer(loc, size, gl.GL_FLOAT, False, stride, ctypes.c_void_p(offset))
gl.glEnableVertexAttribArray(loc)
offset += data.dtype[name].itemsize
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, 0)
gl.glBindVertexArray(0)
# ensure correct mask is rendered:
self.setMask()
def quad(self, g, quad):
# Enable alpha blending/transparency
self.vbuffer.sync()
gl.glUseProgram(self.program.id)
gl.glEnable(gl.GL_BLEND)
gl.glEnable(gl.GL_DEPTH_TEST)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
# Bind texture
gl.glUniform1i(self.program.tex, 0)
gl.glBindTexture(gl.GL_TEXTURE_2D, quad.texture.id)
# Set up geometry transforms
worldMatrix = Matrix.scale(quad.width, quad.height, 1)
worldMatrix = Matrix.translate(quad.x, quad.y, 0) * worldMatrix
worldViewProjectionMatrix = g.viewProjectionMatrix * worldMatrix
#worldViewProjectionMatrix = g.viewProjectionMatrix
gl.glUniformMatrix4fv(self.program.worldViewProjectionMatrix, 1, 0,
worldViewProjectionMatrix.data)
# Draw geometry
gl.glBindVertexArray(self.vao)
gl.glDrawArrays(gl.GL_TRIANGLE_STRIP, 0, 4)
gl.glBindVertexArray(0)
def draw():
"""Put the main drawing code in here."""
def inc(x, amount=1):
return (x + amount) % 4
def wlc(x):
return (x >> 4) | x
if chaem.stat == chaem.states.stop:
x, z = int((chaem.pos.z + 1) / 2), int((chaem.pos.x + 1) / 2)
spot = room[x][z]
dire = inc(int(round(chaem.heading * 2 / pi)), 1) # Get this into room coordinates (0-3)
for x in [3, 0, 1, 2]: # Check each side, starting with the right.
if not wlc(spot) & (2 ** (inc(dire, x))):
dire = inc(dire, x)
break
chaem.movdir = quaternion.from_y_rotation((dire - 1) * pi / 2) * vector([0., 0., -1.])
chaem.mochae(timedelta)
GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
GL.glUniformMatrix4fv(GL.glGetUniformLocation(shaderp, 'modelmatrix'), 1, False, modelmtx)
GL.glUniformMatrix4fv(GL.glGetUniformLocation(shaderp, 'viewmatrix'), 1, False, chaem.lookat())
GL.glBindVertexArray(architincture)
GL.glEnable(GL.GL_TEXTURE_2D)
GL.glBindTexture(GL.GL_TEXTURE_2D, terrain)
GL.glDrawArrays(GL.GL_QUADS, 0, len(vs))
GL.glBindTexture(GL.GL_TEXTURE_2D, 0)
GL.glBindVertexArray(0)
def draw_grid(self,):
gl.glUseProgram(self.simple_object_shader)
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glEnable(gl.GL_DEPTH_TEST)
gl.glDepthFunc(gl.GL_LESS)
gl.glBindVertexArray(self.grid_vao)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self.grid_vbo)
vProjection = gl.glGetUniformLocation(self.simple_object_shader, 'vProjection')
vPosisition = gl.glGetAttribLocation(self.simple_object_shader, "vPosisition")
vColor = gl.glGetAttribLocation(self.simple_object_shader, "vColor")
vCamera = gl.glGetUniformLocation(self.simple_object_shader, 'vCamera')
gl.glUniformMatrix4fv(vProjection, 1, gl.GL_FALSE, self.projection_matrix_function())
gl.glUniformMatrix4fv(vCamera, 1, gl.GL_FALSE, self.camera_matrix_function())
gl.glEnableVertexAttribArray(vPosisition)
gl.glEnableVertexAttribArray(vColor)
gl.glVertexAttribPointer(vPosisition, 4, gl.GL_FLOAT, gl.GL_FALSE, 0, None)
gl.glVertexAttribPointer(vColor, 4, gl.GL_FLOAT, gl.GL_FALSE, 0, ctypes.c_void_p(self.grid_size * 4))
gl.glDrawArrays(gl.GL_TRIANGLES, 0, self.grid_size / 4)
def bind(self):
assert threading.current_thread() is threading.main_thread()
length = None
first_atname = None
if self.instanced:
instances = None
instanced_first_atname = None
vao = gl.glGenVertexArrays(1)
gl.glBindVertexArray(vao)
if self.indices:
self.indices.bind()
for atname, at in self.attributes.items():
at.bind()
if at.instanced:
if instances is None:
instances = at.length
instanced_first_atname = atname
if instances != at.length:
raise ValueError((instanced_first_atname, instances), (atname, at.length))
else:
if length is None:
length = at.length
first_atname = atname
if length != at.length:
raise ValueError((first_atname, length), (atname, at.length))
if length is None:
length = 0
if self.instanced:
self.instances = instances
self.length = length
self.vao = vao
self.dirty = False
def draw(self, tutorial_object):
modelToCameraStack = MatrixStack()
GL.glUseProgram(tutorial_object.theProgram)
GL.glBindVertexArray(tutorial_object.vao)
modelToCameraStack.translate(self.posBase)
modelToCameraStack.rotateY(self.angBase)
# Draw left base
#
modelToCameraStack.push()
modelToCameraStack.translate(self.posBaseLeft)
modelToCameraStack.scale([1.0, 1.0, self.scaleBaseZ])
GL.glUniformMatrix4fv(tutorial_object.modelToCameraMatrixUnif, 1, GL.GL_FALSE, modelToCameraStack.top().tolist())
GL.glDrawElements(GL.GL_TRIANGLES, len(tutorial_object.indexData), GL.GL_UNSIGNED_SHORT, None)
modelToCameraStack.pop()
# Draw right base
#
modelToCameraStack.push()
modelToCameraStack.translate(self.posBaseRight)
modelToCameraStack.scale([1.0, 1.0, self.scaleBaseZ])
GL.glUniformMatrix4fv(tutorial_object.modelToCameraMatrixUnif, 1, GL.GL_FALSE, modelToCameraStack.top().tolist())
GL.glDrawElements(GL.GL_TRIANGLES, len(tutorial_object.indexData), GL.GL_UNSIGNED_SHORT, None)
modelToCameraStack.pop()
# Draw main arm
self.drawUpperArm(modelToCameraStack, tutorial_object)
GL.glBindVertexArray(0)
GL.glUseProgram(0)
def bind_attrib(self, attrib_id, size, data, storagetype=gl.GL_STATIC_DRAW, instance_divisor=0, datatype=gl.GL_FLOAT, stride=0, offset=None, normalize=False):
if RenderObject.bound_vao is not self.vao_id:
gl.glBindVertexArray(self.vao_id)
RenderObject.bound_vao = self.vao_id
# Keep track of max instance divisor
self.max_instance_divisor = max(instance_divisor, self.max_instance_divisor)
# If the input is an array create a new GL buffer, otherwise assume the buffer already exists and a buffer ID is passed
if type(data) is np.ndarray:
# Get an index to one new buffer in GPU mem, bind it, and copy the array data to it
buf_id = gl.glGenBuffers(1)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, buf_id)
gl.glBufferData(gl.GL_ARRAY_BUFFER, data.nbytes, data, storagetype)
else:
# Assume that a GLuint is passed which means that the buffer is already in GPU memory
buf_id = data
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, buf_id)
# Assign this buffer to one of the attributes in the shader
gl.glEnableVertexAttribArray(attrib_id)
gl.glVertexAttribPointer(attrib_id, size, datatype, normalize, stride, offset)
# For instanced data, indicate per how many instances we move a step in the buffer (1=per instance)
if instance_divisor > 0:
gl.glVertexAttribDivisor(attrib_id, instance_divisor)
# Clean up
gl.glDisableVertexAttribArray(attrib_id)
self.enabled_attributes[attrib_id] = [size, buf_id, instance_divisor, datatype]
return buf_id
def _draw_selection_box(self):
""" The drawing method for the selection box. Initially we will draw the
box boundaries with lines, and then fill the interior with two
triangles.
IMPORTANT!!!
THIS FUNCTION MUST BE CALLED ONLY WHEN AN OPENGL CONTEXT WINDOW HAS
BEEN CREATED AND INITIALIZED, OTHERWISE WILL RAISE AN ERROR IN THE
OPENGL WRAPPER!!!
YOU HAVE BEEN WARNED
"""
GL.glUseProgram(self.selection_box_program)
GL.glLineWidth(1)
GL.glBindVertexArray(self.vao)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, self.buffers[1])
GL.glBufferData(GL.GL_ARRAY_BUFFER, self.points.itemsize*int(len(self.points)), self.points, GL.GL_DYNAMIC_DRAW)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, self.buffers[0])
GL.glBufferData(GL.GL_ARRAY_BUFFER, self.indexes.itemsize*int(len(self.indexes)), self.indexes, GL.GL_DYNAMIC_DRAW)
GL.glDrawElements(GL.GL_LINE_STRIP, int(len(self.indexes)), GL.GL_UNSIGNED_INT, None)
GL.glEnable(GL.GL_DEPTH_TEST)
GL.glEnable(GL.GL_BLEND)
GL.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_SRC_ALPHA)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, self.buffers[0])
GL.glBufferData(GL.GL_ARRAY_BUFFER, self.triangles.itemsize*int(len(self.triangles)), self.triangles, GL.GL_DYNAMIC_DRAW)
GL.glDrawElements(GL.GL_TRIANGLE_STRIP, int(len(self.triangles)), GL.GL_UNSIGNED_INT, None)
GL.glDisable(GL.GL_BLEND)
GL.glDisable(GL.GL_DEPTH_TEST)
GL.glBindVertexArray(0)
GL.glUseProgram(0)
return True
def _make_gl_selection_box(self):
""" Creates the Vertex Array Object, Vertex Buffer Objects and fill the
shaders with the data of the corresponding points. Since we will use
two kind of drawing methods, lines and triangles, the index buffer
will set to GL_DYNAMIC_DRAW, so as the coordinates, but not the
colors, which will be set as GL_STATIC_DRAW.
"""
self.vao = GL.glGenVertexArrays(1)
GL.glBindVertexArray(self.vao)
ind_vbo = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ELEMENT_ARRAY_BUFFER, ind_vbo)
GL.glBufferData(GL.GL_ELEMENT_ARRAY_BUFFER, self.indexes.itemsize*int(len(self.indexes)), self.indexes, GL.GL_DYNAMIC_DRAW)
coord_vbo = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, coord_vbo)
GL.glBufferData(GL.GL_ARRAY_BUFFER, self.points.itemsize*int(len(self.points)), self.points, GL.GL_DYNAMIC_DRAW)
att_position = GL.glGetAttribLocation(self.selection_box_program, 'vert_coord')
GL.glEnableVertexAttribArray(att_position)
GL.glVertexAttribPointer(att_position, 2, GL.GL_FLOAT, GL.GL_FALSE, 2*self.points.itemsize, ctypes.c_void_p(0))
col_vbo = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, col_vbo)
GL.glBufferData(GL.GL_ARRAY_BUFFER, self.color.itemsize*int(len(self.color)), self.color, GL.GL_STATIC_DRAW)
att_colors = GL.glGetAttribLocation(self.selection_box_program, 'vert_color')
GL.glEnableVertexAttribArray(att_colors)
GL.glVertexAttribPointer(att_colors, 3, GL.GL_FLOAT, GL.GL_FALSE, 3*self.color.itemsize, ctypes.c_void_p(0))
GL.glBindVertexArray(0)
GL.glDisableVertexAttribArray(att_position)
GL.glDisableVertexAttribArray(att_colors)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, 0)
GL.glBindBuffer(GL.GL_ELEMENT_ARRAY_BUFFER, 0)
self.buffers = (ind_vbo, coord_vbo, col_vbo)
def init():
initialize_program()
initialize_vertex_buffer()
n = 1
vao_array = N.zeros(n, dtype=N.uint)
vao_array = GL.glGenVertexArrays(n)
GL.glBindVertexArray( vao_array )
def render(self):
gl.glClearColor(0, 0, 0, 1)
gl.glClear(gl.GL_COLOR_BUFFER_BIT | gl.GL_DEPTH_BUFFER_BIT)
with self.shader_prog:
# Activate array
gl.glBindVertexArray(self.vao_id)
# FIXME: Why does the following work? tex_uniform is 1,
# palette_uniform is 0, but I have to set the uniform for
# tex_uniform to 0 and the uniform for palette_uniform to 1.
# Obviously I'm not understanding something.
#
# See: http://stackoverflow.com/questions/26622204
# https://www.opengl.org/discussion_boards/showthread.php/174926-when-to-use-glActiveTexture
# Activate texture
print(self.tex_uniform, self.palette_uniform, self.sample_texture, self.palette_id)
gl.glActiveTexture(gl.GL_TEXTURE0 + self.tex_uniform)
gl.glBindTexture(gl.GL_TEXTURE_2D, self.sample_texture)
gl.glUniform1i(self.tex_uniform, 0)
# Activate palette texture
gl.glActiveTexture(gl.GL_TEXTURE0 + self.palette_uniform)
gl.glBindTexture(gl.GL_TEXTURE_BUFFER, self.palette_texture)
gl.glTexBuffer(gl.GL_TEXTURE_BUFFER, gl.GL_RGBA8, self.palette_id)
gl.glUniform1i(self.palette_uniform, 1)
# # Activate array
# gl.glBindVertexArray(self.vao_id)
# draw triangle
gl.glDrawArrays(gl.GL_TRIANGLE_STRIP, 0, 4)
def draw(self, **frame_data):
view = frame_data.get('view_matrix', None)
projection = frame_data.get('projection_matrix', None)
if self._before_draw:
self._before_draw(self, frame_data)
if view is not None:
self.world_matrix.dot(view, out=self._modelview)
self._normal[:] = np.linalg.inv(self._modelview[:3,:3].T)
for material, prims in self.primitives.items():
material.use(u_view=view, u_projection=projection, u_modelview=self._modelview,
u_modelview_inverse_transpose=self._normal, u_model=self.world_matrix,
frame_data=frame_data)
technique = material.technique
for prim in prims:
gl.glBindVertexArray(prim.vaos[technique])
gl.glBindBuffer(gl.GL_ELEMENT_ARRAY_BUFFER, prim.index_buffer)
gl.glDrawElements(prim.mode, prim.indices.size, DTYPE_COMPONENT_TYPE[prim.indices.dtype],
c_void_p(0))
if CHECK_GL_ERRORS:
err = gl.glGetError()
if err != gl.GL_NO_ERROR:
raise Exception('error drawing primitive elements: %d' % err)
gl.glBindVertexArray(0)
# for location in technique.attribute_locations.values():
# gl.glDisableVertexAttribArray(location)
material.release()
material.technique.release()
if self._after_draw:
self._after_draw(self, frame_data)
super().draw(**frame_data)
def init_gl(self, force=False):
if self._initialized and not force:
return
self._initialized = False
for material, prims in self.primitives.items():
material.init_gl(force=force)
technique = material.technique
for prim in prims:
prim.init_gl(force=force)
if technique in prim.vaos:
continue
vao = gl.glGenVertexArrays(1)
prim.vaos[technique] = vao
gl.glBindVertexArray(vao)
for attribute_name, location in technique.attribute_locations.items():
attribute = prim.attributes[attribute_name]
gl.glEnableVertexAttribArray(location)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, prim.buffers[attribute_name])
gl.glVertexAttribPointer(location, attribute.shape[-1],
DTYPE_COMPONENT_TYPE[attribute.dtype], False,
attribute.dtype.itemsize * attribute.shape[-1],
NULL_PTR)
if attribute_name in technique.attribute_divisors:
gl.glVertexAttribDivisor(location, technique.attribute_divisors[attribute_name])
gl.glBindVertexArray(0)
for location in technique.attribute_locations.values():
gl.glDisableVertexAttribArray(location)
err = gl.glGetError()
if err != gl.GL_NO_ERROR:
raise Exception('failed to init primitive: %s' % err)
_logger.info('%s.init_gl: OK' % self.__class__.__name__)
self._initialized = True
def drawCube(self, pos, ori, size, col=None):
#this function expects center of the cube, orientation, and size as (length(x), breadh(y), height(z))
# glfw.make_context_current(self.window)
# Draw Cube (multiple quads)
# self.gui_lock.acquire()
# gl.glBindVertexArray(self._VAO)
gl.glLoadIdentity()
gl.glTranslatef(pos[0],pos[1],pos[2])
gl.glScalef(size[0],size[1],size[0])
gl.glRotatef(ori[0],1.0,0.0,0.0)
gl.glRotatef(ori[1],0.0,1.0,0.0)
gl.glRotatef(ori[2],0.0,0.0,1.0)
# Draw Cube (multiple quads)
gl.glBegin(gl.GL_QUADS)
gl.glColor3f(0.0,1.0,0.0)
gl.glVertex3f( 1.0, 1.0,-1.0)
gl.glVertex3f(-1.0, 1.0,-1.0)
gl.glVertex3f(-1.0, 1.0, 1.0)
gl.glVertex3f( 1.0, 1.0, 1.0)
gl.glColor3f(1.0,0.0,0.0)
gl.glVertex3f( 1.0,-1.0, 1.0)
gl.glVertex3f(-1.0,-1.0, 1.0)
gl.glVertex3f(-1.0,-1.0,-1.0)
gl.glVertex3f( 1.0,-1.0,-1.0)
gl.glColor3f(0.0,1.0,0.0)
gl.glVertex3f( 1.0, 1.0, 1.0)
gl.glVertex3f(-1.0, 1.0, 1.0)
gl.glVertex3f(-1.0,-1.0, 1.0)
gl.glVertex3f( 1.0,-1.0, 1.0)
gl.glColor3f(1.0,1.0,0.0)
gl.glVertex3f( 1.0,-1.0,-1.0)
gl.glVertex3f(-1.0,-1.0,-1.0)
gl.glVertex3f(-1.0, 1.0,-1.0)
gl.glVertex3f( 1.0, 1.0,-1.0)
gl.glColor3f(0.0,0.0,1.0)
gl.glVertex3f(-1.0, 1.0, 1.0)
gl.glVertex3f(-1.0, 1.0,-1.0)
gl.glVertex3f(-1.0,-1.0,-1.0)
gl.glVertex3f(-1.0,-1.0, 1.0)
gl.glColor3f(1.0,0.0,1.0)
gl.glVertex3f( 1.0, 1.0,-1.0)
gl.glVertex3f( 1.0, 1.0, 1.0)
gl.glVertex3f( 1.0,-1.0, 1.0)
gl.glVertex3f( 1.0,-1.0,-1.0)
gl.glEnd()
gl.glBindVertexArray(0)
def _make_sel_gl_dots(program, vismol_object = None, bckgrnd_color= [1.0,1.0,1.0,1.0]):
""" Function doc
"""
colors = vismol_object.color_indexes
dot_sizes = vismol_object.vdw_dot_sizes
coords = vismol_object.frames[0]
dot_qtty = int(len(coords)/3)
bckgrnd_color = [bckgrnd_color[0],bckgrnd_color[1],
bckgrnd_color[2],bckgrnd_color[3]]*dot_qtty
bckgrnd_color = np.array(bckgrnd_color, dtype=np.float32)
indexes = np.array(vismol_object.dot_indexes,dtype=np.uint32)
vao = GL.glGenVertexArrays(1)
GL.glBindVertexArray(vao)
ind_vbo = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ELEMENT_ARRAY_BUFFER, ind_vbo)
GL.glBufferData(GL.GL_ELEMENT_ARRAY_BUFFER, indexes.itemsize*int(len(indexes)), indexes, GL.GL_DYNAMIC_DRAW)
coord_vbo = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, coord_vbo)
GL.glBufferData(GL.GL_ARRAY_BUFFER, coords.itemsize*int(len(coords)), coords, GL.GL_STATIC_DRAW)
att_position = GL.glGetAttribLocation(program, 'vert_coord')
GL.glEnableVertexAttribArray(att_position)
GL.glVertexAttribPointer(att_position, 3, GL.GL_FLOAT, GL.GL_FALSE, 3*coords.itemsize, ctypes.c_void_p(0))
col_vbo = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, col_vbo)
GL.glBufferData(GL.GL_ARRAY_BUFFER, colors.itemsize*int(len(colors)), colors, GL.GL_STATIC_DRAW)
att_colors = GL.glGetAttribLocation(program, 'vert_color')
GL.glEnableVertexAttribArray(att_colors)
GL.glVertexAttribPointer(att_colors, 3, GL.GL_FLOAT, GL.GL_FALSE, 3*colors.itemsize, ctypes.c_void_p(0))
dot_vbo = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, dot_vbo)
GL.glBufferData(GL.GL_ARRAY_BUFFER, dot_sizes.itemsize*len(dot_sizes), dot_sizes, GL.GL_STATIC_DRAW)
att_size = GL.glGetAttribLocation(program, 'vert_dot_size')
GL.glEnableVertexAttribArray(att_size)
GL.glVertexAttribPointer(att_size, 1, GL.GL_FLOAT, GL.GL_FALSE, dot_sizes.itemsize, ctypes.c_void_p(0))
bckgrnd_vbo = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, bckgrnd_vbo)
GL.glBufferData(GL.GL_ARRAY_BUFFER, bckgrnd_color.itemsize*len(bckgrnd_color), bckgrnd_color, GL.GL_STATIC_DRAW)
att_bck_color = GL.glGetAttribLocation(program, 'bckgrnd_color')
GL.glEnableVertexAttribArray(att_bck_color)
GL.glVertexAttribPointer(att_bck_color, 4, GL.GL_FLOAT, GL.GL_FALSE, 4*bckgrnd_color.itemsize, ctypes.c_void_p(0))
GL.glBindVertexArray(0)
GL.glDisableVertexAttribArray(att_position)
GL.glDisableVertexAttribArray(att_colors)
GL.glDisableVertexAttribArray(att_size)
GL.glDisableVertexAttribArray(att_bck_color)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, 0)
GL.glBindBuffer(GL.GL_ELEMENT_ARRAY_BUFFER, 0)
vismol_object.sel_dots_vao = vao
vismol_object.sel_dot_buffers = (ind_vbo, coord_vbo, col_vbo)
return True
def initialize(self):
# Load Shader
self.window = Window('009.vs', '009.frag', 'window.png')
# Enable Transparency
GL.glEnable(GL.GL_BLEND);
GL.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA);
# Same Data as EBO w/ Indices for buffers
vertexData = numpy.array([
# Positions # Color # Texture
0.5, 0.5, 0.0, 1.0, 0.0, 0.0, 1.0, 1.0, # Top Right
0.5, -0.5, 0.0, 0.0, 1.0, 0.0, 1.0, 0.0, # Bottom Right
-0.5, -0.5, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, # Bottom Left
-0.5, 0.5, 0.0, 1.0, 1.0, 0.0, 0.0, 1.0, # Top Left
], dtype=numpy.float32)
indexData = numpy.array([
0, 1, 2, # First Triangle
0, 2, 3, # Second Triangle
], dtype=numpy.uint32)
self.index_size = indexData.size
# Core OpenGL requires that at least one OpenGL vertex array be bound
self.VAO = GL.glGenVertexArrays(1)
GL.glBindVertexArray(self.VAO)
# Need VBO for triangle vertices
VBO = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, VBO)
GL.glBufferData(GL.GL_ARRAY_BUFFER, vertexData.nbytes, vertexData, GL.GL_STATIC_DRAW)
# We make an EBO now
EBO = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ELEMENT_ARRAY_BUFFER, EBO)
GL.glBufferData(GL.GL_ELEMENT_ARRAY_BUFFER, indexData.nbytes, indexData, GL.GL_STATIC_DRAW)
# Define Stride
stride = 8 * ctypes.sizeof(_types.GLfloat)
# enable array and set up data - calculating stride length, wow; not documented
GL.glVertexAttribPointer(0, 3, GL.GL_FLOAT, GL.GL_FALSE, stride, None)
GL.glEnableVertexAttribArray(0)
# I like how offsets aren't documented either; http://pyopengl.sourceforge.net/documentation/manual-3.0/glVertexAttribPointer.html
# offsets https://twistedpairdevelopment.wordpress.com/2013/02/16/using-array_buffers-in-pyopengl/
# http://stackoverflow.com/questions/11132716/how-to-specify-buffer-offset-with-pyopengl
GL.glVertexAttribPointer(1, 3, GL.GL_FLOAT, GL.GL_FALSE, stride, ctypes.c_void_p((3 * ctypes.sizeof(_types.GLfloat))))
GL.glEnableVertexAttribArray(1)
GL.glVertexAttribPointer(2, 2, GL.GL_FLOAT, GL.GL_FALSE, stride, ctypes.c_void_p((6 * ctypes.sizeof(_types.GLfloat))))
GL.glEnableVertexAttribArray(2)
# Unbind so we don't mess w/ them
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, 0)
GL.glBindVertexArray(0)
def init_gl(self, force=False):
if self._initialized and not force:
return
self._initialized = False
for material, prims in self.primitives.items():
material.init_gl(force=force)
technique = material.technique
for prim in prims:
prim.init_gl(force=force)
if technique in prim.vaos:
continue
vao = gl.glGenVertexArrays(1)
prim.vaos[technique] = vao
gl.glBindVertexArray(vao)
for attribute_name, location in technique.attribute_locations.items(
):
attribute = prim.attributes[attribute_name]
gl.glEnableVertexAttribArray(location)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER,
prim.buffers[attribute_name])
gl.glVertexAttribPointer(
location, attribute.shape[-1],
DTYPE_COMPONENT_TYPE[attribute.dtype], False,
attribute.dtype.itemsize * attribute.shape[-1],
NULL_PTR)
if attribute_name in technique.attribute_divisors:
gl.glVertexAttribDivisor(
location,
technique.attribute_divisors[attribute_name])
gl.glBindVertexArray(0)
for location in technique.attribute_locations.values():
gl.glDisableVertexAttribArray(location)
err = gl.glGetError()
if err != gl.GL_NO_ERROR:
raise Exception('failed to init primitive: %s' % err)
_logger.info('%s.init_gl: OK' % self.__class__.__name__)
self._initialized = True
def process(self):
gl.glEnable(gl.GL_CULL_FACE)
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
shader: WaterShader = self.world.water_shader
shader.start()
shader.load_view_matrix(self.world.view_matrix)
shader.load_projection_matrix(self.world.projection_matrix)
shader.load_light_setup(self.world.light_setup)
shader.add_delta(self.world.delta)
for _id, (mesh, transformation) in self.world.get_components(
TerrainMesh, TransformationMatrix):
# Bind buffers
gl.glBindVertexArray(mesh.vba_id)
mesh.index_buffer.bind()
gl.glEnableVertexAttribArray(TerrainMesh.TEX_COORDS_ATTR)
gl.glActiveTexture(gl.GL_TEXTURE0)
gl.glBindTexture(
gl.GL_TEXTURE_2D,
mesh.height_maps[self.world.height_map_index].texture)
gl.glUniform1i(shader.u_tex_map, 0)
# Draw the beautiful
shader.load_transformation_matrix(transformation.value)
gl.glDrawElements(gl.GL_TRIANGLES, mesh.vertex_count,
gl.GL_UNSIGNED_INT, None)
# Unbind the thingies
gl.glDisableVertexAttribArray(TerrainMesh.TEX_COORDS_ATTR)
gl.glBindVertexArray(0)
shader.stop()
gl.glDisable(gl.GL_BLEND)
gl.glDisable(gl.GL_CULL_FACE)
def make_circles(program):
""" Function doc """
vertex_array_object = GL.glGenVertexArrays(1)
GL.glBindVertexArray(vertex_array_object)
coords = np.array([
1.0, 1.0, 0.0, 0.0, 1.0, 0.0, 1.0, 0.0, 0.0, -1.0, 0.0, 0.0, -1.0, 1.0,
0.0, -1.0, -1.0, 0.0, 0.0, -1.0, 0.0, 1.0, -1.0, 0.0, 0.0, 0.0, 0.0
],
dtype=np.float32)
colors = np.array([
1.0, 0.0, 0.0, 1.0, 1.0, 0.0, 1.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 1.0,
0.0, 0.0, 1.0, 1.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0
],
dtype=np.float32)
coord_vbo = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, coord_vbo)
GL.glBufferData(GL.GL_ARRAY_BUFFER, coords.itemsize * len(coords), coords,
GL.GL_STATIC_DRAW)
position = GL.glGetAttribLocation(program, 'vert_coord')
GL.glEnableVertexAttribArray(position)
GL.glVertexAttribPointer(position, 3, GL.GL_FLOAT, GL.GL_FALSE,
3 * coords.itemsize, ctypes.c_void_p(0))
col_vbo = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, col_vbo)
GL.glBufferData(GL.GL_ARRAY_BUFFER, colors.itemsize * len(colors), colors,
GL.GL_STATIC_DRAW)
gl_colors = GL.glGetAttribLocation(program, 'vert_color')
GL.glEnableVertexAttribArray(gl_colors)
GL.glVertexAttribPointer(gl_colors, 3, GL.GL_FLOAT, GL.GL_FALSE,
3 * colors.itemsize, ctypes.c_void_p(0))
GL.glBindVertexArray(0)
GL.glDisableVertexAttribArray(position)
GL.glDisableVertexAttribArray(gl_colors)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, 0)
return vertex_array_object, (coord_vbo, col_vbo), int(len(coords))
def draw_planes():
# Enable shader program
gl.glUseProgram(program)
# Set view matrix
view = ut.matLookAt(camPosition[0], camPosition[1], camPosition[2], camTarget[0], camTarget[1], camTarget[2], camUp[0], camUp[1], camUp[2])
loc = gl.glGetUniformLocation(program, "view")
gl.glUniformMatrix4fv(loc, 1, gl.GL_FALSE, view.transpose())
# Set projection matrix
projection = ut.matPerspective(np.radians(fov), win_width/win_height, 0.1, 100.0)
loc = gl.glGetUniformLocation(program, "projection")
gl.glUniformMatrix4fv(loc, 1, gl.GL_FALSE, projection.transpose())
# Set current model matrix (global)
loc = gl.glGetUniformLocation(program, "model")
gl.glUniformMatrix4fv(loc, 1, gl.GL_FALSE, model.transpose())
# Set light attributes
loc = gl.glGetUniformLocation(program, "lightColor")
gl.glUniform3f(loc, lightColor[0], lightColor[1], lightColor[2])
loc = gl.glGetUniformLocation(program, "lightPosition")
gl.glUniform3f(loc, lightPosition[0], lightPosition[1], lightPosition[2])
# Set color attributes for mesh
loc = gl.glGetUniformLocation(program, "objectColor")
gl.glUniform4f(loc, planeColor[0], planeColor[1], planeColor[2], planeColor[3])
# Set current model matrix (global)
S = ut.matScale(1.5,1.5,1.0)
loc = gl.glGetUniformLocation(program, "model")
gl.glUniformMatrix4fv(loc, 1, gl.GL_FALSE, np.matmul(model,S).transpose())
# Draw planes
gl.glBindVertexArray(VAO_planes)
gl.glDrawArrays(gl.GL_TRIANGLES, 0, num_vertices_planes)
gl.glBindVertexArray(0)
def initialise_gl(self):
state = OpenGLContextState()
state.shader_program.addShaderFromSourceCode(QOpenGLShader.Vertex,
VERTEX)
state.shader_program.addShaderFromSourceCode(QOpenGLShader.Fragment,
FRAGMENT)
if not state.shader_program.link():
raise Exception("Could not link shaders - {}".format(
state.shader_program.log()))
state.vertex_attribute_object = GL.glGenVertexArrays(1)
GL.glBindVertexArray(state.vertex_attribute_object)
vertex_buffer_object = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, vertex_buffer_object)
GL.glBufferData(GL.GL_ARRAY_BUFFER, self.vertex_data.nbytes,
self.vertex_data, GL.GL_STATIC_DRAW)
state.invert = state.shader_program.uniformLocation("invert")
state.projection = state.shader_program.uniformLocation("projection")
state.view = state.shader_program.uniformLocation("view")
state.model = state.shader_program.uniformLocation("model")
state.vertex_position = state.shader_program.attributeLocation(
"vertexPosition")
GL.glVertexAttribPointer(state.vertex_position, 3, GL.GL_FLOAT,
GL.GL_FALSE, 0, None)
GL.glEnableVertexAttribArray(0)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, 0)
GL.glBindVertexArray(0)
return state
def update(self):
if not self.loaded:
return None
if not self.renderFlag_b:
return None
for key_s in self.vertices_d:
obj_d = self.vertices_d[key_s]
gl.glBindVertexArray(obj_d["vao"])
gl.glActiveTexture(gl.GL_TEXTURE0)
gl.glBindTexture(gl.GL_TEXTURE_2D, obj_d["txid"])
#### To vertex shader ####
gl.glUniformMatrix4fv(3, 1, gl.GL_FALSE, self.getModelMatrix())
#### To fragment shader ####
gl.glUniform1f(11, self.shininess_f)
gl.glUniform1f(53, self.specularStrength_f)
#### ####
gl.glDrawArrays(gl.GL_TRIANGLES, 0, obj_d["ver_num"])
def render(self, offset, window_dimensions):
font_height = self.img_dimensions[1] / 16
font_width = self.img_dimensions[0] / 16
gl.glBindVertexArray(self.vao)
gl.glViewport(0, 0, window_dimensions[0],
window_dimensions[1])
gl.glUseProgram(self.shader)
gl.glBindTexture(gl.GL_TEXTURE_2D, self.texture_ids['font'])
view_matrix = get_view_matrix(1.0, 1.0)
proj_matrix = get_projection_matrix(0, window_dimensions[0],
0, window_dimensions[1])
gl.glUniformMatrix4fv(self.uniform_locs['view_matrix'],
1, gl.GL_TRUE, view_matrix)
gl.glUniformMatrix4fv(self.uniform_locs['proj_matrix'],
1, gl.GL_TRUE, proj_matrix)
model_matrix = get_4x4_transform(font_width, font_height,
offset[0], offset[1], 1.0)
gl.glUniformMatrix4fv(self.uniform_locs['model_matrix'], 1,
gl.GL_TRUE, model_matrix)
gl.glBindBuffer(gl.GL_ELEMENT_ARRAY_BUFFER,
self.index_buffers['vert_indexes'])
gl.glDrawElements(gl.GL_TRIANGLES, len(self.indexes),
gl.GL_UNSIGNED_INT, ctypes.c_void_p(0))
def process(self):
# Ugly hacks, because hacker man!!
# You should delete this command before you hand in the assignment
# nawww ~xFrednet
shader: StandardShaderProgram = self.world.standard_shader
for _id, (vba, translation, material) in self.world.get_components(
StandardShaderVertexArray,
com.TransformationMatrix,
com.ObjectMaterial):
# Bind buffers
gl.glBindVertexArray(vba.vertex_array_id)
gl.glEnableVertexAttribArray(shader.POSITION_ATTR)
gl.glEnableVertexAttribArray(shader.NORMAL_ATTR)
# Draw the beautiful
shader.set_transformation_matrix(translation.value)
shader.set_object_material(material)
gl.glDrawArrays(gl.GL_TRIANGLES, 0, vba.vertex_count)
# Unbind the thingies
gl.glDisableVertexAttribArray(shader.POSITION_ATTR)
gl.glDisableVertexAttribArray(shader.NORMAL_ATTR)
gl.glBindVertexArray(0)
def initgl(self):
vert = resources.read_text("plots.shaders", "text_vert.glsl")
frag = resources.read_text("plots.shaders", "text_frag.glsl")
vert = shaders.compileShader(vert, gl.GL_VERTEX_SHADER)
frag = shaders.compileShader(frag, gl.GL_FRAGMENT_SHADER)
self.shaderProgram = shaders.compileProgram(vert, frag)
self.vbo = vbo.VBO(np.array([
# x y u v
0, -1, 0, 0,
0, 0, 0, 1,
1, 0, 1, 1,
0, -1, 0, 0,
1, 0, 1, 1,
1, -1, 1, 0
], 'f'), usage="GL_STATIC_DRAW")
self.vao = gl.glGenVertexArrays(1)
gl.glBindVertexArray(self.vao)
self.vbo.bind()
self.vbo.copy_data()
gl.glVertexAttribPointer(0, 4, gl.GL_FLOAT, False, 4*self.vbo.data.itemsize, self.vbo)
gl.glEnableVertexAttribArray(0)
self.vbo.unbind()
gl.glBindVertexArray(0)
def render(self):
if self.crt and not self.disable_crt:
GL.glUseProgram(self.crt_shader.program)
GL.glUniform1i(self.crt_tex_uniform, 0)
GL.glUniform2f(self.crt_res_uniform, self.width, self.height)
GL.glUniform1f(self.crt_time_uniform, self.app.get_elapsed_time())
else:
GL.glUseProgram(self.plain_shader.program)
GL.glUniform1i(self.plain_tex_uniform, 0)
GL.glBindTexture(GL.GL_TEXTURE_2D, self.texture)
GL.glClearColor(*self.clear_color)
GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
# VAO vs non-VAO paths
if self.app.use_vao:
GL.glBindVertexArray(self.vao)
else:
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, self.vbo)
GL.glVertexAttribPointer(self.plain_attrib, 2, GL.GL_FLOAT,
GL.GL_FALSE, 0, None)
GL.glEnableVertexAttribArray(self.plain_attrib)
GL.glDrawArrays(GL.GL_TRIANGLE_STRIP, 0, 4)
if self.app.use_vao:
GL.glBindVertexArray(0)
GL.glUseProgram(0)
def draw(self, projection, view, model, color_shader):
GL.glUseProgram(color_shader.glid)
matrix_location = GL.glGetUniformLocation(color_shader.glid, 'matrix')
# matrix = frustum(-20, 20, -20, 20, -20, 20)
# print(matrix)
matrix = perspective(45, 480 / 640, -20, 100)
# print(matrix)
# matrix_S = scale(0.5)
# matrix[0][0] = matrix_S[0][0]
# matrix[1][1] = matrix_S[1][1]
# matrix[2][1] = matrix_S[2][2]
# matrix[3][3] = matrix_S[3][3]
# matrix = matrix @ matrix_S
matrix = matrix @ projection #rotate(vec(0, 0, 1), 45)
GL.glUniformMatrix4fv(matrix_location, 1, True, matrix)
# draw triangle as GL_TRIANGLE vertex array, draw array call
GL.glBindVertexArray(self.glid)
GL.glDrawArrays(GL.GL_TRIANGLES, 0, 3)
GL.glBindVertexArray(0)
def __createBuffer(self):
self.__VAO = gl.glGenVertexArrays(1)
self.__positionVBO = gl.glGenBuffers(1)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self.__positionVBO)
gl.glBufferData(gl.GL_ARRAY_BUFFER, self.__vertexPosition.nbytes,
self.__vertexPosition, gl.GL_STATIC_DRAW)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, 0)
if (len(self.__vertexIndices) > 0):
gl.glBindVertexArray(self.__VAO)
self.__EBO = gl.glGenBuffers(1)
gl.glBindBuffer(gl.GL_ELEMENT_ARRAY_BUFFER, self.__EBO)
gl.glBufferData(gl.GL_ELEMENT_ARRAY_BUFFER,
self.__vertexIndices.nbytes, self.__vertexIndices,
gl.GL_STATIC_DRAW)
gl.glBindVertexArray(0)
if (len(self.__vertexColor) > 0):
self.__colorVBO = gl.glGenBuffers(1)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self.__colorVBO)
gl.glBufferData(gl.GL_ARRAY_BUFFER, self.__vertexColor.nbytes,
self.__vertexColor, gl.GL_STATIC_DRAW)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, 0)
def initialize(self):
vertices = np.array([-0.5, -0.5, 0.0, 0.5, -0.5, 0.0, 0.0, 0.5, 0.0],
dtype=np.float32)
self._vao = GL.glGenVertexArrays(1)
GL.glBindVertexArray(self._vao)
vbo = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, vbo)
GL.glBufferData(GL.GL_ARRAY_BUFFER, vertices, GL.GL_STATIC_DRAW)
GL.glVertexAttribPointer(0, 3, GL.GL_FLOAT, GL.GL_FALSE,
3 * ctypes.sizeof(ctypes.c_float), None)
GL.glEnableVertexAttribArray(0)
GL.glBindVertexArray(0)
vertex_shader = Shader(GL.GL_VERTEX_SHADER,
"shaders_src/hello_triangle_vertex.glsl")
fragment_shader = Shader(GL.GL_FRAGMENT_SHADER,
"shaders_src/hello_triangle_frag.glsl")
self._shader_program = ShaderProgram(vertex_shader, fragment_shader)
vertex_shader.delete()
fragment_shader.delete()
def drawTexture(self, texture, opacity):
""" Draw `texture` on the screen.
Args:
texture (:class:Texture): texture instance
opacity (float): opacity (alpha) of the texture
0 --> transparent
1 --> opaque
"""
self.screenProgram.bind()
gl.glBindVertexArray(self._vaoQuad)
gl.glBindBuffer(gl.GL_ELEMENT_ARRAY_BUFFER, self.IBO)
texture.bind(2)
self.screenProgram.setUniforms((
('u_screen', 2),
('u_opacity', opacity),
))
gl.glDrawElements(gl.GL_TRIANGLES, 6, gl.GL_UNSIGNED_INT,
ctypes.c_void_p(0))
self.screenProgram.unbind()
gl.glBindBuffer(gl.GL_ELEMENT_ARRAY_BUFFER, 0)
gl.glBindVertexArray(0)
texture.unbind()
def set_up_scene(self):
self.vertex_data = []
v = self.scene_volume_init
s = self.scale_spacing
scale = 0.3
mat_scale = numpy.diag(
numpy.array([scale, scale, scale, 1], dtype=numpy.float32))
t = -0.5 * v * s
mat_translate = translate(t, t, t)
mat = mat_translate @ mat_scale
for z in range(v):
for y in range(v):
for x in range(v):
self.add_cube_to_scene(mat)
mat = translate(s, 0, 0) @ mat
mat = translate(-v * s, s, 0) @ mat
mat = translate(0, -v * s, s) @ mat
vertex_data = numpy.array(self.vertex_data,
dtype=numpy.float32).flatten()
self.vert_count = len(vertex_data) / 5
self.scene_vao = GL.glGenVertexArrays(1)
GL.glBindVertexArray(self.scene_vao)
self.scene_vert_buffer = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, self.scene_vert_buffer)
GL.glBufferData(GL.GL_ARRAY_BUFFER, vertex_data, GL.GL_STATIC_DRAW)
f_size = sizeof(c_float)
stride = 5 * f_size
GL.glEnableVertexAttribArray(0)
GL.glVertexAttribPointer(0, 3, GL.GL_FLOAT, False, stride,
cast(0 * f_size, c_void_p))
GL.glEnableVertexAttribArray(1)
GL.glVertexAttribPointer(1, 2, GL.GL_FLOAT, False, stride,
cast(3 * f_size, c_void_p))
GL.glBindVertexArray(0)
GL.glDisableVertexAttribArray(0)
GL.glDisableVertexAttribArray(1)
def initialize(self):
vertices_a = np.array([
-0.6, -0.5, 0.0,
0.4, -0.5, 0.0,
-0.1, 0.5, 0.0], dtype=np.float32)
vertices_b = np.array([
0.1, 0.5, 0.0,
0.6, -0.5, 0.0,
1.0, 0.5, 0.0
], dtype=np.float32)
self._vao_a = GL.glGenVertexArrays(1)
GL.glBindVertexArray(self._vao_a)
vbo = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, vbo)
GL.glBufferData(GL.GL_ARRAY_BUFFER, vertices_a, GL.GL_STATIC_DRAW)
GL.glVertexAttribPointer(0, 3, GL.GL_FLOAT, GL.GL_FALSE, 3 * ctypes.sizeof(ctypes.c_float), None)
GL.glEnableVertexAttribArray(0)
GL.glBindVertexArray(0)
self._vao_b = GL.glGenVertexArrays(1)
GL.glBindVertexArray(self._vao_b)
vbo = GL.glGenBuffers(1)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, vbo)
GL.glBufferData(GL.GL_ARRAY_BUFFER, vertices_b, GL.GL_STATIC_DRAW)
GL.glVertexAttribPointer(0, 3, GL.GL_FLOAT, GL.GL_FALSE, 3 * ctypes.sizeof(ctypes.c_float), None)
GL.glEnableVertexAttribArray(0)
GL.glBindVertexArray(0)
vertex_shader = Shader(GL.GL_VERTEX_SHADER, "shaders_src/hello_triangle_vertex.glsl")
fragment_shader_orange = Shader(GL.GL_FRAGMENT_SHADER, "shaders_src/hello_triangle_ex3_frag.glsl.template", color="1.0, 0.6, 0.2, 1.0")
fragment_shader_pink = Shader(GL.GL_FRAGMENT_SHADER, "shaders_src/hello_triangle_ex3_frag.glsl.template", color="1.0, 0.75, 0.8, 1.0")
self._shader_program_orange = ShaderProgram(vertex_shader, fragment_shader_orange)
self._shader_program_pink = ShaderProgram(vertex_shader, fragment_shader_pink)
vertex_shader.delete()
fragment_shader_orange.delete()
fragment_shader_pink.delete()
def __init__(self, shader):
self.shader = shader
self.color = (1, 0, 1)
# triangle position buffer
position = np.array(((0, 0.5, 0), (0.5, -.5, 0), (-.5, -.5, 0)), 'f')
color = np.array(((1, 0, 0), (0, 1, 0), (0, 0, 1)), 'f')
self.glid = GL.glGenVertexArrays(1) # create OpenGL vertex array id
GL.glBindVertexArray(self.glid) # activate to receive state below
# self.buffers = [GL.glGenBuffers(1)] # create buffer for position attrib
# GL.glGenBuffers(n) with n > 1 directly returns a list and not an index
self.buffers = GL.glGenBuffers(2) # if n > 1, use this instead
# bind the vbo, upload position data to GPU, declare its size and type
GL.glEnableVertexAttribArray(0) # assign to layout = 0 attribute
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, self.buffers[0])
GL.glBufferData(GL.GL_ARRAY_BUFFER, position, GL.GL_STATIC_DRAW)
GL.glVertexAttribPointer(0, 3, GL.GL_FLOAT, False, 0, None)
GL.glEnableVertexAttribArray(1) # assign to layout = 0 attribute
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, self.buffers[1])
GL.glBufferData(GL.GL_ARRAY_BUFFER, color, GL.GL_STATIC_DRAW)
GL.glVertexAttribPointer(1, 3, GL.GL_FLOAT, False, 0, None)
def draw_segments():
# Enable shader program for segments
gl.glUseProgram(program2)
# Set view matrix
view = ut.matLookAt(camPosition[0], camPosition[1], camPosition[2], camTarget[0], camTarget[1], camTarget[2], camUp[0], camUp[1], camUp[2])
loc = gl.glGetUniformLocation(program2, "view")
gl.glUniformMatrix4fv(loc, 1, gl.GL_FALSE, view.transpose())
# Set projection matrix
projection = ut.matPerspective(np.radians(fov), win_width/win_height, 0.1, 100.0)
loc = gl.glGetUniformLocation(program2, "projection")
gl.glUniformMatrix4fv(loc, 1, gl.GL_FALSE, projection.transpose())
# Set current model matrix (global)
loc = gl.glGetUniformLocation(program2, "model")
gl.glUniformMatrix4fv(loc, 1, gl.GL_FALSE, model.transpose())
# Draw segments
gl.glLineWidth(1.5)
gl.glBindVertexArray(VAO_segments)
gl.glDrawArrays(gl.GL_LINES, 0, num_vertices_segments)
gl.glBindVertexArray(0)
gl.glLineWidth(1.0)
def main():
glfw.init()
glfw.window_hint(glfw.CONTEXT_VERSION_MAJOR, 3)
glfw.window_hint(glfw.CONTEXT_VERSION_MINOR, 3)
glfw.window_hint(glfw.OPENGL_PROFILE, glfw.OPENGL_CORE_PROFILE)
window = glfw.create_window(WIN_WIDTH, WIN_HEIGHT, "learning openGL", None,
None)
if window == 0:
print("failed to create window")
glfw.terminate()
glfw.make_context_current(window)
glfw.set_framebuffer_size_callback(window, framebuffer_size_callback)
vertexShader = gl.glCreateShader(gl.GL_VERTEX_SHADER)
gl.glShaderSource(vertexShader, vertexShaderSource)
gl.glCompileShader(vertexShader)
fragmentShader = gl.glCreateShader(gl.GL_FRAGMENT_SHADER)
gl.glShaderSource(fragmentShader, fragmentShaderSource)
gl.glCompileShader(fragmentShader)
shaderProgram = gl.glCreateProgram()
gl.glAttachShader(shaderProgram, vertexShader)
gl.glAttachShader(shaderProgram, fragmentShader)
gl.glLinkProgram(shaderProgram)
gl.glDeleteShader(vertexShader)
gl.glDeleteShader(fragmentShader)
VAO = gl.glGenVertexArrays(1)
VBO, EBO = gl.glGenBuffers(2)
gl.glBindVertexArray(VAO)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, VBO)
gl.glBufferData(gl.GL_ARRAY_BUFFER, sys.getsizeof(vertices), vertices,
gl.GL_STATIC_DRAW)
gl.glVertexAttribPointer(0, 3, gl.GL_FLOAT, gl.GL_FALSE, 24, c_void_p(0))
gl.glEnableVertexAttribArray(0)
gl.glVertexAttribPointer(1, 3, gl.GL_FLOAT, gl.GL_FALSE, 24, c_void_p(12))
gl.glEnableVertexAttribArray(1)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, 0)
gl.glBindVertexArray(0)
while not glfw.window_should_close(window):
process_input(window)
gl.glClearColor(0.2, 0.3, 0.3, 1.0)
gl.glClear(gl.GL_COLOR_BUFFER_BIT)
gl.glUseProgram(shaderProgram)
gl.glBindVertexArray(VAO)
gl.glDrawArrays(gl.GL_TRIANGLES, 0, 3)
glfw.swap_buffers(window)
glfw.poll_events()
glfw.terminate()
def __render_lines(self):
GL.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_LINE)
GL.glBindVertexArray(self.__vao_pointer)
self.__line_data.bind()
self.__handle_vertex_attrib()
GL.glUseProgram(self.__shader_program)
GL.glBindVertexArray(self.__vao_pointer)
GL.glDrawArrays(GL.GL_LINES, 0, len(self.__line_data.data))
GL.glBindVertexArray(0)
def __render_voxels(self):
GL.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_FILL)
GL.glBindVertexArray(self.__vao_pointer)
self.__voxel_indicies_data.bind()
self.__voxel_data.bind()
self.__handle_vertex_attrib()
GL.glUseProgram(self.__shader_program)
GL.glBindVertexArray(self.__vao_pointer)
GL.glDrawElements(GL.GL_TRIANGLES, len(self.__voxel_data.data), GL.GL_UNSIGNED_INT, None)
GL.glBindVertexArray(0)
def display(shader, vertex_array_object):
global transform
GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
GL.glUseProgram(shader[0])
transLoc = GL.glGetUniformLocation(shader[0], "transform")
GL.glUniform1f(transLoc, transform)
transform += 0.0001
GL.glBindVertexArray(vertex_array_object[0])
GL.glDrawArrays(GL.GL_TRIANGLES, 0, 3)
GL.glBindVertexArray(0)
GL.glUseProgram(0)
GL.glUseProgram(shader[1])
GL.glBindVertexArray(vertex_array_object[1])
GL.glDrawArrays(GL.GL_TRIANGLES, 0, 3)
GL.glBindVertexArray(0)
GL.glUseProgram(0)
def draw():
gl.glClearColor(0.2, 0.3, 0.3, 1.0)
gl.glClear(gl.GL_COLOR_BUFFER_BIT)
gl.glUseProgram(shaderProgram)
gl.glBindVertexArray(VAO)
gl.glDrawElements(gl.GL_TRIANGLES, 3 * indices.shape[0],
gl.GL_UNSIGNED_INT, None)
gl.glBindVertexArray(VAO2)
gl.glDrawElements(gl.GL_TRIANGLES, 3 * indices2.shape[0],
gl.GL_UNSIGNED_INT, None)
gl.glBindVertexArray(0)
glfw.swap_buffers(window)
def display(self):
GL.glClearColor(0, 0, 0, 0)
GL.glClear(GL.GL_COLOR_BUFFER_BIT)
GL.glUseProgram(self.shader)
GL.glBindVertexArray(self.vao1)
GL.glUniform3f(self.offset_location, 0.0, 0.0, 0.0)
GL.glDrawElements(GL.GL_TRIANGLES, len(self.indices),
GL.GL_UNSIGNED_SHORT, None)
GL.glBindVertexArray(self.vao2)
GL.glUniform3f(self.offset_location, 0.0, 0.0, -1.0)
GL.glDrawElements(GL.GL_TRIANGLES, len(self.indices),
GL.GL_UNSIGNED_SHORT, None)
GL.glBindVertexArray(0)
GL.glUseProgram(0)
def unbind_vao(self):
GL.glBindVertexArray(0)
def bind_vao(self):
if self.vaoID is None:
self.vaoID = GL.glGenVertexArrays(1)
GL.glBindVertexArray(self.vaoID)
def __init__(self):
# set up the shader
i_vert = gl.glCreateShader(gl.GL_VERTEX_SHADER)
gl.glShaderSource(i_vert, vert_shader)
i_frag = gl.glCreateShader(gl.GL_FRAGMENT_SHADER)
gl.glShaderSource(i_frag, frag_shader)
self.program = gl.glCreateProgram()
gl.glAttachShader(self.program, i_vert)
gl.glAttachShader(self.program, i_frag)
gl.glCompileShader(i_vert)
gl.glCompileShader(i_frag)
gl.glLinkProgram(self.program)
gl.glValidateProgram(self.program)
gl.glUseProgram(self.program)
# set up the geometry
i_pos = gl.glGetAttribLocation(self.program, "pos")
i_normal = gl.glGetAttribLocation(self.program, "normal")
self.i_vao = gl.glGenVertexArrays(1)
i_vbo = gl.glGenBuffers(1)
gl.glBindVertexArray(self.i_vao)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, i_vbo)
gl.glBufferData(
gl.GL_ARRAY_BUFFER, # target
vertex_data.nbytes, # size
vertex_data, # data
gl.GL_STATIC_DRAW, # usage
)
gl.glEnableVertexAttribArray(i_pos)
gl.glVertexAttribPointer(
i_pos, # index
3, # size
gl.GL_FLOAT, # type
gl.GL_FALSE, # normalisation
0, # stride
ctypes.c_void_p(0), # pointer
)
gl.glEnableVertexAttribArray(i_normal)
gl.glVertexAttribPointer(
i_normal, # index
3, # size
gl.GL_FLOAT, # type
gl.GL_FALSE, # normalisation
0, # stride
ctypes.c_void_p(len(points) * 4), # pointer
)
self.i_proj = gl.glGetUniformLocation(self.program, "projection")
self.i_view = gl.glGetUniformLocation(self.program, "view")
self.i_model = gl.glGetUniformLocation(self.program, "model")
self.i_colour = gl.glGetUniformLocation(self.program, "colour")
self.i_lightsource_dir = gl.glGetUniformLocation(
self.program, "lightsource_dir"
)
self.i_ambient = gl.glGetUniformLocation(self.program, "ambient")
# set the rotation matrix to null
self.set_model(model=np.eye(4).T)
gl.glUseProgram(0)
def initializeGL(self):
openGL_format = self.format()
self.is_core = openGL_format.profile() == QtGui.QSurfaceFormat.CoreProfile
self.logOpenGLFormat(openGL_format)
self.clearErrors()
legacy_vertex_shader_source = """
#version 110
// input
attribute vec3 in_color;
uniform mat4 mvp;
// output
varying vec3 out_color;
void main()
{
gl_Position = mvp * gl_Vertex;
out_color = in_color;
}"""
core_vertex_shader_source = """
#version 150 core
// input
in vec3 in_position;
in vec3 in_color;
uniform mat4 mvp;
// output
out vec3 out_color;
void main()
{
gl_Position = mvp * vec4(in_position, 1.0);
out_color = in_color;
}"""
vertex_shader_source = core_vertex_shader_source if self.is_core else legacy_vertex_shader_source
quad_vertex_shader = shaders.compileShader(vertex_shader_source, GL.GL_VERTEX_SHADER)
legacy_fragment_shader_source = """
#version 110
// input
varying vec3 out_color;
void main()
{
gl_FragColor = vec4(out_color, 1.0);
}"""
core_fragment_shader_source = """
#version 150 core
// input
in vec3 out_color;
// output
out vec4 frag_color;
void main()
{
frag_color = vec4(out_color, 1.0);
}"""
fragment_shader_source = core_fragment_shader_source if self.is_core else legacy_fragment_shader_source
quad_fragment_shader = shaders.compileShader(fragment_shader_source, GL.GL_FRAGMENT_SHADER)
if self.is_core:
# on OpenGL 3 core, create a vertex array object (on non-core, there is one default VAO)
self.vao = GL.glGenVertexArrays(1)
# VAO needs to be bound before the program can be compiled
GL.glBindVertexArray(self.vao)
self.quad_shader = shaders.compileProgram(quad_vertex_shader, quad_fragment_shader)
vertices = np.array(
[[ 0, 100, 0 ],
[ 100, 100, 0],
[ 100, 0, 0 ],
[200, 200, 0],
[200, 400, 0],
[400, 400, 0],
[400, 400, 0],
[200, 200, 0],
[400, 200, 0]], 'f')
self.background_vbo = vbo.VBO(vertices)
self.border_vbo = vbo.VBO(vertices)
self.ruler_vbo = vbo.VBO(vertices)
self.grid_vbo = vbo.VBO(vertices)
self.data_vbo = vbo.VBO(vertices)
def unbind_all():
gl.glBindVertexArray(0)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, 0)
VertexAttributeObject.bound_vao = -1
def bind(self):
if VertexAttributeObject.bound_vao != self.vao_id:
gl.glBindVertexArray(self.vao_id)
VertexAttributeObject.bound_vao = self.vao_id
for attrib in self.enabled_attributes:
attrib.enable()
def render():
global sampleTexture
global shaderProgram
global texUnitUniform
global VAO
GL.glClearColor(0, 0, 0, 1)
GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
# active shader program
GL.glUseProgram(shaderProgram)
try:
# Activate texture
GL.glActiveTexture(GL.GL_TEXTURE0)
GL.glBindTexture(GL.GL_TEXTURE_2D, sampleTexture)
GL.glUniform1i(texUnitUniform, 0)
# Activate array
GL.glBindVertexArray(VAO)
# draw triangle
GL.glDrawArrays(GL.GL_TRIANGLES, 0, 3)
finally:
GL.glBindVertexArray(0)
GL.glUseProgram(0)