def __init__(self, width, height, eyeshift, *args, **kwargs):
"""
Initiate the projection by recording the width and height of
the opened window
"""
self.width = width
self.height = height
self.eyeshiftset = [[eyeshift[0].real, eyeshift[0].imag, VIEW_DIST],
[eyeshift[1].real, eyeshift[1].imag, VIEW_DIST]]
self.frust = [
-0.5 * SCREEN_WIDTH, 0.5 * SCREEN_WIDTH, -0.5 * SCREEN_HEIGHT,
0.5 * SCREEN_HEIGHT, -200, 40
]
glViewport(0, 0, self.width, self.height)
glDepthRange(0, 10)
def __init__(self, width, height, eyeshift, *args, **kwargs):
"""
Initiate the projection by recording the width and height of
the opened window
"""
self.width = width
self.height = height
self.eyeshiftset = [
[eyeshift[0].real, eyeshift[0].imag, VIEW_DIST],
[eyeshift[1].real, eyeshift[1].imag, VIEW_DIST]
]
self.frust = [
-0.5 * SCREEN_WIDTH, 0.5 * SCREEN_WIDTH,
-0.5 * SCREEN_HEIGHT, 0.5 * SCREEN_HEIGHT,
-200, 40
]
glViewport(0, 0, self.width, self.height)
glDepthRange(0, 10)
def setDepthRange_Highlighting(self):
glDepthRange(0.0, 1.0 - DEPTH_TWEAK)
return
def setDepthRange_Normal(self):
glDepthRange(0.0 + DEPTH_TWEAK, 1.0) # args are near, far
return
def setDepthRange_Highlighting(self):
glDepthRange(0.0, 1.0 - self.DEPTH_TWEAK)
return
def setDepthRange_Normal(self):
glDepthRange(0.0 + self.DEPTH_TWEAK, 1.0) # args are near, far
return
def run():
#Start OpenGL and ask it for an OpenGL context
pygame.init()
clock = pygame.time.Clock()
screen = pygame.display.set_mode(SCREEN_SIZE, pygame.HWSURFACE|pygame.OPENGL|pygame.DOUBLEBUF)
#The first thing we do is print some OpenGL details and check that we have a good enough version
print("OpenGL Implementation Details:")
if glGetString(GL_VENDOR):
print("\tGL_VENDOR: {}".format(glGetString(GL_VENDOR).decode()))
if glGetString(GL_RENDERER):
print("\tGL_RENDERER: {}".format(glGetString(GL_RENDERER).decode()))
if glGetString(GL_VERSION):
print("\tGL_VERSION: {}".format(glGetString(GL_VERSION).decode()))
if glGetString(GL_SHADING_LANGUAGE_VERSION):
print("\tGL_SHADING_LANGUAGE_VERSION: {}".format(glGetString(GL_SHADING_LANGUAGE_VERSION).decode()))
major_version = int(glGetString(GL_VERSION).decode().split()[0].split('.')[0])
minor_version = int(glGetString(GL_VERSION).decode().split()[0].split('.')[1])
if major_version < 3 or (major_version < 3 and minor_version < 0):
print("OpenGL version must be at least 3.0 (found {0})".format(glGetString(GL_VERSION).decode().split()[0]))
#Now onto the OpenGL initialisation
#Set up depth culling
glEnable(GL_CULL_FACE)
glEnable(GL_DEPTH_TEST)
glDepthMask(GL_TRUE)
glDepthFunc(GL_LEQUAL)
glDepthRange(0.0, 1.0)
#We create out shaders which do little more than set a flat colour for each face
VERTEX_SHADER = shaders.compileShader(b"""
#version 130
in vec4 position;
in vec4 normal;
uniform mat4 projectionMatrix;
uniform mat4 viewMatrix;
uniform mat4 modelMatrix;
flat out float theColor;
void main()
{
vec4 temp = modelMatrix * position;
temp = viewMatrix * temp;
gl_Position = projectionMatrix * temp;
theColor = clamp(abs(dot(normalize(normal.xyz), normalize(vec3(0.9,0.1,0.5)))), 0, 1);
}
""", GL_VERTEX_SHADER)
FRAGMENT_SHADER = shaders.compileShader(b"""
#version 130
flat in float theColor;
out vec4 outputColor;
void main()
{
outputColor = vec4(1.0, 0.5, theColor, 1.0);
}
""", GL_FRAGMENT_SHADER)
shader = shaders.compileProgram(VERTEX_SHADER, FRAGMENT_SHADER)
#And then grab our attribute locations from it
glBindAttribLocation(shader, 0, b"position")
glBindAttribLocation(shader, 1, b"normal")
#Create the Vertex Array Object to hold our volume mesh
vertexArrayObject = GLuint(0)
glGenVertexArrays(1, vertexArrayObject)
glBindVertexArray(vertexArrayObject)
#Create the index buffer object
indexPositions = vbo.VBO(indices, target=GL_ELEMENT_ARRAY_BUFFER, usage=GL_STATIC_DRAW)
#Create the VBO
vertexPositions = vbo.VBO(vertices, usage=GL_STATIC_DRAW)
#Bind our VBOs and set up our data layout specifications
with indexPositions, vertexPositions:
glEnableVertexAttribArray(0)
glVertexAttribPointer(0, 3, GL_FLOAT, False, 6*vertices.dtype.itemsize, vertexPositions+(0*vertices.dtype.itemsize))
glEnableVertexAttribArray(1)
glVertexAttribPointer(1, 3, GL_FLOAT, False, 6*vertices.dtype.itemsize, vertexPositions+(3*vertices.dtype.itemsize))
glBindVertexArray(0)
glDisableVertexAttribArray(0)
#Now grab out transformation martix locations
modelMatrixUnif = glGetUniformLocation(shader, b"modelMatrix")
viewMatrixUnif = glGetUniformLocation(shader, b"viewMatrix")
projectionMatrixUnif = glGetUniformLocation(shader, b"projectionMatrix")
modelMatrix = np.array([[1.0,0.0,0.0,-32.0],[0.0,1.0,0.0,-32.0],[0.0,0.0,1.0,-32.0],[0.0,0.0,0.0,1.0]], dtype='f')
viewMatrix = np.array([[1.0,0.0,0.0,0.0],[0.0,1.0,0.0,0.0],[0.0,0.0,1.0,-50.0],[0.0,0.0,0.0,1.0]], dtype='f')
projectionMatrix = np.array([[0.0,0.0,0.0,0.0],[0.0,0.0,0.0,0.0],[0.0,0.0,0.0,0.0],[0.0,0.0,0.0,0.0]], dtype='f')
#These next few lines just set up our camera frustum
fovDeg = 45.0
frustumScale = 1.0 / tan(radians(fovDeg) / 2.0)
zNear = 1.0
zFar = 1000.0
projectionMatrix[0][0] = frustumScale
projectionMatrix[1][1] = frustumScale
projectionMatrix[2][2] = (zFar + zNear) / (zNear - zFar)
projectionMatrix[2][3] = -1.0
projectionMatrix[3][2] = (2 * zFar * zNear) / (zNear - zFar)
#viewMatrix and projectionMatrix don't change ever so just set them once here
with shader:
glUniformMatrix4fv(projectionMatrixUnif, 1, GL_TRUE, projectionMatrix)
glUniformMatrix4fv(viewMatrixUnif, 1, GL_TRUE, viewMatrix)
#These are used to track the rotation of the volume
LastFrameMousePos = (0,0)
CurrentMousePos = (0,0)
xRotation = 0
yRotation = 0
while True:
clock.tick()
for event in pygame.event.get():
if event.type == pygame.QUIT:
return
if event.type == pygame.KEYUP and event.key == pygame.K_ESCAPE:
return
if event.type == pygame.MOUSEBUTTONDOWN and event.button == 1:
CurrentMousePos = event.pos
LastFrameMousePos = CurrentMousePos
if event.type == pygame.MOUSEMOTION and 1 in event.buttons:
CurrentMousePos = event.pos
diff = (CurrentMousePos[0] - LastFrameMousePos[0], CurrentMousePos[1] - LastFrameMousePos[1])
xRotation += event.rel[0]
yRotation += event.rel[1]
LastFrameMousePos = CurrentMousePos
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
#Perform the rotation of the mesh
moveToOrigin = np.array([[1.0,0.0,0.0,-32.0],[0.0,1.0,0.0,-32.0],[0.0,0.0,1.0,-32.0],[0.0,0.0,0.0,1.0]], dtype='f')
rotateAroundX = np.array([[1.0,0.0,0.0,0.0],[0.0,cos(radians(yRotation)),-sin(radians(yRotation)),0.0],[0.0,sin(radians(yRotation)),cos(radians(yRotation)),0.0],[0.0,0.0,0.0,1.0]], dtype='f')
rotateAroundY = np.array([[cos(radians(xRotation)),0.0,sin(radians(xRotation)),0.0],[0.0,1.0,0.0,0.0],[-sin(radians(xRotation)),0.0,cos(radians(xRotation)),0.0],[0.0,0.0,0.0,1.0]], dtype='f')
modelMatrix = rotateAroundY.dot(rotateAroundX.dot(moveToOrigin))
with shader:
glUniformMatrix4fv(modelMatrixUnif, 1, GL_TRUE, modelMatrix)
glBindVertexArray(vertexArrayObject)
glDrawElements(GL_TRIANGLES, len(indices), GL_UNSIGNED_INT, None)
glBindVertexArray(0)
# Show the screen
pygame.display.flip()
def run():
#Start OpenGL and ask it for an OpenGL context
pygame.init()
clock = pygame.time.Clock()
screen = pygame.display.set_mode(
SCREEN_SIZE, pygame.HWSURFACE | pygame.OPENGL | pygame.DOUBLEBUF)
#The first thing we do is print some OpenGL details and check that we have a good enough version
print("OpenGL Implementation Details:")
if glGetString(GL_VENDOR):
print("\tGL_VENDOR: {}".format(glGetString(GL_VENDOR).decode()))
if glGetString(GL_RENDERER):
print("\tGL_RENDERER: {}".format(glGetString(GL_RENDERER).decode()))
if glGetString(GL_VERSION):
print("\tGL_VERSION: {}".format(glGetString(GL_VERSION).decode()))
if glGetString(GL_SHADING_LANGUAGE_VERSION):
print("\tGL_SHADING_LANGUAGE_VERSION: {}".format(
glGetString(GL_SHADING_LANGUAGE_VERSION).decode()))
major_version = int(
glGetString(GL_VERSION).decode().split()[0].split('.')[0])
minor_version = int(
glGetString(GL_VERSION).decode().split()[0].split('.')[1])
if major_version < 3 or (major_version < 3 and minor_version < 0):
print("OpenGL version must be at least 3.0 (found {0})".format(
glGetString(GL_VERSION).decode().split()[0]))
#Now onto the OpenGL initialisation
#Set up depth culling
glEnable(GL_CULL_FACE)
glEnable(GL_DEPTH_TEST)
glDepthMask(GL_TRUE)
glDepthFunc(GL_LEQUAL)
glDepthRange(0.0, 1.0)
#We create out shaders which do little more than set a flat colour for each face
VERTEX_SHADER = shaders.compileShader(
b"""
#version 130
in vec4 position;
in vec4 normal;
uniform mat4 projectionMatrix;
uniform mat4 viewMatrix;
uniform mat4 modelMatrix;
flat out float theColor;
void main()
{
vec4 temp = modelMatrix * position;
temp = viewMatrix * temp;
gl_Position = projectionMatrix * temp;
theColor = clamp(abs(dot(normalize(normal.xyz), normalize(vec3(0.9,0.1,0.5)))), 0, 1);
}
""", GL_VERTEX_SHADER)
FRAGMENT_SHADER = shaders.compileShader(
b"""
#version 130
flat in float theColor;
out vec4 outputColor;
void main()
{
outputColor = vec4(1.0, 0.5, theColor, 1.0);
}
""", GL_FRAGMENT_SHADER)
shader = shaders.compileProgram(VERTEX_SHADER, FRAGMENT_SHADER)
#And then grab our attribute locations from it
glBindAttribLocation(shader, 0, b"position")
glBindAttribLocation(shader, 1, b"normal")
#Create the Vertex Array Object to hold our volume mesh
vertexArrayObject = GLuint(0)
glGenVertexArrays(1, vertexArrayObject)
glBindVertexArray(vertexArrayObject)
#Create the index buffer object
indexPositions = vbo.VBO(indices,
target=GL_ELEMENT_ARRAY_BUFFER,
usage=GL_STATIC_DRAW)
#Create the VBO
vertexPositions = vbo.VBO(vertices, usage=GL_STATIC_DRAW)
#Bind our VBOs and set up our data layout specifications
with indexPositions, vertexPositions:
glEnableVertexAttribArray(0)
glVertexAttribPointer(0, 3, GL_FLOAT, False,
6 * vertices.dtype.itemsize,
vertexPositions + (0 * vertices.dtype.itemsize))
glEnableVertexAttribArray(1)
glVertexAttribPointer(1, 3, GL_FLOAT, False,
6 * vertices.dtype.itemsize,
vertexPositions + (3 * vertices.dtype.itemsize))
glBindVertexArray(0)
glDisableVertexAttribArray(0)
#Now grab out transformation martix locations
modelMatrixUnif = glGetUniformLocation(shader, b"modelMatrix")
viewMatrixUnif = glGetUniformLocation(shader, b"viewMatrix")
projectionMatrixUnif = glGetUniformLocation(shader, b"projectionMatrix")
modelMatrix = np.array([[1.0, 0.0, 0.0, -32.0], [0.0, 1.0, 0.0, -32.0],
[0.0, 0.0, 1.0, -32.0], [0.0, 0.0, 0.0, 1.0]],
dtype='f')
viewMatrix = np.array([[1.0, 0.0, 0.0, 0.0], [0.0, 1.0, 0.0, 0.0],
[0.0, 0.0, 1.0, -50.0], [0.0, 0.0, 0.0, 1.0]],
dtype='f')
projectionMatrix = np.array([[0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0],
[0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0]],
dtype='f')
#These next few lines just set up our camera frustum
fovDeg = 45.0
frustumScale = 1.0 / tan(radians(fovDeg) / 2.0)
zNear = 1.0
zFar = 1000.0
projectionMatrix[0][0] = frustumScale
projectionMatrix[1][1] = frustumScale
projectionMatrix[2][2] = (zFar + zNear) / (zNear - zFar)
projectionMatrix[2][3] = -1.0
projectionMatrix[3][2] = (2 * zFar * zNear) / (zNear - zFar)
#viewMatrix and projectionMatrix don't change ever so just set them once here
with shader:
glUniformMatrix4fv(projectionMatrixUnif, 1, GL_TRUE, projectionMatrix)
glUniformMatrix4fv(viewMatrixUnif, 1, GL_TRUE, viewMatrix)
#These are used to track the rotation of the volume
LastFrameMousePos = (0, 0)
CurrentMousePos = (0, 0)
xRotation = 0
yRotation = 0
while True:
clock.tick()
for event in pygame.event.get():
if event.type == pygame.QUIT:
return
if event.type == pygame.KEYUP and event.key == pygame.K_ESCAPE:
return
if event.type == pygame.MOUSEBUTTONDOWN and event.button == 1:
CurrentMousePos = event.pos
LastFrameMousePos = CurrentMousePos
if event.type == pygame.MOUSEMOTION and 1 in event.buttons:
CurrentMousePos = event.pos
diff = (CurrentMousePos[0] - LastFrameMousePos[0],
CurrentMousePos[1] - LastFrameMousePos[1])
xRotation += event.rel[0]
yRotation += event.rel[1]
LastFrameMousePos = CurrentMousePos
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
#Perform the rotation of the mesh
moveToOrigin = np.array(
[[1.0, 0.0, 0.0, -32.0], [0.0, 1.0, 0.0, -32.0],
[0.0, 0.0, 1.0, -32.0], [0.0, 0.0, 0.0, 1.0]],
dtype='f')
rotateAroundX = np.array(
[[1.0, 0.0, 0.0, 0.0],
[0.0, cos(radians(yRotation)), -sin(radians(yRotation)), 0.0],
[0.0, sin(radians(yRotation)),
cos(radians(yRotation)), 0.0], [0.0, 0.0, 0.0, 1.0]],
dtype='f')
rotateAroundY = np.array(
[[cos(radians(xRotation)), 0.0,
sin(radians(xRotation)), 0.0], [0.0, 1.0, 0.0, 0.0],
[-sin(radians(xRotation)), 0.0,
cos(radians(xRotation)), 0.0], [0.0, 0.0, 0.0, 1.0]],
dtype='f')
modelMatrix = rotateAroundY.dot(rotateAroundX.dot(moveToOrigin))
with shader:
glUniformMatrix4fv(modelMatrixUnif, 1, GL_TRUE, modelMatrix)
glBindVertexArray(vertexArrayObject)
glDrawElements(GL_TRIANGLES, len(indices), GL_UNSIGNED_INT, None)
glBindVertexArray(0)
# Show the screen
pygame.display.flip()
