def toonDrawTorus(majorRadius, minorRadius, numMajor, numMinor, lightDir):
mModelViewMatrix = M3DMatrix44f()
mInvertedLight = M3DMatrix44f()
vNewLight = M3DVector3f()
vNormal = M3DVector3f()
majorStep = 2.0 * M3D_PI / numMajor
minorStep = 2.0 * M3D_PI / numMinor
# Get the modelview matrix
glGetFloatv(GL_MODELVIEW_MATRIX, mModelViewMatrix)
# Instead of transforming every normal and then dotting it with
# the light vector, we will transform the light into object
# space by multiplying it by the inverse of the modelview matrix
m3dInvertMatrix44(mInvertedLight, mModelViewMatrix)
m3dTransformVector3(vNewLight, vLightDir, mInvertedLight)
vNewLight[0] -= mInvertedLight[12]
vNewLight[1] -= mInvertedLight[13]
vNewLight[2] -= mInvertedLight[14]
m3dNormalizeVector(vNewLight)
# Draw torus as a series of triangle strips
for i in range(0, numMajor):
a0 = i * majorStep
a1 = a0 + majorStep
x0 = cos(a0)
y0 = sin(a0)
x1 = cos(a1)
y1 = sin(a1)
glBegin(GL_TRIANGLE_STRIP)
for j in range(0, numMinor + 1):
b = j * minorStep
c = cos(b)
r = minorRadius * c + majorRadius
z = minorRadius * sin(b)
# First point
vNormal[0] = x0 * c
vNormal[1] = y0 * c
vNormal[2] = z / minorRadius
m3dNormalizeVector(vNormal)
# Texture coordinate is set by intensity of light
glTexCoord1f(m3dDotProduct(vNewLight, vNormal))
glVertex3f(x0 * r, y0 * r, z)
# Second point
vNormal[0] = x1 * c
vNormal[1] = y1 * c
vNormal[2] = z / minorRadius
m3dNormalizeVector(vNormal)
# Texture coordinate is set by intensity of light
glTexCoord1f(m3dDotProduct(vNewLight, vNormal))
glVertex3f(x1 * r, y1 * r, z)
glEnd()
def GetMatrix(self, bRotationOnly=False):
matrix = M3DMatrix44f()
# Calculate the right side (x) vector, drop it right into the matrix
vXAxis = m3dCrossProduct(self.vUp, self.vForward)
# m3dSetMatrixColum44 does not fill in the fourth value...
# X Column
m3dSetMatrixColumn44(matrix, vXAxis, 0)
matrix[3] = 0.0
# Y Column
m3dSetMatrixColumn44(matrix, self.vUp, 1)
matrix[7] = 0.0
# Z Column
m3dSetMatrixColumn44(matrix, self.vForward, 2)
matrix[11] = 0.0
# Translation (already done)
if (bRotationOnly == True):
matrix[12] = 0.0
matrix[13] = 0.0
matrix[14] = 0.0
else:
m3dSetMatrixColumn44(matrix, self.vOrigin, 3)
matrix[15] = 1.0
return matrix
def DrawGLScene():
# Clear the window
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
glPushMatrix()
frameCamera.ApplyCameraTransform() # Move the camera about
# Sky Box is manually textured
glDisable(GL_TEXTURE_GEN_S)
glDisable(GL_TEXTURE_GEN_T)
glDisable(GL_TEXTURE_GEN_R)
DrawSkyBox()
# Use texgen to apply cube map
glEnable(GL_TEXTURE_GEN_S)
glEnable(GL_TEXTURE_GEN_T)
glEnable(GL_TEXTURE_GEN_R)
glPushMatrix()
glTranslatef(0.0, 0.0, -3.0)
glMatrixMode(GL_TEXTURE)
glPushMatrix()
# Invert camera matrix (rotation only) and apply to
# texture coordinates
m = M3DMatrix44f()
invert = M3DMatrix44f()
m = frameCamera.GetCameraOrientation()
m3dInvertMatrix44(invert, m)
glMultMatrixf(invert)
gltDrawSphere(0.75, 41, 41)
glPopMatrix()
glMatrixMode(GL_MODELVIEW)
glPopMatrix()
glPopMatrix()
glutSwapBuffers()
def on_draw(self):
# Clear the window with the current clearing color
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
transformationMatrix = M3DMatrix44f()
# Build a rotation matrix
m3dRotationMatrix44(transformationMatrix, m3dDegToRad(yRot), 0.0, 1.0, 0.0)
transformationMatrix[12] = 0.0
transformationMatrix[13] = 0.0
transformationMatrix[14] = -2.5
glLoadMatrixf(transformationMatrix)
gltDrawTorus(0.35, 0.15, 40, 20)
def on_draw(self):
# Clear the window
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
glPushMatrix()
frameCamera.ApplyCameraTransform() # Move the camera about
# Sky Box is manually textured
glActiveTexture(GL_TEXTURE0)
glDisable(GL_TEXTURE_2D)
glActiveTexture(GL_TEXTURE1)
glEnable(GL_TEXTURE_CUBE_MAP)
glDisable(GL_TEXTURE_GEN_S)
glDisable(GL_TEXTURE_GEN_T)
glDisable(GL_TEXTURE_GEN_R)
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL)
# DrawSkyBox()
# Use texgen to apply cube map
glEnable(GL_TEXTURE_GEN_S)
glEnable(GL_TEXTURE_GEN_T)
glEnable(GL_TEXTURE_GEN_R)
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE)
glActiveTexture(GL_TEXTURE0)
glEnable(GL_TEXTURE_2D)
glPushMatrix()
glTranslatef(0.0, 0.0, -3.0)
glActiveTexture(GL_TEXTURE1)
glMatrixMode(GL_TEXTURE)
glPushMatrix()
# Invert camera matrix (rotation only) and apply to
# texture coordinates
invert = M3DMatrix44f()
m = frameCamera.GetCameraOrientation()
m3dInvertMatrix44(invert, m)
glMultMatrixf(invert)
glColor3f(1.0, 1.0, 1.0)
gltDrawSphere(0.75, 41, 41)
glPopMatrix()
glMatrixMode(GL_MODELVIEW)
glPopMatrix()
glPopMatrix()
def DrawGLScene():
# Clear the window with the current clearing color
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
transformationMatrix = M3DMatrix44f()
# Build a rotation matrix
m3dRotationMatrix44(transformationMatrix, m3dDegToRad(yRot), 0.0, 1.0, 0.0)
transformationMatrix[12] = 0.0
transformationMatrix[13] = 0.0
transformationMatrix[14] = -2.5
DrawTorus(transformationMatrix)
glutSwapBuffers()
def RotateLocalY(self, fAngle):
# Just Rotate around the up vector
# Create a rotation matrix around my Up (Y) vector
rotMat = M3DMatrix44f()
m3dRotationMatrix44(rotMat, fAngle, self.vUp[0], self.vUp[1],
self.vUp[2])
newVect = M3DVector3f()
# Rotate forward pointing vector (inlined 3x3 transform)
newVect[0] = rotMat[0] * self.vForward[0] + rotMat[4] * self.vForward[
1] + rotMat[8] * self.vForward[2]
newVect[1] = rotMat[1] * self.vForward[0] + rotMat[5] * self.vForward[
1] + rotMat[9] * self.vForward[2]
newVect[2] = rotMat[2] * self.vForward[0] + rotMat[6] * self.vForward[
1] + rotMat[10] * self.vForward[2]
self.vForward[0] = newVect[0]
self.vForward[1] = newVect[1]
self.vForward[2] = newVect[2]
def GetCameraOrientation(self):
m = M3DMatrix44f()
x = M3DVector3f()
z = M3DVector3f()
# Make rotation matrix
# Z vector is reversed
z[0] = -self.vForward[0]
z[1] = -self.vForward[1]
z[2] = -self.vForward[2]
# X vector = Y cross Z
x = m3dCrossProduct(self.vUp, z)
# Matrix has no translation information and is
# transposed.... (rows instead of columns)
m[0] = x[0]
m[1] = x[1]
m[2] = x[2]
m[3] = 0.0
m[4] = self.vUp[0]
m[5] = self.vUp[1]
m[6] = self.vUp[2]
m[7] = 0.0
m[8] = z[0]
m[9] = z[1]
m[10] = z[2]
m[11] = 0.0
m[12] = 0.0
m[13] = 0.0
m[14] = 0.0
m[15] = 1.0
return m
spheres = [GLFrame() for i in range(NUM_SPHERES)]
frameCamera = GLFrame()
# Light and material data
# pyglet reverses y direction
fLightPos = (GLfloat * 4)(-100.0, 100.0, 50.0, 1.0)
lightArrayType = GLfloat * 4
fNoLight = lightArrayType(0.0, 0.0, 0.0, 0.0)
fLowLight = lightArrayType(0.25, 0.25, 0.25, 1.0)
fBrightLight = lightArrayType(1.0, 1.0, 1.0, 1.0)
yRot = 0.0 # Rotation angle for animation
mShadowMatrix = M3DMatrix44f()
# Draw a gridded ground
def DrawGround():
fExtent = 20.0
fStep = 1.0
y = -0.4
iStrip = -fExtent
while (iStrip <= fExtent):
t = 0.0
glBegin(GL_TRIANGLE_STRIP)
glNormal3f(0.0, 1.0, 0.0) # All point up
iRun = fExtent
sys.path.append("../shared")
from math3d import M3DVector3f, m3dFindNormal, M3DMatrix44f, m3dGetPlaneEquation, m3dMakePlanarShadowMatrix
from fakeglut import glutSolidSphere
xRot = 0.0
yRot = 0.0
lightArrayType = GLfloat * 4
ambientLight = lightArrayType(0.3, 0.3, 0.3, 1.0)
diffuseLight = lightArrayType(0.7, 0.7, 0.7, 1.0)
specular = lightArrayType(1.0, 1.0, 1.0, 1.0)
lightPos = (GLfloat * 4)(-75.0, 150.0, -50.0, 0.0)
specref = (GLfloat * 4)(1.0, 1.0, 1.0, 1.0)
shadowMat = M3DMatrix44f()
def DrawJet(nShadow):
# Set material color, note we only have to set to black
# for the shadow once
if nShadow == 0:
glColor3ub(128, 128, 128)
else:
glColor3ub(0,0,0)
# Nose Cone - Points straight down
# Set material color
glBegin(GL_TRIANGLES)
glNormal3f(0.0, -1.0, 0.0)
def RegenerateShadowMap():
global textureMatrix, strips
lightModelview = (GLfloat * 16)()
lightProjection = (GLfloat * 16)()
sceneBoundingRadius = 95.0 # based on objects in scene
# Save the depth precision for where it's useful
lightToSceneDistance = sqrt(lightPos[0] * lightPos[0] +
lightPos[1] * lightPos[1] +
lightPos[2] * lightPos[2])
nearPlane = lightToSceneDistance - sceneBoundingRadius
# Keep the scene filling the depth texture
fieldOfView = m3dRadToDeg(2.0 *
atan(sceneBoundingRadius / lightToSceneDistance))
glMatrixMode(GL_PROJECTION)
glLoadIdentity()
gluPerspective(fieldOfView, 1.0, nearPlane,
nearPlane + (2.0 * sceneBoundingRadius))
glGetFloatv(GL_PROJECTION_MATRIX, lightProjection)
# Switch to light's point of view
glMatrixMode(GL_MODELVIEW)
glLoadIdentity()
gluLookAt(lightPos[0], lightPos[1], lightPos[2], 0.0, 0.0, 0.0, 0.0, 1.0,
0.0)
glGetFloatv(GL_MODELVIEW_MATRIX, lightModelview)
glViewport(0, 0, shadowWidth, shadowHeight)
# Clear the depth buffer only
glClear(GL_DEPTH_BUFFER_BIT)
# All we care about here is resulting depth values
glShadeModel(GL_FLAT)
glDisable(GL_LIGHTING)
glDisable(GL_COLOR_MATERIAL)
glDisable(GL_NORMALIZE)
glColorMask(0, 0, 0, 0)
# Overcome imprecision
glEnable(GL_POLYGON_OFFSET_FILL)
# Draw objects in the scene except base plane
# which never shadows anything
DrawModels(False)
# Copy depth values into depth texture
glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, 0, 0, shadowWidth,
shadowHeight, 0)
# Restore normal drawing state
glShadeModel(GL_SMOOTH)
glEnable(GL_LIGHTING)
glEnable(GL_COLOR_MATERIAL)
glEnable(GL_NORMALIZE)
glColorMask(1, 1, 1, 1)
glDisable(GL_POLYGON_OFFSET_FILL)
# Set up texture matrix for shadow map projection,
# which will be rolled into the eye linear
# texture coordinate generation plane equations
tempMatrix = M3DMatrix44f()
m3dLoadIdentity44(tempMatrix)
m3dTranslateMatrix44(tempMatrix, 0.5, 0.5, 0.5)
m3dScaleMatrix44(tempMatrix, 0.5, 0.5, 0.5)
m3dMatrixMultiply44(textureMatrix, tempMatrix, lightProjection)
m3dMatrixMultiply44(tempMatrix, textureMatrix, lightModelview)
# transpose to get the s, t, r, and q rows for plane equations
m3dTransposeMatrix44(textureMatrix, tempMatrix)
# this seems sorta awkward, but I haven't hit on a better way to index into the array in a fashion that
# pyglet will work with.
strips = [
(GLfloat * 4)(textureMatrix[4], textureMatrix[5], textureMatrix[6],
textureMatrix[7]),
(GLfloat * 4)(textureMatrix[8], textureMatrix[9], textureMatrix[10],
textureMatrix[11]),
(GLfloat * 4)(textureMatrix[12], textureMatrix[13], textureMatrix[14],
textureMatrix[15]),
]
shadowWidth = 1024 # set based on window size
shadowHeight = 512
shadowTextureID = GLuint(0)
maxTexSize = GLint(0) # maximum allowed size for 1D/2D texture
ambientLight = (GLfloat * 4)(0.2, 0.2, 0.2, 1.0)
diffuseLight = (GLfloat * 4)(0.7, 0.7, 0.7, 1.0)
noLight = (GLfloat * 4)(0.0, 0.0, 0.0, 1.0)
lightPos = (GLfloat * 4)(100.0, 300.0, 100.0, 1.0)
cameraPos = (GLfloat * 4)(100.0, 150.0, 200.0, 1.0)
cameraZoom = 0.3
textureMatrix = M3DMatrix44f()
global strips
# Called to draw scene objects
def DrawModels(drawBasePlane):
if drawBasePlane:
# Draw plane that the objects rest on
glColor3f(0.0, 0.0, 0.90) # Blue
glNormal3f(0.0, 1.0, 0.0)
glBegin(GL_QUADS)
glVertex3f(-100.0, -25.0, -100.0)
glVertex3f(-100.0, -25.0, 100.0)
glVertex3f(100.0, -25.0, 100.0)
glVertex3f(100.0, -25.0, -100.0)
glEnd()
def on_draw(self):
mCubeTransform = M3DMatrix44f()
# Clear the window with current clearing color
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
glShadeModel(GL_SMOOTH)
glEnable(GL_NORMALIZE)
glPushMatrix()
# Draw plane that the cube rests on
glDisable(GL_LIGHTING)
if nStep == 5:
glColor3ub(255, 255, 255)
glEnable(GL_TEXTURE_2D)
glBindTexture(GL_TEXTURE_2D, textures[0])
glBegin(GL_QUADS)
glTexCoord2f(0.0, 0.0)
glVertex3f(-100.0, -25.3, -100.0)
glTexCoord2f(0.0, 1.0)
glVertex3f(-100.0, -25.3, 100.0)
glTexCoord2f(1.0, 1.0)
glVertex3f(100.0, -25.3, 100.0)
glTexCoord2f(1.0, 0.0)
glVertex3f(100.0, -25.3, -100.0)
glEnd()
else:
glColor3f(0.0, 0.0, 0.90) # Blue
glBegin(GL_QUADS)
glVertex3f(-100.0, -25.3, -100.0)
glVertex3f(-100.0, -25.3, 100.0)
glVertex3f(100.0, -25.3, 100.0)
glVertex3f(100.0, -25.3, -100.0)
glEnd()
# Set drawing color to Red
glColor3f(1.0, 0.0, 0.0)
# Enable, disable lighting
if nStep > 2:
glEnable(GL_DEPTH_TEST)
glDepthFunc(GL_LEQUAL)
glEnable(GL_COLOR_MATERIAL)
glLightfv(GL_LIGHT0, GL_AMBIENT, lightAmbient)
glLightfv(GL_LIGHT0, GL_DIFFUSE, lightDiffuse)
glLightfv(GL_LIGHT0, GL_SPECULAR, lightSpecular)
glEnable(GL_LIGHTING)
glEnable(GL_LIGHT0)
glMaterialfv(GL_FRONT, GL_SPECULAR, lightSpecular)
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, materialColor)
glMateriali(GL_FRONT, GL_SHININESS, 128)
# Move the cube slightly forward and to the left
glTranslatef(-10.0, 0.0, 10.0)
if nStep == 0:
# Just draw the wire framed cube
glutWireCube(50.0)
# Same wire cube with hidden line removal simulated
elif nStep == 1:
# Front Face (before rotation)
glBegin(GL_LINES)
glVertex3f(25.0, 25.0, 25.0)
glVertex3f(25.0, -25.0, 25.0)
glVertex3f(25.0, -25.0, 25.0)
glVertex3f(-25.0, -25.0, 25.0)
glVertex3f(-25.0, -25.0, 25.0)
glVertex3f(-25.0, 25.0, 25.0)
glVertex3f(-25.0, 25.0, 25.0)
glVertex3f(25.0, 25.0, 25.0)
glEnd()
# Top of cube
glBegin(GL_LINES)
# Front Face
glVertex3f(25.0, 25.0, 25.0)
glVertex3f(25.0, 25.0, -25.0)
glVertex3f(25.0, 25.0, -25.0)
glVertex3f(-25.0, 25.0, -25.0)
glVertex3f(-25.0, 25.0, -25.0)
glVertex3f(-25.0, 25.0, 25.0)
glVertex3f(-25.0, 25.0, 25.0)
glVertex3f(25.0, 25.0, 25.0)
glEnd()
# Last two segments for effect
glBegin(GL_LINES)
glVertex3f(25.0, 25.0, -25.0)
glVertex3f(25.0, -25.0, -25.0)
glVertex3f(25.0, -25.0, -25.0)
glVertex3f(25.0, -25.0, 25.0)
glEnd()
# Uniform colored surface, looks 2D and goofey
elif nStep == 2:
glutSolidCube(50.0)
elif nStep == 3:
glutSolidCube(50.0)
# Draw a shadow with some lighting
elif nStep == 4:
glGetFloatv(GL_MODELVIEW_MATRIX, mCubeTransform)
glutSolidCube(50.0)
glPopMatrix()
# Disable lighting, we'll just draw the shadow as black
glDisable(GL_LIGHTING)
glPushMatrix()
pPlane = m3dGetPlaneEquation(ground[0], ground[1], ground[2])
mCubeTransform = m3dMakePlanarShadowMatrix(pPlane, vLightPos)
#MakeShadowMatrix(ground, lightpos, cubeXform)
glMultMatrixf(mCubeTransform)
glTranslatef(-10.0, 0.0, 10.0)
# Set drawing color to Black
glColor3f(0.0, 0.0, 0.0)
glutSolidCube(50.0)
elif nStep == 5:
glColor3ub(255, 255, 255)
glGetFloatv(GL_MODELVIEW_MATRIX, mCubeTransform)
# Front Face (before rotation)
glBindTexture(GL_TEXTURE_2D, textures[1])
glBegin(GL_QUADS)
glTexCoord2f(1.0, 1.0)
glVertex3f(25.0, 25.0, 25.0)
glTexCoord2f(1.0, 0.0)
glVertex3f(25.0, -25.0, 25.0)
glTexCoord2f(0.0, 0.0)
glVertex3f(-25.0, -25.0, 25.0)
glTexCoord2f(0.0, 1.0)
glVertex3f(-25.0, 25.0, 25.0)
glEnd()
# Top of cube
glBindTexture(GL_TEXTURE_2D, textures[2])
glBegin(GL_QUADS)
# Front Face
glTexCoord2f(0.0, 0.0)
glVertex3f(25.0, 25.0, 25.0)
glTexCoord2f(1.0, 0.0)
glVertex3f(25.0, 25.0, -25.0)
glTexCoord2f(1.0, 1.0)
glVertex3f(-25.0, 25.0, -25.0)
glTexCoord2f(0.0, 1.0)
glVertex3f(-25.0, 25.0, 25.0)
glEnd()
# Last two segments for effect
glBindTexture(GL_TEXTURE_2D, textures[3])
glBegin(GL_QUADS)
glTexCoord2f(1.0, 1.0)
glVertex3f(25.0, 25.0, -25.0)
glTexCoord2f(1.0, 0.0)
glVertex3f(25.0, -25.0, -25.0)
glTexCoord2f(0.0, 0.0)
glVertex3f(25.0, -25.0, 25.0)
glTexCoord2f(0.0, 1.0)
glVertex3f(25.0, 25.0, 25.0)
glEnd()
glPopMatrix()
# Disable lighting, we'll just draw the shadow as black
glDisable(GL_LIGHTING)
glDisable(GL_TEXTURE_2D)
glPushMatrix()
pPlane = m3dGetPlaneEquation(ground[0], ground[1], ground[2])
mCubeTransform = m3dMakePlanarShadowMatrix(pPlane, vLightPos)
glMultMatrixf(mCubeTransform)
glTranslatef(-10.0, 0.0, 10.0)
# Set drawing color to Black
glColor3f(0.0, 0.0, 0.0)
glutSolidCube(50.0)
glPopMatrix()
