def getColorFromRay(self, scene, vec, viewPoint, recur=0):
""" Given other objects in the scene, return the color at the specified point.
@param scene: Scene object this World Object belongs to.
@param vec: (x,y,z) Vector point to return the current color of. NOTE: We're
assuming the passed in vec is on the surface of this object, that value is
caclulated at using self.intersection(), but we avoid calculating it again.
@param viewPoint: Current viewpoint we're looking at this object from.
@param recur: Recursion Level (we'll stop at 3)
"""
# Calculate Color from Ambient Light
surfaceColor = self.surfaceColor(vec)
colorPoint = self._getColorAmbient(scene, vec, surfaceColor)
# Calculate Color from Light Sources
for light in scene.lights:
colorFromLight = self._getColorFromLight(scene, vec, light,
viewPoint, surfaceColor)
colorPoint = color.add(colorPoint, colorFromLight)
# Calculate Color from Reflection
if (self.kr) and (recur <= 3):
colorReflect = self._getColorFromReflect(scene, vec, viewPoint,
recur)
colorPoint = color.add(colorPoint, colorReflect)
# Calculate Color from Refraction
if (self.kt) and (recur <= 3):
colorRefract = self._getColorFromRefract(scene, vec, viewPoint,
recur)
colorPoint = color.add(colorPoint, colorRefract)
return colorPoint
def calculateShading(self, intersection, depth):
point = intersection[1]
shape = intersection[2]
normal = shape.getNormalAtPoint(point)
incident_vector = (point - self.camera.position).normalized()
shapeColor = shape.getColorAtPoint(point)
log.debug("Shading {0} {1}".format(shape, point))
# ambient portion
result = color.component_scale(shapeColor, [x/255 for x in self.ambient_light])
specular_lights = []
for light in self.lights:
# shadow
lightDir = (light.position - point).normalized()
lightDist = (light.position - point).magnitude()
shadowed = False
for shape in self.shapes:
try:
dist, point = shape.intersection(lightDir, point + (normal * 0.001))
if dist <= lightDist:
shadowed = True
log.debug("Shadowed by {0} at distance {1}".format(shape, dist))
break
except TypeError:
pass
if not shadowed:
# diffuse
diffIntensity = min(max(lightDir * normal, 0), 1)
diff = color.scale(light.color, diffIntensity)
diff = color.component_scale(shapeColor, [x/255 for x in diff])
log.debug("Diff: {0} (intensity {1})".format(diff, diffIntensity))
result = color.add(result, diff)
if diffIntensity > 0:
specular_lights.append(light)
# reflection
if shape.material.reflection > 0:
reflective_vector = incident_vector - (2 * (incident_vector * normal) * normal)
reflective_component = self.fireRay(reflective_vector, point + (normal * 0.001), depth + 1)
result = color.scale(result, 1 - shape.material.reflection)
result = color.add(result, color.scale(reflective_component, shape.material.reflection))
for light in specular_lights:
# blinn-phong
viewDir = -incident_vector
halfDir = (lightDir + viewDir).normalized()
specAngle = min(max(halfDir * normal, 0), 1)
specIntensity = specAngle ** shape.material.hardness
spec = color.scale(light.color, specIntensity)
spec = color.scale(spec, shape.material.specular)
result = color.add(result, spec)
return result
def _getColorFromLight(self, scene, vec, light, viewPoint, surfaceColor):
""" Return the color of this point on the World Object prodecuded by the
the specified light source.
@param scene: Scene object this World Object belongs to.
@param vec: (x,y,z) Vector point to return the current color of.
@param light: Light object to use when calculating color.
@param viewPoint: Current viewpoint we're looking at this object from.
"""
# Calculate some variables to work with
normObject = self.normal(vec)
normLight = (light.center - vec).normalize()
isShadow = scene.isShadow(vec, light, self)
# Calculate the color from Lamberts Diffuse Algorithm
kd = [self.kd, self.kd * 0.3][isShadow]
factorLambert = max(normObject * normLight, 0)
colorLambert = color.mul(surfaceColor, factorLambert)
colorLambert = color.mul(colorLambert, kd)
# Calculate the color from Phongs Highlight Algorithm
colorPhong = (0, 0, 0)
if (not isShadow):
normReflect = normLight.reflect(normObject)
normToView = (viewPoint - vec).normalize()
factorPhong = pow(max(normReflect * normToView, 0), self.se)
colorPhong = color.mul(light.color, factorPhong)
colorPhong = color.mul(colorPhong, self.ks)
return color.add(colorLambert, colorPhong)
def get_at(self, pos):
""" Return the color at the specified point.
@param pos: (x,y) Position in the window to return the color of.
"""
obj, vec = self.getVisibleObject(pos)
if (obj):
# Update coordinfo (for footer); And return object's color
objName = obj.__class__.__name__
simpVec = tuple(map(int, vec.val()))
self.coordinfo[pos] = "%s: %s" % (objName, simpVec)
return obj.get_at(self, vec)
else:
# TODO: This should be removed, its a fake BG for prog1
vec = Vector(pos[0], pos[1], 0)
bgColor = (255, 255, 255)
bgkd = 0.7
colorPoint = color.mul(bgColor, self.ka)
for light in self.lights:
normLight = (light.center - vec).normalize()
isShadow = self.isShadow(vec, light)
# Calculate the color from Lamberts Diffuse Algorithm
kd = [bgkd, bgkd * 0.3][isShadow]
factorLambert = max(Vector(0, 0, 1) * normLight, 0)
colorLambert = color.mul(bgColor, factorLambert)
colorLambert = color.mul(colorLambert, kd)
colorPoint = color.add(colorPoint, colorLambert)
return colorPoint
return None
def __call__(self, time, delta): frames=[] for source in self.sources: frames.append(source(time,delta)) firstFrame=frames[0] #cubes c=[] for i in range(len(firstFrame[0])): c.append([]) for j in range(len(firstFrame[0][i])): c[i].append([]) for k in range(len(firstFrame[0][i][j])): c[i][j].append([]) currentSum=firstFrame[0][i][j][k] for iFrame in range(1,len(frames)): currentSum=color.add(currentSum,frames[iFrame][0][i][j][k]) c[i][j][k]=currentSum #leaves l=[] for i in range(len(firstFrame[1])): l.append([]) for j in range(len(firstFrame[1][i])): l[i].append([]) currentSum=firstFrame[1][i][j] for iFrame in range(1,len(frames)): currentSum=color.add(currentSum,frames[iFrame][1][i][j]) l[i][j]=currentSum #fissures f=[] for i in range(len(firstFrame[2])): f.append([]) currentSum=firstFrame[2][i] for iFrame in range(1,len(frames)): currentSum=color.add(currentSum,frames[iFrame][2][i]) f[i]=currentSum return [c,l,f]
def AddFrames(frames): firstFrame=frames[0] #cubes c=[] for i in range(len(firstFrame[0])): c.append([]) for j in range(len(firstFrame[0][i])): c[i].append([]) for k in range(len(firstFrame[0][i][j])): c[i][j].append([]) currentSum=firstFrame[0][i][j][k] for iFrame in range(1,len(frames)): currentSum=color.add(currentSum,frames[iFrame][0][i][j][k]) c[i][j][k]=currentSum #leaves l=[] for i in range(len(firstFrame[1])): l.append([]) for j in range(len(firstFrame[1][i])): l[i].append([]) currentSum=firstFrame[1][i][j] for iFrame in range(1,len(frames)): currentSum=color.add(currentSum,frames[iFrame][1][i][j]) l[i][j]=currentSum #fissures f=[] for i in range(len(firstFrame[2])): f.append([]) currentSum=firstFrame[2][i] for iFrame in range(1,len(frames)): currentSum=color.add(currentSum,frames[iFrame][2][i]) f[i]=currentSum return [c,l,f]
def get_at(self, scene, vec):
""" Given other objects in the scene, return the color at the specified point.
@param scene: Scene object this Sphere belongs to.
@param vec: (x,y,z) Vector point to return the current color of. NOTE: We're
assuming the passed in vec is on the surface of this object,
that value is caclulated at using self.intersection(), but we want
to avoid calculating it again.
"""
colorPoint = self._getColorAmbient(scene)
for light in scene.lights:
colorFromLight = self._getColorFromLight(scene, vec, light)
colorPoint = color.add(colorPoint, colorFromLight)
return colorPoint
