def lookAt(pos, at):
"""
Takes 2 LVector3f vectors,
Returns the lookAt matrix Mat3d
"""
# forward
yaxis = at - pos
print("forward ", yaxis)
yaxis.normalize()
# right
xaxis = LVector3f.up().cross(yaxis)
xaxis.normalize()
print("right ", xaxis)
# up
zaxis = xaxis.cross(yaxis)
zaxis.normalize()
print("up ", zaxis)
rmat = LMatrix4f()
rmat.setRow(0, xaxis)
rmat.setRow(1, zaxis)
rmat.setRow(2, yaxis)
tmat = LMatrix4f.translateMat(pos)
print(rmat*tmat)
return rmat * tmat
def getLightsForModel(self, modelId):
lights = []
if modelId in self.supportedModelIds:
for n, lightData in enumerate(self.data[modelId]):
attenuation = LVector3f(*lightData['attenuation'])
#TODO: implement light power
#power = float(lightData['power'])
positionYup = LVector3f(*lightData['position'])
yupTozupMat = LMatrix4f.convertMat(CS_yup_right, CS_zup_right)
position = yupTozupMat.xformVec(positionYup)
colorHtml = lightData['color']
color = LVector3f(*[
int('0x' + colorHtml[i:i + 2], 16)
for i in range(1, len(colorHtml), 2)
]) / 255.0
direction = None
lightType = lightData['type']
lightName = modelId + '-light-' + str(n)
if lightType == 'SpotLight':
light = Spotlight(lightName)
light.setAttenuation(attenuation)
light.setColor(color)
cutoffAngle = float(lightData['cutoffAngle'])
lens = PerspectiveLens()
lens.setFov(cutoffAngle / np.pi * 180.0)
light.setLens(lens)
# NOTE: unused attributes
#dropoffRate = float(lightData['dropoffRate'])
directionYup = LVector3f(*lightData['direction'])
direction = yupTozupMat.xformVec(directionYup)
elif lightType == 'PointLight':
light = PointLight(lightName)
light.setAttenuation(attenuation)
light.setColor(color)
elif lightType == 'LineLight':
#XXX: we may wish to use RectangleLight from the devel branch of Panda3D
light = PointLight(lightName)
light.setAttenuation(attenuation)
light.setColor(color)
# NOTE: unused attributes
#dropoffRate = float(lightData['dropoffRate'])
#cutoffAngle = float(lightData['cutoffAngle'])
#position2Yup = LVector3f(*lightData['position2'])
#position2 = yupTozupMat.xformVec(position2Yup)
#directionYup = LVector3f(*lightData['direction'])
#direction = yupTozupMat.xformVec(directionYup)
else:
raise Exception('Unsupported light type: %s' % (lightType))
lightNp = NodePath(light)
# Set position and direction of light
lightNp.setPos(position)
if direction is not None:
targetPos = position + direction
lightNp.look_at(targetPos, LVector3f.up())
lights.append(lightNp)
return lights