Introduction to 3D Graphics and VRML

Lighting

Lighting sources can be...

• Ambient (background)
• Directional
• Omni-directional
• Spot

VRML Lighting Example

#VRML V1.0 ascii

DirectionalLight {
  on        TRUE       # Boolean
  intensity 0.7        # Float
  color     1   1    1 # RGB Color
  direction 0   0.5 -1 # Vector
}

...

PointLight {
  on        TRUE      # Boolean
  intensity 0.7       # Float
  color     0   0   1 # RGB Color
  location  5   5   0 # Vector
}

...

SpotLight {
  on        TRUE      # Boolean
  intensity 0.8       # Float
  color     1   0  0  # RGB Color
  location  5  -1  0  # Vector
  direction -1  0  0  # Vector
  dropOffRate  0      # Float
  cutOffAngle  0.5    # Float
}