EEE

1. Lose of Illumination and
different types of reflector
EEE
CIVIL DEPARTMENT
PERPEARD BY
SHAIKH TOHID (151080106027)
SUBMITED BY
ANKUR SIR

2. Illumination and Shading

3. Illumination (Lighting)
 Model the interaction of light with
surface points to determine their final
color and brightness.
 OpenGL computes illumination at
vertices.

4. Illumination Model
 The governing principles for computing the illumination .
 A illumination model usually considers :
1. Light attributes (light intensity ,color ,position ,direction
,shape )
2. Object surface attributes (color, reflectivity, transparency
,etc)
3. Interaction among lights and objects (objects orientation )
4. Interaction between objects and eye (viewing dir.)

5. Illumination Model
• Global illumination : take into account the interaction of light from all
the surfaces in the scene.

6. Basic light Sources

7. Ambient lighting example


8. Diffuse lighting example

9. Specular light calculation(3)
• The effect of ‘n’ in the phong model.

10. Ground Shading problem

11. Lose of illumination
• Street lighting
 Mercury and sodium lamps have been found to be very suitable for this
purpose.
Their initial cost is high but power consumption is low.
 Hence looking over all , these lamp prove to be more economical as
camper to filament lamps .
Illumination required depends upon the class of the street .
The following table gives a better understanding of the metter

12. • Street lighting should be such that traffic ,
obstructions on the road and surroundings must be
clearly visible for safety and convenience.
• Also the area must look attractive and pleasing to the
eye .

13. Types of reflector
 Corner Reflector.
 Paraboloid .
 parabolic .
 Spherical.
 Cassegrain.
 Gregorian.

14. Fill cards and Reflector
• The open side of the umbrella faces the subject
and the light shines into it .

15. Optical sensors

16. Thank you