Lose of Illumination and different types of

reflectorEEE

CIVIL DEPARTMENT PERPEARD BY SHAIKH TOHID (151080106027)

SUBMITED BY ANKUR SIR

Illumination and Shading

Illumination (Lighting)

Model the interaction of light with surface points to determine their final color and brightness.

OpenGL computes illumination at vertices.

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.)

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

Basic light Sources

Ambient lighting example

Diffuse lighting example

Specular light calculation(3)

• The effect of ‘n’ in the phong model.

Ground Shading problem

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

• 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 .

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

Fill cards and Reflector

• The open side of the umbrella faces the subject and the light shines into it .

Optical sensors

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